The FERS Annuity Supplement bridges the gap between your retirement date and age 62. It can be worth six figures over its lifetime — and it can be wiped out by a part-time job.

The benefit nobody explains until it's almost too late

There's a benefit sitting inside your FERS retirement that a lot of federal employees don't find out about until somebody at a retirement seminar mentions it in passing. And then they go home, do some math, and realize it might be worth $15,000, $20,000, sometimes more per year — for as long as five or six years.

It's called the FERS Annuity Supplement. Some people call it the Special Retirement Supplement. And it exists for one reason: to bridge the gap between the day you retire and the day you turn 62 and can claim Social Security.

Here's what makes it worth understanding properly. It is not automatic for everyone. It has an earnings test that can wipe it out entirely. And unlike the Social Security earnings test — which gives your money back later — the FERS supplement reduction is permanent. Once it's gone, it's gone.

So let's go through this carefully. Who gets it, how it's calculated, when it stops, and the three ways federal employees lose money on it without meaning to.

What the FERS supplement actually is

Your FERS retirement was designed as a three-legged stool: your basic annuity, your TSP, and Social Security. The problem is that a lot of federal employees can retire before 62 — but Social Security won't pay them until 62 at the earliest.

So the government built a bridge. The FERS supplement approximates the Social Security benefit you earned through your federal service and pays it to you monthly from the day you retire until the month you turn 62. Then it stops. Not reduces. Stops.

Important distinction that catches people: this is not Social Security. It doesn't come from the Social Security Administration, it doesn't affect your future Social Security benefit, and it doesn't get a cost-of-living adjustment. It's a FERS benefit paid by OPM that happens to be calculated using a Social Security-style formula.

Who qualifies — and who doesn't

This is where a lot of assumptions go wrong. Not every FERS retiree gets the supplement, and the distinction comes down to how you retire.

You generally qualify if you retire under:

• An immediate, unreduced annuity at your Minimum Retirement Age with 30 or more years of service
• An immediate, unreduced annuity at age 60 with 20 or more years of service
• Early retirement authority — a VERA (Voluntary Early Retirement Authority) or a discontinued service retirement — though in these cases the supplement typically doesn't begin until you reach your MRA
• Mandatory retirement provisions for special-category employees such as law enforcement officers, firefighters, and air traffic controllers

You generally do not qualify if you take:

• An MRA+10 retirement (retiring at your MRA with at least 10 but fewer than 30 years)
• A deferred retirement, where you separate and claim your annuity later
• A disability retirement

And there's a detail worth knowing: the supplement is calculated on your years of creditable civilian service under FERS. Military service you bought back counts toward your annuity, but it generally does not count toward your supplement calculation. That surprises people, and it can meaningfully change the number.

How much is it? The math, simplified

OPM uses an approximation. Here's the version you can run yourself on a napkin:

Take your estimated Social Security benefit at age 62. Multiply it by your years of creditable FERS civilian service. Divide by 40.

So if your Social Security statement projects roughly $2,000 a month at 62, and you have 30 years of FERS civilian service:

$2,000 × 30 ÷ 40 = $1,500 per month, or $18,000 a year.

Now think about what that means. If you retire at your MRA of 57 with 30 years, you collect that supplement for five years. That's roughly $90,000 in benefits that a lot of federal employees don't factor into their retirement date decision at all.

This is not a small number. And I have sat with people who moved their retirement date by four months without ever knowing what it cost them.

The earnings test — and why it's stricter than you think

Here's the part that costs people real money.

Once you've been retired for a full calendar year and you're receiving the supplement, an earnings test applies. For 2026, the annual earnings limit is $24,480. Earn more than that from wages or self-employment, and your supplement is reduced by $1 for every $2 you go over.

Let's make that concrete. You retire at 57. You take a part-time consulting role that pays $54,480 — thirty thousand over the limit. Your supplement gets cut by $15,000 for the year. If your supplement was $18,000, you're now collecting $3,000.

Two things about this test catch people off guard.

First, the reduction is permanent. Under the Social Security earnings test, benefits withheld before full retirement age get credited back to you through a recalculated benefit later. The FERS supplement has no such mechanism. Money reduced is money gone.

