UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): March 7, 2014

AMERICAN HONDA FINANCE CORPORATION

(Exact Name of Registrant as Specified in Its Charter)

(310) 972-2288

(Registrant’s Telephone Number, Including Area Code)

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Item 1.01 Entry into a Material Definitive Agreement.

On March 7, 2014, American Honda Finance Corporation (“AHFC”) entered into the following credit agreements:

The 364 Day Credit Agreement provides that AHFC may borrow up to $3,500,000,000 on a 364-day revolving basis and the Five Year Credit Agreement provides that AHFC may borrow up to $3,500,000,000 on a five-year revolving basis, each for general corporate purposes. Outstanding borrowings under the Credit Agreements bear interest, at AHFC’s option, based on the base rate for base rate loans or the specified LIBOR rate for Eurodollar loans plus the applicable margin. The base rate under the Credit Agreements is the higher of (i) the federal funds rate plus 0.50%, (ii) the prime rate determined by the administrative agent, or (iii) the one month LIBOR rate plus 1.00%. On the date of this filing, no amounts were drawn upon under the Credit Agreements.

The Credit Agreements contain customary conditions to borrowing and customary restrictive covenants, including limitations on liens and limitations on mergers and consolidations and asset sales. The Credit Agreements also require AHFC to maintain a positive consolidated tangible net worth. The Credit Agreements, in addition to other customary events of default, include cross-default provisions and provisions for default if Honda Motor Co., Ltd., an indirect parent of AHFC (“HMC”), does not maintain ownership, whether directly or indirectly, of at least 80% of the outstanding capital stock of AHFC. In addition, the Credit Agreements contain provisions for default if HMC’s obligations under the Keep Well Agreement, dated as of September 9, 2005, between HMC and AHFC, become invalid, voidable, or unenforceable. All of these conditions, covenants and events of default are subject to important limitations and exceptions under the agreements governing the Credit Agreements.

Certain of the lenders party to the Credit Agreements, as well as certain of their respective affiliates, have performed, and may in the future perform, commercial banking, investment banking, underwriting and other financial advisory services for AHFC and its affiliates, for which they have received, and will receive, customary fees and expenses.

The foregoing descriptions of the Credit Agreements do not purport to be complete and are qualified in their entirety by reference to the full text of such agreements. Copies of the 364 Day Credit Agreement and the Five Year Credit Agreement are included in this Form 8-K as Exhibits 10.1 and 10.2, respectively, and are incorporated herein by reference.

Item 1.02 Termination of a Material Definitive Agreement.

The Credit Agreements replace AHFC’s $6,000,000,000 credit agreement, dated as of March 18, 2011, by and among AHFC, as borrower, and the lenders party thereto, The Bank of Tokyo-Mitsubishi UFJ, Ltd., as administrative agent and auction agent, Bank of America, N.A., Barclays Capital, the Investment Banking Division Of, Barclays Bank PLC, Deutsche Bank AG, New York Branch and JPMorgan Chase Bank, N.A., as syndication

agents, BNP Paribas, Citibank, N.A. and The Royal Bank of Scotland PLC, as documentation agents, Mizuho Corporate Bank, Ltd., Los Angeles Branch and Wells Fargo Bank, N.A., as senior managing agents and Credit Suisse AG, Cayman Islands Branch and Sumimoto Mitsui Banking Corporation, as managing agents, which terminated on March 7, 2014. No amounts were outstanding or repaid under the $6,000,000,000 credit agreement in connection with its termination on March 7, 2014.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

The information set forth above under Item 1.01 is hereby incorporated by reference in its entirety in this Item 2.03.

Item 8.01 Other Events.

AHFC’s commercial paper program in the United States was increased from $6,000,000,000 to $7,000,000,000 on March 7, 2014. Under the U.S. commercial paper program AHFC may borrow a minimum of $100,000 for periods from one day to 270 days. Interest rates on the commercial paper are fixed at the time of issuance. AHFC’s U.S. commercial paper program is supported by the Credit Agreements.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXHIBIT INDEX