Can I withdraw from TSP before age 59½ after retiring?

If you separate from federal service during or after the calendar year you turn 55, you qualify for the Rule of 55 — penalty-free TSP withdrawals without the standard 10% early-withdrawal penalty. You don't have to be 55 on your separation date, just 55 somewhere in that calendar year. Law enforcement officers, firefighters, and air traffic controllers have a more favorable rule: the Rule of 50. If you retire before the year you turn 55 and need TSP income, a 72(t) SEPP plan is available but locks you in for at least 5 years or until 59½.

How does a step increase or promotion affect my retirement timing?

Your FERS annuity is based on your high-3 salary — the average of your three highest consecutive years of basic pay. If you receive a promotion 18 months before retiring, only 18 months of the new salary flows into the high-3. Waiting until you have 36 months at the promoted grade maximizes the benefit. For a promotion worth $20,000/year, timing it right can add $3,000–$5,000/year to your lifetime annuity. Similarly, retiring before a step increase that would raise your high-3 costs you that increment permanently.

When to Retire from the Federal Government

Q: What is the best month to retire from the federal government?

For most FERS employees, retiring at the end of December or January is most common because the leave year ends January 9, 2027, and retiring before that date preserves any annual leave balance above the 240-hour carryover cap. Beyond leave-year timing, the best month depends on your step-increase schedule, any pending promotions, and your sick-leave balance — all of which affect the high-3 salary and service-credit math permanently.

Q: Does retiring at the end of the month really make a difference?

Yes. Your FERS annuity starts on the first day of the month following retirement — regardless of whether you retire on the 1st or the 31st (except if you retire on the 1st, 2nd, or 3rd, your annuity starts the next day). Retiring January 15 vs. January 31 gives you the same February 1 annuity start, but you collect 16 extra days of employment salary by retiring on the 31st. Always retire at or near the end of the month.

Q: How do I time my retirement to qualify for the FERS supplement?

The FERS Special Retirement Supplement pays a Social Security bridge from retirement until age 62. To qualify, you need an immediate, unreduced annuity — meaning MRA (age 55–57 by birth year) plus 30 years of service, or age 60 with 20 years. MRA+10 (10–29 years at MRA) does not qualify for the supplement. For a GS-14 with 28 years of service, the supplement is worth roughly $72,000–$108,000 over a 5-year bridge — so checking whether you qualify for a full vs. reduced retirement before retiring is critical.

Q: How does sick leave affect my FERS retirement date?

Unused sick leave converts to additional service credit at retirement: 174 hours equals one additional month. Partial months are dropped — only complete months count. If you have 150 hours of sick leave and earn 4 hours per pay period, waiting just one biweekly period adds a full month of credit permanently. Use the sick leave calculator to find your closest clean-month threshold before choosing your retirement date.

FERS retirement timing decisions that compound. Each one individually seems minor — combined, they can add up to $20,000–$50,000 in real dollars over the first few years of retirement.

The core problem: Federal retirement has at least six interacting timing variables — annual leave, annuity start date, high-3 salary, sick leave conversion, FEHB, and TSP penalty rules. A generalist advisor rarely models all six together. A federal-benefits specialist has optimized this dozens of times.

1. Annual leave: the use-or-lose deadline and lump-sum payout

When you retire, you receive a lump-sum payment for all unused annual leave — calculated at your final pay rate (basic pay + locality pay) and taxed as ordinary income.¹ This is the most commonly underestimated retirement asset for federal employees with long tenure.

Carryover cap: Most career employees may carry over a maximum of 240 hours of annual leave into a new leave year (5 U.S.C. § 6304). SES members can carry 720 hours; overseas employees 360 hours.
Use-or-lose deadline: The 2026 federal leave year ends January 9, 2027. Leave exceeding the carryover cap is forfeited at year-end. To avoid losing excess leave, it must be used (not just scheduled) before the year-end cutoff.
Dollar example: If you earn $140,000/year and retire with 240 hours of annual leave, that's roughly $16,100 tax-before (240 ÷ 2,087 hours × $140,000). At $180,000 it's ~$20,700. Worth timing your retirement to maximize this balance, not minimize it.
Implication: If your annual leave balance will hit 240 hours before the leave year ends, retiring before year-end preserves that balance. Retiring in February after the new leave year resets your balance to near zero costs you the prior year's accumulation.

