UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A

(Amendment No. 1)

Quarterly Report Pursuant to Section 13 or 15 (d) of the Securities Exchange Act of 1934 for the

Quarterly period ended March 31, 2014

Commission File Number: 000-26926

ScanSource, Inc.

(Exact name of registrant as specified in its charter)

6 Logue Court

Greenville, South Carolina, 29615

(Address of principal executive offices)

(864) 288-2432

(Registrant’s telephone number, including area code)

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 (or for such shorter period that the registrant was required to file such reports), 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 website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post to such files.    Yes  x    No  ¨

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

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

EXPLANATORY NOTE

This Amendment No. 1 to Form 10-Q (this “Amendment”) amends the Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2014, originally filed on May 7, 2014 (the “Original 10-Q”), of ScanSource, Inc. (the “Company”). The Company is filing this Amendment to replace Exhibit 10.1 to include certain portions of the Exhibit that had previously been omitted or “redacted” pursuant to a request for confidential treatment. This Amendment provides a revised redacted version of Exhibit 10.1.

This Amendment should be read in conjunction with the Original 10-Q and the Company’s other filings made with the Securities and Exchange Commission subsequent to the filing of the Original 10-Q on May 7, 2014. The Original 10-Q has not been amended or updated to reflect events occurring after May 7, 2014, except as specifically set forth in this Amendment.

PART IV.

(b) Exhibits. See Exhibit Index.

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SIGNATURES

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

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