Year one costs more than you think (especially for feds)
The first year of retirement is rarely the cheapest — often it’s the most expensive and most cash-flow-awkward. Deferred trips and projects hit at once, and for federal retirees OPM’s interim payments cover only 60–80% of your annuity for weeks while your TSP stays locked. The lump-sum leave payout helps, but it’s taxable and can spike your bracket.
1. The year nobody budgets for
Most retirement planning is about the long run: your high-3, your years of service, your TSP balance, your safe withdrawal rate over 30 years. Almost no one plans for the first year — and for federal retirees in particular, year one is the strangest and often most expensive year of the whole retirement. It combines a spending surge with a temporary income squeeze, and the two collide in the first 90 days.
On the spending side, the deferred trips, the home projects, and the purchases you put off while working tend to happen at once, in the active early years. On the income side, the federal retirement system makes you wait: OPM pays only a partial annuity for weeks or months while it processes your application, and your TSP isn’t immediately reachable either. Higher spending, lower and slower income — that’s the year-one crunch.
None of it is a problem if you see it coming. This dispatch covers the spending surge, the federal cash-flow gap that catches so many new retirees, and the lump-sum leave payout that helps bridge it — with the tax wrinkle that comes attached.
For all the cash-flow awkwardness of federal year one, there’s a genuine advantage worth naming. Private-sector early retirees who leave before 65 face a brutal healthcare problem: they must buy coverage on the open market or through COBRA, often for thousands of dollars a month, until Medicare begins. Federal retirees who meet the FEHB five-year rule simply keep their FEHB coverage into retirement, uninterrupted, at the same premium share — the government keeps paying its portion. Even during the interim-payment period, your FEHB premiums are deducted from day one and your coverage never lapses. So while you’re managing the income gap, you are not also scrambling for health insurance, which is one of the single largest costs and biggest sources of stress for non-federal early retirees. It’s a reason the federal year-one crunch, real as it is, is far more manageable than most.
2. The spending surge
The idea that spending drops the day you retire is half-true. Over the long run, real spending does decline — but the start of retirement often runs hot, in what advisors call the retirement honeymoon.
Deferred everything, all at once. The trip you’ve talked about for a decade, the kitchen you kept meaning to redo, the new vehicle, the hobby you finally have time for — these tend to cluster in the first year or two, when you have both the time and the health to enjoy them.
Setup costs. A move, new equipment, helping an adult child with a down payment or a wedding, the gym membership, the class. The transition itself has one-time costs that a steady-state budget never captures.
It’s the go-go years at full speed. This surge isn’t a mistake to be corrected — it’s the spending smile’s high left side, the active years you saved for. The point isn’t to suppress it; it’s to budget for it honestly instead of assuming year one looks like year fifteen. (See the spending smile.)
3. The federal cash-flow gap
Here’s the part that’s unique to federal retirement, and the part almost nobody prepares for: your income doesn’t arrive in full on day one.
TSP access: ~6–10 weeks (agency must notify TSP, then withdrawals process)
FEHB: continues uninterrupted — premiums deducted from day one
Interim payments. While OPM adjudicates your case, it pays an estimated 60 to 80 percent of your net annuity. For a straightforward case that’s often 60 to 90 days; cases with a survivor election, military buyback, or court order can stretch to six to nine months. Only federal tax is withheld during this period, and the amount is a partial estimate — not your full check.
The TSP isn’t instant either. Your agency has to notify the TSP of your separation, which can take 30 to 60 days, and withdrawals then take additional days to process. Plan on roughly six to ten weeks before TSP funds are actually in hand — so don’t count on the TSP to cover your first month or two.
The back-pay catch. Once your case is finalized, OPM pays the difference retroactively to your retirement date — good news, except it arrives as a single lump sum in one tax year and can bump you into a higher bracket. Adjust withholding for that year accordingly.
The cruel arithmetic of federal year one: your spending runs high while your income runs at 60–80% and your TSP is weeks out of reach. The fix isn’t a better annuity — it’s cash in the bank before you walk out the door.
4. The leave payout — and your year-one picture
The system does hand you one bridge: your unused annual leave, paid as a lump sum, usually within a pay period or two — often faster than your first annuity check.
Year-One Cash-Flow Estimator
Estimates your lump-sum annual leave payout (salary ÷ 2,087 × hours), a tax set-aside, and a recommended cash cushion against the interim-pay gap. Illustration only — your timeline and taxes will vary. Not advice.