2. Annuity start date: end of month vs. mid-month

Your FERS annuity starts on the first day of the month following your retirement date — regardless of whether you retire on the 1st, the 15th, or the last day of the month.²

Special rule: If you retire on the 1st, 2nd, or 3rd of a month, your annuity starts the day after retirement.
Implication: Retiring on January 31 vs. January 15 gives you an identical annuity start date (February 1) — but you receive 16 more days of employment pay on the January 31 exit. Always retire at or near the end of the month.
Last day of pay period vs. last calendar day: For leave accrual purposes, you want to retire after the last full biweekly pay period (to receive that period's leave accrual). The last day of a pay period is usually a Saturday — retiring that Monday or at end of that pay period maximizes leave earned.

3. High-3 salary timing: the permanent multiplier

Your basic FERS annuity is 1% × high-3 average salary × years of service (1.1% if you retire at 62+ with 20+ years). The high-3 is the average of your three highest consecutive years of basic pay (including locality).³

What counts: basic pay + locality pay. What does NOT count: overtime, Sunday premium, night differential, performance awards, bonuses.
Step increases and high-3: Each General Schedule step increase modestly raises your base. Retiring before a step increase that would have raised your high-3 costs you that increment permanently. For a GS-14 step increase worth $3,000/year, spread over a 3-year high-3 average, that's $1,000/year added to annuity base — and 1% of that = $10/year more annuity, forever.
Promotion timing: If you receive a promotion 18 months before retirement, only 18 months of the new higher salary flows into the high-3. Waiting until you have 36 months at the promoted grade maximizes the high-3 impact. For a promotion worth $20,000/year in salary, timing it right can add $3,000–$5,000/year to your lifetime annuity.
Locality pay changes: Locality pay is included in basic pay for high-3 purposes. A late-career reassignment to a higher-locality area (e.g., San Francisco vs. Rest of U.S.) raises your high-3 — but only if you stay 3 years at the new rate.

4. FERS supplement timing: hit MRA before retirement

The FERS Special Retirement Supplement (SRS) bridges the gap between early retirement and age 62, when Social Security begins. It is only available to employees who retire with an immediate, unreduced annuity before age 62:³

MRA (age 55–57 depending on birth year) + 30 years of service — supplement begins at retirement
Age 60 + 20 years of service — supplement begins at retirement
VERA/VSIP early retirement — supplement deferred until you reach your MRA (see VERA/VSIP guide)

What does not qualify: MRA+10 (reduced-annuity) retirement — no supplement at all. If you retire at MRA with 10–29 years, you lose the supplement entirely.

For a GS-14 with 28 years of service, the FERS supplement could be worth $1,200–$1,800/month from age 57 to 62 — that's $72,000–$108,000 over 5 years. The difference between qualifying and not is simply whether you hit 30 years of service by your MRA.

5. Sick leave conversion: timing for clean months

Unused sick leave is converted to additional service credit at retirement: 174 hours = 1 month of additional service (2,087 hours = 1 full year).⁴ Partial months are dropped — only complete months count.

Don't retire with 150 hours of sick leave. 174 hours = 1 month (worth 1% × high-3 more annuity, forever). If you have 150 hours and could accrue 4 more biweekly (you earn 4 hours/pay period for most career employees), waiting one pay period adds a full month of service credit.
Example: If your high-3 is $130,000 and you're retiring with 29 years, converting an extra month via sick leave effectively makes it 29 years and 1 month. That adds $130,000 × 1% × (1/12) ≈ $108/year to your annuity, every year, for life. Small but real.
See the dedicated tool: Sick Leave Retirement Credit Calculator — enter your current balance and projected retirement date to find your nearest clean-month threshold.

Six variables, one decision — model yours before you pick a date.
Annual leave balance, sick leave hours, step-increase timing, high-3 projection, FERS supplement eligibility, and TSP Rule of 55 all interact. A federal-benefits specialist can run your exact numbers and find your optimal window. Free match, no commitment.

Get your date modeled →

6. FEHB: the five-year rule you cannot undo

To carry Federal Employees Health Benefits into retirement, you must have been continuously enrolled in FEHB for the five years immediately preceding your retirement date — or since your first eligibility if shorter.⁵

This rule is binary and strict. A resignation and rehire that breaks the 5-year continuous window can permanently disqualify you from FEHB in retirement.
If you are considering phased retirement, a bridge job, or VERA early-out: verify your FEHB enrollment continuity before separating. A brief gap can cost you premium-free coverage worth hundreds of thousands of dollars over a 25-year retirement.
Time on TRICARE can count toward the 5-year period under certain conditions, but only if you were also enrolled in FEHB at retirement.
See also: FEHB 5-Year Rule Guide — eligibility verification, MRA+10 postponement trap, and OPM waiver authority.

