finance calculator
FERS Retirement with SRS Calculator
Estimate a federal FERS pension, Special Retirement Supplement (SRS), Social Security, and a TSP withdrawal to see total retirement income.
Results
- FERS pension (annual)
- $27,000
- SRS (annual)
- $9,600
- Social Security (annual)
- $21,600
- TSP withdrawal (annual)
- $10,000
- Total annual retirement income
- $68,200
How to use this calculator
- Enter high-3 salary, years of service, and unused sick leave months.
- Toggle SRS eligibility and enter SRS monthly amount if applicable.
- Enter Social Security monthly estimate and TSP balance with a withdrawal rate.
- We calculate each component and total annual retirement income.
Inputs explained
- High-3
- Average of your highest-paid 36 consecutive months.
- Years of service
- Creditable FERS service time. Sick leave months convert to years in the pension.
- SRS eligibility
- SRS applies for certain retirements before age 62; include only if you qualify.
- SS monthly
- Estimated Social Security benefit. Use SSA estimates for accuracy.
- TSP withdrawal rate
- Annual % withdrawal assumption from your TSP balance.
How it works
FERS pension = high-3 × 1% per year of service (simplified: 1.2% if ≥20 years; adjust via high-3 if needed) plus sick leave converted to years.
SRS is included only if marked eligible; enters as a monthly amount.
Social Security and SRS inputs are simple monthly estimates multiplied to annual.
TSP withdrawal = balance × chosen withdrawal rate.
Total annual income = pension + SRS + Social Security + TSP withdrawal.
When to use it
- Planning retirement income for federal employees with FERS pensions and potential SRS.
- Comparing total income with and without SRS eligibility.
- Testing TSP withdrawal rates alongside pension/SS for budgeting.
Tips & cautions
- Update high-3 and years of service for accurate pension estimates; 1.0% vs 1.1/1.2% multipliers vary by age/service—this is simplified.
- Use a conservative TSP withdrawal rate if you want longevity; 4% is a common starting point.
- SRS ends at 62 when Social Security eligibility begins; adjust inputs to model that transition.
- Simplified FERS multiplier; does not model age-based multipliers, COLAs, survivor benefits, or FEHB costs.
- SRS is user-entered; does not compute eligibility or offsets.
- Does not model taxes or inflation.
Deep dive
Estimate FERS pension plus Special Retirement Supplement, Social Security, and TSP withdrawal to see total retirement income.
Enter high-3, years of service, sick leave, SRS eligibility, SS estimate, and TSP balance to budget retirement cash flow.
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