Calculate your estimated pension benefit using common defined benefit formulas. Enter your years of service, final average salary, and benefit multiplier to project your monthly and annual pension income at retirement.
A pension (technically a "defined benefit plan") promises retirees a fixed monthly income for life based on a formula that combines years of service, salary history, and a benefit multiplier set by the plan. They're distinct from 401(k)s and IRAs (defined contribution plans), which promise no specific benefit — you just get whatever your account balance buys at retirement. With a pension, the employer (or government) bears the investment risk and the longevity risk; the retiree just collects the promised check.
Pensions have become rare in the U.S. private sector — only about 15% of private-sector workers still have access to one — but remain common in public-sector employment (federal civil servants, military, state and local government, teachers) and in some heavily unionized industries. For the workers who have them, pensions are often the single most valuable financial asset they'll ever own, frequently worth more than a fully funded 401(k) over a working career.
This calculator uses the standard pension formula — Final Average Salary × Years of Service × Benefit Multiplier — to estimate your annual pension benefit. It accounts for expected salary growth between now and retirement, the averaging period (usually highest 3 to 5 consecutive years), and optional Cost of Living Adjustments (COLAs) that some pensions provide. Treat the output as a planning estimate. Your actual plan has specific provisions (vesting rules, early retirement penalties, survivor options, integration with Social Security) that the simple formula can't capture.
Currently 40 years old, teacher, $65,000 salary, 15 years of service. Plan to retire at 60 with 35 years total. State plan: 2% multiplier, 5-year FAS, no COLA. Salary growth: 2.5%/year for the next 20 years. Salary at retirement (year 20): 65,000 × 1.025^20 ≈ $106,500 FAS ≈ 65,000 × 1.025^18 ≈ $101,300 Annual Pension = $101,300 × 35 × 0.02 = $70,910 Monthly: ~$5,910. Without COLA, this stays at $5,910 for 30 years of retirement — losing about 50% real purchasing power by year 30 at 3% inflation.
Federal civil servant. Currently 45, $90,000 salary, 18 years service. Retirement at 62 with 35 years. FERS multiplier: 1% per year of service (1.1% if retiring at 62+ with 20+ years). 3-year highest FAS. Salary growth: 2.5%/year. Salary at retirement (year 17): 90,000 × 1.025^17 ≈ $136,800 FAS ≈ $134,000 (3-year average just before retirement) Annual Pension = $134,000 × 35 × 0.011 = $51,590 Monthly: ~$4,300. Plus full Social Security (FERS-covered employees pay into SS) and TSP balance — typical FERS retirees combine three income streams.
Joined at 22, retiring at 42 (20 years of service). Final base pay: $7,500/month (E-9 / O-5 range). Multiplier: 2.5% per year for the High-3 system (or alternative for newer Blended Retirement System). Annual Pension = $7,500 × 12 × 20 × 0.025 = $45,000 Monthly: $3,750. Plus COLA matching CPI (real value preserved). Plus pre-Medicare healthcare access and other benefits. Plus the ability to start a second civilian career at age 42 with the pension as supplemental income. Military pensions are unusually valuable both because of the COLA protection and the early-retirement age.
Use this calculator if you're a current employee of a workplace that offers a defined benefit pension and you want to understand what your benefit will look like at retirement. The big picture matters for planning total retirement income, deciding whether to stay in the position long enough to vest or hit higher service milestones, and evaluating job-change opportunities (leaving before vesting forfeits some or all pension accruals).
It's particularly useful when comparing job opportunities. A new role with a 10% higher salary may not actually be better compensation when you factor in pension value — a pension that pays $50,000/year for 25 retirement years is worth roughly $1.25 million nominal, often more than $750,000 in present-value terms. Walking away from a vested pension partway through your career is often a much larger financial decision than people realize.
Pair this with the Social Security calculator (most pensions are designed to integrate with SS), the annuity calculator (since a pension is essentially a lifetime annuity), the retirement-savings calculator (for the personal-savings portion of your retirement plan), and the FIRE calculator (to see whether the pension alone or pension + savings can support early retirement).
A real-world note: pensions are increasingly underfunded in some plans, particularly state and local government plans in certain states. Most are still solvent and paid in full, but some have made benefit reductions for new hires, increased employee contributions, or reduced COLAs to manage funding. Check your plan's funded ratio (target: 80%+) and your state's pension protection laws if you're relying on a pension as a primary retirement asset.
For private pensions, the Pension Benefit Guaranty Corporation (PBGC) insures the benefit up to specific limits if the plan terminates. The limits are generous enough that most retirees would receive their full promised benefit if their plan ever failed; higher earners with very generous formulas may face partial reductions.
Project your retirement savings growth and see if you are on track.
Estimate your Social Security benefits based on when you start claiming.
Calculate annuity payments from a lump sum or how much to invest for desired payments.
Calculate substantially equal periodic payments for early retirement distributions without penalty.
Estimate your 457(b) deferred compensation plan growth and retirement income.
Estimate how much monthly income your retirement savings can provide.
Per year of service (typically 1.5-2.5%)
Number of highest-salary years averaged
Cost of living adjustment in retirement
Monthly Pension
$5,996
Annual Pension
$71,954
Replacement Rate
58.5%
Lifetime Benefits
$2,304,704
| Year | Annual Benefit | Cumulative |
|---|---|---|
| 1 | $71,953.88 | $71,953.88 |
| 2 | $73,392.96 | $145,346.84 |
| 3 | $74,860.82 | $220,207.65 |
| 4 | $76,358.03 | $296,565.69 |
| 5 | $77,885.19 | $374,450.88 |
| 6 | $79,442.90 | $453,893.78 |
| 7 | $81,031.76 | $534,925.54 |
| 8 | $82,652.39 | $617,577.93 |
| 9 | $84,305.44 | $701,883.37 |
| 10 | $85,991.55 | $787,874.91 |
| 11 | $87,711.38 | $875,586.29 |
| 12 | $89,465.61 | $965,051.90 |