Why Your FERS Pension Check May Be Smaller Than You Expect: 7 FERS Pension Deductions and Adjustments to Review Before Retirement

‍

FERS pension deductions are the subtractions and adjustments that make your actual FERS retirement income smaller than the gross annuity figure on your estimate. They include survivor benefit reductions, health and life insurance premiums, taxes, early-retirement penalties, and the earnings test on the FERS supplement. FERS, the Federal Employees Retirement System, calculates your gross pension from a formula. The income you live on reflects these deductions and adjustments.
‍

Federal employees who budget from the gross-annuity estimate can be surprised when their net payment is lower. This guide walks through seven items to review before you file, so your budget matches reality.
‍

The core problem is a mismatch of numbers. Your pre-retirement annuity estimate comes through your agency HR or benefits office, and it starts with an estimated gross annuity. OPM, the U.S. Office of Personnel Management, determines your final payable benefit after processing your retirement claim.
‍

According to Plan Your Federal Retirement, several deductions come out of that gross figure before you see it. Budgeting off the gross number overstates your real income.
‍

One distinction runs through this article. Most of these items affect the amount of retirement income you actually receive. Some change the annuity computation itself, like the survivor and MRA+10 reductions. Others come out as deductions from the payment, like FEHB, FEGLI, and tax withholding. The FERS supplement earnings test applies to the separate supplement rather than the basic annuity. Each item below includes the specific figure or rule that drives it.
‍

The Difference Between Your Gross and Net FERS Annuity
‍

Your gross FERS annuity is the product of a single formula. You multiply your High-3 average salary, your highest average basic pay over any three consecutive years of creditable service, by your years of creditable service, and then by a percentage multiplier.
‍

Basic pay is the OPM term for the pay on which retirement deductions are withheld. It generally excludes ordinary overtime, bonuses, and other non-creditable additional pay. Certain types of additional pay can count for retirement purposes, including locality pay, law enforcement availability pay (LEAP), administratively uncontrollable overtime (AUO), standby duty pay, and qualifying firefighter pay.
‍

According to OPM's FERS computation guidance, that multiplier is 1.0% for most retirees. It rises to 1.1% if you retire at age 62 or later with at least 20 years of service. Special-provision employees, including certain law enforcement officers, firefighters, and air traffic controllers, can have different annuity formulas. That result is the unreduced annuity.
‍

Your net annuity is what remains after deductions. Using illustrative figures, FedTools walks through a $5,000 gross monthly annuity. After a survivor reduction, FEHB and FEGLI premiums, and federal and state tax withholding, it nets roughly $3,515.
‍

Your own numbers will differ. The size of the gap depends entirely on your elections, plan, and tax situation. The structure is the same: gross first, then layers of subtraction. Understanding each layer is the difference between a realistic retirement budget and an unwelcome surprise.
‍

The Survivor Benefit Election Reduction
‍

The survivor benefit election can create one of the more significant voluntary reductions to a FERS annuity, and it lasts. According to OPM, electing a full survivor annuity reduces your own annuity by 10%. That full election pays your surviving spouse 50% of your unreduced annuity, subject to OPM's survivor-eligibility and remarriage rules.
‍

The partial survivor annuity pays 25% to your survivor and reduces your annuity by 5%. Choosing no survivor benefit avoids the reduction but requires your spouse's written, notarized consent.
‍

A surviving spouse's annuity generally continues for life. It can end if they remarry before age 55, unless the marriage to you lasted at least 30 years.
‍

This election has important time limits rather than being permanently irreversible. According to OPM, you can cancel or reduce a survivor election within 30 days after your first regular monthly annuity payment.
‍

After that 30-day window, you generally can't voluntarily cancel the current-spouse election simply by changing your mind. Separate rules apply after qualifying events such as divorce or remarriage. OPM also lets you add or increase a current-spouse survivor annuity within 18 months of your annuity commencing date, subject to a deposit and additional cost.
‍

