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CALCULATION OF REGISTRATION FEE

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Filed Pursuant to Rule 424(b)(2)

Registration Statement No. 333-183951

333-183951-01

333-183951-02

The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities and we are not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

Subject to completion dated September 25, 2013

PRELIMINARY PROSPECTUS SUPPLEMENT

(to Prospectus dated September 18, 2012)

BHP Billiton Finance (USA) Limited

US$                      % Senior Notes due 20    

US$                      % Senior Notes due 20    

US$                      % Senior Notes due 20    

US$                      % Senior Notes due 20    

US$                      % Senior Notes due 20    

US$             Senior Floating Rate Notes due 20    

Fully and unconditionally guaranteed by

BHP Billiton Plc and BHP Billiton Limited

BHP Billiton Finance (USA) Limited is selling US$             aggregate principal amount of         % senior notes due 20        , US$             aggregate principal amount of         % senior notes due 20        , US$             aggregate principal amount of         % senior notes due 20        , US$             aggregate principal amount of         % senior notes due 20        , US$             aggregate principal amount of         % senior notes due 20         (collectively, the “fixed rate notes”) and US$             aggregate principal amount of senior floating rate notes due 20        . BHP Billiton Finance (USA) will pay interest on the fixed rate notes semi-annually in arrears on              and              of each year, beginning on             , 2013 until, and including, the respective maturity date. BHP Billiton Finance (USA) will pay interest on the senior floating rate notes on             ,             ,              and              of each year, beginning on             , 2013 until, and including, their maturity date.

The notes will be issued by BHP Billiton Finance (USA) and will be guaranteed by each of BHP Billiton Limited, an Australian limited company, and BHP Billiton Plc, an English public limited company. The notes will rank equally in right of payment with all of the issuer’s other unsecured and unsubordinated debt obligations. The guarantees will rank equally in the right of payment with each guarantor’s other unsecured and unsubordinated debt obligations.

BHP Billiton Finance (USA) will make payments of principal and interest on the notes, and the guarantors will make any payments coming due under the guarantees, free and clear of, and without withholding or deduction for, any Australian and United Kingdom taxes. In the event that payments of principal and interest on the notes or the guarantees become subject to Australian or United Kingdom withholding tax, BHP Billiton Finance (USA) or the guarantors, as applicable, will pay additional amounts so that the amount received by holders of notes after withholding tax will equal the amount that would have been received had no withholding tax been applicable, subject to some exceptions described in the attached prospectus.

Each series of the fixed rate notes will be redeemable by BHP Billiton, at its option, in whole or in part, at any time at the redemption price determined under “Description of Notes—Optional make-whole redemption.”

In the event that changes in withholding tax law, treaties or interpretations require BHP Billiton Finance (USA) or the guarantors to pay these additional amounts, it may redeem the notes before their stated maturity at a price equal to 100% of their principal amount plus accrued interest to, but not including, the redemption date.

See “Risk Factors” beginning on page 1 of the attached prospectus for a discussion of material risks that you should consider before deciding whether to invest in the notes.

Neither the Securities and Exchange Commission (the “SEC”) nor any other regulatory body has approved or disapproved of these securities, or passed upon the accuracy or adequacy of this prospectus supplement or the attached prospectus. Any representation to the contrary is a criminal offence.

Interest on the notes will accrue from and including the delivery date.

The underwriters are offering the notes subject to various conditions. The underwriters expect to deliver the notes in book-entry form through the facilities of The Depository Trust Company and its participants, including Euroclear and Clearstream, Luxembourg, on or about                     , 2013.

Bookrunners

September                     , 2013.

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You should read this prospectus supplement along with the attached prospectus. Both documents contain information you should consider when making your investment decision. You should rely on the information contained in or incorporated by reference into this prospectus supplement and the attached prospectus. We have not, and the underwriters have not, authorized any other person to provide you with different information. If anyone does provide you with different or inconsistent information, you may not rely on it. We are not, and the underwriters are not, making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted. You should assume that the information appearing in this prospectus supplement and the attached prospectus is accurate only as of the date on the bottom of the front cover of this prospectus supplement. Our business, financial condition, results of operations and prospects may have changed since that date.

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ABOUT THIS PROSPECTUS SUPPLEMENT

In this prospectus supplement, the terms “we,” “our,” “us,” “BHP Billiton” and “BHP Billiton Group” refer to BHP Billiton Limited and BHP Billiton Plc, together with their respective subsidiaries (including the issuer). “BHP Billiton Limited Group” refers to the group that is BHP Billiton Limited and its subsidiary companies. “BHP Billiton Plc Group” refers to the group that is BHP Billiton Plc and its subsidiary companies. “BHP Billiton Limited” refers to the parent entity that was formerly BHP Limited before the implementation of the dual listed company structure and “BHP Billiton Plc” refers to the parent entity that was formerly Billiton Plc before the implementation of the dual listed company structure. We refer to BHP Billiton Finance (USA) Limited as “BHP Billiton Finance (USA)” or the “issuer.” We refer to BHP Billiton Limited and BHP Billiton Plc together as the “guarantors.”

This prospectus supplement contains the terms for this offering of notes. This prospectus supplement, or the information incorporated by reference in this prospectus supplement, may add, update or change information in, or incorporated by reference into, the attached prospectus. If information in this prospectus supplement, or the information incorporated by reference in this prospectus supplement, is inconsistent with the information in the attached prospectus, then the information in, or incorporated by reference into, this prospectus supplement, will apply and will supersede that information in, or incorporated by reference into, the attached prospectus. Capitalized terms used but not defined in this prospectus supplement have the meanings given to those terms in the attached prospectus.

It is important for you to read and consider all information contained or incorporated by reference in this prospectus supplement and the attached prospectus in making your investment decision. You should also read and consider the information in the documents we have referred you to under “Where you can find additional information.”

FORWARD-LOOKING STATEMENTS

Some of the information contained or incorporated by reference in this prospectus supplement may constitute “forward-looking statements” (within the meaning of Section 27A of the U.S. Securities Act of 1933 and Section 21E of the U.S. Securities Exchange Act of 1934), which are subject to various risks and uncertainties. These statements can be identified by the use of forward-looking terminology such as “intend,” “aim,” “project,” “anticipate,” “estimate,” “plan,” “believe” “expect,” “may,” “should,” “will,” “continue,” or other similar words. These statements discuss future expectations concerning the results of operations or financial condition, or provide other forward-looking statements. Our actual results, performance or achievements could be significantly different from the results expressed in, or implied by, those forward-looking statements. You should not place undue reliance on any forward-looking statement, which speaks only as of the date made.

These statements include, but are not limited to, the information regarding:

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These forward-looking statements are not guarantees or predictions of future performance, and involve known and unknown risks, uncertainties and other factors, many of which are beyond our control, and which may cause actual results to differ materially from those expressed in the statements contained in this prospectus supplement or the attached prospectus (including the documents incorporated by reference herein). When considering these forward-looking statements, you should keep in mind the cautionary statements contained or incorporated by reference in this prospectus supplement and the attached prospectus. These statements describe circumstances that could cause actual results to differ materially from those contained in any forward-looking statement.

For example, our future revenues from our operations, projects or mines described in this prospectus supplement and the attached prospectus (including the documents incorporated by reference herein) will be based, in part, upon the market price of the minerals, metals or petroleum produced, which may vary significantly from current levels. These variations, if materially adverse, may affect the timing or the feasibility of the development of a particular project, the expansion of certain facilities or mines, or the continuation of existing operations.

Other factors that may affect the actual construction or production commencement dates, costs or production output and anticipated lives of operations, mines or facilities include our ability to profitably produce and transport the minerals, petroleum and/or metals extracted to applicable markets; the impact of foreign currency exchange rates on the market prices of the minerals, petroleum or metals we produce; activities of government authorities in some of the countries where we are exploring or developing these projects, facilities or mines, including increases in taxes, changes in environmental and other regulations and political uncertainty; labour unrest; and other factors identified in the risk factors within our Annual Report on Form 20-F for the fiscal year ended June 30, 2013, as incorporated by reference herein. We cannot assure you that our estimated economically recoverable reserve figures, closure or divestment of operations or facilities, including associated costs, actual production or commencement dates, cost or production output, or anticipated lives of the projects, mines and facilities discussed will not differ materially from the statements contained in, or incorporated by reference in, this prospectus supplement and the attached prospectus.

Except as required by applicable regulations or by law, we do not undertake any obligation to publicly update or review any forward-looking statements, whether as a result of new information or future events.

CREDIT RATINGS

The credit ratings ascribed to us are intended to reflect our ability to meet our payment obligations in respect of the notes and the guarantees, and may not reflect the potential impact of any changes in future expectations concerning our results of operations or financial condition, risks related to our business structure and other factors on the value of the notes. In addition, actual or anticipated changes in our credit ratings may generally be expected to affect the market value of the notes. There can be no assurance that our credit ratings will remain in effect for any given period of time or that a rating will not be lowered, suspended or withdrawn entirely if, in the applicable rating agency’s judgment, circumstances so warrant.

INCORPORATION BY REFERENCE

The SEC allows BHP Billiton Limited and BHP Billiton Plc to “incorporate by reference” the information each of them files or furnishes with the SEC. This permits BHP Billiton Limited and BHP Billiton Plc to disclose

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important information to you by referring you to these filed or furnished documents. Any information referenced in this way is considered part of this prospectus supplement and the attached prospectus, and any information that we file or furnish with the SEC subsequent to this prospectus supplement and incorporate by reference into this prospectus supplement and the attached prospectus will automatically be deemed to update and supersede this information, as described in more detail below. We incorporate by reference the following documents that have been filed or furnished with the SEC:

Any statement contained herein, or in a document all or a portion of which is incorporated or deemed to be incorporated by reference herein, shall be deemed to be modified or superseded for purposes of the registration statement, this prospectus supplement and the attached prospectus to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this registration statement, this prospectus supplement or the attached prospectus.

We will provide without charge, upon written or oral request, a copy of any or all of the documents incorporated by reference in this prospectus supplement and the attached prospectus, other than exhibits which are specifically incorporated by reference in such documents. Requests should be directed to BHP Billiton, 171 Collins Street, Melbourne, Victoria 3000, Australia; telephone: +61 1300 554 757 (within Australia); +61 3 9609 3015 (outside Australia).

WHERE YOU CAN FIND ADDITIONAL INFORMATION

BHP Billiton Limited and BHP Billiton Plc file or furnish annual and other reports and other information with the SEC. You may read and copy any document that BHP Billiton Limited or BHP Billiton Plc has filed or furnished at the SEC’s public reference room located at 100 F Street, NE Washington, DC 20549. Please call the SEC at 1-800-SEC-0330 for further information on the public reference room. In addition, the SEC maintains an Internet site (www.sec.gov) that contains reports filed or furnished by us. Such documents are only incorporated by reference to the extent set forth herein. See “Incorporation by reference.”

American Depositary Shares (“ADSs”) representing ordinary shares of BHP Billiton Limited, evidenced by American Depositary Receipts (“ADRs”), are listed on the New York Stock Exchange, and its ordinary shares are listed on the Australian Securities Exchange (“ASX”). ADSs representing ordinary shares of BHP Billiton Plc, evidenced by ADRs, are listed on the New York Stock Exchange (“NYSE”), and its ordinary shares are admitted to the Official List of the Financial Conduct Authority in its capacity as competent authority under the United Kingdom Financial Services and Markets Act 2000, referred to as the UK Financial Conduct Authority, and the London Stock Exchange Plc for trading on the London Stock Exchange’s Regulated Market. You can consult reports and other information about BHP Billiton Limited that it has filed pursuant to the rules of the NYSE and the ASX, and about BHP Billiton Plc that it has filed pursuant to the rules of the NYSE and the UK Financial Conduct Authority, at those exchanges or authority. Such documents are not incorporated into this prospectus supplement and the attached prospectus.

