Overview
The RetireCiv Retirement Calculator is built on the official formulas published by the Office of Personnel Management (OPM), the Social Security Administration (SSA), and the Federal Retirement Thrift Investment Board (FRTIB). It covers every major component of a federal retirement package and integrates them into a single, unified projection.
The calculator covers FERS in full, including the paths that carry CSRS service into it:
- FERS: Federal Employees Retirement System: the three-part retirement plan covering nearly all federal employees first hired after December 31, 1983. The system itself took effect January 1, 1987 (OPM RI 90-1).
- CSRS components: For FERS transferees with 5 or more years under the legacy Civil Service Retirement System, the annuity is computed as a FERS annuity with a CSRS component. CSRS Offset service is credited under FERS rules and does not count toward those five years. A career spent entirely under standalone CSRS is not modeled.
- FERS Special Provisions: Enhanced retirement rules for Law Enforcement Officers (LEO), Firefighters, and Air Traffic Controllers (ATC).
All calculations produce estimates. Your final benefit will be determined by OPM based on your official service and pay records. Always verify with your agency HR office before making retirement decisions.
FERS Pension Annuity
The FERS pension is a defined-benefit annuity paid monthly for life. It is calculated using three variables: your High-3 average salary, your years of creditable service, and a multiplier determined by your age and service length at retirement.
Standard FERS Formula
High-3 Salary × 1.0% × Years of Service = Annual Annuity
Enhanced Formula (Age 62+ with 20+ Years)
High-3 Salary × 1.1% × Years of Service = Annual Annuity
The calculator accounts for all key pension variables:
High-3 Average Salary
The average of your three consecutive highest-paid years of basic pay. The calculator identifies the optimal 3-year window from your salary history.
Creditable Service
Total years and months of federal civilian and qualifying military service. Includes deposits for prior service and military buybacks.
Sick Leave Credit
Unused sick leave is converted to additional service credit at a rate of 174 hours per month. This can meaningfully increase your annuity.
Survivor Benefit Elections
Electing a survivor annuity (25% or 50%) reduces your pension by 5% or 10% respectively. The calculator models all three elections.
MRA+10 Reduction
Retiring at your Minimum Retirement Age (MRA) with 10–29 years of service results in a 5% reduction per year under age 62, unless you defer.
FERS Supplement
A bridge payment approximating your Social Security benefit, paid from retirement until age 62. Reduced by earned income over the SSA annual limit.
Minimum Retirement Age (MRA) ranges from 55 to 57 depending on your year of birth. The calculator determines your MRA automatically from your date of birth and applies the correct eligibility rules.
Source: OPM FERS Information Center lists the official annuity formulas, eligibility rules, and retirement options.
Thrift Savings Plan (TSP)
The TSP is a tax-advantaged retirement savings account, the federal equivalent of a 401(k). RetireCiv models TSP growth, agency matching, and withdrawal projections over your entire career and retirement horizon.
- Current balance and projected growth using compound interest modeling
- Agency automatic contribution (1%) and matching contributions (up to 4%) on the first 5% contributed
- Annual IRS contribution limits with automatic catch-up contributions after age 50
- Traditional (pre-tax) vs. Roth (post-tax) TSP accounts modeled separately
- Fund allocation across G, F, C, S, I, and Lifecycle funds with historical return assumptions
- Required Minimum Distribution (RMD) calculations beginning at age 73 (born 1951–1959) or age 75 (born 1960 and later, per SECURE 2.0)
- Withdrawal scenarios: monthly payments, life annuity, partial withdrawals, and lump sum
Agency Match Summary
Source: TSP.gov covers contribution limits, fund performance, and RMD rules under SECURE 2.0.
Readiness Score
The Readiness Score is a composite 0–100 metric that assesses how well-positioned you are for retirement across five scored components. It is designed to give you an at-a-glance assessment and surface the highest-impact gaps to close.
Income Replacement (30 pts)
Compares your combined retirement income (annuity, supplement, Social Security, TSP and other withdrawals, pensions and other income, for you and your spouse when entered) against your household salary (yours plus your spouse’s while it is still being paid). Full points at 100% replacement, with 80% or more the planning target. The highest-weighted component: income sufficiency is the foundation of retirement security.
Savings Rate (20 pts)
Measures your annual retirement savings, TSP contributions plus investment-account contributions across the household, as a percentage of salary. Full points at a 20% savings rate.
Financial Independence Progress (20 pts)
Compares your investment assets, with home value excluded, against a Financial Independence number of 25 times your annual expenses. Full points when the ratio reaches 100%.
Debt Health (15 pts)
Measures annual debt payments as a share of household salary. Full points at 0%, scaling down to zero points at a 36% debt-to-income ratio. High consumer debt entering retirement reduces financial resilience and the benefit of your fixed pension income.
Emergency Fund (15 pts)
Measures liquid savings in months of expenses, with full points at 6 months. An adequate emergency fund prevents early TSP withdrawals and pension disruption in the first years of retirement.
Score ranges: 0–39 (Needs Work) · 40–59 (Fair) · 60–79 (Good) · 80–100 (Excellent). Scores update in real time as you adjust your inputs.
