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Estimate your future defined benefit pension income, monthly benefit, replacement ratio and final average salary. AU users with defined contribution super, or UK users with DC pensions, should use the Retirement Calculator instead.
A defined benefit pension is often based on salary, years of service and an accrual rate. A 30 year career with an average salary of $80,000 and a 1.5% accrual rate produces about $36,000 a year. The free StockEducation Pension Benefit Estimator uses salary, service, accrual rate, retirement age and plan assumptions to estimate annual or monthly income. Pension formulas, eligibility, increases, tax and payments to a surviving partner differ widely between plans. Confirm the result with the pension provider and the official plan documents.
Enter your salary, service years and pension formula assumptions to estimate your projected monthly benefit.
Your pension coverage assessment will appear here.
General education only — check the assumptions before using the result.
Purpose: This calculator is a general educational tool that performs a numerical calculation from the values you enter. It does not recommend, advertise or promote a specific financial product.
Assumptions: The calculation uses the input values and assumptions displayed in the calculator. Default values are illustrative starting points, not forecasts. Change each non-statutory assumption so it matches the scenario you want to test.
Limitations: Actual market returns, prices, dividends, interest rates, fees, tax, inflation and timing may differ from the assumptions. The calculator may omit factors relevant to you. Small input changes can materially change the result, so the output is an illustration rather than a prediction.
This financial calculator is not intended to be relied on for the purposes of making a decision in relation to a financial product. You should consider obtaining advice from a financial services licensee before making any financial decisions.
You can print this page or save it electronically using your browser controls. See ASIC Instrument 2026/41 for the conditions applying to generic financial calculators.
Disclaimer · Terms of Use
Treat it as an illustration, not a plan.
This shows what happens if one set of assumptions holds for the next few decades. It will not.
It does not account for market falls, inflation, changes to your income or job, tax law changes, healthcare costs, or how long you live. It assumes steady returns, and markets do not deliver those.
Decisions this size need a licensed professional who knows your full situation.
Educational content only. Pension estimates depend on plan rules, vesting schedules, salary history and administrator calculations. Always confirm results with your HR department or pension administrator.
A $75,000 salary, 2% benefit multiplier and 20 years of service produces an annual pension of about $30,000, or $2,500 per month, equal to a 40% replacement ratio of pre retirement income. The formula is final average salary times benefit multiplier times years of service. With salary growth and full career service, the same plan can replace 60 to 80% of final pay.
Defined-benefit pension and replacement ratio in three steps.
Sets the years of remaining service and the salary growth window.
Current annual salary and total years you will have served at retirement (current plus future).
The result panel shows Estimated First-Year Monthly Pension Benefit, plus Annual Benefit, Final Salary and Replacement Ratio cards, and a Benefit Projection Over Time table (year, age, monthly benefit, annual benefit, cumulative total received). The Replacement Ratio (pension as a percent of final salary) is what tells you whether the pension alone funds your lifestyle or just supplements other income.
A four-stage written walkthrough — the chapters a video would cover, available now in text.
Four chapters covering inputs, outputs and the common mistakes to avoid.
4 min watch. Auto captions available. Walkthrough chapters listed above.
Specific outcomes, not generic claims.
If you have a defined benefit pension, the formula is straightforward but rarely shown clearly. The calculator translates it into dollars.
How much of pre retirement income your pension actually replaces. Below 60% you likely need additional savings to maintain lifestyle.
Final average salary grows with promotions and inflation. See how aggressive vs conservative salary growth changes the benefit.
Most calculators hide the formula. We show it because understanding the math is the point.
The standard defined benefit pension formula. Three multiplicative components.
Final Average Salary
Benefit Multiplier
Years of Service
Annual Benefit
COLA
The projection is a mathematical model, not a forecast. Six assumptions baked into the math, plus what real outcomes look like.
Each card pairs an assumption the calculator makes with what real world investing actually looks like.
Reality: Some plans have stepped or capped multipliers (e.g. 2% for first 25 years, 1.5% after). Check your plan.
Reality: Different plans use 3 or 5 highest years; some use last years specifically. Plan documents define this.
Reality: Real salary paths include promotions, raises and plateaus. The calculator uses a single growth rate.
Reality: Breaks in service, part time work or vesting periods can reduce credited service.