We will make available to the holders of the notes, at the corporate trust office of the trustee under the indenture governing the notes, copies of the indenture as well as our most recent annual report on Form 20-F, including a review of operations, and annual audited consolidated financial statements prepared in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board, or IFRS. We will also make available at the corporate trust office of the trustee our semi-annual consolidated financial statements, prepared in accordance with IFRS. We have not provided, and do not intend to provide, a reconciliation of our financial results to generally accepted accounting principles in the United States.

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USE OF PROCEEDS

We anticipate the net proceeds from the issue and sale of the notes, after deducting underwriting discounts and commissions and our estimated expenses, will be approximately US$            . We intend to use the net proceeds from the offering of the notes for general corporate purposes.

RATIO OF EARNINGS TO FIXED CHARGES

Shown below is the ratio of earnings to fixed charges for the BHP Billiton Group for the periods indicated.

We computed the ratio of earnings to fixed charges by dividing the amount of earnings by the amount of fixed charges. For the purposes of calculating this ratio, we have calculated earnings by adding pre-tax income before adjustment for minority interests in consolidated subsidiaries or income or loss from equity investees, fixed charges and distributed income of equity investees. Interest capitalized and the minority interest in pre-tax income of subsidiaries that have not incurred fixed charges were subtracted from the total of the added items. Fixed charges consist of interest costs, both expensed and capitalized, a reasonable approximation of the interest component of rental expense and pre-tax earnings required to cover any preferred stock dividend requirements.

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CAPITALIZATION AND INDEBTEDNESS

The following table sets out the capitalization of the BHP Billiton Group at June 30, 2013, and as adjusted to give effect to this offering and the application of the proceeds thereof, in accordance with IFRS.

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SELECTED CONSOLIDATED FINANCIAL INFORMATION

The selected financial information for BHP Billiton reflects the combined operations of both BHP Billiton Limited and BHP Billiton Plc. BHP Billiton Limited and BHP Billiton Plc each reports, as its primary financial statements under the requirements of the SEC, the BHP Billiton Group’s consolidated financial statements prepared in accordance with IFRS as issued by the International Accounting Standards Board and presented in US dollars.

The selected consolidated financial information for the BHP Billiton Group set forth below as at June 30, 2013 and 2012 and for the fiscal years ended June 30, 2013, 2012 and 2011 has been derived from and should be read in conjunction with and is qualified in its entirety by reference to the financial statements of the BHP Billiton Group for the corresponding periods and the accompanying notes thereto included in our Annual Report on Form 20-F for the fiscal year ended June 30, 2013 and incorporated by reference herein. The selected consolidated financial information for the BHP Billiton Group set forth below as at June 30, 2011, 2010 and 2009 and for the fiscal years ended June 30, 2010 and 2009 has been derived from and should be read in conjunction with and is qualified in its entirety by reference to the financial statements of the BHP Billiton Group for the corresponding periods and the accompanying notes thereto included in our Annual Reports on Form 20-F for the fiscal years ended June 30, 2011 and 2010, which are not incorporated by reference herein.

As permitted by AASB 2007-4 and IAS 31 “Interests in Joint Ventures” which became effective on July 1, 2007, the BHP Billiton Group recognizes its proportionate interests in the assets, liabilities, revenues and expenses of jointly controlled entities within each applicable line item of the financial statements.

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DESCRIPTION OF NOTES

The following description of the particular terms of the notes supplements the description of the general terms and provisions of the debt securities set forth in the attached prospectus. See “Description of Debt Securities That We May Offer” beginning on page 9 of the attached prospectus. To the extent the following description is inconsistent with that set forth in the attached prospectus, the following description replaces that in the attached prospectus.

General

The 20 fixed rate notes will be issued in an aggregate principal amount of US$             and will mature on         , 20         . The 20          fixed rate notes will be issued in an aggregate principal amount of US$             and will mature on         , 20        . The 20         fixed rate notes will be issued in an aggregate principal amount of US$             and will mature on         , 20         . The 20          fixed rate notes will be issued in an aggregate principal amount of US$             and will mature on         , 20         . The 20          fixed rate notes will be issued in an aggregate principal amount of US$             and will mature on         , 20         . The 20         floating rate notes will be issued in an initial aggregate principal amount of US$             and will mature on         , 20         . Book-entry interests in the notes will be issued in minimum denominations of US$2,000 and in integral multiples of US$1,000. The notes and guarantees will be governed by New York law.

The notes will be unsecured, unsubordinated indebtedness of BHP Billiton Finance (USA) Limited and will rank equally with all of the issuer’s other unsecured and unsubordinated indebtedness from time to time outstanding.

BHP Billiton Plc and BHP Billiton Limited each will unconditionally guarantee on an unsubordinated basis the due and punctual payment of interest on and principal of the notes, when and as any such payments become due and payable, whether at maturity, upon redemption or declaration of acceleration, or otherwise. The guarantees of the notes will be unsecured, unsubordinated obligations of BHP Billiton Plc and BHP Billiton Limited. The guarantees will rank equally with all other unsecured and unsubordinated indebtedness of BHP Billiton Plc and BHP Billiton Limited from time to time outstanding. Because BHP Billiton Plc and BHP Billiton Limited are holding companies, the notes will effectively be subordinated to any indebtedness of each of their subsidiaries.

The corporate trust office of the trustee in the City of New York is currently designated as the principal paying agent. We may at any time designate additional paying agents or rescind the designation of paying agents or approve a changing in the office through which any paying agent acts.

Payment of principal of and interest on the notes, so long as the notes are represented by global notes, as discussed below, will be made in immediately available funds. Beneficial interests in the global notes will trade in the same-day funds settlement system of The Depository Trust Company (DTC) and secondary market trading activity in such interests will therefore settle in same-day funds.

Interest

Fixed rate notes

The 20         fixed rate notes will bear interest at a rate of         % per annum, the 20          fixed rate notes will bear interest at a rate of         % per annum, the 20         fixed rate notes will bear interest at a rate of         % per annum, the 20         fixed rate notes will bear interest at a rate of         % per annum, and the 20         fixed rate notes will bear interest at a rate of         % per annum, in each case, payable semi-annually in arrears on              and              of each year, commencing             , 2013. The regular record dates for payments of interest will be              and             . Interest on the notes will be computed on the basis of a 360-day year of twelve 30-day

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months. If any interest payment date falls on a date that is not a Business Day, interest will be paid on the next Business Day with the same force and effect as if made on such interest payment date. “Business Day” means each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in that place of payment or in New York City or in London are authorized or obligated by law or executive order to close.

20         floating rate notes

The floating rate notes will bear interest at a rate per annum, reset quarterly, equal to LIBOR plus         %, as determined by the calculation agent (the “calculation agent”), which shall initially be The Bank of New York Mellon. The first interest period will be short and will bear interest at a rate of         %, which is based upon a linear interpolation between 2-month USD LIBOR and 3-month USD LIBOR plus         %. Interest on the 20         floating rate notes is payable quarterly in arrears on             ,             , and             , commencing             , 2013. The regular record dates for payments of interest will be the close of business the 15th calendar day preceding the interest payment date. Interest on the floating rate notes will be computed on the basis of a 360-day year and the actual number of days in the Interest Period in which it accrues. If any interest payment date falls on a day that is not a Business Day, interest will be paid on the next succeeding Business Day unless such Business Day falls in the next succeeding calendar month, in which case payment will be made on the Business Day immediately preceding such interest payment date.

Set forth below is a summary of certain of the defined terms of the 20         floating rate notes:

“Determination Date,” with respect to an Interest Period, will be the second London Banking Day preceding the first day of such Interest Period.

“Interest Period” means the period commencing on and including an interest payment date and ending on and including the day immediately preceding the next succeeding interest payment date, with the exception that the first Interest Period shall commence on and include the issue date and end on and include         , 2013.

“LIBOR,” with respect to any Interest Period, will be the rate (expressed as a percentage per annum) for deposits in U.S. dollars for a three-month period beginning on the second London Banking Day after the Determination Date that appears on Reuters LIBOR01 Page as of 11:00 a.m., London time, on the Determination Date. If Reuters LIBOR01 Page does not include such a rate or is unavailable on a Determination Date, the calculation agent will request the principal London office of each of four major banks in the London interbank market, as selected by the calculation agent (at the written direction of the issuer), to provide such bank’s offered quotation (expressed as a percentage per annum), as of approximately 11:00 a.m., London time, on such Determination Date, to prime banks in the London interbank market for deposits in a Representative Amount in U.S. dollars for a three-month period beginning on the second London Banking Day after the Determination Date. If at least two such offered quotations are so provided, the rate for the Interest Period will be the arithmetic mean of such quotations. If fewer than two such quotations are so provided, the calculation agent will request each of three major banks in New York City, as selected by the calculation agent (at the written direction of the issuer), to provide such bank’s rate (expressed as a percentage per annum), as of approximately 11:00 a.m., New York City time, on such Determination Date, for loans in a Representative Amount in U.S. dollars to leading European banks for a three-month period beginning on the second London Banking Day after the Determination Date. If at least two such rates are so provided, the rate for the Interest Period will be the arithmetic mean of such rates. If fewer than two such rates are so provided, then the rate for the Interest Period will be the rate in effect with respect to the immediately preceding Interest Period.

“London Banking Day” is any day on which dealings in U.S. dollars are transacted or, with respect to any future date, are expected to be transacted in the London interbank market.

“Representative Amount” means a principal amount of not less than US$1,000,000 for a single transaction in the relevant market at the relevant time.

“Reuters LIBOR01 Page” means the display so designated on the Reuters 3000 Xtra (or such other page as may replace that page on that service, or such other service as may be nominated as the information vendor, for the purpose of displaying rates or prices comparable to the London Interbank Offered rate for U.S. dollar deposits).

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All percentages resulting from any of the above calculations will be rounded, if necessary, to the nearest one hundred thousandth of a percentage point, with five one-millionths of a percentage point being rounded upwards (e.g., 9.876545% (or .09876545) being rounded to 9.87655% (or .0987655)) and all dollar amounts used in or resulting from such calculations will be rounded to the nearest cent (with one-half cent being rounded upwards).

The interest rate on the 20         floating rate notes will in no event be higher than the maximum rate permitted by New York law as the same may be modified by United States law of general application.

The calculation agent will, upon the request of the holder of any 20         floating rate note, provide the interest rate then in effect with respect to that note. All calculations made by the calculation agent in the absence of manifest error will be conclusive for all purposes and binding on the issuer, the guarantors and the holders of the 20         floating rate notes.

Optional make-whole redemption

We may redeem any series of the fixed rate notes in whole or in part, at our option at any time and from time to time at a redemption price equal to the greater of (i) 100% of the principal amount of the notes to be redeemed and (ii) as certified to the trustee by us, the sum of the present values of the Remaining Scheduled Payments discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate plus a spread of          basis points in the case of the 20         fixed rate notes,          basis points in the case of the 20         fixed rate notes,          basis points in the case of the 20         fixed rate notes,          basis points in the case of the 20         fixed rate notes and          basis points in the case of the 20         fixed rate notes, together with accrued interest on the principal amount of the notes to be redeemed to the date of redemption. In connection with such optional redemption the following defined terms apply:

“Treasury Rate” means, with respect to any redemption date, the rate per annum equal to the semi-annual equivalent yield to maturity (computed as of the third Business Day immediately preceding that redemption date) of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for that redemption date.

“Comparable Treasury Issue” means the United States Treasury security selected by the Independent Investment Banker that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the relevant series of notes.

“Independent Investment Banker” means one of the Reference Treasury Dealers appointed by us to act as the “Independent Investment Banker”.

“Comparable Treasury Price” means, with respect to any redemption date, (i) the average of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) on the third Business Day preceding that redemption date, as set forth in the daily statistical release (or any successor release) published by the Federal Reserve Bank of New York and designated “Composite 3:30 p.m. Quotations for U.S. Government Securities” or (ii) if such release (or any successor release) is not published or does not contain such prices on such Business Day, (A) the average of the Reference Treasury Dealer Quotations for that redemption date, after excluding the highest and lowest of such Reference Treasury Dealer Quotations, or (B) if the Independent Investment Banker for the notes obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such Quotations.

