FERS Pension Explained 2026: Contribution Rates by Hire Date

Two GS-12 Step 5 employees sit in the same office in the same locality area, doing the same job for $101,443 a year. One takes home $140 more per pay period. Not performance, not a bonus—just when they were hired.

That is the FERS contribution tier system. Congress raised the employee share of the pension cost twice in two years without touching the benefit formula. If you started federal service before 2013, you pay 0.8% of salary toward your FERS basic annuity. Walk in the door on January 2, 2014, and you pay 4.4%. Same pension. Different price.

FERS Employee Contribution Rate 2026: The Three Tiers

The FERS employee contribution rate in 2026 is 0.8%, 3.1%, or 4.4% of basic pay, locked to your initial hire date and unchanged from prior years. The current FERS retirement contribution rate falls into one of three tiers depending on when you started federal service. Your tier is locked to your initial hire date into a covered federal position. There is no way to change it, no grandfathering into a lower rate, and no opting out.

Not sure which tier you are in? Pull your SF-50 and check block 30. "K" is original FERS at 0.8%. "KR" is FERS-RAE at 3.1%. "KF" is FERS-FRAE at 4.4%. You can also just divide your biweekly FERS deduction on your LES by your biweekly gross—you will get your rate.

What These Tiers Actually Cost You

Take that GS-12 Step 5 in the Rest of U.S. locality area—$101,443 a year, $3,901.65 biweekly before deductions. Here is what each tier pulls from every paycheck:

Original FERS (0.8%): $31.21 per pay period. $811 a year.

FERS-RAE (3.1%): $120.95 per pay period. $3,145 a year.

FERS-FRAE (4.4%): $171.67 per pay period. $4,463 a year—for the exact same pension formula.

The gap between original FERS and FRAE at this salary: $140.46 every two weeks. Over a full year, the FRAE employee pays $3,652 more. Over 30 years that adds up to roughly $110,000 in extra contributions for a benefit calculated identically.

At higher grades the disparity gets sharper. A GS-13 Step 5 in the Washington-Baltimore locality ($138,024) pays $42.47 biweekly under original FERS versus $233.58 under FRAE. That is a $191-per-paycheck gap, or about $4,969 a year.

The Pension Formula

Here is what you get for those contributions. The FERS basic annuity formula under 5 U.S.C. §8415:

That 0.1% difference sounds trivial. It is not. Take a high-3 of $120,000 with 30 years of service:

Retire at 57 (MRA with 30 years): 1.0% × $120,000 × 30 = $36,000/year. That is $3,000 a month.

Retire at 62: 1.1% × $120,000 × 30 = $39,600/year. $3,300 a month.

The 1.1% multiplier is worth $3,600 more per year, every year, for the rest of your life—with COLAs on top. If you are within a few years of 62 and thinking about pulling the trigger early, run the math. For most feds the bump is worth the wait.

Your "high-3" is the highest average basic pay over any 36 consecutive months, which for most people means their last three years on the job. Locality pay counts. Overtime, bonuses, and shift differentials do not.

The 2025 Rate Increase That Did Not Happen

In early 2025, the House Committee on Oversight floated raising every FERS tier to 4.4% (Section 90001 of the HOGR committee print). For original FERS employees, that would have meant going from $31 to $172 per pay period on a GS-12 salary—a 450% increase overnight.

The House Rules Committee stripped the provision before H.R. 1 passed the House on May 22, 2025. It was never enacted into law (CRS In Focus IF12996, IF13020). Current rates are unchanged.

But this idea keeps coming back. The 0.8% tier is a visible target whenever Congress needs budget offsets. If you are an original FERS employee counting on that rate lasting your entire career, keep an eye on reconciliation bills.

FERS Is One Leg of a Three-Legged Stool

FERS was designed as three separate retirement income streams under P.L. 99-335:

Leg 1 — The basic annuity. Your pension. Everything on this page.

Leg 2 — Social Security. FERS employees pay into it, unlike most CSRS employees, so you collect a Social Security benefit based on your full earnings history.

Leg 3 — The Thrift Savings Plan. With a 5% government match that vests after three years.

The pension alone was never meant to replace your salary. A 30-year employee with a $120,000 high-3 gets $39,600 a year from the annuity—roughly a third of working income. Social Security and TSP are supposed to fill the rest. If you are not at least hitting 5% TSP for the full match, you are leaving the stool short a leg.

FERS vs. CSRS

If you entered federal service before 1987, you might be under the Civil Service Retirement System. The differences are substantial.

CSRS employees contribute 7% of pay and get a much richer pension formula: 1.5% to 2% per year depending on length of service. A 30-year CSRS employee with a $100,000 high-3 collects roughly $56,250 per year. The equivalent FERS pension is about $30,000 to $33,000. But CSRS retirees get no Social Security credit from their federal service and received no TSP government match until recently.

CSRS was closed to new hires on January 1, 1987, with narrow exceptions for certain rehires. If you are under CSRS and using this calculator, the results will be wrong—the deduction logic is built entirely around FERS.

Retirement Eligibility and the MRA

Your Minimum Retirement Age depends on birth year and falls between 55 and 57. The paths to an unreduced FERS annuity:

MRA + 30 years: Unreduced. The most common path for career feds.

Age 60 + 20 years: Unreduced.

Age 62 + 5 years: Unreduced. And you get the 1.1% multiplier if you have 20+ years.

MRA + 10 years: Reduced. Your annuity takes a permanent 5% hit for every year you are under 62. Retire at 57 with 15 years and that is a 25% reduction that never goes away. If early retirement is tempting, compare the reduced annuity against the value of a few more years—both for the multiplier and for adding service time to the formula.

Survivor Benefits

At retirement you choose whether to provide a survivor annuity to your spouse under 5 U.S.C. §8442. Three options:

Full survivor benefit: Your pension drops 10%. Your spouse gets 50% of your unreduced annuity after your death, adjusted annually for COLAs.

Partial survivor benefit: 5% reduction. Spouse gets 25%.

No survivor benefit: Requires your spouse's notarized written consent.

For most couples, the full survivor benefit is the right call. That 10% reduction buys your spouse a lifetime, inflation-adjusted income stream. Try pricing a comparable annuity from a private insurer at retirement age—it will not be cheap, and it will not include automatic COLAs. The survivor annuity is one of the most valuable pieces of the FERS package, and it is the one people most often underestimate at retirement.

If your spouse has their own substantial pension or retirement savings, the partial benefit might make sense. But declining survivor coverage entirely to keep an extra 10% of your monthly check is a gamble most federal benefits advisors recommend against.

How This All Hits Your Paycheck

Your FERS contribution is pre-tax—it comes out before federal income tax is calculated, so it lowers your withholding. But it does not reduce your FICA wages. Social Security and Medicare are still calculated on gross pay minus FEHB premiums only, under Premium Conversion (26 U.S.C. §125).

That distinction trips people up. The FERS deduction saves you a bit on federal taxes but does nothing for FICA. And your tier has zero effect on anything else in your benefits package: TSP match, FEHB premium, FEGLI cost, Social Security benefit. The only thing that varies is the FERS line on your LES.

That is the frustration of the tier system in one sentence: newer employees pay more for the same thing.