Teacher Retirement Calculator: Combine Pension, 403(b), and Social Security
Use this guide to understand the assumptions, inputs, results, and next steps behind the calculator.
Created by Luis Gonzalez · Last updated July 6, 2026
Teacher retirement income may come from several sources: a defined-benefit pension, a 403(b) account, Social Security, or a combination. The calculator estimates monthly income from those sources using your retirement timeline, salary, service years, savings, and benefit assumptions. It also projects a salary replacement rate and lifetime income estimate.
A school employee’s actual benefits depend on the pension system, employment history, Social Security coverage, account investments, and claiming choices. Treat the projection as a planning scenario, then verify benefits with the pension plan, 403(b) provider, and Social Security Administration.
Enter your timeline and income assumptions
Enter current age, planned retirement age, life expectancy, current salary, and expected salary growth. Add current pension service years, the pension multiplier, and the final-average-salary period used by your plan. For the 403(b), enter the account balance, annual contribution, and assumed investment return.
Enter the estimated monthly Social Security benefit and the age you expect to claim it. The calculator includes Social Security only in years at or after the entered start age. The withdrawal rate estimates annual 403(b) income as a percentage of the projected retirement balance; the COLA assumption increases pension payments over time.
Default example: projected income at age 62
The defaults assume the person is 45, retires at 62, has 15 years of service now, earns $65,000, and expects 2.5% salary growth. The model adds 17 years of service before retirement, giving 32 total years. Its projected final average salary is $96,512.
The estimated pension uses the 2% multiplier:
Annual pension =
benefit multiplier × total service years × projected final average salary
2% × 32 × $96,512 ≈ $61,768
That is about $5,147 per month. The 403(b) balance grows from $85,000 with annual $6,000 contributions and a 7% assumed return for 17 years. The projected balance is $453,541; at a 4% withdrawal rate, it produces $18,142 annually, or $1,512 monthly.
Social Security is set to $1,200 per month beginning at age 67. Because retirement begins at 62, the calculator excludes it from first-year retirement income. The displayed total at retirement is $6,659 per month: $5,147 pension plus $1,512 from the 403(b). The total annual income is $79,910, and the replacement rate is 81% of projected salary at retirement.
Pension and 403(b) estimates are different kinds of income
A pension estimate is based on a formula using service, salary, and a multiplier. The 403(b) estimate is based on an account balance, assumed investment return, contributions, and a withdrawal rate. One is a modeled benefit stream; the other depends on account performance and withdrawals.
The calculator projects the 403(b) balance by applying the return and then adding each annual contribution. It estimates income as a fixed percentage of the retirement balance and holds that annual dollar amount level in its income projection. Actual withdrawals may need to change with investment returns, inflation, taxes, or spending needs.
A 4% withdrawal rate is an input assumption, not a guarantee that the account will last. Explore a different drawdown assumption with a retirement withdrawal calculator or retirement withdrawal strategy calculator. Use a 403(b) calculator to focus on contributions and account growth.
Formula: modeled teacher retirement income
Total service at retirement =
current service years + (retirement age − current age)
Annual pension =
benefit multiplier × total service
× projected final average salary
403(b) balance at retirement =
repeat for each saving year:
prior balance × (1 + annual return) + annual contribution
Annual 403(b) income = retirement balance × withdrawal rate
Total annual income = annual pension + annual 403(b) income
+ Social Security when retirement age is at or beyond its start age
The calculator estimates final average salary by averaging projected salaries over the entered final-average period. It uses rounded outputs for displayed annual and monthly amounts. Its assumptions do not model taxes, fees, contribution limits, pension survivor choices, or variable investment returns.
Compare different retirement ages and savings assumptions
The scenarios below change inputs from the default. Pension and account income are shown as calculator-style estimates; actual results depend on plan provisions and investment experience.
| Scenario | Retirement age | Current 403(b) balance | Annual contribution | Main modeled change |
|---|---|---|---|---|
| Default projection | 62 | $85,000 | $6,000 | Monthly total at retirement: $6,659 |
| Retire later | 65 | $85,000 | $6,000 | More service and saving years; Social Security starts at 67 |
| Save more | 62 | $120,000 | $8,000 | Higher projected 403(b) balance and withdrawal income |
| Lower withdrawal assumption | 62 | $85,000 | $6,000 | 3% withdrawal rate instead of 4% lowers modeled account income |
Working longer can raise pension service and give savings more time to grow, while delaying retirement also postpones withdrawals and may change Social Security timing. Saving more can increase future account income, but the calculator does not assess whether contributions fit your budget or plan limits.
Frequently asked questions
Does the calculator include Social Security at retirement?
Only if the entered retirement age is at least the Social Security start age. With the defaults, retirement begins at 62 and Social Security starts at 67, so it is excluded from first-year income.
Is the 403(b) income guaranteed for life?
No. It is an estimate based on a withdrawal percentage of a projected account balance. Investment results, fees, inflation, and actual withdrawal choices can change how long the account lasts.
Should I retire at 62 or work longer?
Compare the added pension service, additional 403(b) contributions and growth, Social Security timing, health coverage, and desired spending. The calculator can show changed assumptions, but it does not value leisure time, employment risks, or health benefits.
Does the replacement rate mean I can maintain my current lifestyle?
No. It compares modeled annual retirement income with projected salary at retirement. It does not measure your spending, taxes, healthcare costs, or whether work-related expenses disappear.
How does the calculator estimate the pension?
It applies the benefit multiplier to projected service and final average salary. Your retirement system may use a different formula, final-average period, eligibility threshold, or early-retirement reduction. Confirm the official estimate with your plan.
Does inflation affect every income source in the projection?
No. The calculator applies its COLA to pension income in the yearly projection. It does not inflate the 403(b) withdrawal amount or Social Security benefit in this calculation, so future purchasing power may be overstated if those amounts remain fixed.
Next steps for an educator’s retirement plan
Compare retirement ages, contributions, withdrawal rates, and Social Security start ages. Verify the pension estimate with your plan and use your account provider’s projections for the 403(b). For a combined income plan, compare the Teacher Pension Calculator, Pension Income Calculator, Pension Contribution Calculator, ATRS Arkansas Teacher Calculator, Retirement Annuity Calculator, Pension Withdrawal Calculator, and Military Retirement Calculator.
For account withdrawals, see how to withdraw from retirement accounts tax-efficiently and the best order to withdraw from retirement accounts. Related planning tools include the FIRE Calculator, retirement number calculator, retirement needs calculator, 401(k) Withdrawal Calculator, tax-efficient retirement withdrawal calculator, pension lump sum calculator, IRA calculator, and FERS annuity supplement calculator.