The Complete Guide to FERS Retirement

Federal employees are told their benefits are generous — and they are. But almost no one explains how they actually work. Your agency is required to give you access to retirement information, yet by law it can't give you individual advice. So most people approach the biggest financial decision of their careers with a benefits portal, a stack of statements, and a lot of guesswork.

This guide fixes that. It walks through the Federal Employees Retirement System (FERS) the way we'd explain it in a benefits review — clearly, accurately, and with the specific numbers that matter in 2026. By the end, you'll understand what you've earned, when you can access it, and where the costly mistakes hide.

The three legs of FERS

FERS was designed as a "three-legged stool." Your retirement income is meant to come from three sources working together:

• The FERS pension (basic annuity) — a guaranteed monthly payment for life, based on your salary and years of service.
• The Thrift Savings Plan (TSP) — your retirement savings account, similar to a 401(k), with a government match.
• Social Security — which you pay into like everyone else, and claim on top of your federal benefits.

No single leg is meant to carry your retirement alone. The pension typically replaces only 30–40% of your pre-retirement income, which is why the TSP and your Social Security timing matter so much. Understanding how the three interact — and when each becomes available — is the heart of good federal retirement planning.

When can you retire? MRA and eligibility

There is no single "federal retirement age." Your options depend on a combination of your age and your years of creditable service. The starting point is your Minimum Retirement Age (MRA), which is set by your birth year.

Reaching your MRA doesn't automatically mean a full pension. To retire with an immediate, unreduced annuity, you generally need to meet one of these age-and-service combinations:

• MRA with 30 years of creditable service — the most common full-retirement path.
• Age 60 with 20 years of creditable service.
• Age 62 with 5 years of creditable service.

How your pension is calculated

The FERS basic annuity uses a straightforward formula:

Each piece matters:

• High-3 salary is the average of your highest 36 consecutive months of basic pay. For most people that's their final three years — but if you earned more earlier (say, in a higher-locality area), your High-3 can come from that period. High-3 includes locality pay but excludes bonuses, overtime, and other premium pay.
• Years of service is your total creditable service, including credited sick leave and bought-back military time.
• Multiplier is 1.0% for most retirees — or 1.1% under one specific condition, covered next.

A quick example: a $100,000 High-3 with 30 years of service at the standard 1.0% multiplier produces $100,000 × 30 × 1.0% = $30,000 per year, before any deductions for survivor benefits, health premiums, or taxes.

The 1.1% multiplier — a 10% raise for life

Here's one of the most valuable — and most misunderstood — provisions in the entire system. If you retire at age 62 or later with at least 20 years of creditable service, your multiplier increases from 1.0% to 1.1%.

That sounds tiny. It isn't. The higher multiplier applies to every year of service, not just years beyond 20 — and it's permanent, compounding with cost-of-living adjustments for the rest of your life.

That's $2,750 more per year, every year — roughly $69,000 over a 25-year retirement before COLAs, and closer to $90,000 once you account for them. For an employee sitting at 19 or 20 years and approaching 62, waiting a few months can be the single highest-value decision in the entire retirement plan.

The FERS supplement explained

If you retire before age 62 on an immediate, unreduced annuity, you may receive the FERS Special Retirement Supplement — often just called "the supplement." It's a monthly payment that approximates the Social Security benefit you earned during your federal service, and it bridges the income gap until you turn 62 and can claim Social Security.

You qualify for the supplement if you retire under one of these paths:

• MRA with 30 years of service, or
• Age 60 with 20 years of service.

It's calculated roughly as: (your years of FERS civilian service ÷ 40) × your estimated Social Security benefit at 62. Note that only civilian federal service counts — bought-back military time does not factor into the supplement calculation, even though it counts toward your pension.

The supplement stops automatically the month before you turn 62, whether or not you've filed for Social Security. It receives no cost-of-living adjustments, and it's taxable as ordinary income (though, unlike wages, it isn't subject to Social Security or Medicare tax).

MRA+10, postponed, and deferred retirement

What if you reach your MRA with at least 10 years of service, but fewer than 30? You have options — but they come with tradeoffs worth understanding before you choose.

MRA+10 (immediate, reduced)

You can start your annuity immediately, but it's reduced by 5% for each year you're under 62. Retire at 57 and that's a 25% permanent cut — a steep price.

Postponed retirement

Instead of taking the reduced annuity now, you can postpone it to a later date to reduce or eliminate the age penalty. The key advantage: you can reinstate FEHB (your federal health coverage) when the annuity begins. This is often the smarter play, and some employees deliberately postpone to exactly age 62 to also capture the 1.1% multiplier.

Deferred retirement

If you leave federal service before your MRA with at least 5 years, you can defer your pension to a later age. It's simpler to elect — but you permanently lose FEHB and FEGLI during and after the deferral. For most people, losing lifetime access to federal health coverage is a much bigger deal than it first appears.

