How to Organize Federal Retirement Tax Documents Before Meeting Your CPA

If you're a federal retiree heading into your first post-separation tax season and you want to avoid paying CPA rates for document sorting, start by separating your records into three piles: one for each agency that now pays you. OPM sends your annuity 1099-R. The TSP recordkeeper sends a separate 1099-R for each type of distribution. SSA sends an SSA-1099 (or SSA-1042S for non-resident withholding). None of these agencies coordinates with the others, and none of them sends you a single summary of your total retirement income. That's the job you're doing before you walk into the CPA's office — or it's the job you're paying them $200–$500/hour to do for you.

Why Federal Retirement Tax Prep Is Different from Career Tax Prep

During your federal career, tax preparation was straightforward. Your agency issued one W-2, withheld federal and state taxes, deducted FEHB premiums pre-tax, and handled everything through a single payroll system. Your CPA received one document and filed one return.

In retirement, the landscape fragments:

• OPM issues your annuity 1099-R with distribution codes and a taxable amount calculated using the Simplified Method — but the first 1099-R may cover both interim pay and finalized annuity payments, which have different withholding rules
• The TSP recordkeeper issues separate 1099-R forms for each type of distribution you took (periodic payments, single withdrawals, Roth withdrawals), each with its own distribution code
• SSA issues an SSA-1099 showing your total Social Security benefits and any voluntary withholding you elected on W-4V
• Your state may or may not tax each of these income streams, and some states treat TSP withdrawals differently depending on whether the money stayed in the TSP or was rolled into a commercial IRA

A CPA who doesn't specialize in federal retirement typically needs two to four hours just to sort through these documents and understand which forms control which income streams — before doing any actual tax work. That research time is billable.

The Three-Pile Organization System

Pile 1: OPM Annuity Records

Gather these documents before your CPA meeting:

• 1099-R from OPM (arrives by January 31) — check that the taxable amount in Box 2a reflects the Simplified Method calculation, not the total gross
• CSA 1099-R or CSF 1099-R — CSA for CSRS annuities, CSF for FERS annuities; the prefix matters because cost basis calculations differ
• Your annuity computation letter (the finalized annuity statement from OPM) — this shows your monthly gross, your contributions to the retirement fund (cost basis), and the date your annuity started
• Interim pay records — if you retired mid-year and received interim payments before your annuity was finalized, note the months covered; OPM only withholds federal income tax during interim pay (no state tax, no insurance premiums)
• Current W-4P election — what you told OPM to withhold from your annuity; many retirees are still on the default single/no adjustments setting and don't realize it

Pile 2: TSP Distribution Records

• 1099-R(s) from the TSP — you'll get a separate form for each type of distribution in the calendar year; common distribution codes include 7 (normal), 2 (early), 1 (early, no exception), and G (rollover)
• Record of any rollovers — if you rolled TSP funds into a commercial IRA, note the receiving institution, the amount, and the date; this matters for states that exempt TSP withdrawals but not IRA withdrawals
• Roth TSP records — if you have Roth contributions, bring the TSP 1099-R and your Roth account records; your CPA needs to verify the distribution's taxable treatment and ordering rules
• Current W-4R election — what you told the TSP to withhold from nonperiodic distributions and eligible rollover distributions; periodic pension or annuity payments use W-4P settings instead

Pile 3: Social Security and Other Income

• SSA-1099 (or SSA-1042S) — shows your total benefits received, any retroactive payments (mark these separately for your CPA), and any voluntary withholding elected via W-4V
• Any retroactive Social Security payment from the January 2025 WEP/GPO repeal — note the total amount and that it's taxable in the year received, not spread across the months it covers
• W-4V election — the form you filed with SSA to elect 7%, 10%, 12%, or 22% withholding from your benefits; if you haven't filed one, Social Security withholds nothing
• Other income documents — any W-2 from part-time work, 1099-INT from savings, 1099-DIV from investments, or 1099-R from a non-TSP retirement account

The Pre-Meeting Worksheet

Before your appointment, answer these questions and bring the answers in writing:

1. What was your last day of federal service? (determines whether your 1099-R from OPM covers a partial year or a full year)
2. Did you receive interim pay? If so, how many months? (OPM only withheld federal tax during interim — state tax and insurance premiums were deferred and deducted from your first regular payment)
3. Did you roll any TSP money into a commercial IRA? Which institution, how much, when? (critical for states that exempt TSP but not IRA distributions)
4. What was your state tax residence for the tax year? (your tax residence determines state treatment of all three income streams)
5. Did you receive a retroactive Social Security payment after the WEP/GPO repeal? How much? (your CPA needs to know this was a lump sum received in 2025, taxable in 2025)
6. What are your current withholding elections on W-4P, W-4R, and W-4V? (most CPAs will recommend adjusting at least one of these)

