If you’re planning to retire before age 62 under FERS, the Special Retirement Supplement, commonly called the FERS supplement, could be one of the most valuable parts of your retirement income picture. Here’s what you need to know.
What It Is
The FERS supplement is a temporary benefit designed to bridge the income gap between your retirement date and age 62, when Social Security eligibility begins. Because FERS was designed as a three-part system, pension, TSP, and Social Security, the supplement fills the gap for employees who retire before Social Security kicks in. It’s paid monthly alongside your FERS annuity and is automatic. There is no separate application required.
Who Qualifies
Not every retiree receives the FERS supplement. To be eligible, you must retire with an immediate unreduced annuity under one of the following:
- MRA with 30 or more years of creditable service
- Age 60 with at least 20 years of service
Employees who retire under MRA+10, disability retirement, or deferred retirement are not eligible. Employees who retire under a VERA may qualify, but the supplement won’t begin until they reach their MRA.
Special provision employees (law enforcement officers, firefighters, and air traffic controllers) qualify under different rules and can retire earlier.
How It’s Calculated
The supplement is based on an estimate of the Social Security benefit you earned during your federal service. The formula is:
(Years of FERS civilian service / 40) x Estimated Social Security benefit at age 62
For example, if your estimated Social Security benefit at 62 is $1,800 per month and you have 30 years of FERS service, your supplement would be approximately $1,350 per month. The calculation uses only your civilian federal service; military time is generally not included unless it has been formally credited.
The Earnings Test
Once you reach your MRA, the supplement is subject to an earnings test, the same one used for Social Security. For 2026, the exempt amount is $24,480. If your wages or self-employment income exceed that threshold, your supplement is reduced by $1 for every $2 you earn above the limit.
Importantly, TSP withdrawals, investment income, and rental income do not count toward the earnings test. Only wages and self-employment income are included.
Reductions don’t take effect immediately. If you exceed the earnings limit in 2026, the reduction won’t apply until July 2027.
When It Ends
The supplement stops automatically the month before you turn 62, regardless of whether you have filed for Social Security. It is not a lifetime benefit.
A Federal Retirement Consultant (FRC®) can show you how the supplement fits into your complete retirement income picture.
