Mississippi PERS Retirement Calculator: How to Use It
Mississippi PERS uses a 2.0% formula with a four-year FAS window. Tier determines when you can retire: Tier 1 members have more lenient thresholds than Tier 2 members who joined after July 2011. No COLA means your purchasing power erodes over a long retirement.
What this calculator does
The Mississippi PERS Retirement Calculator computes your Public Employees Retirement System defined benefit pension using the 2.0% formula. It handles both Tier 1 (joined before July 1, 2011) and Tier 2 (joined on or after July 1, 2011), applies the correct full-retirement eligibility rules for each tier, and calculates the 4% per year early retirement reduction for members who retire at 55 before reaching normal retirement thresholds.
The calculator uses the four-year FAS window and shows your estimated annual and monthly gross pension before taxes. Mississippi PERS provides no automatic COLA, so the figure you see at retirement is essentially your benefit in nominal dollars for life.
What each input means
Member tier
Your tier is determined by your PERS enrollment date. Tier 1 is for members who joined before July 1, 2011. Tier 2 is for members who joined on or after that date. If you're unsure which tier you're in, check your PERS member statement or annual benefit summary. Tier affects your retirement eligibility thresholds but not the 2.0% accrual rate or four-year FAS window, which are the same for both tiers.
Current age
Your age today. The calculator uses this to determine whether you meet the normal retirement age requirement (60 for both tiers) or qualify for full retirement via the service-only threshold (25 years for Tier 1, 30 years for Tier 2). It also determines whether the early retirement option at 55 applies.
Years of PERS service
Your total creditable service with Mississippi PERS. This includes active service in covered positions plus any purchased service credit for prior public employment, military service, or approved leaves. Your annual PERS statement lists your credited service balance. Use the confirmed balance; pending purchases should not be included until finalized.
Final Average Salary (4-year)
PERS uses the average of your four highest years of earnable compensation in your last ten years of covered service. For most members, this is the last four years of base salary before retirement. Earnable compensation includes your regular salary but excludes lump-sum leave payouts and most one-time bonuses. Enter the figure you expect this four-year average to be at the time you retire.
Planned retirement age
The age at which you plan to start drawing your pension. The calculator checks this against your tier's eligibility rules to determine whether the benefit is full or reduced. If you're below 55 and haven't met the service threshold, the calculator will show the earliest date you'd be eligible.
Understanding the outputs
The pension formula is: 2.0% times years of creditable service times FAS. A Tier 1 member with 25 years of service and a $55,000 FAS receives 0.020 x 25 x $55,000 = $27,500 per year. A Tier 2 member with 30 years and the same FAS receives 0.020 x 30 x $55,000 = $33,000 per year.
Early retirement at age 55 applies a 4% reduction per year before normal retirement. If you're a Tier 1 member who would normally qualify at 60, retiring at 57 is three years early, and the reduction is 12%. On $27,500 that means $3,300 less per year, permanently. The reduction does not go away once you reach normal retirement age.
Mississippi PERS provides no automatic COLA. A pension of $27,500 in 2026 will still be $27,500 in 2041 in nominal terms, but in real purchasing power it will be worth meaningfully less. If you retire at 60 and live to 85, plan for 25 years of inflation eroding the real value of your benefit.
Most PERS-covered positions are not covered by Social Security. If you have Social Security credits from other employment, add that separately when projecting total retirement income. The WEP calculator on this site can help estimate how your PERS pension might reduce a Social Security benefit from prior covered work.
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See how another Southern-tier state pension compares with a BackDROP option
Frequently asked questions
What is the difference between Tier 1 and Tier 2 in Mississippi PERS?
Both tiers use the same 2.0% accrual rate and four-year FAS. The difference is eligibility. Tier 1 (joined before July 2011): full retirement at 60/4+ or any age with 25 years. Tier 2 (joined July 2011 or later): full retirement at 60/8+ or any age with 30 years.
How is the Final Average Salary calculated for Mississippi PERS?
It's the average of your four highest years of earnable compensation in your last ten years of covered service. For most members near retirement, this is effectively the last four years of base salary.
What is the early retirement reduction for Mississippi PERS?
At age 55 with sufficient service, you can retire early with a permanent 4% reduction per year before normal retirement age. Five years early means a 20% permanent reduction.
Does Mississippi PERS provide a COLA?
No. The pension is fixed in nominal dollars at retirement with no automatic inflation adjustment. Plan for purchasing power to erode over a long retirement.
Does Mississippi PERS coordinate with Social Security?
Most PERS-covered positions are not covered by Social Security. If you have Social Security credits from prior private-sector work, your benefit may be reduced by the Windfall Elimination Provision.