Updated October 30, 2026. Quick answer: The Teacher Retirement System of Texas pays a standard annuity of 2.3% of your average salary for each year of service credit, and your tier decides how many of your highest annual salaries are averaged (three or five) and the age the Rule of 80 needs (none, 60 or 62). Computed for a Tier 1 member with 28 years of service and a $72,000 average salary retiring at 62, that is $46,368 a year (computed), or $3,864 a month (computed). A member who retires before the unreduced conditions are met gets a reduced annuity from a TRS table this page does not reproduce. Enter your own numbers below; this is the annuity before any payment option.
Calculate your TRS standard annuity
This page applies the standard annuity formula in the TRS Benefits Handbook to your tier, service credit, age and average salary. It runs on this page and sends nothing anywhere. Your tier is printed on your annual statement; the handbook says “Your tier is determined by the date you entered TRS membership”, along with your grandfathered status and your service credit on Aug. 31, 2014. Enter the service credit shown on your statement, whole years and months.
The handbook sends members to TRS’s own tools: “Retirement annuity calculators are available on the TRS website through MyTRS to assist you.” Use them for a decision. This page is the published formula, shown so you can see the arithmetic.
The formula, as TRS prints it
Every tier uses the same four lines. “Total Percent = Total Years of Service Credit x 2.3%”, then “Annual Annuity = Total Percent x Average Salary”, then “Monthly Annuity = Annual Annuity ÷ 12”. What differs by tier is the average salary: in Tier 1 the handbook says “Average Salary = Average of Three Highest Annual Salaries”, and in Tier 2 “Average Salary = Average of Five Highest Annual Salaries”.
| Tier | Average salary uses the | Rule of 80 route needs | Tier placement (summary of the handbook’s conditions) |
|---|---|---|---|
| Tier 1 | highest three | Rule of 80 alone | grandfathered in 2005, membership before Sept. 1, 2007, five years of credit by Aug. 31, 2014 |
| Tier 2 | highest five | Rule of 80 alone | not grandfathered, membership before Sept. 1, 2007, five years of credit by Aug. 31, 2014 |
| Tier 3 | highest five | Rule of 80 and age 60 | not grandfathered, membership Sept. 1, 2007 to Aug. 31, 2014, five years of credit by Aug. 31, 2014 |
| Tier 4 | highest three | Rule of 80 and age 60 | grandfathered in 2005, membership Sept. 1, 2007 to Aug. 31, 2014, five years of credit by Aug. 31, 2014 |
| Tier 5 | highest five | Rule of 80 and age 62 | not grandfathered, and under five years of credit on Aug. 31, 2014, membership from Sept. 1, 2014, or a withdrawal and return after that date |
| Tier 6 | highest three | Rule of 80 and age 62 | grandfathered in 2005, and under five years of credit on Aug. 31, 2014, membership from Sept. 1, 2014, or a withdrawal and return after that date |
Worked example, calculated for Tier 1: 28 years of service credit at 2.3% a year is 64.4% of a $72,000 average salary = $46,368 a year (computed), $3,864 a month (computed).
When the annuity is not reduced
A member gets the standard annuity with no early-age reduction at normal-age retirement. In Tier 1 the handbook lists two routes: “you are age 65 with at least five years of service credit”, or “you meet the Rule of 80 (your age and years of service credit total at least 80) and you have at least five years of service credit”. In Tiers 3 and 4 the Rule of 80 route also needs “you are at least age 60”, and in Tiers 5 and 6 “you are at least age 62”.
Worked example, calculated for the same 28 years and $72,000 in Tier 5 at age 60. Age plus service is 60 + 28 = 88, which meets the Rule of 80, but Tier 5 needs age 62 with it, so retirement at 60 is early-age. The standard annuity before the reduction is the same $46,368 a year (computed); at 62 the same member would have no reduction. For a Tier 3 member with 30 years and a $60,000 average salary at age 60, 2.3% x 30 = 69%, and 69% of $60,000 = $41,400 a year (computed), with no reduction because the age 60 condition is met.
