Social Security FERS Supplement Application

If you are asking about the FERS Retiree Annuity Supplement, this is automatic based on the type of retirement option you retire under. No application is required, however the supplement will not be paid until your retirement is finalized. It will be paid retroactive to the date you retired, just not while you are receiving interim payments from OPM. The retirement options which pay the supplement include Voluntary Retirement, Early Voluntary Retirement, Discontinued Service Retirement, and for those who retire under the Special Provisions.