Municipal Police Officers' Retirement System (MPORS)

Montana Codes Annotated Title 19, chapters 2 & 9

The MPORS is a multiple employer, cost-sharing defined benefit retirement plan established in 1974 and is governed by Title 19, chapters 2 & 9 of the MCA. This plan covers all municipal police officers employed by first- and second-class cities and other cities that adopt the plan. Benefits are established by state law and can only be amended by the Legislature. The MPORS provides retirement, disability and death benefits to plan members and their beneficiaries. Benefits are based on eligibility, years of service and compensation. Member rights for death and disability are vested immediately. All other rights are vested after five years of service. A brief summary of eligibility and benefits follows:

MPORS Summary of Benefits
Final Average Compensation (FAC)
  • Hired prior to July 1, 1977:
        Average monthly compensation of final year of service
  • Hired after June 30, 1977:
        Average monthly compensation for last 36 consecutive months
Years of Service required
and/or
Age eligible for benefit
  • 20 years, regardless of age
  • Age 50 with 5 years of service
Vesting 5 years
Monthly Benefit Formula 2.5% of HAC per year of service.
Guaranteed Annual Benefit Adjustment (GABA) After the member has completed 12 full months of retirement, the member's benefit increases by a maximum of 3% each January, inclusive of all other adjustments to the member's benefit.
Minimum benefit adjustment (non-GABA) If hired before July 1, 1997 and member did not elect GABA, the monthly retirement, disability or survivor's benefit may not be less than ½ the compensation of a newly confirmed officer in the city that the member was last employed. If a member or retiree elected GABA, the minimum benefit is not available.

MPORS Contribution Rates
Hire Date Member Employer State
Hired on or before to 6/30/75 5.80% 14.41% 29.37%
Hired after 6/30/75 & prior to 7/1/79 7.00%
Hired after 6/30/79 & prior to 7/1/97 8.50%
Hired on or after 7/1/97 & all previous hires electing GABA 9.00%