Retiring early
A member who has at least five years of service credit but misses the normal-age conditions can still retire early. For Tier 1 the handbook lists “you are at least age 55 with five or more years of service credit but do not meet the Rule of 80” and “you have 30 or more years of service credit but do not meet the Rule of 80”. The annuity is then cut: “Actuarial tables detailing the percentage reduction applied to your annuity may be found on the TRS website within TRS Rule 29.12.” The size of the cut depends on tier, age and service. For one Tier 1 group the handbook gives only a ceiling: “The early-age reduction to your standard annuity may be as great as 53%, depending on your age at retirement.” The handbook also prints one exception: in Tier 4 and Tier 6 the handbook says “Your standard annuity is not reduced based on actuarial tables, but you are still considered an early-age retiree.” That applies to a member who is at least 55, under the tier age (60 in Tier 4, 62 in Tier 6), has at least 20 years of service credit and meets the Rule of 80, and the calculator says so for that case. For every other early-age case it shows the standard annuity before the reduction and says the reduction is not included.
What the standard annuity does not decide
1. The payment option. The standard annuity is the starting amount, before a survivor option. The trade between a bigger single-life check and a smaller joint check is covered on the single life versus joint and survivor page.
2. A lump sum. Some members can take part of the value up front. The handbook ties the Partial Lump Sum Option to being eligible for an unreduced annuity, and the details by tier are on the TRS Texas retirement decisions page.
3. When to retire. Each tier has a different age and service combination that removes the reduction, so a few months can be worth more than any single input. The state tax treatment of the annuity is on the Texas pension tax page. Federal tax is separate: “The taxable part of your pension or annuity payments is generally subject to federal income tax withholding.” The withholding form is described on the IRS page for Form W-4P: “so your payer can withhold the correct amount of federal income tax from your periodic pension, annuity”.
Where this calculator stops
It prices the standard annuity and tests the handbook’s eligibility conditions. It does not apply the early-age reduction tables, the Partial Lump Sum Option, DROP, the cost of buying service credit (the pension buyback calculator covers purchases in general), disability or death benefits, the Proportionate Retirement Program for service in another Texas system, or creditable-compensation limits on the salary figure. Tier placement itself follows entry date, grandfathered status and service credit on Aug. 31, 2014, and the handbook warns that a withdrawal and return after that date moves a member to Tier 5 or 6. Check your tier on your statement before you rely on the tier-specific results.
How it was checked: a second, independent engine (exact fractions, tier parameters read from the handbook text) agreed with this page’s engine on 60,000 random combinations of tier, service, age and salary, and the shipped script was driven in a browser on a grid of cases against both. The rule and the 2.3% were read from the TRS Benefits Handbook, September 2025 edition.
Common mistakes
- Using your current salary instead of the average of your highest three or five annual salaries. Tiers 1, 4 and 6 average three; Tiers 2, 3 and 5 average five.
- Assuming the Rule of 80 alone is enough. In Tiers 3 and 4 it needs age 60 as well, and in Tiers 5 and 6 age 62.
- Assuming a tier from your hire date alone. A withdrawal of contributions followed by a return after Aug. 31, 2014 changes the tier.
- Treating a pre-reduction figure as your check when you retire early. The reduction comes from a TRS table for your age and service.
Related: TRS Texas retirement decisions, public pension decisions by system, single life versus joint and survivor, and Texas retirement taxes.
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Answer againSources
- TRS Texas, Benefits Handbook (September 2025): https://trs.texas.gov/files/documents/benefits-handbook.pdf
- IRS, Topic no. 410, Pensions and annuities: https://www.irs.gov/taxtopics/tc410
- IRS, About Form W-4P, Withholding Certificate for Pension or Annuity Payments: https://www.irs.gov/forms-pubs/about-form-w-4p
Read from the system publications linked above on October 30, 2026. General information, not legal or tax advice, and not an estimate from the retirement system. Your own facts decide the outcome, and your retirement system, your plan administrator or a benefits advisor is the right place to confirm anything consequential.