FERS Pension Estimate Calculator
Use this calculator to estimate your annual and monthly FERS basic annuity based on your high-3 salary, creditable service, retirement age, sick leave, and survivor election.
How this retirement FERS calculator works
This retirement FERS calculator estimates your basic annuity under the Federal Employees Retirement System (FERS). It is designed for planning and education, not as an official Office of Personnel Management (OPM) determination.
The estimate starts with your projected high-3 average salary, applies the standard FERS multiplier, and then multiplies by your total service time. It also lets you include unused sick leave and optional survivor benefit reductions.
Core annuity formula used
Annual Pension = High-3 Salary × Multiplier × Total Creditable Service
- Multiplier = 1.0% for most FERS retirements
- Multiplier = 1.1% if you retire at age 62 or later with at least 20 years of service
- Unused sick leave is converted into additional service credit for the annuity calculation
Input guide: what each field means
Estimated High-3 Average Salary
Your high-3 is generally the highest average basic pay over any consecutive 36-month period. In most cases, this is near the end of your career, but not always.
Creditable service
Enter the number of years of service you expect to have at retirement. This usually includes civilian federal service and can include military time if you made a deposit.
Retirement age
Age matters because the 1.1% multiplier applies only when you retire at age 62+ with at least 20 years of service.
Unused sick leave
Sick leave generally does not help you meet retirement eligibility, but it can increase your annuity amount by adding creditable service for calculation purposes.
FERS eligibility basics (quick reference)
- Minimum Retirement Age (MRA) with 30 years
- Age 60 with 20 years
- Age 62 with 5 years
- Early retirement and special provisions may apply in specific agency situations
Example scenario
Suppose your high-3 is $120,000, retirement age is 62, and you have 25 years of service. Because you meet the age-62-and-20-years rule, your multiplier is 1.1%. If you also have 1,043 sick leave hours (about 0.5 years), your total service becomes roughly 25.5 years.
Your estimated gross annual pension would be: $120,000 × 0.011 × 25.5 = $33,660 per year (before any survivor election or deductions).
What this calculator does not include
- Official OPM service computation dates and adjudication rules
- Law enforcement, firefighter, air traffic controller special formulas
- Disability retirement formulas
- Court orders and former spouse benefits
- Tax treatment, Medicare premiums, and long-term care costs
Ways to increase your FERS retirement income
1) Improve your high-3
Promotions and step increases near retirement can meaningfully raise your annuity since the formula is directly tied to your high-3.
2) Add service years
Every additional year of creditable service increases your pension. Even partial years and sick leave conversion can add up.
3) Coordinate FERS with TSP and Social Security
A stronger retirement plan blends your basic annuity, Thrift Savings Plan strategy, and Social Security claiming timing.
Final thoughts
A retirement FERS calculator is a practical first step for federal employees who want clarity around retirement income. Use this estimate to compare scenarios, then verify your official numbers through your agency benefits office and OPM resources.