FERS Deferred Retirement Taxes: Federal, State, and Withholding Rules

You left federal service years ago, left your contributions in the retirement fund, and now your deferred annuity is about to start. Before that first OPM check arrives, you need to know exactly how it gets taxed — because the rules aren't the same as a paycheck, and the state treatment varies wildly depending on where you live.

How Federal Taxes Work on a Deferred Annuity

Your FERS annuity is taxed as ordinary income at your marginal federal rate. OPM sends you a 1099-R each January reporting the previous year's gross annuity, the taxable portion, and any federal tax withheld.

There is a small tax-free component. Because you contributed to FERS with after-tax dollars during your career (FERS employee contributions are not pre-tax like a traditional 401(k)), you've already paid tax on a portion of your annuity. OPM uses the Simplified Method from IRS Publication 721 to calculate your monthly tax-free recovery amount. It divides your total after-tax contributions by a factor based on your age at annuity start — for example, 260 months for a 62-year-old annuitant without a survivor benefit. When a survivor benefit is elected, the factor is based on the annuitants' combined ages. That fraction of each monthly payment is tax-free until your contributions are fully recovered.

For most deferred retirees, the tax-free portion is modest. If you contributed $45,000 over 12 years of service and your recovery period is 260 months, roughly $173 of each monthly check is tax-free. The rest is fully taxable.

Setting Up Federal Tax Withholding

When your deferred annuity begins, OPM applies default withholding based on claiming single with no adjustments unless you submit a W-4P. You can update your withholding at any time through Services Online at retire.opm.gov or by mailing a revised W-4P.

If you have other income sources — a private-sector pension, investment income, Social Security — coordinate your withholding across all of them. OPM doesn't know about your other income, so the default withholding on your annuity alone may leave you underpaying. Quarterly estimated tax payments cover the gap.

State Tax Treatment Varies Dramatically

Here's where deferred retirees often get surprised. Some states exempt government pensions entirely, others tax them like any other income, and a handful fall somewhere in between.

States with no income tax — Florida, Texas, Nevada, Wyoming, South Dakota, Alaska, Washington, New Hampshire, and Tennessee — obviously don't tax your annuity. Several states that do have an income tax still fully exempt federal pensions: Illinois, Mississippi, Pennsylvania, and New York exempt federal pension income. New York's $20,000 pension-and-annuity exclusion generally applies to other eligible income for taxpayers age 59½ or older.

On the other end, California, Vermont, and Nebraska generally include FERS annuities in taxable income. Connecticut allows a subtraction for eligible pension and annuity income; for tax year 2025, it can reach 100% below federal AGI of $75,000 for single filers or $100,000 for joint filers, then phases out to zero by $100,000 or $150,000, respectively.

If you separated from federal service in one state and plan to collect your deferred annuity while living in another, the state where you reside when you receive the payments is what matters — not where you worked or where the federal agency was located. Under federal law (4 U.S.C. § 114), no state can tax retirement income of a nonresident, which means your former duty station's state cannot reach your annuity once you've moved.

The Refund Tax Trap vs. Deferred Annuity Taxation

Some former employees who took an SF 3106 contribution refund instead of keeping their deferred annuity eligibility were surprised by the tax hit. On a refund, the accrued interest portion is taxable immediately — for a direct payment of $200 or more in taxable interest, OPM withholds 20% for federal tax, and if you're under 59½, you may face an additional 10% early distribution penalty unless you roll the interest into an IRA or TSP.

The deferred annuity sidesteps this entirely. You pay tax only as monthly payments come in, spread across your retirement years, and there's no early distribution penalty regardless of when your annuity starts because OPM annuities are exempt from the 10% penalty.

Social Security and Your Deferred Annuity

A FERS deferred annuity by itself did not trigger the Windfall Elimination Provision or Government Pension Offset because FERS-covered employees pay Social Security taxes. The Social Security Fairness Act, signed January 5, 2025, repealed those offsets for benefits payable from January 2024 onward, including for people with non-covered government pensions such as CSRS. If you built Social Security credits through private-sector work before or after federal service, those benefits are calculated at the full formula. Previously offset beneficiaries received retroactive adjustments back to January 2024.

Both your FERS annuity and Social Security are taxable income, and up to 85% of your Social Security benefit becomes taxable when your combined income exceeds certain thresholds. Plan your withholding across both income streams.

The Leaving Federal Service Early guide includes a tax planning worksheet that walks through the federal and state calculations for your specific deferred annuity, including the Simplified Method recovery and coordination with Social Security.

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