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Pension benefit estimator
Estimate the monthly income a defined benefit pension could pay, from your salary, years of service and plan formula.
Example Monthly pension $8,770
StockEducation Editorial Team · Updated · 15 min read · How we check our tools
The estimator
Estimate your pension
Output Calculated from your inputs
Before you start: The estimate uses a generic final average salary formula; your plan’s early retirement and cost of living rules may differ.
Your Pension Details
Enter your salary, service years and pension formula assumptions to estimate your projected monthly benefit.
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Illustration: annual pension = projected average salary × service at retirement × multiplier; monthly = annual ÷ 12. Salary grows at one fixed rate; the average uses up to the selected last 1, 3, 5 or 10 available projected years. The 30-year table applies one COLA rate. Figures are rounded, before tax, and exclude plan caps, vesting, early-retirement reductions and survivor options. Full method and limits.
Benefit Projection Over Time
| Year | Age | Monthly Benefit | Annual Benefit | Total Received |
|---|---|---|---|---|
| Click Calculate to see the projection | ||||
Educational notes
- Enter your details above to get educational planning notes.
Educational pension estimate: assumptions and limits
This illustrates a simplified salary × service × multiplier formula. It projects salary at one growth rate, averages available projected years and applies one COLA rate to 30 years of benefits. The replacement-ratio bands are tool labels, not official standards.
It does not apply your employer’s actual benefit caps, vesting, early-retirement adjustments, survivor elections, taxes or eligibility rules. Inputs and defaults do not establish entitlement or guarantee a pension. Confirm plan-specific benefits with the administrator; use qualified advice for personal retirement decisions.
Can I plan my retirement with this?
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.
A fixed COLA assumption does not model changing inflation or purchasing power. This estimate also excludes changes to your income or job, tax law, healthcare costs, longevity and plan-specific benefit rules.
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.
How to use it (three steps)
Enter your age, retirement age, salary and years of service so far, then your plan’s benefit multiplier, salary averaging period and cost of living adjustment. Press Calculate My Benefits. Your plan documents list the formula details. Not sure where to start? Load an example.
- 1Enter your age, retirement age, salary and years of service
- 2Add your plan’s multiplier and averaging period, then press Calculate
- 3Compare the estimate with your plan’s own statement
Your result in words
First year, before taxYour result will appear here once the estimator runs.
Compared with your pinned result
Compare two plans
Keep or share this result
Saved numbers and images stay on this device. A copied link holds only the tool inputs, nothing else.
How is a pension calculated?
Most defined benefit pensions use one formula: final average salary × years of service × benefit multiplier. In the default example, a 45 year old earning $75,000 with 20 years of service retires at 65 with 40 years in total. With 3% yearly raises, the final three year average salary is $131,551. Times 40 years times 2% gives $105,241 a year, or about $8,770 a month, replacing 80% of that salary.
Checked against Dept. of Labor · see sources
- The formula. Final average salary × years of service × multiplier.
- Replacement ratio. Years × multiplier: 40 × 2% = 80%.
- Years count most. Retiring at 60 instead of 65 cut the default from $8,770 to $6,620 a month.
- Averaging. Five years instead of three lowers the average salary.
- COLA. A 2% COLA lifts $105,241 to $125,773 by year ten.
- Check the rules. Early reductions, vesting and caps are plan specific.
The pension formulaWhat changes your pensionWhat to check in your planTest yourself
Part 1 of 3 · How it works
How does a defined benefit pension work?
A defined benefit pension promises a set income for life, worked out from your pay and how long you worked. It is different from a 401(k), where the result depends on what you save and how the investments do.1
What is the pension formula?
- Final average salary. Your average pay over your last few years, often three or five. The estimator grows today’s salary at your raise rate to project it.
- Years of service. The years you have worked under the plan, plus the years until you retire.
- Benefit multiplier. The percentage your plan credits for each year of service.
- Multiply them together for the yearly pension, and divide by 12 for the monthly amount.
