7 FERS Retirement Myths That Are Quietly Costing Federal Employees Thousands

The break room is the most expensive financial advisor in the federal government.

I'm only half joking. Somebody two cubicles down retired last year, told three people how it worked for them, and now that story is circulating through your building as established fact. Except their situation isn't your situation, they were CSRS Offset, and they got one detail wrong that's about to cost you real money.

This is not a knock on your coworkers. It's a knock on a system that leaves a 30-year employee with nothing better than hallway conversation to plan the biggest financial decision of their life. Confusion about your federal retirement benefits is not a character flaw. The system was built to be complex and it was never designed to explain itself to you.

So let's clear out seven of the most expensive myths I hear, in the order that they cost people money.

Myth 1: "My unused sick leave will let me retire earlier."

It won't. This one costs people entire careers of planning.

Unused sick leave is converted to additional service credit — but only for the computation of your annuity, not for eligibility. If you need 30 years of service to retire at your MRA, you need 30 actual years. A bank of 2,000 sick leave hours will not get you there a year early.

What it will do is increase your pension. Every additional year of credited service adds roughly 1% of your high-3 (or 1.1% if you retire at 62 or later with at least 20 years). So that sick leave is genuinely valuable — just not for the reason most people think.

The flip side matters too: burning sick leave in your final year because you think it's use-it-or-lose-it is a permanent trade. Every hour you spend is an hour that doesn't convert to pension credit, and that pension pays for the rest of your life. Annual leave is different — that gets paid out in a lump sum. Sick leave does not.

Myth 2: "My high-3 is based on my total pay."

Only some of it counts. And people routinely overestimate their pension by hundreds of dollars a month because of this.

Your high-3 is the average of your highest three consecutive years of basic pay. Basic pay includes your base salary and locality pay, plus certain special rate supplements.

It does not include overtime, bonuses, cash awards, holiday pay, night differential, Sunday premium pay, hazard pay, or travel reimbursement.

If you're the person working significant overtime and mentally counting all of it toward your retirement, stop. Run the calculation on basic pay only. The number will be lower than you expect, and it's better to find that out five years early than five weeks early.

Myth 3: "I've got my 10 years, so I'm vested and I'm fine."

Vested and unreduced are two completely different words.

Yes, at 5 years you're vested in FERS. At MRA with 10 years, you can retire. But under MRA+10, your annuity is permanently reduced by 5% for every year you are under age 62. Retire at 57, and that's a 25% permanent cut. Forever. It never comes back.

And as I've covered before — MRA+10 retirees do not receive the FERS Annuity Supplement at all.

So the person who retires at 57 with 12 years takes a permanently reduced pension and gets nothing to bridge them to Social Security. That combination is the single most expensive misunderstanding in the FERS system, and it happens because "I'm eligible" got confused with "I'm ready."

Myth 4: "I'll skip the survivor benefit and buy life insurance instead — it's cheaper."

Sometimes that math works. But there's a hidden condition almost nobody accounts for.

Under FERS you have two survivor options: 50% of your base annuity (which reduces your own annuity by 10%) or 25% (a 5% reduction). You can also elect none, with your spouse's notarized consent.

Here's the part that gets skipped: a survivor annuity is generally the precondition for your spouse to continue FEHB coverage after your death. If no survivor annuity is payable, your surviving spouse generally loses federal health insurance — unless they're separately eligible through their own federal service.

So the honest comparison isn't "survivor reduction versus life insurance premium." It's "survivor reduction versus life insurance premium plus the cost of replacing FEHB on the private market for a widow or widower in their seventies." That second number is usually the one that decides it.

Let me be direct: this is an irrevocable election made at retirement. It is one of the very few decisions in your entire federal career that you cannot undo. Treat it accordingly.

Myth 5: "FEGLI is a good deal, so I should keep all of it into retirement."

Basic FEGLI in retirement is often a reasonable keep. Option B usually isn't.

If you elect the 75% Reduction option on your Basic coverage, you keep paying employee-era premiums until age 65. After that, your coverage reduces 2% per month until it hits 25% of the original amount — and once those reductions start, your Basic coverage is free for the rest of your life. That's a genuinely decent structure.

Option B is a different animal. Those premiums are age-banded and climb steeply once you're past 60. Plenty of retirees are paying several hundred dollars a month by their seventies for coverage they could have replaced a decade earlier at a fraction of the cost. FEGLI isn't bad — it's a decision with a price tag that changes over time, and most people never revisit it after the day they retire.

Myth 6: "Medicare Part B is optional for me, so I'll just skip it."

For most FEHB retirees, Part B is genuinely optional. For most postal retirees, it is not.