How This Saves You Money

A federal retirement CPA engagement typically runs six to eight hours for a first-year retiree who arrives with an unsorted box of documents. The breakdown is roughly:

• 2–3 hours: identifying and organizing documents, researching OPM-specific forms and distribution codes
• 1–2 hours: calculating the Simplified Method for the annuity cost basis, running the provisional income formula for Social Security taxation
• 1–2 hours: preparing the return and checking state-level treatment
• 1 hour: reviewing with the client and discussing withholding adjustments for the following year

The first block — identifying and organizing — is the part you can eliminate by showing up prepared. If your CPA charges $300/hour, that's $600–$900 you're saving by spending an evening organizing your documents and answering six questions. The CPA starts on the calculations, not the research.

When You Need More Than Organization

Document organization gets you ready for the meeting. It doesn't answer the strategic questions that require professional judgment:

• Should you take TSP distributions as periodic payments (withholding based on your W-4P election) or a single withdrawal that is an eligible rollover distribution (20% mandatory withholding, but simpler)?
• Is it worth rolling TSP into an IRA for investment flexibility, or does your state's pension exemption make leaving it in the TSP the better tax play?
• Should you do Roth conversions during the lower-income years between retirement and Required Minimum Distributions?
• How should you coordinate Social Security claiming age with your CSRS annuity for optimal provisional income management?

These are CPA questions. The toolkit handles everything upstream — understanding the forms, mapping the withholding defaults, organizing the documents — so your CPA's time goes to questions like these rather than to administrative orientation.

The Taxes on Federal Retirement toolkit includes a tax forms tracker, a first-year filing prep worksheet, and a withholding coordination worksheet that walk through exactly this process. You fill in your numbers, bring the completed worksheets to your CPA, and the meeting starts at strategy instead of sorting.

Frequently Asked Questions

What if I retired mid-year and have both a W-2 and a 1099-R?

This is normal for the year of separation. Your final W-2 covers your salary through your last day of service. Your OPM 1099-R covers interim pay and/or finalized annuity payments from your retirement date through December 31. Your CPA needs both to file the split-year return correctly. Make sure the combined withholding from both documents is enough to cover your actual liability — most retirees underwithhold in the separation year because OPM's interim pay withholding is lower than their agency payroll withholding was.

Do I need to keep my SF-2801 or SF-3107 retirement application for tax purposes?

Not for filing, but yes for reference. Your retirement application contains the starting date and contribution amounts that feed the Simplified Method calculation. If OPM's 1099-R ever shows an incorrect taxable amount (it happens), your application records are how you prove the correct cost basis to the IRS.

Why does my OPM 1099-R show a different taxable amount than my gross annuity?

Because of the Simplified Method. The IRS allows you to recover your own contributions to the retirement fund tax-free over your expected payout period. The difference between your gross annuity and the 1099-R taxable amount is your monthly tax-free recovery. Once you've recovered your total contributions (typically 25–30 years of payments under FERS, longer under CSRS), the full annuity becomes taxable.

How do I know if my state exempts federal pension income?

States fall into five categories: no income tax at all (Florida, Texas, etc.), full exemption for federal pension income (New York, Illinois, etc.), partial exemption with a cap (Maryland, Virginia, etc.), taxation with a deduction (many states), and full taxation (California, Vermont, etc.). The treatment of TSP withdrawals and Social Security may differ from the pension treatment within the same state. A 50-state directory — like the one in the federal retirement tax toolkit — maps all three income streams per state so your CPA doesn't have to research your state's rules from scratch.

Should I organize documents differently if I'm under CSRS instead of FERS?

The three-pile system works the same way, but your CSRS-specific items include a higher cost basis (CSRS contributions were 7–8% of salary vs. 0.8–4.4% for FERS), no TSP agency matching contributions to track, and potentially Social Security records that only matter after the January 2025 WEP/GPO repeal. If you're CSRS and receiving Social Security for the first time due to the repeal, make sure to flag the retroactive payment separately — your CPA needs to know that's a 2025 lump sum, not a monthly income figure.

What if I don't have a CPA yet — how do I find one who understands federal pensions?

Ask whether they regularly prepare returns for OPM annuitants. Specifically ask if they've worked with the Simplified Method for federal pension cost basis recovery and whether they know how TSP distribution codes differ from commercial 401(k) codes. If they're not sure, they're competent but not specialized — and your organized document package becomes even more valuable because it reduces the research they'd otherwise need to do at your expense.