Project pension income under common defined-benefit assumptions.
Overview
Defined-benefit pensions estimate retirement income using service time, salary metrics, and plan-specific accrual formulas. Even small assumption changes can significantly affect expected monthly benefit.
This calculator helps approximate pension payouts and compare retirement timing options. It is useful for evaluating whether pension income can cover fixed post-retirement costs.
Final benefits depend on official plan documents, vesting rules, and early-retirement reductions, so validate all outputs against your provider statements.
Steps
Use total pension-eligible employment years.
Input final average salary or required salary metric.
Use plan formula percentage per service year.
Model normal and early retirement scenarios.
Include early-retirement penalties when applicable.
Compare income output against retirement budget.
Math
Annual pension ≈ Service years x Accrual rate x Final average salary
Many pension plans use a benefit formula based on credited service and salary base, then adjust for retirement age, survivorship elections, and plan-specific factors.
Worked cases
30 x 0.017 x 80,000
Estimated annual pension about $40,800 before elections.
40,800 x (1 - 0.12)
Reduced annual payout about $35,904.
Adjust service years and reduction factors for each age
Later retirement often increases benefit through added service and lower penalties.
Why use this
Questions