Action Plan
The Action Plan translates your Readiness Score into a prioritized, actionable checklist. Each recommendation is linked directly to the relevant calculator input so you can model the impact before acting.
- Recommendations are ranked by priority tier first (Critical, then Important, then Optimization), and by estimated score impact within each tier
- Each item is categorized as Critical (red), Important (amber), or Optimization tip (blue)
- Each item names your current state, a concrete target, and the estimated score points at stake
- Your Readiness Score updates as soon as you change the relevant input in the calculator
Special Provisions
Certain federal occupations qualify for enhanced retirement benefits under Special Retirement Coverage (SRC). RetireCiv applies the enhanced formula when you retire under the special-provision authority. A covered officer separating under VERA or DSR is computed at the standard rate instead, and the calculator says so.
Law Enforcement Officers (LEO) & Firefighters
- Mandatory retirement: age 57, or on completing 20 years of covered service if later (5 U.S.C. §8425(b)); an agency head may keep you on to 60 when the public interest requires, and the agency decides
- Enhanced annuity: 1.7% × High-3 × your first 20 years of total FERS service, once you retire under the special-provision authority
- Plus: 1.0% × High-3 × remaining years of service
- Minimum retirement: age 50 with 20 years of covered service, or any age with 25 years of covered service
Air Traffic Controllers (ATC)
- Mandatory retirement: age 56 (5 U.S.C. §8425(a)); the Secretary may retain a controller with exceptional skills and experience to 61, and the agency decides
- Same 1.7% enhanced multiplier as LEO/FF, applied to your first 20 years of total FERS service
- Eligibility: age 50 with 20 years of ATC service, or any age with 25 years
Special Provision Annuity Formula
(High-3 × 1.7% × first 20 years) + (High-3 × 1.0% × remaining years)
Scenario Comparison
The What-If Scenarios tool lets you change one planning decision and see the result across your whole retirement. Every figure recalculates as you move a control, using the same engine as your dashboard.
- Settings you can change: retirement date and authority, TSP savings rate while working, the share of income you plan to spend, the return during retirement, Social Security claiming age, survivor benefit election, spending pattern, and your life expectancy and your spouse's. There is deliberately no withdrawal-rate control: the engine is need-based, drawing exactly the gap between spending and guaranteed income
- Retirement-date choices include your planned date, your earliest VERA date, and the shared milestone ages (your MRA, 60, 62, 65, 67, 70 for standard employees; special-provision employees get their own list of age 50 with 20 years, 25 years at any age, and the mandatory separation age, and the age-60 entry needs 20 years of service), plus any age you type
- A year-by-year chart shows which sources pay for each year, including the FERS supplement window and required minimum distributions from age 73 or 75, per your birth year
- Settings are not saved: they reset when you leave, and your entered plan is never changed. The PDF report always prints your saved plan, not the what-if projection on screen; to keep a what-if result, note its settings and re-create it
Retirement Timeline
The report's Retirement Timeline lists the key dates of your plan in one table, from separation through Required Minimum Distributions, and the wizard's retirement step offers the same milestone ages (MRA, 60, 62, 65, 67, 70 for standard employees; special-provision employees see their own list) as one-click retirement dates.
Retirement Date
The year your FERS annuity begins. A postponed or deferred annuity gets two rows: the separation date and the later commencement age.
SRS Bridge
When the Special Retirement Supplement starts (deferred to your MRA for a pre-MRA VERA or DSR separation) and its end at 62, when the Social Security window opens.
Social Security Start
The year benefits begin at your chosen claiming age, with the projected amount.
Required Minimum Distributions
The age SECURE 2.0 sets from your birth year (73 or 75) when TSP withdrawals become mandatory.
Portfolio Depletion
If your withdrawal rate depletes the portfolio inside the plan, the projected year and age it happens.
Contact
Have a question about a specific calculation, found a discrepancy with your OPM estimate, or want to suggest a formula improvement? We'd love to hear from you.
RetireCiv Support
We typically respond within 2 business days.
Social Security
Most FERS employees are covered by Social Security and earn benefits through their federal service. RetireCiv integrates Social Security into your full retirement picture, including the FERS Supplement. WEP and GPO were fully repealed effective January 2024. No reductions apply for current or future retirees.
Benefit Estimate
Projects your Social Security benefit based on your earnings history and chosen claiming age (62–70). Later claiming increases your benefit by approximately 8% per year.
Optimal Claiming Age
The calculator models break-even analysis across all claiming ages to help you identify the optimal strategy for your life expectancy and retirement income needs.
FERS Supplement
Estimates the Special Retirement Supplement paid from your retirement date until age 62. Calculated as: (SS benefit at 62) × (civilian FERS years ÷ 40). Bought-back military years do not count toward the numerator.
WEP & GPO: Repealed
WEP and GPO were fully repealed by the Social Security Fairness Act (P.L. 118-273), effective January 2024. No WEP or GPO reductions apply for benefits payable from January 2024 onward. The calculator reflects the repeal.
FERS Supplement Formula
SS Benefit at Age 62 × (Civilian FERS Years of Service ÷ 40)
Sources: SSA Retirement Benefits and Social Security Fairness Act cover claiming-age tables and the 2024 WEP/GPO repeal.