The window is short, and the cost of changing later can be significant. Treat this as a decision to get right at retirement. A qualifying survivor annuity can also matter for your spouse's continued FEHB eligibility after your death, when the applicable survivor and enrollment requirements are met.
‍

FEHB Premiums Deducted From Your Annuity
‍

FEHB, the Federal Employees Health Benefits Program, can continue into retirement if you meet OPM's continuation requirements. Your premiums shift from your paycheck to your pension check.
‍

According to OPM, you generally must retire on an immediate annuity and be enrolled in FEHB on the date you retire. You also need continuous coverage under any FEHB plan, your own or as a family member, for the five years of service immediately before retirement, or for the full period since your first opportunity to enroll. According to Plan Your Federal Retirement, once you retire, your FEHB premium comes directly out of your monthly FERS annuity rather than your salary.
‍

Two changes catch retirees off guard. First, the dollar amount depends entirely on your specific FEHB plan and enrollment type, whether Self Only, Self Plus One, or Self and Family, and premiums are updated annually. Use the current OPM premium tables and your actual plan when you estimate your retirement deduction, rather than a general benchmark.
‍

Second, and more costly, the tax treatment changes. Plan Your Federal Retirement explains that you pay FEHB premiums pre-tax while you work under premium conversion. Ordinary annuitants don't participate in premium conversion in retirement, so they generally pay those premiums on an after-tax basis.
‍

Losing premium-conversion treatment can raise the after-tax cost of the same coverage. Always project your net annuity using your actual plan's retiree premium, not your working biweekly withholding.
‍

FEGLI Premiums and Reductions in Retirement
‍

FEGLI, the Federal Employees Group Life Insurance program, can continue into retirement only if you meet its continuation requirements. Its cost depends heavily on which coverage and which reduction elections you keep.
‍

According to OPM, to carry coverage into retirement you must retire on an immediate annuity and meet the five-year/all-opportunity rule. That rule applies separately to Basic and to each type of Optional coverage you want to keep.
‍

The rules then differ between Basic and Optional coverage. For Basic FEGLI in retirement, you elect the 75% Reduction, 50% Reduction, or No Reduction option. Under the 75% Reduction election, Basic coverage becomes premium-free when reductions begin, generally in the second month after you reach age 65 or retire, whichever is later. The 50% Reduction and No Reduction options carry additional premiums.
‍

Optional coverage works differently. Optional FEGLI, particularly Option B, uses age-based premiums that can become substantially more expensive as you move into older age bands. That's why life insurance that was inexpensive earlier in your career can cost far more later.
‍

Many retirees review their FEGLI elections at retirement and cut Optional coverage they no longer need, for example once a mortgage is paid off or children are grown. Basic and Optional coverage behave very differently, so review each separately and confirm the premium and reduction rules with OPM before you decide.
‍

Federal Income Tax Withholding
‍

A substantial portion of your FERS annuity is taxable, and federal income tax withholding can materially reduce your monthly payment. According to the IRS, a FERS annuity generally contains a taxable portion plus a tax-free recovery of the employee contributions you already paid tax on, recovered gradually under the Simplified Method.
‍

OPM issues Form CSA 1099-R each January reporting the taxable amount. The exact taxable share depends on your own cost basis.
‍

Withholding is not automatic at the right rate. You set your federal withholding through OPM. Set it too low, and you can face a tax bill or estimated-payment penalties at filing time.
‍

In the FedTools net-annuity illustration, federal tax withholding was a meaningful line item alongside the survivor reduction and insurance premiums. Your rate is elective, so review your withholding with your tax preparer before your first payment. That way your net check reflects your true after-tax income. Withholding is also one of the items you can adjust later if your situation changes.
‍

State Income Tax Where Applicable
‍

State income tax may affect your after-tax FERS income, and how much depends entirely on where you live in retirement. According to PlanWell Financial Planning, state income tax varies by state and may apply different exemptions or deductions to retirement income than federal rules do.
‍

