Federal Retirement Tax Planning Checklist: Organize Before You File

Why Federal Retirees Need a Tax Checklist

During your career, tax planning was straightforward: one employer, one W-2, one set of withholdings. In retirement, you're managing three or more income streams, each with its own tax form, its own withholding mechanism, and its own rules. The complexity isn't in any single piece — it's in coordinating them all so you don't overpay, underpay, or miss a filing requirement.

This checklist covers the key steps from pre-retirement through your first post-retirement tax filing.

Pre-Retirement Tax Actions (1–6 Months Before Separation)

Download your eOPF records. Access to your electronic Official Personnel Folder is permanently revoked upon separation. Download your complete file — especially every SF-50, your certified service history, and records of any civilian or military service deposits. You'll need these to verify your cost basis (total after-tax contributions) for the Simplified Method calculation.

Verify your employee contribution total. Your after-tax contributions to the FERS or CSRS retirement fund determine the tax-free portion of your annuity. Check your records before you lose eOPF access. If the number looks wrong, contact your payroll office while you're still an employee and can get it corrected.

Review your TSP balance composition. Know how much is in your traditional (pre-tax) TSP and how much is in your Roth TSP. This matters because traditional TSP withdrawals are fully taxable, while qualified Roth withdrawals are tax-free. If you're considering in-plan Roth conversions (available since January 2026), plan the timing relative to your separation date.

Estimate your first-year income. Your first calendar year of retirement will likely include both final wages (W-2) and annuity payments (1099-R). Map out what you expect to receive from each source — including interim pay at the reduced rate — so you can calibrate withholding before you separate.

At Retirement: Set Your Withholding

Submit Form W-4P to OPM. Don't let OPM default you to "single with no adjustments." File a W-4P through Services Online or by mail with your correct filing status and — critically — account for your other income sources in Step 4.

File Form W-4V with SSA (if claiming Social Security). Choose one of the four withholding rates (7%, 10%, 12%, or 22%). If you aren't claiming Social Security yet, revisit this when you do.

Understand TSP withholding rules. Eligible rollover distributions paid to you generally have mandatory 20% federal withholding on the taxable amount. Other nonperiodic TSP payments generally default to 10%, while periodic payments use periodic-payment withholding. Roth withdrawals from the TSP are generally not subject to withholding if the account meets the five-year aging and age-59½ requirements.

Request state tax withholding from OPM if you live in a state that taxes federal pension income. This is a separate request from the federal W-4P.

During Interim Pay (Months 1–5)

Track what's being withheld — and what isn't. During interim pay, OPM withholds only federal income tax. No state tax, no insurance premiums. Keep a running total of the state tax gap so you can address it through estimated payments.

Consider quarterly estimated payments. If you retired early in the year and will have several months of interim pay with no state withholding, a quarterly estimated payment (Form 1040-ES) prevents an underpayment penalty.

Set aside cash for the premium catch-up. When your annuity is finalized, OPM deducts all accumulated health and life insurance premiums from your first regular payment. This isn't a tax issue directly, but the reduced cash flow in that month can make it harder to cover any tax obligations due at the same time.

Post-Finalization: Verify and Calibrate

Compare your finalized annuity to the interim payments. OPM pays a retroactive catch-up once your annuity is finalized. That catch-up appears in Box 1 of your 1099-R for the year. Make sure your withholding covers the tax on the total amount, not just the reduced interim payments.

Check your 1099-R cost basis. Verify that Box 5 (Employee Contributions / Tax-Free Recovery) reflects the correct amount based on the Simplified Method. If it's zero or wrong, contact OPM to correct it before filing your return.

Recalibrate W-4P after the first year. Once you have a full year's worth of actual numbers — your real annuity amount, real Social Security benefit, actual TSP distributions — adjust your W-4P to match. First-year withholding is always a best guess; second-year withholding can be precise.

Tax Season: Collect and Reconcile

Gather all tax documents by mid-February:

• Form W-2 (final wages from your agency — arrives by January 31)
• Form CSA-1099-R (annuity income from OPM — arrives by January 31)
• Form 1099-R (TSP distributions — arrives by January 31)
• Form SSA-1099 (Social Security benefits — arrives by January 31)
• Any 1099-INT, 1099-DIV, or other investment income forms

Reconcile the 1099-R against your records. If you retired mid-year, your first CSA-1099-R covers only the months you received annuity payments. Verify the gross amount matches your interim payments plus the retroactive catch-up.

Calculate your Simplified Method exclusion. Use the IRS Pub 721 worksheet to confirm the tax-free portion of your annuity. Cross-reference with Box 5 on the 1099-R.

Evaluate the lump-sum election (if applicable). If you received a retroactive Social Security payment under the Fairness Act, check whether the IRC Section 86(e) lump-sum election reduces your tax by using each prior year's income in the calculation rather than treating the payment entirely as current-year income.

File by April 15. If you need more time to sort out a complex first-year return, file Form 4868 for an automatic six-month extension — but pay your estimated tax by April 15 to avoid interest and penalties.

Ongoing Annual Actions

Review withholding each January when you get your new 1099-R and SSA-1099. Adjust the W-4P or W-4V if your income changed, you started or changed TSP distributions, or you moved states.

Watch for RMD deadlines. If you have a traditional TSP balance, required minimum distributions start at age 73 (or 75 if born after 1959). These mandatory distributions increase your taxable income whether you want them to or not.

Track your cost basis recovery. Once your total Simplified Method exclusions equal your original after-tax contributions, the exclusion stops and your entire annuity becomes 100% taxable. Keep a running total so the transition doesn't catch you off guard.

The Taxes on Federal Retirement toolkit consolidates all of these steps into structured worksheets — a tax forms tracker, a withholding coordination worksheet, and a first-year filing prep guide — so nothing falls through the cracks during the transition.