Under the Postal Service Health Benefits (PSHB) Program, Medicare-eligible postal annuitants and their Medicare-eligible family members are generally required to enroll in Medicare Part B to keep PSHB coverage. There are real exceptions — postal annuitants who retired on or before January 1, 2025 and weren't already enrolled in Part B, and postal employees who were age 64 or older on January 1, 2025 — but if you're outside those carve-outs, this is a requirement, not a suggestion.

This is a critical distinction between PSHB and FEHB, and it catches postal employees who assume the rules that applied to their federal counterparts apply to them. They don't.

And the cost is not trivial. The standard Part B premium for 2026 is $202.90 per month. If your income is high enough, IRMAA surcharges kick in — those begin above roughly $109,000 in modified adjusted gross income for single filers and $218,000 for joint filers, based on your 2024 tax return. At the top tier, the monthly Part B premium climbs to nearly $690.

Which means your TSP withdrawal strategy and your Medicare premium are connected in a way most people never realize until the bill arrives two years later.

Myth 7: "I'm maxing my TSP, so I'm doing everything right."

Maxing it is good. Knowing the current rules is better.

For 2026, the TSP elective deferral limit is $24,500. If you turn 50 or older during 2026, you can add up to $8,000 in catch-up contributions, for a total of $32,500.

Here's what a lot of people missed: under SECURE 2.0, participants turning age 60, 61, 62, or 63 in 2026 get an enhanced catch-up limit of $11,250 — bringing their total to $35,750. That's an extra $3,250 in tax-advantaged space available in exactly the four years when most federal employees are trying to close the gap before retirement. A lot of people are leaving it on the table because nobody told them it existed.

And one more that started this year: beginning January 1, 2026, if your prior-year wages exceeded the IRS threshold — $150,000 in 2025 — any catch-up contributions you make must be designated as Roth. Not traditional. If you had a traditional catch-up election running on autopilot, it may have changed underneath you.

What All Seven Have in Common

Look back at that list. Not one of these is a bad investment decision. Not one is a market timing mistake. Every single one is an information problem — a rule that exists, that affects real money, that nobody sat you down and explained.

The difference between understanding your benefits and not understanding them isn't small. Across a survivor election, a retirement date, a supplement eligibility threshold, and a decade of Medicare premiums, it's six figures. Sometimes considerably more.

The most expensive retirement mistake isn't a bad investment. It's waiting too long to understand what you actually have.

After 20, 30, 40 years of service, you deserve better than a hallway rumor and a benefits packet. Clarity is not a luxury. It's the baseline.

Get your Federal Retirement Blueprint at quiz.fedsecure.org. A few questions, and you'll see exactly which of these are live issues in your plan — before they turn into permanent decisions.

Frequently Asked Questions

Does unused sick leave help me retire earlier under FERS?

No. Unused sick leave is converted to service credit for computing your annuity amount, but it does not count toward retirement eligibility. You must still meet the age and service requirements using actual creditable service. Each additional year of credit adds roughly 1% of your high-3 to your pension, or 1.1% if you retire at age 62 or later with at least 20 years.

What is included in the FERS high-3 average salary?

Your high-3 is the average of your highest three consecutive years of basic pay, which includes base salary, locality pay, and certain special rate supplements. It does not include overtime, bonuses, cash awards, holiday pay, night differential, Sunday premium pay, or hazard pay.

How much is the MRA+10 retirement penalty?

Under MRA+10, your FERS annuity is permanently reduced by 5% for each year you are under age 62 at retirement. Retiring at 57 results in a 25% permanent reduction. MRA+10 retirees are also ineligible for the FERS Annuity Supplement.

Can my spouse keep FEHB if I don't elect a survivor benefit?

Generally no. A survivor annuity is typically the precondition for a surviving spouse to continue FEHB coverage after your death. If no survivor annuity is payable, FEHB coverage for your surviving spouse generally ends unless they are separately eligible through their own federal employment. This election is irrevocable once you retire.

Do postal retirees have to enroll in Medicare Part B?

Most Medicare-eligible postal annuitants must enroll in Medicare Part B to maintain PSHB coverage. Key exceptions include postal annuitants who retired on or before January 1, 2025 and were not already enrolled in Part B, and postal employees who were age 64 or older on January 1, 2025. This requirement does not exist under the FEHB Program.

What is the TSP contribution limit for 2026?

The 2026 elective deferral limit is $24,500. Participants age 50 and older can contribute an additional $8,000 in catch-up contributions. Participants turning age 60, 61, 62, or 63 during 2026 qualify for an enhanced catch-up limit of $11,250 under SECURE 2.0. If your 2025 wages exceeded $150,000, your catch-up contributions must be designated as Roth.