$75,000 rising 3% a year for 20 years gives a final three year average of $131,551. With 20 years served and 20 more to come, total service is 40 years. $131,551 × 40 × 2% = $105,241 a year.
What is a replacement ratio?
It is your pension as a share of your final average salary. The default’s 80% comes from 40 years × 2%. A higher ratio means your pension covers more of your working income, though your spending in retirement may be lower or higher than that.
What is a COLA?
A cost of living adjustment raises your pension each year after you retire. With a 2% COLA, the default pension rises from $105,241 in the first year to $107,346 in the second and $125,773 in the tenth. Not every plan has one, and some cap it.
What is a pension worth compared with savings?
Take a second, smaller example. A final average salary of $60,000, 30 years of service and a 2% multiplier gives $60,000 × 30 × 2% = $36,000 a year, or $3,000 a month, replacing 60% of that salary.
Now ask what it would take to create the same income yourself. Using the common 4% withdrawal rule of thumb, $36,000 a year needs about $36,000 ÷ 4% = $900,000 in savings. That is a rough comparison, not a valuation, but it shows why a pension is often one of the largest assets a worker owns, even though it never shows up as an account balance.
The other difference is who carries the risk. In a defined benefit plan the employer funds the plan and promises a specific monthly benefit.5 If markets fall, the plan still owes you the formula amount. In a 401(k), a market fall lowers your balance directly. That is also why the estimator needs no return assumption: your pension depends on pay and years, not on how the investments did.
Salary × years × multiplier. Each of the three moves your pension in step.
Part 2 of 3 · What changes your pension
What changes your pension the most?
Every extra year of service and every raise feeds straight into the formula. So does the multiplier, which your plan sets.
How much does retirement age matter?
Monthly pension by retirement age, default career
What do the multiplier and averaging period do?
Averaging over five years instead of three lowers the final average from $131,551 to $127,794 and the pension to $8,520 a month, because earlier, lower salaries are included.
| Change | Monthly pension | Replacement ratio |
|---|---|---|
| Retire at 60 instead of 65 | $6,620 | 70% |
| 1.5% multiplier instead of 2% | $6,578 | 60% |
| 2.5% multiplier | $10,963 | 100% |
| 5 years served so far instead of 20 | $5,481 | 50% |
| No raises (0% salary growth) | $5,000 | 80% |
Figures checked against the preserved estimator formula. Illustrations, not a statement from your plan.
Why does changing jobs shrink a pension so much?
In many traditional final-salary plans, leaving stops further service accrual and leaves the benefit based on pay earned before departure. Plan rules, portability and later adjustments can differ. For a simplified comparison, assume two 30-year careers, full vesting, a one-year final-salary measure, a 2% multiplier, no early-retirement reduction or later adjustment, and $60,000 pay at the halfway point growing 3% a year.
- One employer for 30 years: the final salary grows to about $93,478, so the pension is 30 × 2% × $93,478 ≈ $56,087 a year.
- Two employers, 15 years each: the first pension freezes at 15 × 2% × $60,000 = $18,000. The second is 15 × 2% × $93,478 ≈ $28,043. Together, about $46,043.
Same years, same multiplier, about $10,000 a year less, just from splitting the career. Vesting matters too. For traditional private defined benefit plans under ERISA, the usual maximum schedules are 5-year cliff vesting or 7-year graded vesting starting at 20% after three years. Cash-balance and public-plan rules can differ.4 Leave before vesting and you may keep little or nothing from that employer.
Years of service are the biggest lever you control. Leaving early costs more than it looks.
Part 3 of 3 · Your plan’s rules
What does this estimator not know about your plan?
Every pension plan has its own rules. The estimator applies the basic formula, so check these details with your plan.
What should I check in my plan?
- Early retirement reductions. Many plans cut benefits for each year you retire before the plan’s normal age.
- Vesting. You may need a minimum number of years before you earn any pension.
- Caps and limits. Some plans cap the multiplier, the years counted or the final pay used.
- Survivor options. Choosing a pension that continues to a spouse usually lowers your monthly amount.
