Teacher Pension CalculatorPlain-English estimates for Montana teachersUnofficial
Montana TRS · Free calculator · No login

What will your Montana TRS pension actually pay?

The Montana Teachers' Retirement System (Montana TRS) pays pensions to Montana's public school teachers. Estimate your benefit: your tier, your monthly Normal Form amount, when you can retire with no reduction, and what one more year is worth.

Updated for the Montana TRS: Understand Your Benefits (web page) and fact sheets, Fetched Nov. 12, 2026; fact sheets revised 2019-2026 · Last reviewed

  • 1/60 of your AFC a year (1.6667%); 1.85% for Tier Two at 60 with 30 years
  • 3 or 5 highest consecutive fiscal years make your AFC
  • July 1, 2013 the membership date that splits Tier One from Tier Two

Montana teacher pension calculator

1 About you
2 Your Montana TRS account
More details (optional)
Your estimated monthly benefit

Fill in the form and we'll show your tier, your Normal Form benefit, when you can retire with a full benefit, any early-retirement reduction period, what working longer adds, and the rules for going back to work.

Early-retirement amounts and Options A, B, C and the period-certain options are labeled "Check with Montana TRS": Montana TRS doesn't publish the factors behind them.

Try an example

Montana TRS publishes no worked benefit examples, so these are ours, run on Montana TRS's rules. Tap one to load it into the calculator.

MCA 19-20-804; 19-20-703(1); Montana TRS web page: Understand Your Benefits (Standard Benefit Calculation Formula; Tier 2 Professional Option); MCA 19-20-101(34), 19-20-801(2)-(3), 19-20-802(1)(b), 19-20-804, 19-20-805(1)(b); Montana TRS web page: Understand Your Benefits (Tier 2 Service Retirement; Tier 2 Professional Option); Actuarial Valuation (July 1, 2025), pp. 47-48, Appendix B; Montana TRS FY2025 ACFR, p. 19 (Summary of Benefits)

Common questions

How is a Montana TRS pension calculated?

Years of creditable service × your average final compensation (AFC) × 1/60 (1.6667%) a year, paid monthly. AFC is your highest 3 consecutive fiscal years (Tier One) or highest 5 (Tier Two). Tier Two members who retire at 60 or older with 30 or more years get 1.85% a year instead.

Am I in Tier One or Tier Two?

Tier One if you became a Montana TRS member before July 1, 2013 and never withdrew your account. Tier Two if you joined on or after that date, or withdrew and came back.

When can I retire with a full benefit?

Tier One: at 60 with 5 years, or at any age with 25 years. Tier Two: at 60 with 5 years, or at 55 with 30 years. Vested members can retire earlier with a reduction: from 50 in Tier One and 55 in Tier Two.

How much does early retirement reduce my benefit?

The reduction runs for the shorter of the years until you'd turn 60 and the years until you'd have 25 (Tier One) or 30 (Tier Two) years of service. Montana TRS uses actuarial factors it doesn't publish, so this site shows the unreduced amount and the reduction period only. Check with Montana TRS for your reduced amount.

Does Montana TRS have a cost-of-living increase?

Yes, the Guaranteed Annual Benefit Adjustment (GABA): each January 1 after at least 36 monthly payments. 1.5% a year for Tier One; 0.5% for Tier Two while the system is under 90% funded.

Is this the official Montana TRS calculator?

No. This is an unofficial estimate built from Montana TRS fact sheets, web pages and Montana law. It isn't affiliated with Montana TRS. Montana TRS can give you an official Estimate of Benefits; its toll-free number is 866-600-4045.

Compare Montana with other states

All state comparisons

Plain-English guides

How your pension works

Tier One or Tier Two?The July 1, 2013 membership date, what it changes, and the rule for members who withdrew and came back.The formula, AFC and termination payYears × AFC ÷ 60, 1.85% for Tier Two at 60 with 30 years, the 110% cap and termination pay options.Early retirementFrom 50 (Tier One) or 55 (Tier Two): how many years the reduction covers, and why we don't guess the percent.Buying service creditUp to 5 years of out-of-state, military and other service, redeposits, and extra-duty stipend credit.Montana TRS glossaryPlain-English definitions of AFC, GABA, the break in service and other Montana TRS terms.

Planning your exit

Leaving: refund or wait?Vesting at 5 years, the refund of your contributions plus interest, and when you must start a benefit.Taxes on your pensionFederal and Montana withholding, Montana's 65+ subtraction ($5,500 for tax year 2024) and the local exemption.Montana TRS and Social SecurityWhat Montana TRS's sources say about Social Security, and what they leave unsaid.

After you retire

Working after retirementThe 120-day break, the 49% earnings limit, the 2027 and 2029 changes, and emergency hires. There's no DROP.The GABA1.5% each January for Tier One, 0.5% for Tier Two while under 90% funded, after 36 payments.Retiree health insuranceMontana TRS has no health plan; your employer's group plan and the premium deduction.Death, survivor and disability benefitsThe account balance or a lifetime benefit, the $500 death benefit, $200 a month per child, and disability.

More calculators

One more year?What a year adds: 1/60 of your AFC, a shorter early cut, and for Tier Two the jump to 1.85%.Payment optionsThe Normal Form, Joint and Survivor Options A, B and C, and 10- or 20-year period certain, in plain English.

Montana TRS has no DROP (deferred retirement option plan): none of the Montana TRS sources or the statute describes one. MCA Title 19, Chapter 20 (Parts 7-8); Actuarial Valuation (July 1, 2025), pp. 47-51, Appendix B These pages cover Montana TRS members: teachers, administrators and others whose jobs are mainly educational. School office, kitchen and custodial staff and bus drivers are usually in Montana PERS instead. Working After Retirement fact sheet (Mar. 26, 2026), p. 4; Montana TRS FY2025 ACFR, pp. 31-33 (Summary of Benefits - PERS Plan)

Source: Montana TRS: Understand Your Benefits (web page) and fact sheets, Fetched Nov. 12, 2026; fact sheets revised 2019-2026, fact sheets: Withdrawing TRS Membership p. 1; Working After Retirement p. 4. Also: Montana TRS web pages: What is GABA, Retirement Prep, Benefit Payments; Actuarial Valuation (July 1, 2025); FY2025 Annual Comprehensive Financial Report; New Member handout (Feb. 25, 2025); 2023 Legislative Summary; MCA §§ 19-20-101, 19-20-603, 19-20-702, 19-20-703, 19-20-719, 19-20-801, 19-20-802, 19-20-804, 19-20-805. Last reviewed .