7. TSP Rule of 55: withdrawals before age 59½

The standard 10% IRS early withdrawal penalty applies to TSP distributions before age 59½ — unless you qualify for the Rule of 55: if you separate from federal service during or after the calendar year in which you turn 55, you may withdraw from TSP without the 10% penalty.⁶

Year-of-separation rule: You don't need to be 55 on your separation date — just in that calendar year. Retiring in January of the year you turn 55 in December qualifies.
Public safety officers (law enforcement, firefighters, air traffic controllers, customs and border protection officers) have a more favorable rule: penalty-free withdrawals if you separate during or after the year you turn 50.
Roth TSP note: Roth TSP contributions can always be withdrawn penalty- and tax-free. Roth TSP earnings are penalty-free after age 59½ (or 55 with separation rule). SECURE 2.0 § 325 eliminated Roth TSP lifetime RMDs starting 2024, so Roth TSP held in TSP has the same no-RMD treatment as Roth IRA.
If you retire before the year you turn 55 and need TSP income before 59½, a 72(t) SEPP plan is one option — but this requires careful planning and locks you in for 5 years or until 59½.

A practical retirement timing checklist

For a FERS employee planning to retire in the next 12–24 months:

12 months out:

Confirm your MRA and whether you'll have 30 years to qualify for supplement at MRA (or 20 years for age-60 retirement with supplement).
Check your FEHB enrollment date — confirm 5-year continuous coverage will be intact on your target date.
Run your high-3 projection: do you have a step increase, promotion, or locality change that would benefit from an extra 6–12 months? The permanent annuity impact may exceed the cost of working longer.
Project your TSP balance and model whether age-55 rule applies on your target date. If you're retiring at 54, the penalty implications are material.

3 months out:

Review your annual leave balance. Will you exceed 240 hours before your target date? If so, plan to either use leave or adjust the date to capture the maximum lump sum.
Check your sick leave balance. Are you within one pay period of a clean month conversion (multiples of 174 hours)? Consider adjusting your date by a few weeks.
Confirm your target retirement date is at or near the last day of a pay period and month — to get earliest possible annuity start and final period's leave accrual.

At retirement:

Survivor annuity election: model the true cost before OPM paperwork is submitted. There is no mulligan — this election is typically locked at retirement.
File for FERS supplement if eligible — it does not start automatically; it requires a separate OPM form.
Begin the OPM application process 60–90 days before your retirement date: OPM Retirement Application Guide.

Frequently asked questions

What is the best month to retire from the federal government?

There's no single "best month" — it depends on four variables unique to you:

Leave year deadline: The 2026 leave year ends January 9, 2027. Retiring before that date preserves your full annual leave balance (up to 240 hours). Retiring in February after the leave year starts resets your carryover.
Step increase or promotion timing: If you have a within-grade increase in March that will raise your base salary, retiring in February costs you that increment in your high-3 permanently. A few months difference can mean $200–$500/year more (or less) annuity, forever.
Sick leave clean month: Check whether you're within a biweekly pay period of a 174-hour multiple. Adjusting by a pay period adds a full month of service credit.
FERS supplement eligibility: If you're 2 months short of 30 years at your MRA, waiting 2 months enables the supplement worth potentially $100K+ over 5 years.

Does retiring at the end of the month really make a difference?

Yes, materially. Your FERS annuity starts on the first day of the month following retirement regardless of when in the month you retire (exception: retiring on the 1st, 2nd, or 3rd starts your annuity the next day). So retiring January 15 vs. January 31 gives you the same February 1 annuity start — but the January 31 exit provides 16 extra days of employment salary. For a GS-14 earning $160,000/year, that's roughly $6,800 extra in employment pay for simply picking the end of the month.

How do I time my retirement to qualify for the FERS supplement?

The FERS Supplement requires an immediate, unreduced annuity. The qualifying paths are:

MRA (55–57, by birth year) + 30 years of service
Age 60 + 20 years of service
Age 62 with 5+ years (supplement not applicable — SS becomes available)

MRA+10 (retiring with only 10–29 years at MRA) explicitly excludes the supplement — there is no exception. If you're 28 years in and 6 months from 30, the $72,000–$108,000 supplement over a 5-year bridge makes working those 6 months financially decisive. Use the FERS Supplement Calculator to model the exact dollar impact.

