FERS Retirement Calculator
Estimate your Federal Employees Retirement System (FERS) pension using official formulas. Model different retirement scenarios, survivor benefits, and service credits.
How the FERS Calculator Works
This calculator uses the official FERS pension formula: High-3 × Years of Service × Multiplier. Enter your highest three-year average salary, total creditable service (including military buyback and sick leave credit), and select your retirement scenario. The calculator automatically determines your eligibility for immediate, MRA+10, postponed, or deferred retirement, and calculates any early retirement penalties.
If eligible, the calculator also estimates your FERS Supplement, the temporary benefit paid from retirement until age 62 that approximates your Social Security benefit.
FERS Pension Examples: 20-Year vs 30-Year Employee
See how the FERS formula works with real numbers. These examples show what federal employees at different career stages can expect from their pension.
Case Study: 20-Year Employee
Profile: GS-13 Step 10, Washington DC locality
High-3 Salary: $128,000
Years of Service: 20 years
Retirement Age: 60
Multiplier: 1.0% (under 62 or less than 20 years at 62)
$128,000 × 20 × 1.0% = $25,600/year
That's $2,133/month before taxes
Key Details:
- Eligible for immediate retirement at 60+20
- No FERS Supplement (not MRA+30)
- No early retirement penalty
- Full survivor benefit would reduce to $23,040/year
Case Study: 30-Year Employee
Profile: GS-14 Step 10, Washington DC locality
High-3 Salary: $155,000
Years of Service: 30 years
Retirement Age: 57 (MRA)
Multiplier: 1.0% (under age 62)
$155,000 × 30 × 1.0% = $46,500/year
That's $3,875/month before taxes
Key Details:
- Eligible for MRA+30 immediate retirement
- Receives FERS Supplement until age 62
- No early retirement penalty
- Full survivor benefit would reduce to $41,850/year
What If? The 1.1% Multiplier Difference
If the 30-year employee waited until age 62 to retire (instead of 57), they would qualify for the 1.1% multiplier:
Retire at 57 (MRA+30):
$155,000 × 30 × 1.0% = $46,500/year
Retire at 62 with 35 years:
$160,000 × 35 × 1.1% = $61,600/year
Difference: $15,100/year more, plus 5 more years of salary. But also 5 fewer years of retirement. Use the calculator above to model your specific scenario.
FERS Retirement Calculator (Draft)
Start with the essentials, then expand advanced options to model MRA+10, deferred cases, survivor elections, and service credits.
Quick estimate inputs
Optional. Needed to calculate FERS supplement if you retire before 62. Check SSA.gov for your estimate.
Advanced options
You can expand advanced options to model MRA+10 postponement, sick leave, survivor elections, or military service.
The calculator uses official FERS formulas but is for planning only. Request an official estimate from your agency before retiring.
Your retirement snapshot
Review eligibility, service credit, and projected income. Adjust inputs to explore alternative timelines.
Enter your information and select “Calculate estimate” to view projected pension details.
Plan Your TSP Too
Your FERS pension is just one leg of retirement. Project your TSP growth, model withdrawal strategies, and see how your full retirement picture comes together.
Review Your Current GS Salary
Your FERS pension is based on your high-3 salary. Look up your exact 2026 GS pay with locality to make sure your retirement estimate is accurate.
Related Tools
GS Pay Calculator
Look up your 2026 salary with locality pay for all grades and steps.
TSP Calculator
Project TSP growth and plan withdrawal strategy alongside your pension.
High-3 Calculator
Find your highest 36 months of pay for the pension formula.
Severance Calculator
Estimate severance pay if facing a RIF or involuntary separation.
Postponed vs. Deferred Retirement: What's the Difference?
These two retirement types are often confused, but the distinction is critical for planning your pension:
Postponed Retirement
Who qualifies: MRA+10 retirees who want to avoid the early retirement penalty.
How it works: You separate from federal service at MRA with 10+ years, but you "postpone" receiving your pension until age 62. This eliminates the 5% per year penalty.
Health insurance: You can keep FEHB coverage by paying premiums out of pocket, then have them deducted from your pension when payments begin.
✓ Preserves full pension value
Deferred Retirement
Who qualifies: Anyone who leaves federal service with 5+ years before meeting any retirement eligibility.
How it works: You separate before reaching MRA (or without enough service for immediate retirement). Your pension is "deferred" until age 62.
Health insurance: You cannot keep FEHB during the deferral period. Coverage ends when you separate.
✓ No penalty at 62
Key Difference: Postponed retirees can maintain FEHB coverage. Deferred retirees cannot. If health insurance is important, try to reach MRA before leaving federal service.
