CFR > Title 5 - Administrative Personnel > CHAPTER I—OFFICE OF PERSONNEL MANAGEMENT > SUBCHAPTER B—CIVIL SERVICE REGULATIONS (parts 110 to 990) > PART 839—CORRECTION OF RETIREMENT COVERAGE ERRORS UNDER THE FEDERAL ERRONEOUS RETIREMENT COVERAGE CORRECTIONS ACT > SUBPART I—Social Security Taxes (§839.901 to §839.903) > 839.903—What happens to the Social Security taxes I erroneously paid when my employer corrects my retirement coverage to CSRS?

839.903—What happens to the Social Security taxes I erroneously paid when my employer corrects my retirement coverage to CSRS?

(a) Except for the last 3 years, the money you erroneously paid into Social Security will remain to your credit in the Social Security fund. The Social Security Administration will include all but those last 3 years in determining your eligibility for, and the amount of, future benefits.
(b) The amount you paid into Social Security for the last 3 years will be used to help pay your CSRS retirement deductions.