TMRS Calculator: Estimate Your Texas Municipal Retirement Benefit
Use this guide to understand the assumptions, inputs, results, and next steps behind the calculator.
Created by Luis Gonzalez · Last updated October 20, 2026
A TMRS pension estimate depends on your employee deposits, your city’s matching ratio, service credit, retirement timing, and the assumptions used to convert an account balance into monthly income. This calculator provides a planning estimate—not an official benefit quote—using your salary, service, city match, and projected retirement period.
With the default inputs, the calculator estimates a $2,765 monthly payout, a 60% salary replacement rate, an account balance of $482,187, and $862,680 in lifetime pension payments through age 87. Those figures reflect the calculator’s simplified model. Actual TMRS benefits are based on your city’s plan provisions and TMRS benefit calculations, so confirm your options through TMRS before making a retirement decision.
For a broader view, compare this estimate with a pension income projection, a retirement annuity estimate, or a retirement savings projection.
Enter the details that shape your estimate
Enter your average salary, years of service, employee deposit rate, and your city’s matching ratio. Use the salary figure the calculator expects—an average salary assumption, not necessarily your current paycheck. Enter current age and planned retirement age to set the projected years remaining until retirement.
The updated service credit field applies an additional percentage adjustment to the modeled account balance. Enter a value only if you have a basis for estimating it. The COLA rate estimates annual pension increases; it does not establish that your particular TMRS benefit includes a cost-of-living adjustment. The calculator also adds Social Security from the age you specify, but Social Security is shown separately from the estimated TMRS pension.
The defaults are age 42, retirement at 62, 20 years of service, $55,000 average salary, a 2:1 city match, and a 7% employee deposit rate. The calculator projects through age 88, assumes 2.5% inflation, 3% annual salary growth, and no COLA.
What TMRS matching and service credit mean
TMRS is a statewide retirement system in which participating cities choose plan provisions. A city’s matching ratio describes how its contributions are matched to a member’s deposits at retirement under the city’s plan. It should not be confused with a promise that the member’s final pension equals a fixed share of salary.
The calculator models matching as a city contribution equal to the employee deposit total multiplied by the match ratio. With a 2:1 ratio, $1 of modeled employee deposits adds $2 of modeled city matching. The calculator then treats those amounts as an account balance for purposes of its pension estimate.
Actual TMRS benefits can depend on provisions such as the city’s matching ratio, vesting requirements, service credit, retirement eligibility, and payment option. A survivor option may change the monthly amount. Review your member statement and city plan details; the TMRS benefit information explains the system’s own benefit structure.
The calculator’s updated service credit is a user-entered percentage adjustment, not a forecast of a specific TMRS credit award. The calculator also applies a simplified “Rule of 78” check using retirement age plus service at retirement. Treat that result as a calculator-specific indicator, not confirmation of eligibility. Ask TMRS or your employer which eligibility rules apply to you.
Worked example using the default inputs
The calculator begins by estimating employee deposits. It applies the 7% employee deposit rate to salary amounts adjusted using 3% annual salary growth. For the default inputs, the modeled total employee deposits are $160,729.
It then applies the 2:1 city match:
- Employee deposits: $160,729
- City matching amount: $160,729 × 2 = $321,458
- Modeled account balance: $160,729 + $321,458 = $482,187
The calculator assumes 26 retirement years, from age 62 through age 87, and uses a monthly annuity rate of 5% ÷ 12. Its annuity factor is about 174.48. The estimated monthly payout is:
$482,187 ÷ 174.48 = $2,765 per month
The annual pension is $2,765 × 12 = $33,180. The replacement rate compares that annual estimate with the $55,000 average salary:
$33,180 ÷ $55,000 × 100 = 60%
With no COLA, the pension-only lifetime estimate is $33,180 × 26 = $862,680. The calculator also reports that the Rule of 78 check is met: projected service at retirement is 20 + (62 − 42) = 40 years, and 62 + 40 = 102, above the model’s threshold of 78.
These are model outputs, not an official TMRS quote. The calculation does not fully reproduce every city’s plan terms or payment options. Compare with a pension withdrawal estimate and a 401(k) withdrawal projection if you expect to combine pension income with personal savings.