- Social Security. Some public jobs are not covered by Social Security; benefits depend on your covered-work record and other eligibility rules.
Your plan’s summary plan description lists these rules, and your plan can give you an official estimate.
What if my pension does not cover everything?
Most people combine a pension with Social Security and their own savings. The estimate is before tax, and pension income is usually taxable.
Plan the part your pension does not cover. The retirement calculator checks whether your savings, plus other income, cover your monthly spending to the age you choose.
Open the retirement calculator Free, no signup.What happens if my employer’s plan fails?
Most private sector defined benefit pensions are insured by the Pension Benefit Guaranty Corporation. For single-employer plans, it guarantees covered earned benefits subject to legal limits, including an age-adjusted maximum and other restrictions. Multiemployer guarantees use different rules.2 It does not add annual cost of living adjustments to benefits it pays, or insure health benefits or severance. Highly paid workers in a failed plan can receive less than their full pension.
Two more rules change what lands in your account. Pension payments are generally fully taxable unless you paid in after tax money, in which case the share that returns your contributions is tax free.3 And if you are married, the default payout is usually a joint and survivor annuity that keeps paying your spouse after you die, at a lower monthly amount.5
For public workers, the Social Security Fairness Act ended the WEP and GPO reductions for benefits payable for January 2024 and later.6
Use this for a first estimate, then ask your plan for the official number.
Mistakes to avoid
Three mistakes to avoid, and what to do instead
Using the wrong multiplier
Plans differ, and a 1.5% multiplier versus 2% changes the benefit by a third. Copy it from your plan document.
Ignoring the early retirement reduction
Most plans cut the benefit for every year before full retirement age. Check your plan’s schedule.
Forgetting survivor options
Choosing a joint and survivor benefit lowers the monthly payment but protects a spouse. Decide together before the paperwork.
Quick check
Three quick questions and one why
1. Final average salary $80,000, 25 years of service, 2% multiplier. What is the yearly pension?
2. What does a 70% replacement ratio mean?
3. In the default example, which change lowers the pension the most?
Why: why does retiring five years early cut the pension by about a quarter?
Retiring at 60 removes five years of service from the formula and five years of raises from the salary average. Both fall at once: 35 years instead of 40, on $113,477 instead of $131,551. Many plans then apply an early retirement reduction on top.
Common questions
Pension Benefit Estimator FAQ
How is a pension calculated?
Most defined benefit pensions multiply three numbers: your final average salary, your years of service and the plan’s benefit multiplier. With a $60,000 final average, 30 years and a 2% multiplier, the pension is $36,000 a year, or $3,000 a month. The final average is usually your pay over your last three or five years. Your plan may then reduce the amount for retiring early or for choosing a survivor benefit, so check its exact rules.
What is a defined benefit pension plan?
It is a retirement plan funded by your employer that promises a specific monthly income in retirement, worked out from a formula, usually your pay and years of service. The employer manages the investments and carries the risk if they do poorly. That is the key difference from a 401(k), a defined contribution plan, where your result depends on how much you save and how your investments perform. Many public employers and some large private ones still offer them.
What is a good pension multiplier?
There is no standard figure, since each plan sets its own, but small differences add up over a career. On the estimator’s default career, a 1.5% multiplier pays about $6,578 a month, 2% pays $8,770 and 2.5% pays $10,963. Years times multiplier gives the replacement ratio, so 30 years at 2% replaces 60% of your final average salary. Your plan’s summary plan description states the multiplier and any cap on years counted.
What happens to my pension if I leave my job early?
If you are vested, you keep the benefit you earned, but it is usually frozen at your salary and service on the day you leave and paid when you reach the plan’s retirement age. If you are not vested, you may get nothing from the employer’s share. Traditional private defined benefit plans under ERISA generally use no slower than 5-year cliff or 7-year graded vesting; cash-balance and public-plan rules differ. Ask the plan for a written statement of your vested benefit before you go.
Is my pension insured if the company goes bankrupt?
