FIRE for Government Workers: The FERS + TSP + FEHB Playbook
Government employees have three structural FIRE advantages most professions don't. FERS pension provides inflation-adjusted lifetime income equivalent to $500K-$1.5M of portfolio. TSP has fees ~0.05% — lower than Vanguard. FEHB-into-retirement eliminates the $1,500/mo pre-Medicare healthcare problem most FIRE pursuers face. This guide unpacks the math for federal employees and the variations for state/local workers.
The three-leg FERS structure
Federal Employees Retirement System (FERS) covers most federal civilian employees hired after 1986. It's a three-leg stool designed to replace 60-80% of pre-retirement income through three coordinated income streams:
Leg 1: FERS Basic Annuity (pension)
Formula: 1% × years of service × high-3 average salary (1.1% if retiring at age 62+ with 20+ years). For a 25-year employee with high-3 of $120K, that's $30K/yr lifetime income, inflation-adjusted starting at 62 (partial COLA before then). Equivalent portfolio value at 4% rate: $750K. The pension is the most underestimated piece of federal compensation — most federal employees don't account for it when evaluating private-sector job offers.
Leg 2: TSP (Thrift Savings Plan)
401(k)-equivalent with 5% government match on first 5% of contributions. 2025 limit: $23,500 employee + 5% match. Fees: 0.05-0.07% across all funds — among the lowest in the world. Available funds: G (Treasury), F (fixed income), C (S&P 500), S (extended market), I (international), Lifecycle funds. Both Traditional and Roth options.
Leg 3: Social Security
FERS employees pay full FICA and qualify for full SS benefits. No WEP/GPO reductions for FERS. For a high-income federal employee retiring at 62 with 35 years of FICA-covered work, SS provides $25K-$35K/yr — equivalent to $625K-$875K of portfolio.
Combined: a 30-year FERS employee retiring at high-3 of $130K can typically replace 70-90% of pre-retirement income through pension + TSP withdrawals + SS, without depleting principal. The required private-sector-equivalent portfolio: $0 in additional outside savings. The FERS structure provides what most private-sector workers need $1.5M-$2.5M to replicate.
The 5 federal employee FIRE levers
1. Maintain FEHB enrollment in your final 5 years
The most valuable single federal employee retirement benefit, and one of the most lost. Rule: you must be enrolled in FEHB for the 5 years immediately preceding retirement to continue FEHB into retirement at the same employee cost share. Lose this 5-year continuous enrollment (e.g., switching to spouse's plan to save monthly premium) and you forfeit retirement FEHB access permanently.
The dollar value: 2025 federal family premium averages $2,500/mo with employer paying 72% = $1,800/mo of employer-paid premium that continues into retirement. Over a 25-year retirement, that's $540,000 of present-value benefit. The single greatest mistake federal employees make in financial planning is not understanding this 5-year rule.
2. Max TSP + claim the full 5% match
The match is free money — contribute at least 5% of salary to get the full 5% match (0% on first 0%, 1% on next 3%, then 0.5% on next 2%, in a tiered structure). At higher savings rates, max the employee contribution ($23,500 in 2025). For a GS-13 step 10 ($150K) maxing TSP at $23,500 + $7,500 match (5%), total annual contribution is $31,000.
Allocation matters: defaulting to the G Fund (Treasury) for long-term accumulation is a common federal employee mistake. G Fund returns are competitive with Treasury yields, which barely beat inflation. Most FIRE-oriented federal employees should hold 70-90% in C/S/I equity funds during accumulation, shifting to L Fund or higher G/F allocation only within 5 years of retirement.
3. Plan MRA + 30 vs MRA + 10 carefully
MRA + 30 (retire at minimum retirement age with 30 years of service) provides full unreduced pension. MRA + 10 (retire at MRA with 10+ years of service) provides a reduced pension — specifically a 5% reduction per year under 62. For a GS-13 retiring at MRA 57 with 30 years of service vs MRA + 10 at 57 with 20 years of service, the pension delta is 50% larger basic accrual PLUS no 25% age-reduction = roughly 2× the lifetime annual pension benefit.
The decision: are 5-7 more years of federal service worth doubling your pension? For most FIRE-oriented federal employees, the answer is yes if they're in tolerable roles. Many take a "FIRE-then-keep-going" approach — accumulate to financial independence by MRA, then continue working past MRA + 30 for pension maximization, then retire at maximum benefit. The pension acts as a kicker on top of already-sufficient TSP.
4. Pursue PSLF if applicable
Federal employment qualifies for Public Service Loan Forgiveness on federal Direct Loans after 120 qualifying payments. For a federal employee entering with $80K of federal student debt and 10+ years of federal service, PSLF typically forgives $30K-$60K tax-free. Requirements: IDR plan, Direct Loans only (consolidate FFEL), annual Employment Certification Form. See PSLF Calculator for modeling.