Some states fully exempt federal pension income. Some tax it in full. Others offer partial exclusions tied to age or income.
‍

State tax and state withholding are separate. Per OPM, state withholding from your annuity is voluntary and available only where the state participates in OPM's withholding program, with the annuitant specifying the amount. You can still owe state tax even where withholding isn't set up.
‍

This liability is geography-dependent, so it's one of the few you can actually plan around. In the FedTools illustration, state tax withholding was $100 per month on a $5,000 gross annuity. For a retiree in a state that exempts federal pensions, that line is zero.
‍

If you're considering relocating in retirement, weigh the state tax treatment of your FERS annuity, your TSP, or Thrift Savings Plan, and your Social Security benefits. Confirm your destination state's rules before you assume your net check will match a former colleague's in a different state.
‍

The MRA+10 Early Retirement Age Reduction
‍

If you retire early under the MRA+10 provision, your annuity carries a permanent age reduction that stacks on top of the other deductions on this list. MRA is your Minimum Retirement Age, the age threshold used for standard voluntary FERS retirement rules, which is 57 for anyone born in 1970 or later. Other pathways, such as early retirement under VERA or disability retirement, use different age and service rules.
‍

According to OPM's FERS computation guidance, if you retire at your MRA with at least 10 but fewer than 30 years of service, your benefit drops by 5/12 of 1% for each full month, or 5% per year that you are under age 62.
‍

The reduction adds up quickly. If your annuity begins at 57, five years before age 62, the reduction can reach 25%.
‍

OPM also notes you can lessen or eliminate the reduction by postponing your annuity start date. You separate now but delay the pension until closer to 62, since the reduction is based on your age when the annuity actually begins.
‍

This penalty doesn't apply if you complete at least 30 years of service, or 20 years with an annuity beginning at age 60. The reduction is permanent once your annuity begins, so model the immediate versus postponed scenarios before you file.
‍

The FERS Supplement and Its Earnings Test
‍

The FERS Annuity Supplement, also called the Special Retirement Supplement, or SRS, is a bridge payment that approximates the Social Security benefit you earned during federal service. It comes with an important adjustment. This item works differently from the others: the earnings test reduces the supplement itself, not your basic FERS annuity.
‍

Eligibility is narrower than many retirees assume. According to OPM, the supplement is available to certain FERS employees who retire before age 62 on a qualifying immediate, unreduced annuity. Examples include MRA with at least 30 years of service, or age 60 with at least 20 years.
‍

OPM states that MRA+10, deferred, and disability retirees are not eligible for the supplement. If you retire under the MRA+10 provision covered above, you won't receive this payment at all.
‍

For those who do qualify, the supplement is subject to a Social Security earnings test once you reach MRA. According to OPM's 2026 benefits guidance, the exempt earnings amount for 2026 is $24,480. For affected recipients, the supplement drops by $1 for every $2 of earnings above that limit.
‍

The supplement is also 100% taxable as ordinary income per PlanWell Financial Planning. It stops at the end of the month before you turn 62, even if you delay claiming Social Security. If you qualify and plan to work after retiring, project the earnings-test reduction before you count the supplement as income.
‍

FERS Pension Deductions and Adjustments at a Glance
‍

The table below summarizes the seven items, whether each is voluntary or mandatory, and the governing figure. All percentages and rules are verified against OPM guidance and current-year federal benefits sources.

‍

‍

Figures reflect OPM guidance and 2026 federal benefits data. MRA+10, deferred, and disability retirees are not eligible for the FERS supplement. Confirm current-year premiums and thresholds against OPM.gov before filing.
‍

How to Estimate Your Real Net FERS Income
‍

Estimating your true net income is a step-by-step process. First, calculate your gross annuity using the OPM formula: High-3 × years of creditable service × multiplier.
‍

Second, apply any survivor election reduction of 10% or 5%, and any MRA+10 age reduction of 5% per year under 62. Third, subtract your actual FEHB and FEGLI retiree premiums. Fourth, subtract your federal and state tax withholding.
‍