“Reference Treasury Dealer” means each of Barclays Capital Inc., Goldman, Sachs & Co. and J.P. Morgan Securities LLC, and, in each case, their respective successors and one other nationally recognized investment banking firm that is a Primary Treasury Dealer specified from time to time by us, provided, however, that if any of the foregoing shall cease to be a primary U.S. Government securities dealer in New York City (a “Primary Treasury Dealer”), we shall substitute therefor another nationally recognized investment banking firm that is a Primary Treasury Dealer.

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“Reference Treasury Dealer Quotation” means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Independent Investment Banker by such Reference Treasury Dealer at 3:30 p.m., New York City time, on the third Business Day preceding that redemption date.

“Remaining Scheduled Payments” means, with respect to each note to be redeemed, the remaining scheduled payments of the principal thereof and interest thereon that would be due after the related redemption date but for such redemption, provided, however, that, if that redemption date is not an interest payment date with respect to such notes, the amount of the next succeeding scheduled interest payment thereon will be reduced by the amount of interest accrued thereon to that redemption date.

Notice of any redemption will be mailed at least 30 days but not more than 60 days before the redemption date to each holder of the notes to be redeemed. On and after any redemption date, interest will cease to accrue on the notes or any portion thereof called for redemption. On or before any redemption date, we shall deposit with a paying agent (or the trustee) money sufficient to pay the redemption price of and accrued interest on the notes to be redeemed on such date. If less than all of a series of notes is to be redeemed, the notes to be redeemed shall be selected by the trustee by such method as the trustee shall deem fair and appropriate. The redemption price shall be calculated by the Independent Investment Banker and us, and the trustee and any paying agent for the notes shall be entitled to rely on such calculation.

Tax redemption

In the event of various tax law changes after the date of this prospectus supplement and other limited circumstances that would require us to pay additional amounts as described in the attached prospectus on page 18 under “Description of Debt Securities That We May Offer—Special Situations—Payment of Additional Amounts”, BHP Billiton Finance (USA), BHP Billiton Plc or BHP Billiton Limited may call all, but not less than all, of the notes for redemption. This means we may repay the notes prior to the stated maturity date of the notes. Our ability to redeem the notes is discussed in greater detail on page 17 of the attached prospectus under “Description of Debt Securities That We May Offer—Special Situations—Optional Tax Redemption”. If we call the notes as a result of such tax law changes, we must pay 100% of their principal amount. We will also pay the holders accrued interest if we have not otherwise paid interest through, but not including, the redemption date. Notes will stop bearing interest on the redemption date, even if the holders do not collect their money.

In either of the situations discussed above, we will give notice to DTC of any redemption we propose to make at least 30 days, but not more than 60 days, before the redemption date. Notice by DTC to participating institutions and by these participants to street name holders of indirect interests in the notes will be made according to arrangements among them and may be subject to statutory or regulatory requirements.

Defeasance and discharge

We may release ourselves from any payment or other obligations on the notes as described under “Description of Debt Securities That We May Offer—Defeasance and Covenant Defeasance—Defeasance and Discharge” on page 23 of the attached prospectus.

Trustee

The trustee under the indenture governing the notes is The Bank of New York Mellon. See “Description of Debt Securities That We May Offer” on page 9 in the attached prospectus for a description of the trustee’s duties generally and the procedures and remedies available to it in the event of a default under the notes.

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MATERIAL TAX CONSIDERATIONS

European Union Savings Directive

We have been advised that the Council of the European Union has adopted a Directive regarding the taxation of savings income (European Council Directive 2003/48/EC, the “Directive”). Under the Directive, Member States are required to provide to the tax authorities of another Member State information regarding payments of interest or other similar income paid by a person within their jurisdiction to, or collected by such a person for, an individual resident or certain limited types of entities established, in that other Member State. However, Luxembourg and Austria will instead (unless during that period they elect otherwise) operate a withholding system for a transitional period in relation to those payments, the ending of such transitional period being dependent upon the conclusion of certain other agreements relating to information exchange with certain other countries. A number of non-EU countries and territories have agreed to adopt similar measures (some of which involve a withholding system). Luxembourg has announced that it will no longer apply the withholding system as from January 1, 2015, and will exchange information automatically under the Directive. On November 13, 2008, the European Commission published a proposal for amendments to the Directive and the European Parliament approved an amended version of this proposal on April 24, 2009. If implemented, the suggested changes would broaden the scope of the requirements described above. Holders should consult their tax advisors regarding the implications of the Directive in their particular circumstances.

The Proposed Financial Transactions Tax (“FTT”)

The European Commission has published a proposal for a directive for a common FTT in Belgium, Germany, Estonia, Greece, Spain, France, Italy, Austria, Portugal, Slovenia and Slovakia (the “participating Member States”).

The proposed FTT has very broad scope and could, if introduced in its current form, apply to certain dealings in the debt securities (including secondary market transactions) in certain circumstances. The issue and subscription of debt securities should, however, be exempt.

Under current proposals the FTT could apply in certain circumstances to persons both within and outside of the participating Member States. Generally, it would apply to certain dealings in the debt securities where at least one party is a financial institution, and at least one party is established in a participating Member State. A financial institution may be, or be deemed to be, “established” in a participating Member State in a broad range of circumstances, including (a) by transacting with a person established in a participating Member State or (b) where the financial instrument which is subject to the dealings is issued in a participating Member State.

The FTT proposal remains subject to negotiation between the participating Member States, and is the subject of legal challenge and a reported non-binding adverse opinion expressed by the legal service of the Council of the European Union. It may therefore be altered prior to any implementation, the timing of which remains unclear. Additional EU Member States may decide to participate. Prospective holders of the debt securities are advised to seek their own professional advice in relation to the FTT.

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UNDERWRITING

We have entered into an underwriting agreement dated September             , 2013 relating to the notes and the guarantees with the underwriters for the offering named below (for whom Barclays Capital Inc., Goldman, Sachs & Co. and J.P. Morgan Securities LLC are acting as representatives). Subject to certain conditions, each underwriter has severally and not jointly agreed to purchase the principal amounts of the notes indicated in the following table at the price to investors less the underwriters’ discount set forth on the cover page of this prospectus supplement.

Barclays Capital Inc., Goldman, Sachs & Co. and J.P. Morgan Securities LLC are the joint book-runners for the offering of the notes.

The underwriting agreement provides that the obligations of the several underwriters to purchase the notes included in this offering are subject to certain conditions.

The underwriters are obligated to purchase all the notes if they purchase any of the notes. The underwriting agreement does not provide for any increase in the aggregate principal amount of the notes being offered in this offering. However, we may issue further notes. See the section entitled “Description of Debt Securities That We May Offer—Default and Related Matters—Further Issues” on page 25 in the attached prospectus.

The issuer and the guarantors have jointly and severally agreed to indemnify the several underwriters against various liabilities, including liabilities under the Securities Act of 1933.

The distribution

We have been advised by the underwriters that they propose initially to offer the notes to the public at the prices to investors set forth on the cover page of this prospectus supplement. After the initial public offering, the prices to investors may be changed by the underwriters at their own initiative. The offering of the notes by the underwriters is subject to the underwriters’ right to reject any order in whole or in part.

Purchasers of the notes may be required to pay stamp taxes and other charges in accordance with the laws and practices of the country of purchase in addition to the prices to investors set forth on the cover page of this prospectus supplement.

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No assurance can be given as to the liquidity of, or the trading markets for, the notes. We have been advised by the underwriters that they intend to make a market in the notes, but they are not obligated to do so and may discontinue such market-making at any time without notice.

In connection with the offering, the underwriters may purchase and sell notes in the open market. These transactions may include over-allotment, syndicate covering transactions and stabilizing transactions. Over-allotment involves syndicate sales of notes in excess of the principal amount of notes to be purchased by the underwriters in this offering, which creates a syndicate short position. Syndicate covering transactions involve purchases of the notes in the open market after the distribution has been completed in order to cover syndicate short positions. Stabilizing transactions consist of certain bids or purchases of notes made for the purpose of preventing or retarding a decline in the market price of the notes while the offering is in progress.

The underwriters also may impose a penalty bid. This occurs when a particular underwriter repays to the underwriters a portion of the underwriting discount received by it because the representatives have repurchased notes sold by or for the account of such underwriter in stabilizing or short covering transactions.

These activities by the underwriters may stabilize, maintain or otherwise affect the market price of the notes. As a result, the prices of the notes may be higher than the price that otherwise might exist in the open market. If the underwriters commence these activities, they may discontinue the activities at any time. These transactions may be effected in the over-the-counter market or otherwise.

We estimate that our share of the total expenses of the offering, excluding underwriting discounts, will be approximately US$500,000.

The underwriters and their respective affiliates are full service financial institutions engaged in various activities, which may include sales and trading, commercial and investment banking, advisory, investment management, investment research, principal investment, hedging, market making, brokerage and other financial and non-financial activities and services. Certain of the underwriters and their respective affiliates have provided, and may in the future provide, a variety of these services to us and to persons and entities with relationships with us for which they received or will receive customary fees and expenses.

In the ordinary course of their various business activities, the underwriters and their respective affiliates, officers, directors and employees may purchase, sell or hold a broad array of investments and actively trade securities, derivatives, loans, commodities, currencies, credit default swaps and other financial instruments for their own account and for the accounts of their customers, and such investment and trading activities may involve or relate to assets, securities and/or instruments of the issuer (directly, as collateral securing other obligations or otherwise) and/or persons and entities with relationships with us. The underwriters and their respective affiliates may also communicate independent investment recommendations, market color or trading ideas and/or publish or express independent research views in respect of such assets, securities or instruments and may at any time hold, or recommend to clients that they should acquire, long and/or short positions in such assets, securities and instruments.

No prospectus or other disclosure document in relation to the notes has been lodged with the Australian Securities and Investments Commission or the Australian Securities Exchange Limited. Each underwriter has represented and agreed that it:

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Each of the underwriters has severally represented, warranted and agreed that:

This prospectus supplement is not a prospectus for the purpose of the Prospectus Directive.

In relation to each Member State of the European Economic Area which has implemented the Prospectus Directive (each, a Relevant Member State), each underwriter has represented and agreed that with effect from and including the date on which the Prospectus Directive is implemented in the Relevant Member State (the Relevant Implementation Date) it has not made and will not make an offer of notes which are the subject of the offering contemplated by this prospectus supplement to the public in that Relevant Member State other than:

provided that no such offer of notes shall require the issuer, the guarantors or any underwriter to publish a prospectus pursuant to Article 3 of the Prospectus Directive.

None of the issuer, the guarantors or the underwriters have authorized, nor do they authorize, the making of any offer of the notes in circumstances in which an obligation arises for the issuer, the guarantors or the underwriters to publish a prospectus for such offer.

For the purposes of this provision, the expression “offer of the notes to the public” in relation to any of the notes in any Relevant Member State means the communication in any form and by any means of sufficient information on the terms of the offer and the notes to be offered so as to enable an investor to decide to purchase or subscribe the notes, as the same may be varied in that member state by any measure implementing the Prospectus Directive in that Member State, the expression “Prospectus Directive” means Directive 2003/71/EC (and amendments thereto, including the 2010 PD Amending Directive, to the extent implemented in the Relevant Member State), and includes any relevant implementing measure in each Relevant Member State and the expression “2010 PD Amending Directive” means Directive 2010/73/EU.

Barclays Capital Inc., Goldman, Sachs & Co. and J.P. Morgan Securities LLC have agreed, severally and not jointly, that they will offer the notes (i) to at least 10 persons, each of whom is carrying on a business of providing finance or investing or dealing in securities in the course of operating in a financial market, and is not known or suspected to be an associate (as defined in section 128F(9) of the Income Tax Assessment Act 1936 of Australia (Australian Tax Act)) of any other persons to whom the offer is made by the underwriter under this

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section; or (ii) in such other manner as which satisfies section 128F(3) of the Australian Tax Act. Such offers will be made within 30 days of Barclays Capital Inc., Goldman, Sachs & Co. and J.P. Morgan Securities LLC being unconditionally obliged to offer the notes for sale.

