RetirementCalcByState
🏔️ MT Pre-Filled
Montana State Pension
Retirement Calculator 2026
Calculate your estimated Montana Public Employee Retirement Administration retirement benefit using the official formula. Montana’s 2026 rates are pre-loaded.
Formula: Years of Service × Final Average Salary × 1.785% = Annual Pension
1.785%
Benefit Multiplier
Top 3 yr avg
Final Avg Salary
5 yrs
Vesting Period
+SS
Social Security
🏛️ MPERA Calculator
Montana Pension Benefit Estimator
Enter your years of service and final average salary — Montana’s 1.785% multiplier is already loaded.
$
Using highest 3-year average
✓ Pre-filled — Montana 2026 rate
Annual Pension
—
Per year
Monthly Pension
—
Per month
Replacement Rate
—
% of final salary
Calculation Breakdown
Years of Service—
Final Average Salary—
Benefit Multiplier1.785%
Annual Pension Benefit—
Income Replacement0%
⚠️ This is an estimate based on the standard Montana Public Employee Retirement Administration formula. Actual benefits may vary based on your specific tier, early retirement reductions, survivor benefit elections, and other factors. Contact Montana Public Employee Retirement Administration for an official benefit estimate.
🏛️ Montana Public Employee Retirement Administration Facts
Benefit Multiplier
1.785% per year
Final Avg Salary
Highest 3-year average
Retirement Rule
Age 65 with 5 years, or Age 60 with 5 years (Rule of 85 for pre-2013 members)
Vesting Period
5 years
Employee Contribution
8.37% of salary
Employer Contribution
9.07% of salary
Social Security
Yes — members also receive Social Security
COLA
Yes — automatic annual COLA
System Overview
Montana MPERA covers most state and local government employees with a straightforward formula.
What to Know About Montana Retirement
- →Montana MPERA provides a 1.5% automatic COLA annually — providing reliable inflation protection for retirees.
- →Montana created Tier 2 in 2013 — members hired after July 2013 have a slightly different benefit structure.
- →The standard pension formula is: Years of Service × Final Average Salary × 1.785%. For a 30-year employee earning $65,000/year, this means $34,808/year in annual pension benefits.
Frequently Asked Questions
How is the Montana pension calculated?
The Montana Public Employee Retirement Administration uses this formula: Years of Service × Final Average Salary × 1.785%. Your “final average salary” is based on your highest 3-year average. For example, with 25 years of service and a $60,000 final average salary: 25 × $60,000 × 0.017849999999999998 = $26,775 per year.
When can I retire with a full pension in Montana?
Full retirement eligibility in Montana: Age 65 with 5 years, or Age 60 with 5 years (Rule of 85 for pre-2013 members). You may be able to retire earlier with a reduced benefit — contact Montana Public Employee Retirement Administration directly for your specific eligibility date based on your hire date and tier.
Does Montana pension replace Social Security?
Montana pension members also participate in Social Security. You will receive both your state pension AND Social Security benefits in retirement — two separate income streams.