Estimate a defined-benefit pension, compare retiring earlier vs later, and check whether a lump-sum offer beats keeping the monthly pension.
The standard final-average-salary formula: salary x accrual rate x years of credited service. This is the unreduced single-life benefit, before any early-retirement reduction or survivor election.
Estimates for planning only. Your plan document governs: early-retirement reductions, survivor and joint-and-survivor elections, service caps, offsets and COLA rules all change the benefit and are not modelled here. The lump-sum comparison values payments over your stated life expectancy at your chosen discount rate; it is not an actuarial valuation and ignores taxes. Confirm figures with your plan administrator before making an irreversible election.
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A pension calculator helps you estimate monthly and annual retirement income based on final salary, accrual rate, and years of service. This page goes beyond a basic estimate by showing replacement ratio, lifetime payout projections, scenario comparisons, and lump sum value analysis. Use it to plan retirement cash flow with clear assumptions before making pension decisions.
A pension calculator estimates income from a defined benefit pension plan. Most plans use a formula based on final average salary, accrual percentage, and years of service. The most important outputs are monthly pension, annual pension, and replacement ratio compared with pre-retirement income. For decision-making, inflation and tax assumptions are also critical.
Core Pension Formula
Estimate pension income from years of service and accrual rate before final retirement paperwork.
Compare how working a few additional years may increase monthly pension and lifetime payouts.
Use replacement ratio results to determine how much additional savings you need from 401(k), IRA, or taxable accounts.
Assess whether a pension lump sum offer is attractive relative to projected annuity value.
Model pension purchasing power under different inflation and COLA assumptions for more resilient retirement plans.
Get an immediate monthly and annual pension estimate using the same core inputs pension plans use.
See how much of your working income your pension could replace so you can identify any retirement income gap early.
Model baseline and alternative scenarios to evaluate how delaying retirement or adding service years affects payout.
Project inflation-adjusted pension value and after-tax monthly income to plan spending more realistically.
Compare a lump sum offer to annuity value so you can make better buyout and distribution decisions.
Most defined benefit pensions use a formula like final average salary multiplied by accrual rate multiplied by years of service. Some plans include caps, reductions, or survivor options that can change final payout.
Many retirement plans target total income replacement around 70% to 80% of pre-retirement income. If your pension replacement ratio is lower, you may need additional savings from 401(k), IRA, or other assets.
Early retirement can reduce total pension income due to fewer service years and possible early-retirement reductions. Always compare monthly payout and lifetime payout scenarios before deciding.
Cost-of-living adjustments increase pension payments over time, which helps protect purchasing power. If inflation runs above COLA for long periods, real retirement income can still decline.
That depends on your pension replacement ratio, expected spending, and healthcare costs. Many retirees with pensions still use tax-advantaged savings for flexibility and inflation protection.
Estimate the present value of monthly pension payments using a discount rate, then compare that value with the lump sum offer. Taxes, longevity expectations, and investing discipline are key decision factors.
Compare the offer against what the monthly pension is worth today. Discount every future payment at the return you could realistically earn on the money, then check the breakeven age — the age you must reach for the pension to have paid more. If you expect to live past that age, are in good health, or value guaranteed income, the pension usually wins. If the offer exceeds the pension present value, you want control of the money, or you doubt the plan sponsor, the lump sum can be better.
It is the age at which the pension payments you have collected, discounted at your investment rate, finally add up to the lump sum you were offered. Live past it and the pension wins; die before it and the lump sum was worth more. Breakeven is very sensitive to the discount rate: at a higher assumed return, the lump sum compounds faster and the breakeven age moves later.
Substantially. A pension that rises with inflation is worth far more than a flat one. In a typical case, adding a 2% annual COLA raises the pension present value by roughly a fifth and pulls the breakeven age several years earlier. Many private-sector pensions have no COLA, while most public-sector plans do — check your plan before comparing.
They solve different problems. A pension pays a guaranteed income for life and shifts investment and longevity risk to the employer, but you rarely control it and it may not keep pace with inflation. A 401(k) is yours, is portable and inheritable, and can grow faster, but you carry the market and longevity risk. Many people are best served by a pension as a guaranteed floor plus a 401(k) on top.