Each underwriter has represented and warranted that it is and will be acting as an underwriter in the course of carrying on a business of providing finance, or investing or dealing in securities in the course of operating in financial markets.

Each underwriter has represented and agreed that, in connection with the primary distribution of the notes, it will not (directly or indirectly) sell notes to any person if, at the time of such sale, the employees of the underwriter who are involved in making the offer, effecting the sale or otherwise directly involved in the sale knew or had reasonable grounds to suspect that, as a result of such sale, any notes (or an interest in any notes) was being, or would be, acquired (directly or indirectly) by an Offshore Associate (as defined below) other than in the capacity of a dealer, manager or underwriter in relation to the placement of those notes or in the capacity of a clearing house, custodian, funds manager or responsible entity of an Australian registered scheme. For the avoidance of doubt, if the relevant employees of an underwriter do not know, or do not have reasonable grounds to suspect, that a person is an associate of the issuer or one of the guarantors, nothing in this paragraph obliges that underwriter to make positive inquiries of that person to confirm that person is not an Offshore Associate. In this paragraph, “Offshore Associate” means an associate (as defined in section 128F(9) of the Australian Tax Act) of the issuer or one of the guarantors that is either a non-resident of Australia that does not acquire the notes in carrying on a business at or through a permanent establishment in Australia, or a resident of Australia that acquires the notes at or through a permanent establishment outside Australia.

The notes are offered in a global offering for sale in those jurisdictions in the United States, the European Economic Area, Australia and elsewhere where it is lawful to make such offers.

We are not aware that any of our major shareholders, directors or executive officers intend to subscribe for notes in this offering or that any person intends to subscribe for more than 5% of the aggregate principal amount of the notes offered in this offering.

The addresses of the joint book-runners are: Barclays Capital Inc., 745 Seventh Avenue, New York, New York 10019, Goldman, Sachs & Co., 200 West Street, New York, New York 10282 and J.P. Morgan Securities LLC, 383 Madison Avenue, New York, New York 10179.

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LEGAL MATTERS

The validity of the notes and guarantees will be passed upon for the BHP Billiton Group by Sullivan & Cromwell, Melbourne, Australia as to certain matters of New York law and by Sullivan & Cromwell LLP, London, England as to certain matters of English law. The validity of the notes and guarantees will be passed upon for the BHP Billiton Group by internal legal counsel to the BHP Billiton Group as to certain matters of Australian law. Internal legal counsel to the BHP Billiton Group will also pass upon certain other matters relating to the notes and guarantees as a matter of English law.

Certain legal matters relating to the offering will be passed upon for the underwriters by Sidley Austin, Sydney, Australia.

EXPERTS

The consolidated financial statements of the BHP Billiton Group as of June 30, 2013 and 2012, and for each of the years in the three-year period ended June 30, 2013 and management’s assessment of the effectiveness of internal control over financial reporting as of June 30, 2013 have been incorporated by reference herein and in the registration statement in reliance upon the reports of KPMG Audit Plc, independent registered public accounting firm, United Kingdom, and KPMG, independent registered public accounting firm, Australia, incorporated by reference herein, and upon the authority of such firms as experts in accounting and auditing.

LIMITATION ON INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM’S LIABILITY

The liability of KPMG Australia in relation to the performance of their professional services to BHP Billiton Limited including, without limitation, KPMG Australia’s audits of our financial statements described under “Experts”, is limited under the Institute of Chartered Accountants in Australia (NSW) Scheme approved under the Professional Standards Act of 1994 (NSW), including the Treasury Legislation Amendment (Professional Standards) Act (the “Accountants Scheme”). The Accountants Scheme limits the civil liability of KPMG Australia to ten times reasonable fees for the service up to $75 million. The Accountants Scheme does not limit liability for breach of trust, fraud or dishonesty.

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PROSPECTUS

Debt Securities

BHP Billiton Finance (USA) Limited

Fully and unconditionally guaranteed by

BHP Billiton Limited

and

BHP Billiton Plc

BHP Billiton Finance (USA) Limited may sell debt securities to the public from time to time in one or more series.

The debt securities will be issued by BHP Billiton Finance (USA) Limited and will be guaranteed by each of BHP Billiton Limited, an Australian corporation, and BHP Billiton Plc, an English public limited company.

We urge you to read this prospectus and the attached prospectus supplement, which will describe the specific terms of the debt securities, carefully before you make your investment decision. We may sell these securities to or through underwriters as well as to other purchasers or through agents. The names of the underwriters or agents will be included in the prospectus supplement.

See “Risk Factors” beginning on page 1 for a discussion of material risks that you should consider before investing in the debt securities.

Neither the Securities and Exchange Commission nor any other regulatory body has approved or disapproved of these securities, or passed upon the accuracy or adequacy of this prospectus. Any representation to the contrary is a criminal offence.

This prospectus may not be used to sell securities unless it is accompanied by a prospectus supplement.

The date of this prospectus is September 18, 2012.

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RISK FACTORS

Investing in the debt securities offered by this prospectus involves risk. We have set forth risk factors relating to our business in our most recent annual report on Form 20-F, which is incorporated by reference in this prospectus. We also set forth below certain additional risk factors that relate specifically to the securities we may offer using this prospectus. We may include further risk factors in more recent reports on Form 6-K incorporated in this prospectus by reference or in a prospectus supplement.

You should carefully consider all of these risks, as well as the other information in, or incorporated by reference in, the prospectus and any prospectus supplement before you decide whether to buy the debt securities. If any of the situations described in these risks actually occurs, our business, financial condition and results of operations would likely suffer. In this case, any trading price of the debt securities could decline and you could lose all or part of your investment.

Risks relating to the Debt Securities

Since BHP Billiton Plc and BHP Billiton Limited are holding companies and conduct their operations through subsidiaries, your right to receive payments on the guarantees is subordinated to the other liabilities of their subsidiaries other than BHP Billiton Finance (USA).

BHP Billiton Plc and BHP Billiton Limited are organized as holding companies and substantially all of their operations are carried on through subsidiaries. Their principal source of income is the dividends and distributions they receive from their subsidiaries. The ability of BHP Billiton Plc and BHP Billiton Limited to meet their financial obligations is dependent upon the availability of cash flows from their subsidiaries and affiliated companies through dividends, intercompany advances, management fees and other payments. These subsidiaries and affiliated companies are not required and may not be able to pay dividends to BHP Billiton Plc and BHP Billiton Limited.

Claims of the creditors of the subsidiaries of BHP Billiton Plc and of the subsidiaries of BHP Billiton Limited have priority as to the assets of such subsidiaries over the claims of BHP Billiton Plc or BHP Billiton Limited. Consequently, on the insolvency of BHP Billiton Plc and BHP Billiton Limited and their respective subsidiaries, holders of debt securities issued by the issuer and guaranteed by BHP Billiton Plc and BHP Billiton Limited are structurally subordinated to the prior claims of the creditors of subsidiaries of BHP Billiton Plc and BHP Billiton Limited other than the issuer.

In addition, some of these subsidiaries are subject to laws restricting the amount of dividends they may pay. For example, these laws may prohibit dividend payments when net assets would fall below subscribed share capital, when the subsidiary lacks available profits or when the subsidiary fails to meet certain capital and reserve requirements. English law prohibits those subsidiaries incorporated in the United Kingdom from paying dividends unless these payments are made out of distributable profits. Australian law prohibits the payment of dividends unless the company’s assets exceed its liabilities immediately before the dividend is declared and the excess is sufficient for the payment of the dividend, the payment of the dividend is fair and reasonable to the company’s shareholders as a whole and the payment of the dividend does not materially prejudice the company’s ability to pay its creditors. Other statutory and general law obligations also affect the ability of directors of these subsidiaries to declare dividends and the ability of these subsidiaries to make payments to BHP Billiton Plc or BHP Billiton Limited on account of intercompany loans.

Since the debt securities are unsecured, your right to receive payments may be adversely affected.

The debt securities will be unsecured. At 30 June 2012, the BHP Billiton Group had US$1,707 million aggregate principal amount of secured indebtedness outstanding. If BHP Billiton Finance (USA) defaults on the debt securities or BHP Billiton Limited or BHP Billiton Plc defaults on the guarantees, or after the bankruptcy,

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liquidation or reorganization of any of them, then, to the extent that the issuer or the guarantors have granted security over their assets, the assets that secure those debts will be used to satisfy the obligations under that secured debt before any payment on the debt securities or the guarantees can be made. There may only be limited

assets available to make payments on the debt securities or the guarantees in the event of an acceleration of the debt securities. If there is not enough collateral to satisfy the obligations of the secured debt, then the remaining amounts on the secured debt would share equally with all unsubordinated unsecured indebtedness.

If the issuer defaults on the debt securities, or the guarantors default on the guarantees, your right to receive payments on the guarantees may be adversely affected by English or Australian insolvency laws.

BHP Billiton Plc is incorporated under the laws of England and Wales. Accordingly, insolvency proceedings with respect to BHP Billiton Plc would be likely to proceed under, and be governed by, English insolvency law. The procedural and substantive provisions of English insolvency laws generally are more favorable to secured creditors than comparable provisions of United States law. These provisions afford debtors and unsecured creditors only limited protection from the claims of secured creditors and it will generally not be possible for the guarantors, the issuer or other unsecured creditors to prevent or delay the secured creditors from enforcing their security to repay the debts due to them.

BHP Billiton Limited and BHP Billiton Finance (USA) are incorporated under the laws of the Commonwealth of Australia and, therefore, insolvency proceedings with respect to them would be likely to proceed under, and be governed by, Australian insolvency law. The procedural and substantive provisions of Australian insolvency laws are also generally more favorable to secured creditors than comparable provisions of United States law. These provisions afford debtors and unsecured creditors only limited protection from the claims of secured creditors and it will generally not be possible for the guarantors, the issuer or other unsecured creditors to prevent or delay the secured creditors from enforcing their security to repay the debts due to them.

There is no established trading market for the debt securities that BHP Billiton Finance (USA) is offering and one may not develop.

The debt securities will be new securities for which there currently is no established trading market. There is a risk regarding the future development of a market for the debt securities or the ability of holders of the debt securities to sell their debt securities or the price at which such holders may be able to sell their debt securities. If such a market were to develop, the debt securities could trade at prices that may be lower than the initial public offering price depending on many factors, including prevailing interest rates, BHP Billiton Group’s operating results and the market for similar securities. Therefore, there is a risk as to the liquidity of any trading market for the debt securities or that an active public market for the debt securities will not develop.

Since the issuer and the guarantors reside outside the United States and a substantial portion of their respective assets is located outside the United States, there is a risk that service of process, enforcement of judgments and bringing of original actions will be more difficult.

The issuer and BHP Billiton Limited are corporations organized under the laws of the Commonwealth of Australia. BHP Billiton Plc is a public limited company incorporated under the laws of England and Wales.

Substantially all the directors and officers of these companies, and some of the experts named in this document, reside outside the United States, principally in Australia and the United Kingdom. A substantial portion of the assets of these companies, and the assets of the directors, officers and experts, is located outside the United States. Therefore, you may not be able to effect service of process within the United States upon these companies or persons so that you may enforce judgments of United States courts against them based on the civil liability provisions of the United States federal securities laws. In addition, you may have difficulty bringing an original action in an Australian or United Kingdom court to enforce liabilities against any of these companies or any person described above based on U.S. federal securities laws.

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ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that we filed with the U.S. Securities and Exchange Commission (the “SEC”) using the “shelf” registration, or continuous offering, process. Under this shelf registration process, we may sell the debt securities described in this prospectus from time to time in one or more offerings.

This prospectus provides you with a general description of the debt securities we may offer. Each time we sell debt securities, we will provide a prospectus supplement containing specific information about the terms of the debt securities. The prospectus supplement may also add to, update or change information contained in this prospectus. If there is any inconsistency between the information in this prospectus and any prospectus supplement, you should rely on the information in that prospectus supplement. You should read both this prospectus and the applicable prospectus supplement together with the additional information described on page 3 under the heading “Where You Can Find More Information About the BHP Billiton Group.”

