UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K/A

Amendment No. 1

Annual report pursuant to section 13 or 15(d) of the Securities Exchange Act of 1934

for the fiscal year ended December 31, 2012

Commission file number 1-10254

TOTAL SYSTEM SERVICES, INC.

(Exact name of registrant as specified in its charter)

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: NONE

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    YES  x    NO  ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act.    YES  ¨    NO  x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months, and (2) has been subject to such filing requirements for the past 90 days.    YES  x    NO  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    YES  x    NO  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    YES  ¨    NO  x

As of June 30, 2012, the aggregate market value of the registrant’s common stock held by non-affiliates of the registrant was approximately $4,372,878,000 based on the closing sale price as reported on the New York Stock Exchange.

As of February 20, 2013, there were 186,586,846 shares of the registrant’s common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

EXPLANATORY NOTE

Total System Services, Inc. is filing this Amendment No. 1 on Form 10-K/A for the sole purpose of amending Item 15 of its Annual Report on Form 10-K for the year ended December 31, 2012, as filed with the Securities and Exchange Commission on February 26, 2013, to include Exhibit 99.1, the Annual Report on Form 11-K for the Total System Services, Inc. 2012 Employee Stock Purchase Plan for the year ended December 31, 2012 as set forth below and in the attached exhibits. This Amendment No. 1 does not otherwise update information in the originally filed Form 10-K to reflect facts or events occurring subsequent to the original filing date.

PART IV

Item 15. Exhibits and Financial Statement Schedules

The following consolidated financial statements of TSYS are incorporated in this document by reference from pages 26 through 69 of the Annual Report.

Consolidated Balance Sheets - December 31, 2012 and 2011.

Consolidated Statements of Income - Years Ended December 31, 2012, 2011 and 2010.

Consolidated Statements of Other Comprehensive Income - Years Ended December 31, 2012, 2011 and 2010.

Consolidated Statements of Cash Flows - Years Ended December 31, 2012, 2011 and 2010.

Consolidated Statements of Changes in Equity - Years Ended December 31, 2012, 2011 and 2010.

Notes to Consolidated Financial Statements.

Report of Independent Registered Public Accounting Firm.

Management’s Report on Internal Control Over Financial Reporting.

The following report of independent registered public accounting firm and consolidated financial statement schedule of TSYS are included:

Report of Independent Registered Public Accounting Firm.

Schedule II - Valuation and Qualifying Accounts - Years Ended December 31, 2012, 2011 and 2010.

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All other schedules are omitted because they are inapplicable or the required information is included in the consolidated financial statements and notes thereto.

The following exhibits are filed herewith or are incorporated to other documents previously filed with the SEC. Exhibits 10.4 through 10.35 pertain to executive compensation plans and arrangements. With the exception of those portions of the Annual Report and Proxy Statement that are expressly incorporated by reference in this Form 10-K, such documents are not to be deemed filed as part of this Form 10-K.

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EXECUTIVE COMPENSATION PLANS AND ARRANGEMENTS

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We agree to furnish the SEC, upon request, a copy of each instrument with respect to issues of long-term debt. The principal amount of any individual instrument, which has not been previously filed, does not exceed ten percent of the total assets of TSYS and our subsidiaries on a consolidated basis.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, Total System Services, Inc. has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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