How the estimate is calculated
Employee deposits =
sum of modeled salary for each year × employee deposit rate
City match =
employee deposits × city match ratio
Modeled account balance =
employee deposits + city match
Monthly annuity factor =
[1 − (1 + monthly interest rate)^(-retirement months)]
÷ monthly interest rate
Estimated monthly payout =
modeled account balance ÷ monthly annuity factor
Annual pension =
estimated monthly payout × 12
Replacement rate =
annual pension ÷ average salary × 100
Lifetime pension =
sum of annual pension × annual COLA factor
for each projected retirement year
The annuity calculation assumes a fixed monthly interest rate of 5% ÷ 12 and divides the modeled balance across the projected payment period. It is not a TMRS annuity option quote and does not model every plan-specific actuarial feature. Inflation is used to calculate the calculator’s real-income series; it does not automatically increase the pension. The assumed COLA is a separate input.
Compare different planning assumptions
These scenarios demonstrate how changing one assumption changes the calculator’s underlying estimate. They are illustrative calculations, not official TMRS benefit quotes.
| Scenario | Change from defaults | Effect in this model |
|---|---|---|
| Lower city match | Match ratio 1.5:1 instead of 2:1 | The city match on $160,729 of deposits becomes about $241,094, lowering the modeled balance by about $80,364. |
| Higher deposit rate | Employee deposit rate 8% instead of 7% | Deposits and the modeled city match both rise; the deposit total scales by 8 ÷ 7, assuming the same salary path and service. |
| Later retirement | Retirement age 65 instead of 62 | Adds three modeled saving years and reduces the number of projected pension-payment years, which changes the annuity divisor. |
| Positive COLA assumption | COLA 1.5% instead of 0% | The starting monthly estimate is calculated the same way, but projected later-year payments and the lifetime total rise. |
A later retirement does not guarantee a particular increase in an actual TMRS benefit. Your official estimate may also reflect age-based eligibility, service-credit rules, and the payment option selected.
Planning around the pension estimate
A pension is only one part of retirement income. Add expected Social Security, savings withdrawals, and other income to see whether the total covers housing, healthcare, taxes, and everyday spending. Use the Social Security estimate alongside this calculator, and test how long personal savings could last with the retirement withdrawal calculator.
If you are deciding whether to retire earlier, compare the pension estimate with a FIRE projection and a retirement income analysis. If you have a workplace savings plan, the 403(b) calculator can help model contributions and growth. The military retirement calculator is a separate model for military retirement systems; its rules should not be applied to TMRS.
Check the assumptions on your TMRS member statement: service credit, city match, salary history, eligibility date, and payment options. Then compare the calculator’s result with an official estimate. A spouse or beneficiary may receive different income depending on the payment option, so compare the single-life estimate with survivor-benefit choices before treating the displayed monthly amount as spendable income.
For additional context, review how Social Security claiming age affects benefits and the pension income calculator. If your retirement plan includes IRA assets, estimate distributions separately with the IRA withdrawal calculator.
Frequently asked questions
Is this an official TMRS benefit estimate?
No. It is a simplified projection based on the entered assumptions. Request an official estimate from TMRS or your employer, particularly before choosing a retirement date or payment option.
Does the calculator’s 2:1 match mean my pension is twice my deposits?
No. The calculator multiplies modeled employee deposits by the city match ratio to create a modeled balance, then converts that balance into monthly income. Actual TMRS benefits follow the applicable city plan and TMRS rules.
Does every TMRS pension include a COLA?
No. The COLA input is an assumption for this projection, not confirmation that your benefit will receive an increase. Use the COLA stated in your official benefit information, or enter 0% if no adjustment is expected.
Should I retire earlier or work longer?
Working longer can add service and deposits while shortening the modeled payment period, but the right choice depends on actual eligibility, health, income needs, and benefit options. Compare multiple retirement ages and verify the official benefit estimate before deciding.
Does the replacement rate include Social Security?
No. It compares the calculator’s annual pension estimate with the entered average salary. Social Security is displayed separately in the income projection after the selected start age.
What should I do if my official estimate differs?
Check that the calculator’s service years, salary, city match, retirement age, and COLA assumptions match your records. Differences are expected because this tool simplifies TMRS plan calculations and payment options. The TMRS member resources are the appropriate source for your actual benefit.
Next step: verify the plan, then test the household budget
Use the estimate to identify questions, not to replace your member statement. Confirm your TMRS benefit and payment option, then combine it with Social Security and savings projections to see how much income you can rely on at each retirement age.