The FERS Supplement is available to early federal retirees who meet strict qualifications. It fills the gap between your FERS pension and Social Security until you hit age 62. To get it, you must retire under immediate retirement conditions and have 30 years of service at MRA or 20 at age 60. Early outs may qualify after reaching MRA. However, if your income from work is too high, you... https://www.federalpensionadvisors.com/post/fers-supplement-eligibility