Interim Annuity Payments: What OPM Pays Federal Retirees While Their Case Is Processed | Fed Pilot
You submitted your retirement paperwork. Your last paycheck cleared. The agency threw you a goodbye party. Then weeks turned into months, and the full pension check still hasn’t arrived. Instead, you’re receiving a smaller, partial payment from OPM — and you’re not sure if that’s the new normal or a temporary fix. This in-between phase has a name: interim annuity payments. Almost every federal retiree experiences it, and understanding what to expect can prevent panicked phone calls and bad financial decisions.
The short answer: When a federal employee retires, OPM pays interim annuity payments — roughly 60–80% of your estimated full annuity — while processing your full retirement case. Interim payments typically begin 6–8 weeks after your retirement date and last 2–6 months. Once OPM finalizes your case, you receive the corrected monthly amount plus a retroactive lump sum covering the difference from day one.
Key Takeaways
- Interim payments cover approximately 60–80% of your estimated full annuity — OPM deliberately errs low to avoid overpayments that must later be recouped from the retiree.
- FEGLI premiums, state income tax withholding, and the Special Retirement Supplement are excluded from interim payments; all begin (and are paid retroactively) only after full adjudication.
- As of May 2026, OPM’s retirement backlog has dropped below 50,000 cases; most spring 2026 retirees should plan for 2–6 months of interim payments.
- The retroactive lump sum covers the full gap between interim and final annuity from your retirement start date.
- Build a 4–6 month cash cushion before retiring — the lump-sum annual leave payout often covers a significant portion of the gap.
Why Does OPM Pay Interim Annuity Payments Instead of Your Full Pension?
When a federal employee retires, the agency forwards the retirement application package to the Office of Personnel Management. OPM then verifies service history, calculates the High-3, applies sick leave credit, processes survivor benefit elections, coordinates FEHB premium deductions, and finalizes hundreds of small line items. That full process takes anywhere from 60 days to over a year, depending on complexity and backlog.
To avoid leaving retirees with no income during that period, OPM authorizes interim payments — estimated annuity payments designed to bridge the gap until your case is fully adjudicated. Once finalized, OPM trues you up retroactively with a lump sum covering the difference from your annuity start date.
As of May 2026, OPM’s retirement backlog has dropped below 50,000 cases for the first time since November 2025, with processing finally outpacing new claims. Federal employees retiring this spring should still plan for interim payments lasting two to six months.
How Does OPM Calculate the Interim Payment Amount?
OPM estimates interim payments based on the data available before full verification:
- Estimated High-3 from the salary history submitted with your retirement package.
- Estimated years of service, before final adjustment for sick leave, unpaid deposits, or refunded service.
- Standard deductions, including federal income tax (single rate, no withholding adjustments) and FEHB premium if applicable.
The result is intentionally conservative — OPM errs low to avoid overpayments. Interim payments usually land in the 60–80% range, but can be as low as 50% if OPM has limited data. For a retiree expecting a $4,000 monthly annuity, interim payments might be $2,400–$3,200 per month. The shortfall accrues until OPM finalizes your case.
What’s Missing From Interim Annuity Payments?
Several components of your full annuity are not included in interim payments:
- FEGLI premiums are not deducted during the interim period. If you elected to keep coverage in retirement, premiums will be deducted retroactively once your case is finalized — sometimes producing a smaller-than-expected first full annuity payment.
- State income tax withholding is typically not applied. Consider making estimated state tax payments during the interim period to avoid a surprise tax bill.
- Federal income tax withholding uses a default (married, no allowances). If your real tax situation differs, you may underpay or overpay.
- The Special Retirement Supplement (SRS) is generally not paid during the interim period. If you’re entitled to SRS, it begins only after case finalization, with a retroactive payment covering missed months.
- FERS Annuity Supplement adjustments, survivor benefit reductions, and other custom calculations wait until full adjudication.
This is why retirees with SRS entitlement should plan their first six months assuming only the base pension. The SRS retroactive lump sum, when it arrives, is a bonus — not a budget item.
When Do Interim Annuity Payments Start — and How Long Do They Last?
A typical retirement payment timeline:
- Month 1: No annuity payment yet. You receive your final paycheck and lump-sum payout for unused annual leave. See our piece on annual leave payout for what to expect there.
- Months 1–3: OPM begins interim payments, usually starting in the second month after retirement. The first payment often arrives 6–8 weeks after your retirement date and typically includes a retroactive amount covering your annuity start date.
- Months 3–8: Interim payments continue at the reduced rate while OPM reviews your case in detail.
