Pension Calculator

What this pension calculator does

This calculator estimates a defined-benefit pension from three inputs: final average salary, years of service, and the plan's benefit multiplier. The result shows the annual benefit, monthly benefit, and replacement rate.

It is a simplified formula illustration. Actual pension benefits depend on the plan's definition of final average salary, vesting, early-retirement reductions, survivor options, and cost-of-living adjustments.

How to use this calculator

1. Enter your final average salary.
2. Enter your years of service.
3. Enter the annual benefit multiplier as a percentage.
4. Click Calculate.

The default example uses a $75,000 final average salary, 30 years of service, and a 1.5% multiplier. The annual benefit is $33,750 and the monthly benefit is $2,812.50.

Pension formula

Annual benefit = Final average salary × Years of service × Benefit multiplier
Monthly benefit = Annual benefit / 12
Replacement rate = Annual benefit / Final average salary × 100

The benefit multiplier is the percentage of final salary earned for each year of service. A 1.5% multiplier for 30 years produces a 45% replacement rate before any adjustments.

What the results include

• Annual benefit: the estimated pension for one year.
• Monthly benefit: the annual benefit divided by 12.
• Replacement rate: the pension as a percentage of final average salary.
• Years of service: the service credit used in the calculation.

Assumptions and limitations

The calculator assumes a single-life pension with no early-retirement reduction, survivor reduction, or cost-of-living adjustment. It does not model lump-sum options, joint-and-survivor benefits, vesting schedules, or plan-specific salary definitions. The result is an estimate, not a plan statement.

Frequently asked questions

What is a benefit multiplier?

The multiplier is the percentage of final average salary credited for each year of service. Plans commonly use values such as 1%, 1.5%, or 2%.

What is final average salary?

It is usually the average of your highest consecutive years of pay, such as the final three or five years. This calculator uses a single salary input.

Does the calculator include early retirement reductions?

No. Retiring before the plan's normal retirement age can reduce the benefit. That reduction is not modeled.

What about a joint-and-survivor option?

A joint-and-survivor option usually reduces the monthly benefit to provide continuing income to a spouse. This version estimates a single-life benefit only.

Source

References:

• U.S. Department of Labor — What You Should Know About Your Pension
• Investor.gov — Pension Plans

Disclaimer

This calculator is for informational purposes only. It is not a pension statement or financial advice. Confirm your benefit with the plan administrator.