Reality: Most plans reduce benefits for retirement before normal retirement age (often 65).
Reality: Joint and survivor options pay less monthly to provide spouse coverage.
Same base scenario, one variable changed at a time. The projection is highly sensitive to small changes.
The calculator assumes a smooth return every year. Here is how that compares to verified historical data.
Written by Dr. Charles Lo, Associate Professor, CPA. Reviewed annually.
A defined benefit pension promises a specific monthly income in retirement based on a formula. The plan sponsor (employer or government) bears the investment risk; the employee gets a predictable benefit. This contrasts with defined contribution plans (401k, super) where the employee bears the investment risk.
The standard formula has three multiplicative components: final average salary, benefit multiplier and years of service. A 2% multiplier with 30 years of service replaces 60% of final average salary; with 40 years it replaces 80%. Adequate retirement income from a DB plan typically requires full or near full career service.
Replacement ratio is the key planning metric. It is your retirement income divided by your pre retirement income. Below 60% indicates a lifestyle drop; 70 to 80% is generally considered adequate; above 90% is luxurious. DB pensions alone rarely produce above 80% even with full service.
Your annual benefit is roughly: final average salary × benefit multiplier × years of service. Multipliers are typically 1.0 to 2.5% per year of service; averaging periods are usually the 3 or 5 highest-earning years. Small differences compound — moving from a 1.5% to a 2.0% multiplier on 30 years of service is a 33% larger pension for life. COLA (cost-of-living adjustment) protects purchasing power but rarely fully matches inflation.
Use a conservative salary growth assumption (2 to 3% per year) for forward projection. Real salary growth includes inflation plus real wage growth plus promotions, but most career paths plateau.
Read the monthly benefit and replacement ratio. If replacement is below 70%, you likely need supplementary savings (401k, super, IRA, ISA) to maintain lifestyle. If above 80%, you may already be on a strong footing.
Compare to your actual current pre retirement spending, not gross income. Many retirees only need 60 to 80% of pre retirement income because work related expenses (commute, lunches, work clothes) stop.
Real numbers calculated from the same formula as the live tool. Every figure below is verified, not approximated.
$75k salary, 2% multiplier, 20 years, retire at 65
Government worker at age 45 projecting 20 more years of service.
$100k FAS, 2% multiplier, 35 years, retire at 65
Career employee with full service at a generous DB plan.
$60k salary, 1.5% multiplier, 12 years, retire at 65
Joined DB plan late; limited service credit.
$80k FAS, 2.5% multiplier, 25 years, retire at 55
Police or firefighter with enhanced multiplier and early normal retirement.
Age 45, $75k current, 3% salary growth, retire at 65, 2% mult, 20 yrs service
Projecting the impact of typical salary growth on final average salary.
The questions users most often ask about calculator output.
Yes. Free to use, no signup. Your inputs are not stored or shared.
A plan that promises a specific monthly income in retirement based on a formula (salary, service, multiplier). The plan sponsor bears investment risk.
Corporate DB plans 1 to 1.5%, government 1.5 to 2.5%, military and public safety 2 to 3%. Check your plan documents for your specific number.
Average of your highest paid years (typically 3 or 5). The averaging window is defined by the plan and can materially affect the benefit.
Pension income divided by pre retirement income. 70 to 80% is generally considered adequate to maintain lifestyle in retirement.
No. Add expected government pension income separately and compute combined replacement ratio.
Most plans reduce the benefit by 5 to 7% per year before normal retirement age. The calculator does not apply this; check your plan for the actual reduction.
Yes in most jurisdictions. Pension income is treated as ordinary income for tax purposes. Net spending power is lower than gross benefit.
Other tools for different parts of your financial picture.
The calculator uses the standard defined benefit pension formula common across US, UK, AU and other jurisdictions. Plan specific parameters vary; check your plan documents.
This calculator is provided for general educational purposes only. It does not constitute pension or financial advice. Actual benefits depend on your specific plan’s rules, vesting, early retirement reductions, survivor options, COLA and tax. Confirm with your plan benefits department before making retirement decisions.
This calculator gives you the number. Our free courses teach you the why behind the math, the assumptions to question, and how to apply it to your own portfolio.
Enter age, salary, service years, multiplier and averaging period. See monthly benefit, replacement ratio and year by year projection.
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