Most private sector defined benefit pensions are insured by the Pension Benefit Guaranty Corporation, a federal agency, up to a legal maximum that depends on your age when payments start. It covers basic benefits earned before the plan ended, but it does not add annual cost of living adjustments to payments or insure health benefits or severance. Public sector pensions are not covered by PBGC; they rely on the state or local government that sponsors them, and their protections vary by state law.
Is pension income taxable?
Usually yes. The IRS treats pension payments as fully taxable if you made no after tax contributions, and that is the case for most employer pensions. If you did contribute after tax money, the share of each payment that returns those contributions is tax free and the rest is taxable. Many states also tax pension income, while some exempt part or all of it. This estimator shows amounts before tax, so your take home figure will be lower.
Does a pension reduce my Social Security benefits?
Not anymore for most people, which corrects a common belief. The Social Security Fairness Act ended the Windfall Elimination Provision and the Government Pension Offset, so those reductions no longer apply to benefits payable for January 2024 and later. Some public workers still do not pay into Social Security in their pension jobs, so they may earn fewer Social Security credits. A pension from employment covered by Social Security generally did not trigger WEP or GPO. Other eligibility and benefit rules still apply.
How accurate is this pension benefit estimator?
It applies the standard formula with your inputs, so it is a good first estimate but not an official figure. It grows your salary at a steady raise rate, averages the final years you choose and multiplies by total service and your multiplier. It leaves out early retirement reductions, vesting, plan caps, survivor options and taxes. It has no connection to your plan or your records. Your plan administrator can give you the official benefit statement.
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Pensions on one card, and where to go next
- Step 1 · DoneHow a pension works
See it on one card
- The formula. Final average salary × years of service × multiplier.
- Replacement ratio. Years × multiplier: 40 × 2% = 80%.
- Years count most. Retiring at 60 instead of 65 cut the default from $8,770 to $6,620 a month.
- Averaging. Five years instead of three lowers the average salary.
- COLA. A 2% COLA lifts $105,241 to $125,773 by year ten.
- Check the rules. Early reductions, vesting and caps are plan specific.
- 2Step 2 · NowCover the gap
Check that savings and other income cover your spending in retirement.
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Sources and assumptions
- U.S. Department of Labor: Types of retirement plans. Explains defined benefit and defined contribution plans.
- Pension Benefit Guaranty Corporation: Single employer plans FAQs. What PBGC insures, the age based maximum, and what it does not cover, such as cost of living increases.
- IRS Topic No. 410, Pensions and annuities. Pension payments are fully taxable unless you made after tax contributions.
- U.S. Department of Labor: FAQs about retirement plans and ERISA. Vesting schedules for defined benefit plans and the summary plan description.
- U.S. Department of Labor: What you should know about your retirement plan. Benefit statements and the joint and survivor annuity for a spouse.
- Social Security Administration: Social Security Fairness Act. The WEP and GPO reductions no longer apply to benefits payable for January 2024 and later.
Method: the estimator grows today’s salary at the raise rate to retirement, averages the last 1, 3, 5 or 10 projected years, and multiplies that average by total years of service (years served plus years to retirement) and the benefit multiplier. The monthly amount is the yearly amount ÷ 12, and the projection table applies one COLA rate after retirement. The default example is age 45, retirement at 65, a $75,000 salary, 20 years served, 3% raises, a 2% multiplier, a three year average and a 2% COLA. Calculator scenarios were checked against the preserved formula. The job-change and savings comparisons are separate simplified arithmetic examples, not plan valuations. Figures are before tax and exclude plan caps, vesting, early retirement reductions and survivor options. All amounts are in U.S. dollars.
Page history. October 24, 2026: V11 design and guide integrated while preserving the working formula, validation, saved inputs and result controls.
StockEducation provides general education, not personal financial, tax or legal advice. Results are illustrations based on the assumptions you enter, not forecasts or promises of any return. Investing involves risk, including the loss of money you invest.
Sources and reference material
Primary sources and original reference material for the concepts discussed on this page.
References added 14 October 2026.
