5 CFR §831.1004
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The employing agency, the Secretary of the Senate, and the Clerk of the House of Representatives must submit to OPM, in accordance with instructions issued by OPM, a contribution to the CSRS equal to the amount required to be contributed for the employee or Member under 5 U.S.C. 8334(a)(1) as if the employee or Member were not subject to the OASDI tax.