If you qualify for the FERS supplement, account for it and any earnings-test reduction separately, since it is a distinct payment.
‍

The result gives you a more realistic estimate of your net monthly annuity before any other deductions or adjustments that apply to your situation. Court orders, allotments, or other withholding can also affect the final payment.
‍

Federal Employee Advisor Network, a retirement planning firm specializing in federal employee benefits, recommends running this calculation with your specific plan premiums and tax situation well before your planned retirement date, not in the final weeks.
‍

Some retirement elections have long-term or permanent consequences, the survivor election and the MRA+10 commencement date in particular. Others, such as tax withholding and certain insurance choices, you can change later under applicable rules. Knowing which is which lets you focus your attention where it matters most.
‍

Review Your Deductions and Adjustments Before You File
‍

The gap between your gross and net FERS income is not a mistake. It is the sum of predictable deductions and adjustments, most of which you can plan for and some of which you can change later.
‍

The survivor election, FEHB and FEGLI premiums, federal and state taxes, the MRA+10 reduction, and the FERS supplement earnings test each deserve a deliberate review before you submit your retirement application. The most consequential choices have short change windows or permanent effects.
‍

Federal Employee Advisor Network, a retirement planning firm specializing in federal employee benefits, helps federal employees model net income precisely and weigh election trade-offs while they can still adjust them. Before you set your retirement date, review each of these seven items against your own numbers, and verify every benefit figure against OPM.gov for the current plan year.
‍

Frequently Asked Questions
‍

1. Why is my FERS pension less than I calculated?

Your FERS pension is less than expected because the OPM formula produces a gross annuity, but your check reflects the net after deductions. Survivor benefit reductions, FEHB and FEGLI premiums, federal and state tax withholding, and any early-retirement penalty come out first, so the actual amount can be meaningfully lower than the gross figure.
‍

2. How much is taken out of a FERS annuity for survivor benefits?

According to OPM, a full survivor annuity reduces your FERS pension by 10% and pays your surviving spouse 50% of your unreduced annuity. A partial election reduces it by 5% and pays 25%. The survivor annuity generally continues for life but can end on remarriage before age 55 unless the marriage lasted 30 years.
‍

3. Are FEHB premiums deducted from my FERS pension in retirement?

Yes. If you retire on an immediate annuity, are enrolled at retirement, and meet the five-year coverage rule, your FEHB premium comes directly out of your monthly FERS annuity. Unlike your working years, ordinary annuitants pay these premiums on an after-tax basis rather than pre-tax, according to Plan Your Federal Retirement, which can raise the after-tax cost of the same coverage.
‍

4. Is my FERS pension taxed?

Yes. According to the IRS, a FERS annuity generally contains a taxable portion plus a tax-free recovery of your previously taxed employee contributions under the Simplified Method. OPM issues Form CSA 1099-R each January reporting the taxable amount. The exact taxable share depends on your own cost basis in the annuity.
‍

5. What is the MRA+10 penalty on a FERS pension?

The MRA+10 penalty is a permanent 5% reduction for each year you are under age 62 when you retire with 10 to 29 years of service, according to OPM. If your annuity begins at age 57, five years under 62, the reduction is 25%. Postponing your annuity start date can reduce or avoid it.
‍

6. Does working after retirement reduce my FERS Supplement?

It can. If you're eligible for the FERS Annuity Supplement and your wages or net self-employment earnings exceed the applicable limit after the earnings test applies, your supplement may drop. According to OPM, the 2026 exempt amount is $24,480, and the supplement is reduced by $1 for every $2 earned above it.
‍

Disclaimer

‍

This article is for informational and educational purposes only and does not constitute individualized financial, tax, legal, or benefits advice. FERS, FEHB, FEGLI, TSP, Social Security, and tax rules can change. Verify current information with OPM.gov, TSP.gov, SSA.gov, and IRS.gov, and consider consulting a qualified professional regarding your individual circumstances.