Where the TSP fits

The pension is guaranteed but modest. The Thrift Savings Plan is where you close the gap between what the pension replaces (30–40% of income) and what you'll actually need in retirement (most planners target 70–80%).

Two essentials:

• Contribute at least 5%. The government matches your first 5% of contributions — that's an immediate, guaranteed return you shouldn't leave on the table.
• Withdrawal timing and strategy matter enormously. How and when you draw from your TSP, and whether traditional or Roth, affects your taxes for decades. This is where a coordinated plan across your pension, supplement, Social Security, and TSP pays off most.

The TSP deserves its own deep dive — but the headline is simple: your pension sets the floor, and your TSP determines your lifestyle.

Traditional vs. Roth inside the TSP

Your TSP can hold two types of money. Traditional contributions go in before tax and are taxed when you withdraw them in retirement. Roth contributions go in after tax and come out tax-free later. Which is better depends on whether you expect your tax rate to be higher now or in retirement — and most federal employees benefit from holding some of each, so they have flexibility to manage their taxable income year by year once they stop working. The government match, importantly, always goes into the traditional (pre-tax) side, regardless of where your own contributions go.

Withdrawal timing and the age-55 rule

How you access your TSP is as important as how you built it. One provision worth knowing: if you separate from federal service in or after the year you turn 55, you can take TSP withdrawals without the usual 10% early-withdrawal penalty that applies to IRAs before age 59½. That flexibility can shape your entire early-retirement income strategy — and it's one reason rolling everything straight into an IRA the day you retire isn't always the right move. The sequence in which you draw from your pension, supplement, TSP, and eventually Social Security determines your lifetime tax bill, and small changes compound over a 25- or 30-year retirement.

Survivor benefits — the decision that protects your spouse

At retirement, you choose whether to provide a survivor annuity — a continuing monthly payment to your spouse if you pass away first. It's one of the most consequential elections you'll make, and it's largely irreversible.

Electing a full survivor benefit reduces your own monthly pension (commonly by about 10%), but it guarantees your spouse a percentage of your annuity for the rest of their life — and, critically, preserves their access to FEHB health coverage. Declining or reducing the survivor benefit gives you a larger check now, but if you pass first, your spouse can lose both the income and the health coverage. Because the choice interacts with life insurance, TSP, and your spouse's own benefits, it deserves careful analysis rather than a default election on the retirement paperwork.

COLAs and taxes in retirement

Two forces quietly shape what your pension is actually worth over time.

Cost-of-living adjustments (COLAs). Your FERS pension receives annual COLAs to help it keep pace with inflation — but FERS COLAs work differently from Social Security's, and regular FERS retirees generally don't begin receiving them until age 62. Over a long retirement, the COLA structure meaningfully affects your purchasing power, which is why your income plan should account for inflation rather than assume a flat pension.

Taxes. Your FERS pension is taxable as ordinary income at the federal level. State treatment varies widely — some states fully exempt federal pensions, others tax them like any other income. Where you live in retirement can change your net pension by thousands of dollars a year. Coordinating your pension, taxable TSP withdrawals, Roth withdrawals, and Social Security is how retirees manage their bracket and keep more of what they've earned.

How to prepare before you set a date

Good federal retirements aren't decided in the final month — they're planned over the last few years. Here's what to have in order:

• Verify your Service Computation Date (SCD). Confirm every period of creditable service is counted, including military time you may want to buy back.
• Nail down your High-3. Know which 36 months are your highest, and whether an earlier high-locality period beats your final years.
• Confirm the FEHB five-year rule. Make sure you'll have been continuously enrolled for the five years before retirement.
• Map your income bridge. Between your federal retirement date and when Social Security begins, know exactly what carries you — pension, supplement, and TSP.
• Model your Social Security timing. Claiming at 62 versus full retirement age versus 70 changes your lifetime income substantially, and it interacts with everything else.
• Decide your survivor election deliberately — not as a checkbox on the last day.

The five most expensive mistakes

1. Missing the FEHB five-year rule — and losing lifetime federal health coverage.
2. Retiring at 61 instead of 62 with 20+ years — and forfeiting the 1.1% multiplier's 10% permanent boost.
3. Misunderstanding the supplement earnings test — taking post-retirement work that quietly claws back the supplement.
4. Not verifying the Service Computation Date — planning around a hire date that doesn't match actual creditable service, and being off on eligibility.
5. Choosing deferred over postponed retirement — surrendering FEHB and FEGLI without realizing what was given up.

Every one of these is avoidable with an accurate picture of your own numbers before you set a date. None of them can be undone afterward.

What to do next

This guide covers the framework. Your actual decision depends on your specific service record, your High-3, your family situation, and your goals — the details that turn general rules into a real plan. Two employees with identical salaries and service years can have very different "right answers" depending on their health coverage needs, their spouse's situation, their post-retirement work plans, and where they intend to live.

The review is genuinely free and carries no obligation. Some people leave confirming they're on track; others discover a timing decision worth tens of thousands of dollars they didn't know was on the table. Either way, you leave with clarity — and the workbook to keep.