About the Pension Calculator
A pension calculator estimates the annual benefit from a defined-benefit scheme, using final average salary, years of service, and the scheme's accrual multiplier. Unlike a savings pot, a defined-benefit pension promises an income rather than a balance.
The formula
Annual pension = final average salary · years of service · multiplierThe multiplier, or accrual rate, is typically 1.5 to 2.5 percent per year of service. Final average salary is usually computed over the highest three to five years.
How to use this calculator
- 1Enter your Final Average Salary ($). The field starts at
75000, which you can overwrite. - 2Enter your Years of Service. The field starts at
25, which you can overwrite. - 3Enter your Benefit Multiplier (e.g. 2.0 for 2%). The field starts at
2, which you can overwrite. - 4Read the result straight away — it recalculates as you type, so there is no button to press. Use Share to copy a link that reopens the page with your exact numbers filled in.
Worked example
| Input | Value |
|---|---|
| Final Average Salary ($) | 75000 |
| Years of Service | 25 |
| Benefit Multiplier (e.g. 2.0 for 2%) | 2 |
Result
Annual Pension: $37,500.00
Monthly Pension: $3125.00
Replacement Rate: 50.0%
Those are the values the page loads with, so you can reproduce this result yourself and then change one field at a time to see what drives the outcome.
Understanding your result
Years of service and the multiplier compound in a way that rewards long tenure heavily. Twenty-five years at a 2 percent accrual gives 50 percent of final salary; thirty years gives 60 percent. This is why defined-benefit schemes historically encouraged careers with a single employer, and why leaving early can cost disproportionately.
A defined-benefit pension is considerably more valuable than an equivalent-sounding pot of money, because it transfers investment and longevity risk to the scheme. Replicating a 40,000 dollar inflation-linked lifetime income through an annuity purchase can cost a million dollars or more, which is worth remembering when comparing job offers.
Things worth knowing
- Check whether benefits are inflation-linked. An unindexed pension loses roughly a third of its purchasing power over twenty years at 2 percent inflation.
- Early retirement usually carries an actuarial reduction of several percent per year taken early.
- Survivor benefits reduce your own payment but protect a spouse. Consider the trade-off carefully.
- Some schemes integrate with social security, reducing the pension once state benefits begin.
- A lump sum offer should be compared against the present value of the lifetime income stream, not against your contributions.
Frequently asked questions
How is a defined-benefit pension calculated?+
Final average salary multiplied by years of service multiplied by the scheme's accrual rate. Twenty-five years at 2 percent on a 75,000 salary gives 37,500 a year.
What is the difference between defined benefit and defined contribution?+
Defined benefit promises an income based on salary and service, with the employer bearing investment risk. Defined contribution provides a pot whose value depends on contributions and market returns, with the risk on you.
Should I take a lump sum instead of the pension?+
Compare the lump sum against the present value of the guaranteed lifetime income, allowing for inflation indexation and survivor benefits. Lump sums are often less generous than they appear, though they offer flexibility and inheritability.
What happens if I leave before retirement age?+
Accrued benefits are usually preserved and payable from retirement age, though they may not be inflation-linked in the interim. Taking them early typically incurs an actuarial reduction.