Hourly rate = salary ÷ 2,087. Tax set-aside shown at 28% (a 25–30% planning midpoint); the payout is taxed as ordinary income. Cash cushion is 3–6 months of essentials to bridge interim pay and TSP delays.
A short checklist turns year one from a scramble into a non-event:
Bank 3–6 months of expenses before you retire. This is the single most important move. Cash in checking — not the TSP, not investments — to cover the interim-pay gap without selling anything or panicking.
Treat the leave payout as taxable income, not a bonus. Set aside 25–30% for taxes, then use the rest as part of your bridge. (See where the OPM backlog stands.)
Budget year one separately. Add your one-time surge costs to your ongoing budget and fund them deliberately, rather than discovering them as a withdrawal spike.
Set up FEHB and BENEFEDS payments early. Your coverage continues, but make sure premium payments are arranged so nothing slips during the transition.
Year one carries a real tax trap that’s easy to miss because it’s the sum of several pieces. In the year you retire you may have: a partial year of salary, a large lump-sum annual leave payout taxed as ordinary income, possibly a retroactive OPM back-payment if your case finalizes that year, and the start of your annuity — potentially a one-time stack of income well above your normal retirement level. That can push your retirement year into a higher bracket than any year that follows, and it interacts with everything from Social Security taxation to, two years later, IRMAA. The fix is to see it coming: estimate your total year-one income including the leave payout and any back pay, adjust your withholding, and consider whether discretionary income events you control — like a large Roth conversion — are better deferred to year two when your income normalizes. Don’t let the most predictable high-income year of your retirement surprise you.
The interim-payment percentages and processing times here reflect OPM’s current practice and a 2026 backlog that has lengthened complex-case timelines; your experience depends on your agency and the complexity of your case. The leave-payout formula (salary ÷ 2,087 × hours) and the supplemental withholding rate are current federal rules, but tax outcomes depend on your full return. Verify specifics with your agency’s HR, OPM, and a tax professional, and build your cash cushion regardless of how fast you expect your case to move.
Frequently asked questions
Does retirement really cost more in the first year?
For many people, yes. The first year of retirement is frequently one of the most expensive, not the cheapest. Several things converge. There’s a spending surge often called the retirement honeymoon: the trips, home projects, and purchases deferred during working years finally happen, and they tend to cluster in the early, healthiest go-go years. There are one-time setup costs — new hobbies, a vehicle, helping adult children, sometimes a move. And for those retiring before 65, there can be a healthcare bridge to fund, though federal retirees keep FEHB. On top of all that, federal retirees face a cash-flow squeeze unique to the system: OPM pays only a partial interim annuity while your application is processed, and your TSP isn’t immediately accessible. So year one combines higher-than-normal spending with lower-than-normal, slower-arriving income. Planning a flat budget for retirement and assuming year one looks like every other year is one of the most common and avoidable financial surprises new retirees face.
What are OPM interim payments and how long do they last?
When you retire from federal service, OPM has to process your retirement application before paying your full annuity, and that takes time — commonly 60 to 90 days for straightforward cases, but six to nine months or more for complex ones involving survivor elections, military buyback, or court orders. During that wait, OPM pays “interim payments,” typically about 60 to 80 percent of your estimated net annuity, so you’re not left with nothing. There are important details: only federal income tax is withheld from interim pay (not state tax or FEGLI), but your FEHB premiums are deducted from day one and your health coverage continues uninterrupted. Once your case is fully adjudicated, OPM pays you retroactively for the gap between the interim amount and your full annuity, back to your retirement date. That back payment is welcome, but it lands as a single lump sum in one tax year and can push you into a higher bracket, so it’s worth adjusting withholding for that year. The practical takeaway is to have a cash cushion ready before you retire.
How is my lump-sum annual leave payout taxed?
Your unused annual leave is paid out as a lump sum when you separate, usually within one to two pay periods — often faster than your first annuity payment, which is why it can serve as an income bridge during the OPM processing wait. The amount is your unused leave hours multiplied by your hourly rate, where the hourly rate is your annual salary divided by 2,087. The payout is fully taxable as ordinary income, and federal withholding is typically applied at the 22 percent supplemental wage rate. Because a large leave balance can produce a sizeable check, and because it stacks on top of any partial-year salary you earned before retiring, it can push your income for that year into a higher bracket — so setting aside roughly 25 to 30 percent for federal and state taxes is prudent. It’s smart money in the sense that it’s pay you earned, but treat it as taxable income to plan around, not a windfall to spend in full, and remember it’s a one-time payment, not an extension of your salary or service credit.