The registration statement containing this prospectus, including exhibits to the registration statement, provides additional information about us and the debt securities offered under this prospectus. The registration statement can be read at the SEC offices and its website as described under the heading “Where You Can Find More Information About the BHP Billiton Group.”

When acquiring any debt securities discussed in this prospectus, you should rely only on the information provided in this prospectus and in any prospectus supplement, including the information incorporated by reference (see the discussion on page 4 under the heading “Incorporation of Information We File with the SEC”). Neither we, nor any underwriters or agents, have authorized anyone to provide you with different information. We are not offering the debt securities in any jurisdiction where the offer is prohibited. You should not assume that the information in this prospectus, any prospectus supplement, or any document incorporated by reference, is truthful or complete at any date other than the date mentioned on the cover page of these documents.

We may sell the debt securities to underwriters who will sell the debt securities to the public on terms fixed at the time of sale. In addition, the debt securities may be sold by us directly or through dealers or agents we designate from time to time. If we, directly or through agents, solicit offers to purchase any debt securities, we reserve the right to accept and, together with our agents, to reject, partially or entirely, any of those offers.

An applicable prospectus supplement will contain the names of any underwriters, dealers or agents together with the terms of an offering of debt securities, the compensation of those underwriters, and the net proceeds to us. Any underwriters, dealers or agents participating in an offering of debt securities may be considered “underwriters” within the meaning of the U.S. Securities Act of 1933, as amended (the “Securities Act of 1933”).

In this prospectus, the terms “we,” “our,” “us,” “BHP Billiton” and “BHP Billiton Group” refer to BHP Billiton Limited and BHP Billiton Plc, together with their respective subsidiaries (including the issuer). BHP Billiton Plc Group refers to the group that is BHP Billiton Plc and its subsidiary companies. BHP Billiton Limited Group refers to the group that is BHP Billiton Limited and its subsidiary companies. “BHP Billiton Plc” refers to the parent entity that was formerly Billiton Plc before the implementation of the dual listed company structure and “BHP Billiton Limited” refers to the parent entity that was formerly BHP Limited before the dual listed company structure. We refer to BHP Billiton Finance (USA) Limited as BHP Billiton Finance (USA) or the issuer. We refer to BHP Billiton Limited and BHP Billiton Plc together as the guarantors.

WHERE YOU CAN FIND MORE INFORMATION ABOUT THE BHP BILLITON GROUP

BHP Billiton Limited and BHP Billiton Plc file annual and other reports and other information with the SEC. You may read and copy any document that either BHP Billiton Limited or BHP Billiton Plc files at the

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SEC’s public reference room located at 100 F Street, NE Washington, DC 20549. Please call the SEC at 1-800-SEC-0330 for further information on the public reference room. In addition, the SEC maintains an Internet site (www.sec.gov) that contains reports filed by us. American depositary shares representing ordinary shares of BHP Billiton Limited are listed on the New York Stock Exchange, and its ordinary shares are listed on the Australian Stock Exchange. American depositary shares representing ordinary shares of BHP Billiton Plc are listed on the New York Stock Exchange, and its ordinary shares are admitted to the Official List of the Financial Services Authority in its capacity as competent authority under the Financial Services Act 1986, referred to as the UK Listing Authority, and the London Stock Exchange Plc for trading on the London Stock Exchange’s market for listed securities. Such documents are not incorporated into this prospectus.

We will make available to the holders of debt securities, at the corporate trust office of the trustee under the indenture governing the debt securities, copies of the indenture as well as our most recent annual report on Form 20-F, including a review of operations, and annual audited consolidated financial statements prepared in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board, or IFRS. We will also make available at the corporate trust office of the trustee our semi-annual consolidated financial statements, prepared in accordance with IFRS.

INCORPORATION OF INFORMATION WE FILE WITH THE SEC

The SEC allows BHP Billiton Limited and BHP Billiton Plc to “incorporate by reference” the information each of them files or furnishes with the SEC. This permits BHP Billiton Limited and BHP Billiton Plc to disclose important information to you by referring you to these filed or furnished documents. Any information referenced in this way is considered part of this prospectus, and any information that we file or furnish with the SEC subsequent to this prospectus and incorporate by reference into this prospectus will automatically be deemed to update and supersede this information, as described in more detail below. We incorporate by reference the following documents that have been filed with the SEC:

We also incorporate by reference any future filings made with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the U.S. Securities Exchange Act of 1934, as amended (the “Securities Exchange Act of 1934”), including but not limited to any future report on Form 20-F of BHP Billiton Limited and BHP Billiton Plc, until we terminate the offering of securities contemplated by any prospectus supplement to this prospectus. In addition, we may incorporate by reference some future reports on Form 6-K, but only to the extent that the forms expressly state that we incorporate them by reference in this prospectus. Any statement contained herein, or in a document all or a portion of which is incorporated or deemed to be incorporated by reference herein, shall be deemed to be modified or superseded for purposes of the registration statement and this prospectus to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of the registration statement or this prospectus.

We will provide without charge, upon written or oral request, a copy of any or all of the documents incorporated by reference in this prospectus, other than exhibits which are specifically incorporated by reference in such documents. Requests should be directed to BHP Billiton, 180 Lonsdale Street, Melbourne, Victoria 3000, Australia, Telephone 011 61 3 9609 3333.

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

Some of the information contained or incorporated by reference in this prospectus and any prospectus supplement may constitute “forward-looking statements” (within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934), which are subject to various risks and uncertainties. These statements can be identified by the use of forward-looking terminology such as “intend,” “aim,” “project,” “anticipate,” “estimate,” “plan,” “believe” “expect,” “may,” “should,” “will,” “continue,” or other similar words. These statements discuss future expectations concerning the results of operations or financial condition, or provide other forward looking statements. Our actual results, performance or achievements could be significantly different from the results expressed in, or implied by, those forward-looking statements. You should not place undue reliance on any forward looking statement, which speaks only as of the date made.

These statements include, but are not limited to, the information regarding:

These forward looking statements are not guarantees or predictions of future performance, and involve known and unknown risks, uncertainties and other factors, many of which are beyond our control, and which may cause actual results to differ materially from those expressed in the statements contained in this prospectus. When considering these forward-looking statements, you should keep in mind the cautionary statements contained or incorporated by reference in this prospectus. These statements describe circumstances that could cause actual results to differ materially from those contained in any forward looking statement.

For example, our future revenues from our operations, projects or mines described in this prospectus and the attached prospectus supplement (including the documents incorporated by reference herein or therein) will be based, in part, upon the market price of the minerals, metals or petroleum produced, which may vary significantly from current levels. These variations, if materially adverse, may affect the timing or the feasibility of the development of a particular project or the expansion of certain facilities or mines. Other factors that may affect the actual construction or production commencement dates, costs or production output and anticipated lives of operations, mines or facilities include our ability to profitably produce and transport the minerals, petroleum and/or metals extracted to applicable markets; the impact of foreign currency exchange rates on the market prices of the minerals, petroleum or metals we produce; activities of government authorities in some of the countries where we are exploring or developing these projects, facilities or mines, including increases in taxes, changes in environmental and other regulations and political uncertainty; and other factors identified in the description of the risk factors described elsewhere in this prospectus (including the documents incorporated by reference). We cannot assure you that our estimated economically recoverable reserve figures, closure or divestment of such operations or facilities, including associated costs, actual production or commencement dates, cost or production output, or anticipated lives of the projects, mines and facilities discussed in this prospectus will not differ materially from the statements contained in this prospectus.

Except as required by applicable regulations or by law, we do not undertake any obligation to publicly update or review any forward looking statements, whether as a result of new information or future events.

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THE BHP BILLITON GROUP

We are BHP Billiton, a leading global resources company. Our purpose is to create long-term shareholder value through the discovery, acquisition, development and marketing of natural resources.

Our strategy is to own and operate large, long-life, low-cost, expandable, upstream assets diversified by commodity, geography and market.

This strategy means more predictable business performance over time which, in turn, underpins the creation of value for our shareholders, customers, employees and, importantly, the communities in which we operate.

We are among the world’s top producers of major commodities, including aluminum, energy coal, metallurgical coal, copper, manganese, iron ore, uranium, nickel and silver and have substantial interests in oil and gas.

The Group is headquartered in Melbourne, Australia, and consists of the BHP Billiton Limited Group and the BHP Billiton Plc Group as a combined enterprise, following the completion of the Dual Listed Company (DLC) merger in June 2001.

BHP Billiton Limited and BHP Billiton Plc have each retained their separate corporate identities and maintained their separate stock exchange listings, but they are operated and managed as a single unified economic entity, with their boards and senior executive management comprising the same people.

BHP Billiton Limited has a primary listing on the Australian Securities Exchange (ASX) in Australia and BHP Billiton Plc has a premium listing on the UK Listing Authority’s Official List and its ordinary shares are admitted to trading on the London Stock Exchange (LSE) in the United Kingdom. BHP Billiton Plc also has a secondary listing on the Johannesburg Stock Exchange in South Africa. In addition, BHP Billiton Limited American Depository Receipts (ADRs) and BHP Billiton Plc ADRs trade on the New York Stock Exchange (NYSE) in the United States.

As at June 30, 2012, we had a market capitalization of approximately US$160.6 billion. For the fiscal year ended June 30, 2012, we reported net operating cash flow of US$24.384 billion, profit attributable to shareholders of US$15.417 billion and revenue of US$72.226 billion. We have approximately 125,000 employees and contractors working in more than 100 locations worldwide.

We operate eight businesses, called Customer Sector Groups (CSGs):

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BHP BILLITON FINANCE (USA) LIMITED

BHP Billiton Finance (USA) Limited, a corporation organized under the laws of the Commonwealth of Australia, is a wholly-owned finance subsidiary of BHP Billiton Limited. BHP Billiton Finance (USA) Limited was formed for the purpose of borrowing on behalf of the BHP Billiton Group and advancing the net proceeds of such borrowings to members of the BHP Billiton Group. The principal executive offices of BHP Billiton Finance (USA) Limited are located at 180 Lonsdale Street, Melbourne, Victoria 3000, Australia. The issuer’s telephone number is 011 61 3 9609 3333.

BHP Billiton Finance (USA) is empowered under its Constitution to borrow or raise money in such manner as it sees fit and in particular by the issue of debentures or other securities, such as the debt securities.

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RATIO OF EARNINGS TO FIXED CHARGES

Shown below is the ratio of earnings to fixed charges for the BHP Billiton Group for the periods indicated.

We computed the ratio of earnings to fixed charges by dividing the amount of earnings by the amount of fixed charges. For the purposes of calculating this ratio, we have calculated earnings by adding pre-tax income before adjustment for minority interests in consolidated subsidiaries or income or loss from equity investees, fixed charges and distributed income of equity investees. Interest capitalized and the minority interest in pre-tax income of subsidiaries that have not incurred fixed charges were subtracted from the total of the added items. Fixed charges consist of interest costs, both expensed and capitalized, a reasonable approximation of the interest component of rental expense and pre-tax earnings required to cover any preferred stock dividend requirements.

USE OF PROCEEDS

Unless otherwise indicated in an accompanying prospectus supplement, BHP Billiton Finance (USA) intends to lend the net proceeds from the sale of any debt securities sold under this prospectus to BHP Billiton Limited, which will use such proceeds for general corporate purposes, including retirement of existing debt.

ENFORCEMENT OF CIVIL LIABILITIES

The issuer is a corporation organized under the laws of the Commonwealth of Australia. BHP Billiton Plc is a public limited company incorporated under the laws of England and Wales. BHP Billiton Limited is a corporation organized under the laws of the Commonwealth of Australia. Substantially all the directors and officers of these companies, and some of the experts named in this document, reside outside the United States, principally in Australia and the United Kingdom. A substantial portion of the assets of these companies, and the assets of the directors, officers and experts, is located outside the United States. Therefore, you may not be able to effect service of process within the United States upon these companies or persons so that you may enforce judgments of United States courts against them based on the civil liability provisions of the United States federal securities laws. In addition, there are doubts as to the ability of an investor to bring an original action in an Australian or United Kingdom court to enforce liabilities against us or any person based on U.S. federal securities laws.