Second, the timing is delayed. The reduction based on your earnings in one year is applied to your supplement in the following year. So you can have a strong earnings year, feel fine, and then get hit in the next year's payments — often after you've already built the money into your budget.

What doesn't count toward the test: your FERS annuity itself, TSP withdrawals, rental income, investment income, and other pensions. It's wages and self-employment income only. That distinction is enormously useful if you're planning post-retirement work.

And a note for special-category retirees: law enforcement officers, firefighters, and air traffic controllers who retire under mandatory or special provisions are generally exempt from the earnings test until they reach the standard FERS MRA. If that's you, the planning math is different — and better.

The three ways federal employees lose supplement money

1. Retiring in a way that disqualifies them. Someone at 57 with 28 years of service, exhausted and ready to go, takes MRA+10 — and doesn't realize that waiting until 30 years would have unlocked five years of supplement payments plus an unreduced annuity. The gap between those two retirement dates is sometimes measured in months. The gap in lifetime benefits is measured in six figures.

2. Taking post-retirement work without structuring it. There is often a real difference between how and when income arrives — and between working full-time for two years versus part-time for four. Nobody at your exit interview is going to raise this.

3. Never claiming it because they didn't know it existed. It should be applied automatically when you meet the criteria, but application errors happen, and OPM has been processing retirement claims at an average of well over 100 days. If your first annuity payments look lighter than you expected, that's a question to ask — not something to wait out.

Where this fits in the bigger picture

The FERS supplement is one of five or six decisions you'll make at retirement — most of them at the same time, most of them irrevocable, and most of them explained to you in a single packet of forms.

When do you actually retire, and what does each additional month buy you? Do you keep FEHB, and how does it coordinate with Medicare? What survivor benefit do you elect, knowing that a 50% survivor annuity costs you a 10% reduction — and knowing that your spouse's ability to keep federal health coverage after you're gone depends on that election? How do you draw down your TSP? What do you do with FEGLI once the premiums start climbing?

These are not small questions. And the honest truth is that after 20, 30, 40 years of service, you deserve better than a stack of forms and a phone number.

Have you run your numbers?

Not your balance. Your numbers. What your annuity actually pays. What your supplement is worth. What it costs you to retire in March versus September. What happens to all of it if you take that consulting offer.

Most federal employees have never seen those figures side by side, because nobody in the system is responsible for putting them there. That's not your failure. That's a structural gap — and it's a fixable one.

Book a free strategy call. We'll walk through your actual service history, your supplement eligibility, your retirement date options, and what each one is worth in real dollars. No forms. No guessing. Just your numbers, explained clearly. Schedule your free strategy call at fedsecure.org.

Frequently Asked Questions

Who is eligible for the FERS supplement?

You are generally eligible if you retire with an immediate, unreduced FERS annuity at your Minimum Retirement Age with 30 or more years of service, or at age 60 with 20 or more years. Special-category employees retiring under mandatory provisions and employees taking VERA or discontinued service retirement may also qualify, though payments typically begin at MRA. MRA+10, deferred, and disability retirements do not qualify.

How is the FERS supplement calculated?

OPM approximates it by taking your estimated age-62 Social Security benefit, multiplying it by your years of creditable FERS civilian service, and dividing by 40. For example, a $2,000 projected Social Security benefit with 30 years of FERS service produces a supplement of about $1,500 per month.

What is the FERS supplement earnings limit for 2026?

The 2026 earnings limit is $24,480. If your wages and self-employment income exceed that amount, your supplement is reduced by $1 for every $2 above the limit. The reduction is applied to the following year's payments and is permanent — unlike the Social Security earnings test, withheld amounts are not credited back later.

Does TSP income count against the FERS supplement earnings test?

No. Only wages and self-employment income count toward the earnings test. TSP withdrawals, your FERS annuity, rental income, investment income, and other pensions do not reduce your supplement.

When does the FERS supplement stop?

The supplement ends the month you turn 62, regardless of whether you actually claim Social Security at that point. It does not reduce gradually and it does not continue in any form after age 62.

Does the FERS supplement receive a cost-of-living adjustment?

No. Unlike your basic FERS annuity, the supplement does not receive annual COLAs. The monthly amount you start with is essentially the amount you receive until it ends at age 62.