Pension Benefit Estimator Formula

Understand the math behind the pension benefit estimator. Each variable explained with a worked example.

Use the Pension Benefit Estimator

Formulas Used

Annual Pension Benefit

annual_pension = years_of_service * benefit_multiplier / 100 * final_avg_salary

Monthly Pension

monthly_pension = years_of_service * benefit_multiplier / 100 * final_avg_salary / 12

Income Replacement Rate

replacement_rate = years_of_service * benefit_multiplier

Variables

VariableDescriptionDefault
years_of_serviceYears of Service(years)25
final_avg_salaryFinal Average Salary(USD)85000
benefit_multiplierBenefit Multiplier(%)1.5

How It Works

Defined Benefit Pension Formula

Annual Pension = Years of Service x Multiplier x Final Average Salary

The multiplier typically ranges from 1% to 2.5% per year of service.

Example Multipliers

| Employer Type | Typical Multiplier | |---|---| | Federal government | 1.0-1.1% | | State/local government | 1.5-2.5% | | Private sector | 1.0-1.5% |

Worked Example

25 years of service, $85,000 final average salary, 1.5% multiplier.

years_of_service = 25final_avg_salary = 85000benefit_multiplier = 1.5
  1. 01Annual pension = 25 x 0.015 x $85,000
  2. 02= 0.375 x $85,000 = $31,875/year
  3. 03Monthly = $31,875 / 12 = $2,656
  4. 04Replacement rate = 25 x 1.5% = 37.5%

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