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DESCRIPTION OF DEBT SECURITIES THAT WE MAY OFFER

General

The following is a summary of the general terms of the debt securities. Each time that we issue debt securities, we will file a prospectus supplement with the SEC, which prospectus supplement will be attached to this prospectus. You should read that prospectus supplement carefully. The prospectus supplement may contain additional terms of those debt securities.

The terms presented here, together with the terms contained in the prospectus supplement, will be a description of the material terms of the debt securities being offered to you. If there is any inconsistency between the terms presented here and those in the prospectus supplement, however, the terms in the prospectus supplement will apply and will replace those presented here.

As required by federal law of the United States for all bonds and notes of companies that are publicly offered, the debt securities are governed by a document called an indenture, which you should read. The indenture relating to debt securities issued by BHP Billiton Finance (USA) is a contract, dated April 17, 2003, among BHP Billiton Finance (USA), BHP Billiton Limited, BHP Billiton Plc and The Bank of New York Mellon (as successor to Citibank N.A.). The terms of the debt securities include those stated in the indenture and those made part of the indenture by reference to the U.S. Trust Indenture Act of 1939. We have filed the indenture with the SEC as an exhibit to the registration statement of which this prospectus is a part.

We may issue as many distinct series of debt securities under the indenture as we wish. This section summarizes terms of the debt securities that are common to all series. Most of the financial terms and other specific terms of your debt securities are described in the prospectus supplement attached to this prospectus. Those terms may vary from the terms described here.

The relevant prospectus supplement for any particular series of the debt securities will describe the following terms of debt securities offered (to the extent not described in this prospectus or to the extent different from this prospectus):

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The Bank of New York Mellon, whose offices are located at 101 Barclay Street, New York, New York 10286, acts as the trustee under the indenture. The trustee has two principal functions:

Both BHP Billiton Plc and BHP Billiton Limited act as the guarantors of the debt securities issued under the indenture. The guarantees are described under “Guarantees” below.

The indenture and its associated documents contain the full legal text of the matters described in this section. The indenture, the debt securities and the guarantees are governed by New York law. A copy of the form of indenture is filed with the SEC as an exhibit to the registration statement of which this prospectus forms a part. See the section entitled “Where You Can Find More Information About the BHP Billiton Group” for information on how to obtain a copy.

Because this section is a summary, it does not describe every aspect of the debt securities or the guarantees. This summary is subject to and qualified in its entirety by reference to all the provisions of the indenture, including some of the terms used in the indenture. We describe the meaning for only the more important terms.

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We also include references in parentheses to some sections of the indenture. Whenever we refer to particular sections or defined terms of the indenture in this prospectus, those sections or defined terms are incorporated by reference here.

Stated Maturity and Maturity

The day on which the principal amount of the debt securities is scheduled to become due is called the stated maturity of the principal. The principal may become due sooner, by reason of redemption or acceleration after a default. The day on which the principal actually becomes due, whether at the stated maturity or earlier, is called the maturity of the principal. The terms “stated maturity” and “maturity” refer to the dates when interest payments become due. For example, reference to a regular interest payment date when an installment of interest is scheduled to become due is the “stated maturity” of that installment. When reference is made to the “stated maturity” or the “maturity” of the debt securities without specifying a particular payment, it refers to the stated maturity or maturity, as the case may be, of the principal. The debt securities are subject to defeasance as described below under “Defeasance and Covenant Defeasance.”

The issuer will pay interest on the debt securities on the interest payment dates specified in the related prospectus supplement, and at maturity. Each payment of interest due on an interest payment date or at maturity will include interest accrued from and including the last date to which interest has been paid or made available for payment, or from the issue date, if none has been paid or made available for payment, to but excluding the relevant payment date on the debt securities on the basis of a 360-day year of twelve 30-day months.

How the Debt Securities Rank Against Other Debt

The debt securities will not be secured by any of the issuer’s or the guarantors’ property or assets. Thus, by owning these debt securities, holders are one of the issuer’s unsecured creditors. These debt securities will not be subordinated or senior to any of the issuer’s other unsecured unsubordinated debt obligations. The guarantees will be unsecured obligations of each of BHP Billiton Limited and BHP Billiton Plc and will rank equally as to payment with all their other unsecured and unsubordinated debt, except debt given preference by law. These guarantees will not be subordinated or senior to any of the guarantors’ other unsecured unsubordinated debt obligations. This means that, in a bankruptcy or liquidation proceeding against the issuer or the guarantors, the issuer’s obligations under these debt securities and the guarantors’ obligation under the guarantees would rank equally in right of payment with all of the issuer’s and the guarantors’ other unsecured and unsubordinated debt, respectively, except debt given preference by law.

Since most of the guarantors’ operations are conducted by their subsidiaries, they are largely dependent on cash from their subsidiaries for the payment of principal and interest, and additional amounts, if any, pursuant to the guarantees. You should note that there are no limitations on subsidiary companies taking on additional debt other than any limitations that may exist in each subsidiary’s own financing arrangements.

Guarantees

BHP Billiton Limited and BHP Billiton Plc will fully and unconditionally guarantee the payment of the principal of, premium, if any, and interest on the debt securities, including any additional amounts which may be payable in respect of the debt securities, as described under “Optional Tax Redemption—Payment of Additional Amounts”. BHP Billiton Limited and BHP Billiton Plc guarantee the payment of such amounts when such amounts become due and payable, whether on an interest payment date, at the stated maturity of the debt securities, by declaration or acceleration, call for redemption or otherwise. Each of BHP Billiton Plc and BHP Billiton Limited is individually obligated to pay such amounts.

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Legal Ownership

Street Name and Other Indirect Holders

Investors who hold debt securities in accounts at banks or brokers will generally not be recognized by the issuer or the guarantors as legal holders of debt securities. This is called holding in street name. Instead, the issuer and the guarantors will recognize only the bank or broker holding, or the financial institution the bank or broker uses to hold, its debt securities. These intermediary banks, brokers and other financial institutions pass along principal, interest and other payments on the debt securities, either because they agree to do so in their customer agreements or because they are legally required to do so. If you are considering holding debt securities in street name, you should check with your own institution to find out:

Direct Holders

The issuer’s obligations, the guarantors’ obligations, as well as the obligations of the trustee and those of any third parties employed by the issuer, the guarantors or the trustee, run only to persons who are registered as holders of debt securities. As noted above, the issuer and the guarantors do not have obligations to you if you hold in street name or other indirect means, either because you choose to hold debt securities in that manner or because the debt securities are issued in the form of global securities as described below. For example, once the issuer or the guarantors make payment to the registered holder, it has or they have, as the case may be, no further responsibility for the payment even if that holder is legally required to pass the payment along to you as a street name holder but does not do so.

Global Securities

What are Global Securities? Global securities are a special type of indirectly held securities, as described above under “Legal Ownership—Street Name and Other Indirect Holders”. The ultimate beneficial owners of global securities can only be indirect holders.

The issuer and the guarantors require that the global securities be registered in the name of a financial institution they select. In addition, the issuer and the guarantors require that the debt securities included in the global securities not be transferred to the name of any other direct holder unless the special circumstances described below occur. The financial institution that acts as the sole direct holder of the global securities is called the depositary. Any person wishing to own a debt security must do so indirectly by virtue of an account with a broker, bank or other financial institution that in turn has an account with the depositary.

Special Investor Considerations for Global Securities. As an indirect holder, an investor’s rights relating to global securities will be governed by the account rules of the investor’s financial institution and of the depositary, as well as general laws relating to securities transfers. Neither the issuer nor the guarantors recognize this type of investor as a holder of debt securities and instead deal only with the depositary that holds the global securities. The debt securities offered by this prospectus will only be issued in the form of global securities except in special circumstances described below.

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If you are an investor in global securities, you should be aware that:

Special Situations When Global Securities Will Be Terminated. In a few special situations described later, global securities will terminate and interests in them will be exchanged for physical certificates representing debt securities. After that exchange, the choice of whether to hold debt securities directly or in street name will be up to the investor. Investors must consult their own bank or broker to find out how to have their interests in debt securities transferred to their own name so that they will be direct holders. The rights of street name investors and direct holders in the debt securities have been previously described in the subsections entitled “Legal Ownership—Street Name and Other Indirect Holders” and “Legal Ownership—Direct Holders”.

The special situations for termination of global securities are:

When global securities terminate, the depositary (and not the issuer, the guarantors or the trustee) is responsible for deciding the names of the institutions that will be the initial direct holders. (Section 305)

Overview of Remainder of this Description

The remainder of this description summarizes:

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Additional Mechanics

Exchange and Transfer

The debt securities will be issued:

You may have your debt securities broken into more debt securities of smaller denominations or combined into fewer debt securities of larger denominations, as long as the total principal amount is not changed. (Section 305) This is called an exchange.

You may exchange or transfer your debt securities at the applicable corporate trust office of the trustee. The trustee acts as the issuer’s and the guarantors’ agent for registering debt securities in the names of holders and transferring the debt securities. The issuer or the guarantors may change this appointment to another entity or perform the service themselves. The entity performing the role of maintaining the list of registered holders is called the security registrar. It will also register transfers of the debt securities. (Section 305)

You will not be required to pay a service charge to transfer or exchange debt securities, but you may be required to pay for any tax or other governmental charge associated with the exchange or transfer. The transfer or exchange of a registered debt security will only be made if the security registrar is satisfied with your proof of ownership.

The issuer or the guarantors may cancel the designation of any particular transfer agent. The issuer or the guarantors may also approve a change in the office through which any transfer agent acts. (Section 1002)

If the issuer redeems less than all of the debt securities, it may block the transfer or exchange of debt securities during a specified period of time in order to freeze the list of holders to prepare the mailing. The period begins 15 days before the day the issuer mails the notice of redemption and ends on the day of that mailing. The issuer may also refuse to register transfers or exchanges of debt securities selected for redemption in whole or in part. However, it will continue to permit transfers and exchanges of the unredeemed portion of any debt security being partially redeemed. (Section 305)

Payment and Paying Agents

The issuer will pay interest to you if you are a direct holder listed in the trustee’s records at the close of business on a particular day in advance of each due date for interest, even if you no longer own the debt security on the interest due date. That particular day, usually about two weeks in advance of the interest due date, is called the regular record date. (Section 307)

The issuer will pay interest, principal and any other money due on your debt securities at the applicable corporate trust office of the trustee in New York City. That office is currently located at 101 Barclay Street, New York, New York 10286. You must make arrangements to have your payments picked up at or wired from that office. The issuer may also choose to pay interest by mailing checks.

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Interest on global securities will be paid to the holder thereof by wire transfer of same-day funds.

Holders buying and selling debt securities must work out between them how to compensate for the fact that the issuer will pay all the interest for an interest period to, in the case of certificated debt securities, the one who is the registered holder on the regular record date. The most common manner is to adjust the sales price of the debt securities to prorate interest fairly between buyer and seller. This prorated interest amount is called accrued interest.

The issuer or the guarantors may also arrange for additional payment offices, and may cancel or change these offices, including the issuer’s or the guarantors’ use of the trustee’s corporate trust office. These offices are called paying agents. The Bank of New York Mellon, located at 101 Barclay Street, New York, New York 10286, acts as paying agent. The issuer or the guarantors may also choose to act as their own paying agent. The issuer or the guarantors must promptly notify the trustee of changes in the paying agents for any particular series of debt securities. (Section 1002)

Notices

The issuer, the guarantors and the trustee will send notices only to direct holders, using their addresses as listed in the trustee’s records. (Section 106)

Regardless of who acts as paying agent, all money that the issuer pays to a paying agent that remains unclaimed at the end of two years after the amount is due to direct holders will be repaid to the issuer. After that two-year period, you may look only to the issuer and the guarantors for payment and not to the trustee, any other paying agent or anyone else. (Section 1003)

Special Situations

Mergers and Similar Events

The issuer and the guarantors are generally permitted to consolidate or merge with another company or firm. The issuer and the guarantors are also permitted to sell or lease substantially all of their assets to another firm or to buy or lease substantially all of the assets of another firm. However, neither the issuer nor the guarantors may take any of these actions unless all the following conditions are met:

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It is possible that a merger or other similar transaction could be treated for U.S. Federal income tax purposes as a taxable exchange by the holders of debt securities for new securities, which could result in holders recognizing taxable gain or loss for U.S. Federal income tax purposes. A merger or other similar transaction could also have adverse tax consequences to holders under other tax laws to which the holders are subject.