FERS Supplement: Your Bridge to Social Security
The Special Retirement Supplement (SRS) is a temporary monthly payment that approximates your Social Security benefit until you reach age 62. Here's everything you need to know:
FERS Supplement Formula
Supplement = (Estimated SS Benefit at 62) × (FERS Years ÷ 40)
Example: If your estimated Social Security at 62 is $2,000/month and you have 30 years of FERS service: $2,000 × (30 ÷ 40) = $1,500/month until age 62.
✓ Eligible for FERS Supplement
- • MRA + 30 years of service (immediate retirement)
- • VERA (Voluntary Early Retirement Authority)
- • Special provisions: LEO, firefighters, air traffic controllers
- • Discontinued service (involuntary separation)
✗ Not Eligible
- • MRA + 10 retirees (even if taking full penalty)
- • Age 60 + 20 years retirees
- • Deferred retirement
- • Postponed retirement
Earnings Limit Warning: The FERS Supplement is reduced if you earn more than the Social Security earnings limit ($24,480 in 2026). For every $2 you earn above the limit, your supplement is reduced by $1.
Immediate Retirement Eligibility
MRA + 30: Full pension + FERS Supplement. Best option if eligible.
Age 60 + 20: Full pension, no supplement. Good if close to 60.
Age 62 + 5: Full pension, 1.1% multiplier if 20+ years. No supplement.
MRA+10 Penalty Calculation
Retiring at MRA with 10-29 years means a 5% penalty per year under age 62.
Example: MRA at 57, retiring immediately = 5 years under 62 = 25% permanent reduction. Consider postponing to 62 to eliminate the penalty.
Common FERS Calculation Mistakes to Avoid
Federal employees often make these errors when estimating their pension. Avoid these pitfalls:
❌ Using Gross Pay for High-3
Your High-3 is based on basic pay only—not overtime, bonuses, awards, night differential, or Sunday premium. Many employees overestimate their pension by including these amounts.
❌ Forgetting the Early Retirement Penalty
MRA+10 retirees face a permanent 5% reduction per year under age 62. Retiring at 57 instead of 62 means a 25% lifetime reduction—not just until you turn 62.
❌ Ignoring Survivor Benefit Costs
Electing the full survivor benefit (50% to spouse) costs 10% of your gross annuity. A $50,000 pension becomes $45,000 net. Plan for this reduction in your retirement budget.
❌ Counting Sick Leave for Eligibility
Sick leave adds to your pension amount but not your service time for eligibility. You can't use sick leave to meet the 30-year, 20-year, or 5-year service requirements.
⚠️ Not Understanding the Multiplier
You get the 1.1% multiplier only if you retire at age 62+ with 20+ years. Otherwise, it's 1.0%. This makes a meaningful difference: 30 years at $100,000 High-3 = $33,000/year (1.1%) vs $30,000/year (1.0%).
What Counts as Creditable Service?
Your total creditable service determines both your pension amount and retirement eligibility. Here's what counts:
✓ Counts Toward Service
- • All federal civilian employment
- • Military service (with buyback deposit)
- • Unused sick leave (pension amount only)
- • Part-time service (prorated)
- • Temporary/term appointments
- • Peace Corps/VISTA service
- • Transferred CSRS service
✗ Does NOT Count
- • Military service without buyback
- • Contractor/private sector time
- • Leave without pay (LWOP) over 6 months/year
- • State/local government service
- • NAF employment (without conversion)
- • Periods with refunded retirement contributions
Military Buyback: Pay 3% of your military basic pay (plus interest if separated more than 3 years ago) to get credit. This is almost always worth it—the return on investment is excellent. Contact your HR office to start the deposit process.
Retirement Eligibility Timeline
Enter your birth year and federal hire date to see when each retirement pathway unlocks.
Retirement Date Optimizer
See your eligibility timeline and find your optimal retirement date. Enter your birth date and service computation date to get started.
Usually on your SF-50
Sick Leave Conversion Calculator
See how much your unused sick leave adds to your FERS pension. Unlike other calculators, this shows the actual dollar value, not just months of credit.
Check your LES or HR system
Avg of highest 36 months
1.1% if retiring 62+ with 20+ yrs
Learn more about how sick leave adds to your pension or see the full sick leave rules in our FERS Guide.
What's Your MRA?
Enter your birth year to instantly see your Minimum Retirement Age (MRA).
Complete FERS Retirement Guide
Understand eligibility requirements, MRA charts, the 1% vs 1.1% multiplier, survivor benefits, FERS Supplement rules, and postponed vs. deferred retirement options.
Read the Complete FERS Retirement Guide →