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

December 4, 2015 (December 1, 2015)

Date of Report

(Date of earliest event reported)

SYNCHRONY FINANCIAL

(Exact name of registrant as specified in its charter)

(203) 585-2400

(Registrant’s telephone number, including area code)

N/A

(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:

On December 1, 2015, Synchrony Financial (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with Citigroup Global Markets Inc., as representative of the several underwriters listed on Schedule I of the Underwriting Agreement (collectively, the “Underwriters”), to issue and sell $1,000,000,000 aggregate principal amount of 2.600% Senior Notes due 2019 (the “Notes”) in a public offering pursuant to the Company’s Registration Statement on Form S-3 (File No. 333-200374) (the “Registration Statement”) and a related prospectus, including the related prospectus supplement, filed with the Securities and Exchange Commission.

The Notes will be governed by an Indenture, dated as of August 11, 2014 (the “Base Indenture”), between the Company and The Bank of New York Mellon, as trustee (the “Trustee”), as supplemented to December 4, 2015 and as further supplemented by a Fourth Supplemental Indenture, dated as of December 4, 2015 (the “Fourth Supplemental Indenture”), between the Company and the Trustee (as so supplemented, the “Indenture”).

The foregoing summary of the Underwriting Agreement does not purport to be complete and is qualified in its entirety by reference to the text of the Underwriting Agreement, which is filed as Exhibit 1.1 hereto and incorporated by reference into this Item 8.01 and into the Registration Statement. The foregoing summary of the Indenture does not purport to be complete and is qualified in its entirety by reference to the Fourth Supplemental Indenture filed as Exhibit 4.1 hereto, and the form of the Notes, which is included in Exhibit 4.1 hereto, each of which is incorporated by reference into this Item 8.01 and into the Registration Statement, and the Base Indenture, which was filed as Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on August 13, 2014.

A copy of the opinion of Weil, Gotshal & Manges LLP, relating to the validity of the Notes, is incorporated by reference into the Registration Statement and is filed as Exhibit 5.1 hereto.

(d) Exhibits

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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 hereunto duly authorized.

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EXHIBIT INDEX

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