Modification and Waiver

There are three types of changes we can make to the indenture and the debt securities.

Changes Requiring Your Approval. First, there are changes that cannot be made to the debt securities without your specific approval. Following is a list of those types of changes:

Changes Requiring a Majority Vote. The second type of change to the indenture and the debt securities is the kind that requires a vote in favour by holders of debt securities owning a majority of the principal amount. Most changes fall into this category, except for clarifying changes, amendments, supplements and other changes that would not adversely affect holders of the debt securities in any material respect. The same vote would be required for the issuer or the guarantors to obtain a waiver of all or part of the covenants described below or a waiver of a past default. However, the issuer or the guarantors cannot obtain a waiver of a payment default or any other aspect of the indenture or the debt securities listed in the first category described previously under “Special Situations—Modification and Waiver—Changes Requiring Your Approval” unless they obtain your individual consent to the waiver. (Section 513)

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Changes not Requiring Approval. The third type of change does not require any vote by holders of debt securities. This type is limited to clarifications and other changes that would not adversely affect holders of the debt securities in any material respect. (Section 901)

Further Details Concerning Voting. When taking a vote, the issuer and the guarantors will use the following rules to decide how much principal amount to attribute to a security:

Optional Tax Redemption

Your debt securities may be redeemed in whole, but not in part, in the three situations described below. The redemption price for the debt securities will be equal to the principal amount of the debt securities being redeemed plus accrued interest and any additional amounts due on the date fixed for redemption. Furthermore, you must receive between 30 and 60 days’ notice before your debt securities are redeemed.

The first situation is where, as a result of a change in, execution of or amendment to, any laws or treaties or the official application or interpretation of any laws or treaties, the issuer or any guarantor determines that it or they would be required to pay additional amounts as described later under “Special Situations—Payment of Additional Amounts”.

This applies only in the case of changes, executions or amendments that occur in the jurisdiction where the issuer, BHP Billiton Plc or BHP Billiton Limited are incorporated. If the issuer, BHP Billiton Plc or BHP Billiton Limited, as the case may be, has been succeeded by another entity, the applicable jurisdiction will be the jurisdiction in which such successor entity is organized, and the applicable date will be the date the entity became a successor.

The issuer will not have the option to redeem the debt securities in this case if the issuer or the relevant guarantor, as the case may be, could have avoided the payment of additional amounts or the deduction or withholding by using reasonable measures available to it.

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The second situation is where, as a result of a change in, execution of or amendment to any laws or treaties or the official application or interpretation of any laws or treaties, the guarantors determine that they or any subsidiary of any guarantor would have to deduct or withhold tax on any payment made to the issuer to enable it to make a payment of principal or interest on a debt security.

This applies only in the case of changes, executions or amendments that occur in the jurisdiction where the issuer, BHP Billiton Plc and BHP Billiton Limited are incorporated. If the issuer, BHP Billiton Plc or BHP Billiton Limited, as the case may be, has been succeeded by another entity, the applicable jurisdiction will be the jurisdiction in which such successor entity is organized, and the applicable date will be the date the entity became a successor.

The issuer will not have the option to redeem in this case if the issuer or the relevant guarantor, as the case may be, could have avoided the payment of additional amounts or the deduction or withholding by using reasonable measures available to it.

The third situation is where, following a merger, consolidation or sale or lease of the issuer’s or either guarantor’s assets to a person that assumes or, if applicable, guarantees the issuer’s obligations on the debt securities or the respective guarantor’s obligations on the guarantees, that person would be required to pay additional amounts as described later under “Special Situations—Payment of Additional Amounts”.

The issuer or the other person will have the option to redeem the debt securities in this situation even if additional amounts became payable immediately upon completion of the merger or sale transaction, including in connection with an internal corporate reorganization. Neither the issuer nor that person has any obligation under the indenture to seek to avoid the obligation to pay additional amounts in this situation.

If the issuer or the guarantors intend to engage in an optional tax redemption, the issuer or the guarantors shall deliver to the trustee an Officer’s Certificate to the effect that the circumstances required for redemption exist. (Sections 1104 and 1108)

Payment of Additional Amounts

All payments of principal, premium, if any, and interest, if any, in respect of the debt securities or the guarantees will be made free and clear of, and without withholding or deduction for, any present or future taxes, assessments, duties or governmental charges of whatever nature imposed, levied or collected by or within a relevant taxing jurisdiction unless that withholding or deduction is required by law. A relevant taxing jurisdiction is any jurisdiction under the laws of which the issuer, BHP Billiton Plc or BHP Billiton Limited, as the case may be, or any successor entity, is organized (or any political subdivision or taxing authority of, or in, that jurisdiction having power to tax).

The indenture provides that if withholding or deduction is required by law, then the issuer or the guarantors, as the case may be, must pay to the holder of any debt security additional amounts as may be necessary in order that every net payment of principal of (and premium, if any, on) and interest, if any, on that debt security after deduction or other withholding for or on account of any present or future tax, assessment, duty or other governmental charge of any nature whatsoever imposed, levied or collected by or on behalf of a relevant taxing jurisdiction, will not be less than the amount then due and payable on that debt security. However, the indenture also provides that the issuer or the guarantors, as the case may be, will not be required to make any payment of additional amounts in any of the following circumstances:

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These provisions will also apply to any taxes or governmental charges imposed by any jurisdiction in which a successor to the issuer, BHP Billiton Limited or BHP Billiton Plc is incorporated. Additional amounts may also be payable in the event of certain consolidations, mergers, sales of assets or assumptions of obligations. For more information see “Special Situations—Optional Tax Redemption.”

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Restrictive Covenants

Restrictions on Liens

Some of the issuer’s or the guarantors’ property may be subject to a mortgage or other legal mechanism that gives the issuer’s and the guarantors’ lenders preferential rights in that property over other lenders, including you and the other direct holders of the debt securities, or over the issuer’s or the guarantors’ general creditors if it or they fail to pay them back. These preferential rights are called liens. The issuer and the guarantors promise that they will not become obligated on any new debt for borrowed money that is secured by a lien on any of their properties, unless they grant an equivalent or higher-ranking lien on the same property to you and the other direct holders of the debt securities. This provision does not restrict the ability of subsidiaries of the guarantors (other than the issuer) to create, incur, assume or suffer to exist any liens. At the date of this prospectus, a substantial portion of the consolidated assets of the guarantors is held by their subsidiaries and thus would not be subject to this restriction on liens.

Neither the issuer nor the guarantors need to comply with this restriction if the amount of all debt that would be secured by liens on the issuer’s or the guarantors’ properties, excluding the debt secured by the liens that are listed below, is less than 10% of BHP Billiton Group’s net tangible assets (as defined below). (Sections 101 and 1008).

The restriction on liens applies only to liens for borrowed money. In addition, this restriction on liens also does not apply to debt secured by a number of different types of liens. These types of liens include the following:

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Definitions:

“Commodity hedging agreement” means any commodity derivative, exchange, swap agreement or other similar agreement or arrangement designed to protect the guarantors or any of their subsidiaries against fluctuations in commodity prices.

“Currency agreement” means any foreign exchange contract, currency swap agreement or other similar agreement or arrangement designed to protect the guarantors or any of their subsidiaries against fluctuations in currency values.

“Interest rate agreement” means any interest rate protection agreement, interest rate future, interest rate option, interest rate swap, interest rate cap or other interest rate hedge arrangement, to or under which any guarantor or any of their subsidiaries is a party or a beneficiary on the date hereof or becomes a party or a beneficiary hereafter.

“Net tangible assets” means all of the assets of the guarantors and their subsidiaries (except goodwill, trademarks, patents, trade names and all other intangible assets) less all current liabilities, all as shown in the most recent consolidated financial statements of the BHP Billiton Plc Group, which are the consolidated accounts of the BHP Billiton Group, prepared on a consolidated basis in accordance with IFRS.

You should note that at June 30, 2012, the BHP Billiton Group had US$1,707 million of total secured debt.

Restrictions on Sales and Leasebacks

Neither the issuer nor the guarantors will enter into any sale and leaseback transaction involving a property, other than as allowed by this covenant, as described below. A sale and leaseback transaction is an arrangement between the issuer or the guarantors and a bank, insurance company or other lender or investor where it or they lease a property that it or they previously owned for more than six months and sold to a lender or investor or to any person to whom the lender or investor has advanced funds on the security of the principal property.

The restriction on sales and leasebacks does not apply to any sale and leaseback transaction between any companies of the BHP Billiton Group. It also does not apply to any lease with a term, including renewals, of three years or less. Further, the indenture does not restrict the ability of any subsidiary (other than the issuer) to enter into sale and leaseback transactions. At the date of this prospectus, a substantial portion of the issuer’s and the guarantors’ consolidated assets are held directly by subsidiaries other than the issuer and so would not be subject to the covenant restricting sale and leaseback transactions.

The covenant allows the issuer or the guarantors to enter into sale and leaseback transactions in two additional situations. First, the issuer or the guarantors may enter into sale and leaseback transactions if it or they could grant a lien on the property in an amount equal to the indebtedness attributable to the sale and leaseback transaction without being required to grant an equivalent or higher-ranking lien to you and the other direct holders of the debt securities under the restriction on liens described above.

Second, the issuer or the guarantors may enter sale and leaseback transactions if, within one year of the transaction, the issuer or the guarantors, as the case may be, invest an amount equal to at least the net proceeds of

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the sale of the principal property that the issuer or the guarantors, as the case may be, lease in the transaction or the fair value of that property, whichever is greater. This amount must be invested in any of the issuer’s or the guarantors’ property or used to retire indebtedness for money that it or they borrowed, incurred or assumed that either has a maturity of 12 months or more from the date of incurrence of the indebtedness or which may be extended beyond 12 months from that date at the issuer’s or the guarantors’ option. (Section 1009)

Defeasance and Covenant Defeasance

The following discussion of defeasance and discharge will be applicable to your debt securities only if the issuer or the guarantors so elect. (Article 13)

Defeasance and Discharge

The issuer or the guarantors can legally release themselves from any payment or other obligations on the debt securities or the guarantees, as the case may be, except for various obligations described below, if the issuer or the guarantors, in addition to other actions, put in place the following arrangements for you to be repaid:

However, even if the issuer or the guarantors take these actions, a number of their obligations relating to the debt securities or the guarantees, as the case may be, will remain. These include the following obligations:

Covenant Defeasance

The issuer or the guarantors can be legally released from compliance with certain covenants, including those described under “Restrictive Covenants” and including the related Events of Default if the issuer or the guarantors, as the case may be, take all the steps described above under “Defeasance and Discharge” except that the opinion of counsel does not have to refer to a change in U.S. Federal income tax laws or a ruling from the U.S. Internal Revenue Service.

Default and Related Matters

Events of Default

You will have special rights if an event of default occurs and is not cured, as described later in this subsection.

