How the calculation works
A defined-benefit pension scheme promises you a retirement income based on three straightforward factors: how long you worked, what you earned at the end, and a fixed percentage per year called the accrual rate. This calculator multiplies those three numbers to show your annual pension entitlement.
The formula
Annual Pension = Years of Service × Accrual Rate (%) × Final Salary
Worked example
Suppose you're retiring after 30 years with a company pension scheme.
- Years of service: 30 years
- Final salary: $60,000 per year (average of your last three years)
- Accrual rate: 1/60th, which equals 1.667% per year
Calculation:
30 × 0.01667 × $60,000 = $30,000 per year
You would receive $30,000 annually as your defined-benefit pension. If your scheme provides annual increases (for example, 2% per year for inflation), that figure would grow over time, but this calculator shows the starting amount.
Another example with a different accrual rate
If the same person had a scheme using a 1/80th accrual rate (1.25% per year):
30 × 0.0125 × $60,000 = $22,500 per year
The lower accrual rate produces a lower pension—a common trade-off in older or less generous schemes.
Things to watch
Verify your accrual rate. Pension schemes vary widely. Public-sector schemes often use 1/60th; private schemes might use 1/80th or even 1/100th. Check your scheme booklet or annual statement—this single number has a huge impact on your result.
Confirm what counts as 'final salary.' Some schemes average your best three years; others use your final year only, or your best year ever. A year with a bonus or promotion can significantly change the calculation. Your pension administrator should provide a definitive answer.
Include all service periods. If you've worked for multiple employers with the same scheme (e.g., transferred between divisions), or if you bought back service time, ensure your total years reflect everything that counts toward your benefit. Conversely, unpaid leave or career breaks typically don't count unless your scheme has special provisions.
This is your accrued benefit at retirement. The amount shown assumes you reach your scheme's normal retirement age and have completed all the service you've entered. Early retirement often reduces this figure; late retirement may increase it, depending on scheme rules.
Estimate, not professional advice. Pension calculations depend on scheme-specific rules, regulatory changes, and personal circumstances. Use this tool as a rough guide and verify your actual entitlement with your pension provider or a financial adviser before making retirement decisions.