- Final adjudication: OPM finalizes your annuity, issues a benefits booklet, transitions you to your full monthly payment, and sends a retroactive lump sum for the difference. The lump sum often arrives one or two months after the first full payment.
Cases involving military service deposits, refunded service redeposits, divorces with court-ordered apportionments, or disability retirement applications take longer — sometimes a year or more.
What Should You Do If Your Interim Payments Are Wrong or Haven’t Started?
Your Interim Payments Haven’t Started
If 90 days have passed since your retirement date and you’ve received no interim payments, contact OPM’s Retirement Information Office at 1-888-767-6738. Ask them to verify your case has been received from your agency. The most common cause of delays is the agency, not OPM — packages sometimes sit on a personnel office desk for weeks.
Your Interim Payment Seems Too Low
Interim payments below 50% of your expected annuity usually signal incomplete data. Check whether OPM has your full service history, including any post-1989 military service deposits or buyback documentation. Submit missing forms (such as SF 3108 for FERS military deposits) through your former agency’s retirement office.
You Need Money Before Interim Payments Start
Federal employees facing a cash crunch can apply for an interim emergency payment from OPM if more than 60 days have passed without a regular interim payment. The more common bridge is the lump-sum annual leave payment plus a TSP withdrawal — see our guides on TSP withdrawal options and retirement tax planning first.
Your Final Annuity Is Lower Than Your Interim Payment
Rare, but it happens. OPM typically allows several months of reduced payments to cover the overpayment rather than demanding a lump sum. If your final annuity is unexpectedly low, request a written explanation from OPM and review it against your retirement estimate. Errors in service credit, High-3 calculation, or sick leave conversion are correctable — but you have to ask.
How Should You Budget for the Interim Annuity Period?
The single most useful preparation is building a six-month financial bridge before retiring:
- Estimate your true monthly retirement expenses after retirement (mortgage, FEHB, utilities, food, etc.).
- Assume interim payments will cover 60% of your full annuity for the first 4–6 months.
- Calculate the gap between your expenses and that interim income.
- Set aside cash to cover the gap — typically 4–6 months of partial pension shortfall.
For a retiree expecting $5,000/month in full annuity: 4–6 months at $3,000 interim = a $12,000–$18,000 shortfall before tax adjustments. A $15,000 cash cushion in a high-yield savings account is a reasonable target. Your lump-sum annual leave payout often covers a significant portion.
How Do You Track Your OPM Retirement Case Status?
For case-in-process status, the most reliable channel is OPM’s Retirement Information Office at 1-888-767-6738 or retire@opm.gov. Expect hold times, especially in spring and after holidays. Once your case is finalized and you have a CSA number, servicesonline.opm.gov is useful for managing your annuity account (1099-R, withholding, direct deposit) — but during the interim period, it generally does not display a real-time processing-stage indicator.
Frequently Asked Questions
Is the retroactive lump sum taxed as ordinary income?
Yes. The retroactive payment is treated as ordinary income in the year received. If it pushes you into a higher bracket, consider adjusting your federal withholding for that year.
Will FEHB premiums be deducted from my interim payments?
Yes. Unlike FEGLI, FEHB premiums are deducted from interim annuity payments from day one. Your FEHB coverage continues uninterrupted from the start of retirement.
Does the Special Retirement Supplement start during the interim period?
Generally no. The SRS begins after your case is fully adjudicated, and missed months are paid retroactively. Don’t budget for SRS income until you’ve received your final adjudication letter.
What if my retirement application has an error — can OPM withhold interim payments?
OPM can delay or reduce interim payments if key data is missing or inconsistent. Your agency’s retirement office is the first call — they can submit corrections directly to OPM on your behalf.
What happens to my TSP once I retire — does it stop automatically?
TSP is separate from OPM’s adjudication process. Your account remains yours after retirement; payroll contributions stop, but the balance stays invested until you initiate withdrawals. See our TSP withdrawal guide for options.
Can I apply for an emergency payment if my interim payments are delayed beyond 90 days?
Yes. OPM offers an interim emergency payment for documented financial hardship when regular interim payments haven’t started after 60 days. It’s not routine, but it exists — contact OPM’s Retirement Services directly.
Interim annuity payments are a feature, not a bug, of the federal retirement system. They prevent income gaps but create a multi-month period where your finances feel uncertain. Plan for it: build the cash bridge, expect 60–80% of your full annuity for the first 4–6 months, and track your case at servicesonline.opm.gov.
Fed Pilot’s free retirement workshops walk through the full OPM retirement timeline, including the financial planning needed to bridge the interim period.