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What is an Event of Default? The term event of default means any of the following:

Remedies if an Event of Default Occurs. If an event of default has occurred and has not been cured, the trustee may, and at the direction of the holders of 25% in principal amount of the debt securities shall, declare the entire principal amount and any accrued interest of all the debt securities to be due and immediately payable. This is called a declaration of acceleration of maturity. A declaration of acceleration of maturity may be cancelled by the holders of at least a majority in principal amount of the debt securities if the issuer or the guarantors have paid the outstanding amounts, other than amounts due because of the acceleration of maturity, and the issuer or the guarantors have satisfied certain other conditions. (Section 502)

Other than the duty to act with the required standard of care in the case of a default, the trustee is not required to take any action under the indenture at the request of any holders unless the holders offer the trustee reasonable protection from expenses and liability. This protection is called an indemnity. (Section 603) If indemnity in form and amount satisfactory to the trustee is provided, the holders of a majority in principal

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amount of the outstanding debt securities may direct the time, method and place of conducting any lawsuit or other formal legal action seeking any remedy available to the trustee. These majority holders may also direct the trustee in performing other actions specified under the indenture. (Section 512)

Before you bypass the trustee and bring your own lawsuit or other formal legal action or take other steps to enforce your rights or protect your interests relating to the debt securities, the following must occur:

However, such limitations do not apply to a suit instituted by you for the enforcement of payment of the principal of or interest on a debt security on or after the respective due dates. (Section 508)

The issuer and the guarantors will furnish to the trustee within 120 days of the end of their respective fiscal years a written statement of certain of the issuer’s or the guarantors’ officers certifying that, to their knowledge, the issuer and the guarantors are in compliance with the indenture and the debt securities, or else specifying any default and the nature and status thereof. (Section 1005)

Further Issues

We may from time to time, without notice to or the consent of the registered holders of the debt securities offered in this offering, create and issue additional debt securities having the same terms as and ranking equally and ratably with the debt securities offered in this offering in all respects (or in all respects except for the payment of interest accruing prior to the issue date of such additional debt securities or except for the first payment of interest following the issue date of such additional debt securities), so that such additional debt securities shall be consolidated and form a single series with, shall be fungible for United States federal income tax purposes with, and shall have the same terms as to status, redemption or otherwise as, those debt securities.

Regarding the Trustee

Several members of the BHP Billiton Group maintain banking relations with the trustee, or affiliates of the trustee, in the ordinary course of their business.

If the trustee has a conflicting interest with respect to the debt securities within the meaning of the Trust Indenture Act of 1939, the trustee may be required to resign as trustee under the indenture and the issuer or the guarantors would be required to appoint a successor trustee.

Governing Law

The indenture is, and the debt securities and guarantees will be, governed by and construed in accordance with the laws of the State of New York without regard to principles of conflicts of law.

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Consent to Service of Process

The indenture provides that the issuer and each guarantor have severally appointed CT Corporation as its authorized agent for service of process in any legal action or proceeding arising out of or relating to the indenture or the debt securities offered under the indenture brought in any federal or state court in the Borough of Manhattan, City of New York, New York, and the issuer and each guarantor will irrevocably submit to the non-exclusive jurisdiction of such courts in any such legal action or proceeding.

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CLEARANCE AND SETTLEMENT

Debt securities that BHP Billiton Finance (USA) issues may be held through one or more international and domestic clearing systems. The principal clearing systems we will use are the book-entry systems operated by DTC in the United States, Clearstream Banking, société anonyme (“Clearstream, Luxembourg”) in Luxembourg and Euroclear in Brussels, Belgium. These systems have established electronic securities and payment transfer, processing, depositary and custodial links among themselves and others, either directly or through custodians and depositaries. These links allow securities to be issued, held and transferred among the clearing systems without the physical transfer of certificates.

Special procedures to facilitate clearance and settlement have been established among these clearing systems to trade securities across borders in the secondary market. Where payments for debt securities BHP Billiton Finance (USA) issues in global form will be made in United States dollars, these procedures can be used for cross-market transfers and the securities will be cleared and settled on a delivery against payment basis.

Cross-market transfers of debt securities that are not in global form may be cleared and settled in accordance with other procedures that may be established among the clearing systems for these securities. Investors in debt securities that are issued outside of the United States, its territories and possessions must initially hold their interests through Euroclear, Clearstream, Luxembourg or the clearance system that is described in the applicable prospectus supplement.

The policies of DTC, Clearstream, Luxembourg and Euroclear will govern payments, transfers, exchange and other matters relating to the investor’s interest in securities held by them. This is also true for any other clearance system that may be named in a prospectus supplement.

We have no responsibility for any aspect of the actions of DTC, Clearstream, Luxembourg or Euroclear or any of their direct or indirect participants or accountholders. We have no responsibility for any aspect of the records kept by DTC, Clearstream, Luxembourg or Euroclear or any of their direct or indirect participants or accountholders. We also do not supervise these systems in any way. This is also true for any other clearing system indicated in a prospectus supplement.

DTC, Clearstream, Luxembourg, Euroclear and their participants and accountholders perform these clearance and settlement functions under agreements they have made with one another or with their customers. You should be aware that they are not obligated to perform these procedures and may modify them or discontinue them at any time.

The description of the clearing systems in this section reflects our understanding of the rules and procedures of DTC, Clearstream, Luxembourg and Euroclear as they are currently in effect. Those systems could change their rules and procedures at any time.

The Clearing Systems

DTC

DTC has advised us as follows:

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Clearstream, Luxembourg

Clearstream, Luxembourg has advised us as follows:

Euroclear

Euroclear has advised us as follows:

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Other Clearing Systems

We may choose any other clearing system for a particular series of debt securities. The clearance and settlement procedures for the clearing system we choose will be described in the applicable prospectus supplement.

Primary Distribution

The distribution of the debt securities will be cleared through one or more of the clearing systems that we have described above or any other clearing system that is specified in the applicable prospectus supplement. Payment for debt securities will be made on a delivery versus payment or free delivery basis. These payment procedures will be more fully described in the applicable prospectus supplement.

Clearance and settlement procedures may vary from one series of debt securities to another according to the currency that is chosen for the specific series of debt securities. Customary clearance and settlement procedures are described below.

We will submit applications to the relevant system or systems for the debt securities to be accepted for clearance. The clearance numbers that are applicable to each clearance system will be specified in the prospectus supplement.

Clearance and Settlement Procedures—DTC

DTC participants that hold debt securities through DTC on behalf of investors will follow the settlement practices applicable to United States corporate debt obligations in DTC’s same-day funds settlement system.

Debt securities will be credited to the securities custody accounts of these DTC participants against payment in same-day funds, for payments in United States dollars, on the settlement date. For payments in a currency other than United States dollars, securities will be credited free of payment on the settlement date.

Clearance and Settlement Procedures—Euroclear and Clearstream, Luxembourg

We understand that investors that hold their debt securities through Euroclear or Clearstream, Luxembourg accounts will follow the settlement procedures that are applicable to conventional Eurobonds in registered form or such other procedures as are applicable for other securities.

Debt securities will be credited to the securities custody accounts of Euroclear and Clearstream, Luxembourg accountholders on the business day following the settlement date, for value on the settlement date. They will be credited either free of payment or against payment for value on the settlement date.

Secondary Market Trading

Trading between DTC Participants

Secondary market trading between DTC participants will occur in the ordinary way in accordance with DTC’s rules. Secondary market trading will be settled using procedures applicable to United States corporate debt obligations in DTC’s Same-Day Funds Settlement System for debt securities.

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If payment is made in United States dollars, settlement will be in same-day funds. If payment is made in a currency other than United States dollars, settlement will be free of payment. If payment is made other than in United States dollars, separate payment arrangements outside of the DTC system must be made between the DTC participants involved.

Trading between Euroclear and/or Clearstream, Luxembourg Accountholders

We understand that secondary market trading between Euroclear and/or Clearstream, Luxembourg accountholders will occur in the ordinary way following the applicable rules and operating procedures of Euroclear and Clearstream, Luxembourg. Secondary market trading will be settled using procedures applicable to conventional Eurobonds in registered form.

Trading between DTC and Euroclear or Clearstream, Luxembourg

A purchaser of debt securities that are held in the account of a DTC participant must send instructions to Euroclear or Clearstream, Luxembourg at least one business day prior to settlement. The instructions will provide for the transfer of the securities from the selling DTC participant’s account to the account of the purchasing Euroclear or Clearstream, Luxembourg participant. Euroclear or Clearstream, Luxembourg, as the case may be, will then instruct the common depositary for Euroclear and Clearstream, Luxembourg to receive the debt securities either against payment or free of payment.

The beneficial interests in the debt securities will be credited to the respective clearing system. The clearing system will then credit the account of the participant, following its usual procedures. Credit for the debt securities will appear on the next day, European time. Cash debit will be back-valued to, and the interest on the debt securities will accrue from, the value date, which would be the preceding day, when settlement occurs in New York. If the trade fails and settlement is not completed on the intended date, the Euroclear or Clearstream, Luxembourg cash debit will be valued as of the actual settlement date instead.

Euroclear participants or Clearstream, Luxembourg participants will need the funds necessary to process same-day funds settlement. The most direct means of doing this is to preposition funds for settlement, either from cash or from existing lines of credit, as for any settlement occurring within Euroclear or Clearstream, Luxembourg. Under this approach, participants may take on credit exposure to Euroclear or Clearstream, Luxembourg until the securities are credited to their accounts one business day later.

As an alternative, if Euroclear or Clearstream, Luxembourg has extended a line of credit to them, participants can choose not to preposition funds and will allow that credit line to be drawn upon to finance settlement. Under this procedure, Euroclear participants or Clearstream, Luxembourg participants purchasing debt securities would incur overdraft charges for one business day, (assuming they cleared the overdraft as soon as the debt securities were credited to their accounts). However, interest on the debt securities would accrue from the value date. Therefore, in many cases, the investment income on debt securities that is earned during that one business day period may substantially reduce or offset the amount of the overdraft charges. This result will, however, depend on each participant’s particular cost of funds.

Because the settlement will take place during New York business hours, DTC participants will use their usual procedures to deliver debt securities to the depositary on behalf of Euroclear participants or Clearstream, Luxembourg participants. The sale proceeds will be available to the DTC seller on the settlement date. For the DTC participants, then, a cross-market transaction will settle no differently than a trade between two DTC participants.

Special Timing Considerations

You should be aware that investors will only be able to make and receive deliveries, payments and other communications involving the debt securities through Clearstream, Luxembourg and Euroclear on days when those systems are open for business. Those systems may not be open for business on days when banks, brokers and other institutions are open for business in the United States.

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In addition, because of time-zone differences, there may be problems with completing transactions involving Clearstream, Luxembourg and Euroclear on the same business day as in the United States. United States investors who wish to transfer their interests in debt securities, or to receive or make a payment or delivery of debt securities, on a particular day, may find that the transactions will not be performed until the next business day in Luxembourg or Brussels, depending on whether Clearstream, Luxembourg or Euroclear is used.

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MATERIAL TAX CONSEQUENCES

Australian Taxation

This section summarizes the major Australian tax consequences which will generally be applicable to a holder who is a resident of the United States and is not a resident of Australia for Australian tax purposes. This summary reflects the current provisions of the Australian Income Tax Assessment Act 1936 (the “Australian Tax Act”), the Australian Income Tax Assessment Act 1997 and the Australian Taxation Administration Act 1953, and is the opinion of Greenwoods & Freehills Pty Limited, the Australian taxation counsel to the issuer.

The matters contained in this summary are not comprehensive of all possible Australian tax considerations that could apply to particular holders. Each holder’s individual circumstances will vary and each holder should seek expert advice on all Australian tax considerations that may be applicable to their own circumstances.

Payments of Principal, Premium and Interest

The general position under current Australian income tax law is that non-resident holders of the debt securities or interests in any global security are not subject to Australian income tax on payments of interest or amounts in the nature of interest, other than interest withholding tax (currently 10%—unless an exemption applies, as to which see comments below) on interest or amounts in the nature of interest paid on the debt securities. This general position does not apply where a person holds such debt securities or interests in any global security as part of a business carried on at or through a permanent establishment in Australia (an “Australian Branch”).

There is a general exemption from interest withholding tax provided the requirements in section 128F of the Australian Tax Act are met.

The issuer intends to offer and sell the debt securities in a manner that will satisfy the requirements of section 128F of the Australian Tax Act. Accordingly, if the section 128F requirements are satisfied, payments of interest to non-residents will not be subject to Australian interest withholding tax.

The key requirements of section 128F are as follows:

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