Critical: PSLF clock starts at the first qualifying payment, not your federal hire date. Submit annual ECF (Employment Certification Form) to track. Don't refinance federal loans to private — destroys PSLF eligibility permanently.
5. Plan the FERS Annuity Supplement transition
The supplement bridges from your retirement date to age 62 by approximating the Social Security benefit you would have earned in those years. For a 30-year federal employee retiring at MRA 57, that's typically $1,500-$2,000/mo from age 57 to 62.
The trap: supplement ENDS at age 62. Don't plan retirement income assuming it continues. The transition from supplement + pension to SS + pension at age 62 should be modeled explicitly. For most federal early retirees, claiming SS at 62 makes mathematical sense given the supplement structure — but specialists in federal retirement (like Tammy Flanagan's work) often recommend delaying SS to 67-70 for the larger lifetime benefit, using TSP withdrawals to bridge.
Run YOUR government-employee-specific path
Open the FIRE Path Comparator, click the "🏛 Government" persona, and adjust to your specific grade/step. Important: the comparator doesn't directly subtract pension income from required portfolio. The mental adjustment: take expected FERS pension + SS combined annual income, subtract from your annual spending, multiply by 25 for the portfolio gap. For a federal employee with $50K expected combined pension + SS and $65K spending, the portfolio gap is ($65K − $50K) × 25 = $375K, not the $1.625M the comparator shows for regular FIRE.
Open the FIRE Path Comparator →Government-employee FIRE traps
1. Losing the FEHB 5-year continuous enrollment
The most expensive federal employee mistake. Dropping FEHB even temporarily (to save monthly premium, to switch to spouse's plan) in the 5 years before retirement permanently forfeits retirement FEHB access. Value lost: $1,800/mo of employer-paid premium for 25+ years = $500K+ of present value. Defense: never drop FEHB unless you're certain you won't need retirement-FEHB access.
2. Defaulting to G Fund for accumulation
The G Fund is a Treasury fund that preserves capital but barely beats inflation. Many federal employees default to G because it's "safe" — but for accumulation phase, this caps long-term returns at 1-2% real. Over 25 years at $20K/yr contributions, the difference between 100% G Fund (~$650K final balance) and 80% C Fund / 20% F Fund (~$1.4M) is enormous. The L Funds rebalance more aggressively into G as you age, which is appropriate for traditional retirement timing but conservative for FIRE pursuers.
3. MRA + 10 reduced pension miscalculation
Federal employees considering MRA + 10 early retirement frequently underestimate the 5%-per-year-under-62 pension reduction. Retiring at MRA 57 with 15 years of service = base pension of 15% of high-3, then reduced 25% (5 years × 5%) = effective 11.25% of high-3. For a $100K high-3, that's $11,250/yr — about half what most federal employees expect. Model the specific math before committing.
4. Refinancing federal student loans
Private refinancing offers attractive rates (2-3% below federal rates in some markets), tempting young federal employees to refinance. Doing so permanently destroys PSLF eligibility AND forfeits IDR plan access AND loses federal forbearance/deferment protections. For a federal employee with $80K of federal Direct Loans and 8+ years of federal employment ahead, the lost PSLF value ($30K-$60K) far exceeds the lifetime refinance savings.
5. Survivor benefit elections made under pressure
At retirement, federal employees elect a survivor annuity (50%, 25%, or 0%) that reduces their pension to provide spousal benefits if they die first. The election is locked in at retirement — you cannot change it later. The choice involves trade-offs: 50% survivor annuity costs ~10% of your pension; 25% costs ~5%; 0% costs 0% but leaves the surviving spouse with only TSP + SS. Many federal employees rush this decision in the retirement paperwork blitz. Plan the analysis in advance — typically 6-12 months before retirement — to ensure the choice aligns with spouse's separate retirement assets and life expectancy.
Frequently asked questions
What to actually do this month, this year, this decade
- Confirm you're enrolled in FEHB if you're within 5 years of any plausible retirement date. Don't drop it under any circumstances.
- Verify your TSP allocation. If you're under 50 and defaulting to G Fund or L 2050+ Fund, switch to 70-90% C/S/I equity allocation.
- Run the FIRE Path Comparator with the Government persona. Add expected FERS pension to your mental "other income" calculation.
- If you have federal student loans and haven't enrolled in PSLF process: file Employment Certification Form, switch to IDR plan, verify Direct Loan status.
- Increase TSP contribution toward the $23,500 max, prioritizing Roth-TSP for early-career employees in low brackets.
- If you're a state/local employee, verify your 457(b) availability and contribute. No early withdrawal penalty after separation is a huge feature.
- Run MRA + 30 vs MRA + 10 vs deferred retirement scenarios with your specific service computation. The retirement-age decision is worth $20K-$50K/yr of lifetime income.
- Plan the FERS Annuity Supplement transition. The age-62 cliff requires explicit modeling.
- Plan survivor benefit elections 12+ months before retirement. The choice is locked in and is worth $200K-$500K of present-value to your spouse depending on selection.