How does sick leave affect my FERS retirement date?

OPM converts unused sick leave to additional service credit using this formula: 174 hours = 1 additional month. Partial months are dropped — only complete months count toward your annuity. If you have 150 hours of sick leave at retirement, those 150 hours yield zero additional credit. But if you wait one more biweekly pay period (earning 4 more hours), you cross 154 hours — still zero. You'd need 174 hours for the first full month.

The practical approach: use the Sick Leave Calculator to enter your current balance and find the exact balance needed for each additional month of credit. Then model whether adjusting your retirement date by a few weeks is worth the additional pension.

Can I withdraw from TSP penalty-free if I retire before 59½?

Yes — if you separate from federal service during or after the calendar year you turn 55. The Rule of 55 (IRC § 72(t)(2)(A)(v)) means you don't have to be 55 on your last day, just 55 somewhere in that year. Retiring in January of the year you turn 55 in November qualifies.

Special categories (law enforcement, firefighters, air traffic controllers) qualify at age 50. If you leave before the year you turn 55 and need TSP income before 59½, the only option is a 72(t) SEPP plan — which requires uniform distributions for at least 5 years or until 59½, whichever is later, and cannot be modified without a 10% penalty on all prior distributions.

How much does a step increase or promotion timing affect my pension?

More than most employees expect, because the high-3 effect is permanent and cumulative over a lifetime of retirement payments.

Step increase example: A GS-14 Step 6→7 increase worth ~$3,100/year, if captured fully in the high-3 (36 months at the new rate), adds $1,033/year to your annuity base. At 1.0% multiplier, that's ~$10.33/year more pension — small, but for every year of retirement.

Promotion example: A GS-13→14 promotion worth $15,000/year in salary. At 36 months, the entire amount flows into the high-3. At 18 months, only half flows in. The difference in annuity: $15,000 × 50% (half vs. full) × 1% multiplier = $75/year for every year of retirement — and the high-3 impact ($7,500 more high-3) translates directly to $75/year annuity difference. If you retire at 57 and live to 85, that's 28 years × $75 = $2,100 in total annuity. Modest, but real. Use the FERS High-3 Guide and High-3 Calculator to model your specific scenario.

Why this requires a specialist

Each decision in isolation is manageable. The complexity is in the interactions: retiring in October vs. December changes both your annual leave balance and your high-3 if you have a step increase scheduled. Timing a promotion 30 months before retirement vs. 20 months changes the math. The sick leave and leave year interplay depends on your exact accrual rate and hours. A federal-benefits specialist runs your actual numbers across all six variables simultaneously — and has seen the edge cases.

Related guides and tools

FERS Retirement Calculator — model your annuity, supplement, and TSP income
FERS High-3 Salary Calculator — scenario table by retirement date
Sick Leave Retirement Credit Calculator
Federal Employee Annual Leave Payout Calculator
FERS Supplement Calculator
Survivor Annuity vs. Life Insurance Calculator
FERS Retirement Eligibility Calculator
FERS Supplement Guide — formula, earnings test, MRA table
Sick Leave & Annual Leave at Retirement
FEHB + Medicare in Retirement
FEHB 5-Year Rule
VERA/VSIP Early Retirement Guide
OPM Retirement Application Walkthrough
Federal Retirement Checklist

Get your retirement date modeled

A federal-benefits specialist can run your exact numbers — annual leave balance, sick leave hours, high-3 projection, supplement eligibility, FEHB window, TSP Rule of 55 — and tell you the optimal date. Free match.

Sources

OPM — Lump-Sum Payments for Annual Leave. Payment calculated at final pay rate; taxed as ordinary income.
OPM FAQ — When Do My Benefits Begin? Annuity starts first of month following retirement; special rule for 1st–3rd of month retirements.
OPM — FERS Basic Annuity Formula, High-3, and Supplement Eligibility.
OPM — FERS Voluntary Retirement, Sick Leave Credit. 174 hours = 1 month additional service; partial months dropped.
OPM — FEHB in Retirement: 5-Year Enrollment Requirement.
TSP — Information for Participants Leaving Federal Employment (Rule of 55; age 50 for public safety officers).

Values and rules verified as of April 2026. Annual leave carryover cap and leave year dates per 5 U.S.C. § 6304 and OPM leave year calendar.