FERS Retirement Tax Withholding: How Your Federal Pension Is Taxed

Your FERS Pension Is Taxable — Mostly

Your FERS annuity counts as ordinary income for federal tax purposes. OPM withholds federal income tax from each monthly payment based on the W-4P you file with them after retirement. But there's a meaningful piece of each payment that isn't taxable at all, and most retirees either don't know about it or calculate it incorrectly.

During your career, you contributed to FERS through after-tax payroll deductions — 0.8% of basic pay for standard FERS employees, 3.1% for FERS-RAE (hired in 2013), and 4.4% for FERS-FRAE (hired 2014 onward). Those contributions were made with money you'd already paid income tax on. When OPM pays them back to you as part of your pension, that portion is tax-free. You don't get taxed twice on the same dollars.

The Exclusion Ratio

The tax-free portion of your monthly pension is determined by something called the Simplified Method, which the IRS requires for federal annuities. Here's how it works:

1. Total employee contributions. Add up all the after-tax FERS deductions you paid during your career. This number appears on your CSA 1099-R from OPM after your first full year of retirement, and it's also tracked in your Individual Retirement Record.

2. Expected number of payments. The IRS provides a table in Publication 721 based on your age at retirement (or the combined ages of you and your survivor beneficiary, if applicable). For a single retiree age 60, the expected number is 310 monthly payments. Age 65 is 260.

3. Monthly exclusion. Divide your total contributions by the expected number of payments. That's the tax-free amount in each monthly check.

For example, a standard FERS employee who contributed $45,000 over a 30-year career and retires at 60 would have a monthly exclusion of roughly $145 ($45,000 ÷ 310). That $145 of each monthly payment is excluded from taxable income. Once the total exclusion amount has been fully recovered (after 310 payments in this example), every dollar of the pension becomes fully taxable.

FERS-RAE and FERS-FRAE employees contributed at higher rates, so their total contributions and exclusion amounts are larger — a meaningful tax advantage during the early years of retirement.

Setting Up Federal Withholding

When you separate from service, OPM sends you a package that includes Form W-4P (or its equivalent through Services Online). You choose your filing status and any extra withholding, or you can request a specific dollar amount withheld from each monthly payment.

Most retirees underestimate their first-year tax liability because they forget to account for the lump-sum annual leave payout — which is fully taxable ordinary income in the year of separation — combined with several months of regular salary, the start of pension payments, and potentially the first TSP withdrawal. All of this income can push you into a higher bracket for your final working year.

If you don't file a W-4P, OPM defaults to single filing status with no adjustments. Depending on your total income sources, that default may over-withhold.

After your first year, you can adjust withholding at any time through OPM's Services Online portal. Many retirees recalibrate after their first tax filing reveals the actual liability.

State Taxation of Federal Pensions

Federal pension taxation at the state level varies dramatically. Some states fully tax FERS annuities as ordinary income. Others exempt them partially or entirely.

States that do not tax retirement income at all include Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. Illinois, Mississippi, and Pennsylvania exempt all retirement income including federal pensions.

Several states offer partial exemptions. New York excludes the first $20,000 of federal pension income for residents age 59½ and older. Virginia provides an age deduction that increases annually. Maryland exempts a portion of retirement income based on age. Kentucky fully exempts federal retirement income.

Other states — California, Connecticut, Georgia, North Carolina, and several others — tax FERS pensions as regular income with no special exemption.

If you're planning to relocate in retirement, the state tax treatment of your pension can represent thousands of dollars annually. Moving from a state that fully taxes your $40,000 annuity to one that exempts it could save $2,000 to $4,000 per year depending on the state's marginal rate.

Check your state's current rules before making a move — legislatures adjust retirement income exemptions regularly, and what applied last year may not apply this year.

Interim Pay Tax Complications

During the period between your separation and OPM's final adjudication of your claim — averaging 108 days as of June 2026 — you receive interim pay. These interim payments are roughly 60% to 80% of your estimated gross annuity and are structured differently from your final annuity for tax purposes.

OPM does not apply the exclusion ratio during interim pay. The full interim payment is treated as taxable income. Once your annuity is finalized and you begin receiving the full amount, OPM recalculates and applies the exclusion from the beginning, potentially issuing an adjustment.

This can create a confusing first tax year. You'll receive a partial-year salary from your agency, a lump-sum annual leave payout, several months of fully-taxable interim pay, and then the start of your actual annuity with the exclusion applied. Working with a tax professional for your first post-retirement filing is worth the cost.

Survivor Annuity and Tax Implications

If you elect a survivor annuity, the 10% (maximum survivor) or 5% (partial survivor) reduction to your gross pension is not tax-deductible. The reduction lowers your gross annuity before taxes are applied, so your taxable income is based on the reduced amount — but you can't claim the reduction as an additional deduction.

When a surviving spouse begins receiving the survivor annuity after the retiree's death, the payments are taxable income to the survivor. The survivor also gets an exclusion ratio, calculated based on their own life expectancy and the remaining unrecovered employee contributions.

For a complete walkthrough of how tax withholding interacts with your high-3 salary, multiplier, and other pension variables, the FERS Annuity Guide covers the full audit framework.

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