UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 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): February 14, 2013

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 (see General Instruction A.2.):

On December 31, 2012, DriveTime Automotive Group, Inc. (“DTAG”) and DriveTime Acceptance Corporation (“DTAC”), through DTAC’s wholly-owned subsidiaries, DT Warehouse II, LLC (“DT Warehouse II”), and DT Credit Company, LLC (“DTCC”), entered into Amendment No. 1 to the Amended and Restated Loan and Servicing Agreement (the “Amendment”), amending the Amended and Restated Loan and Servicing Agreement, dated December 31, 2012, by and among DT Warehouse II, as Borrower, DTCC, as Servicer, Wells Fargo Bank, National Association, as Paying Agent and Securities Intermediary and Santander Consumer USA Inc. (“SCUSA”), as Lender and Backup Servicer (the “Loan Agreement”). This Loan Agreement is referred to in our financial reports as the portfolio residual facility with SCUSA.

The Amendment revises the definition of a Delinquency Measurement Contract as well as revises the rate used for a Trigger Event in the calculation of the Rolling Average Delinquency Ratio for Managed Portfolio Contracts, such that the terms are more consistent with comparable calculations on other revolving debt facilities.

The foregoing description of the Amendment and the Loan Agreement is only a summary, does not purport to be complete and is qualified in its entirety by reference to the Amendment, which will be filed as an exhibit to DTAC’s next Annual Report on Form 10-K and is incorporated herein by reference and the Loan Agreement, which is filed as Exhibit 10.13 to Amendment No. 7 to the Form S-4 Registration Statement filed on April 27, 2011 and is incorporated herein by reference.

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.