Mississippi PERS Retirement Calculator

The 2% formula: consistent, if not generous

Mississippi PERS uses a 2% multiplier on every year of service across both tiers. That's at the national average. Louisiana's 2.5% is higher. Indiana's 1.1% is much lower. Mississippi's 2% puts it squarely in the middle of the pack.

A teacher or state employee with 25 years of service and a $52,000 FAS receives 0.02 x 25 x $52,000 = $26,000 per year, or $2,167 per month. That's 50% of salary replaced by the pension after 25 years. At 30 years and the same salary: $31,200 per year, 60% replacement. Each additional year adds 2 percentage points of salary replacement.

The FAS window is 4 years. Not the 3-year window used by Alaska and Louisiana, not the 5-year window used by Texas. Four years averages more salary history than a 3-year window, which generally produces a slightly lower FAS for employees who received consistent raises. For someone whose salary plateaued in the last few years, a 4-year window versus a 3-year window might make a meaningful dollar difference.

Tier 1's 25-year provision: the most important difference between tiers

Tier 1 members hired before July 1, 2011 can retire at any age once they hit 25 years of service. No minimum age. A teacher hired at 22 who stays 25 years retires at 47 with a full unreduced pension. That's unusual. Most state pension systems have either a minimum age requirement or require age plus service to reach a certain sum.

At 47 years old with a $2,000 monthly pension, if that person lives to 82, they collect for 35 years. Total nominal payout: $840,000. Without inflation adjustment, the real value erodes, but the early start more than compensates for many members.

Tier 2 changed this significantly. After July 1, 2011, new members need 30 years at any age for unreduced retirement. That's 5 more years of service than Tier 1. For the teacher hired at 22, the difference is retiring at 47 versus 52. Five years. At $2,000/month, that's $120,000 in additional pension payments the Tier 1 member collects that the Tier 2 member doesn't.

Tier 2 also changed the vesting requirement. Tier 1 vests at 4 years. Tier 2 vests at 8 years. A Tier 2 member who leaves after 7 years gets nothing. A Tier 1 member who leaves after 4 years is vested and entitled to a deferred pension.

Early retirement at 55: the 4% per year cost

Both tiers allow early retirement at age 55 with vested service (4 years for Tier 1, 8 years for Tier 2). The reduction is 4% per year for each year before age 60.

Retiring at 57: 3 years early, 12% reduction. On a $2,500 base benefit, the monthly check is $2,200. Retiring at 55: 5 years early, 20% reduction. $2,500 becomes $2,000. These reductions are permanent. They don't phase out when you reach 60. The reduced amount is the benefit for life.

At 4% per year, Mississippi's early reduction is steeper than Kansas (0.5%/month or 6%/year but applied monthly) and comparable to states like Ohio (4%/year). It's gentler than Louisiana Tier 3's 3%/year before age 62, which can accumulate larger reductions over a longer early period.

The 3% COLA and the funding situation

Mississippi PERS provides a guaranteed 3% annual COLA for Tiers 1-4. Before age 60, the increase is simple (non-compounding): a flat 3% of the original benefit added each year. After age 60, the 3% compounds, meaning each year's increase is calculated on the prior year's benefit including all previous COLA increases. Retirees can choose to receive the COLA as monthly additions or as a lump sum each December.

The compounding COLA after age 60 is among the most generous in the country. At 3% compounding, a $2,750 monthly benefit grows to roughly $3,695 after 10 years and $4,966 after 20 years. That's real inflation protection, something most state pension systems don't offer at that level.

That generosity comes at a cost to the fund. Mississippi PERS has one of the lower funded ratios among state pension plans nationally, around 56% as of recent valuations. The 3% compounding COLA is a significant driver of the unfunded liability. The 2025 reform created Tier 5 for new hires (March 1, 2026+) with no guaranteed COLA, specifically to address this pressure.

For current Tiers 1-4 members, the guaranteed COLA is a legally protected benefit. But tracking the fund's financial health remains important, since underfunded pensions are occasionally subjects of reform pressure. Vested earned benefits are generally protected, and the COLA for existing members has not been changed by the Tier 5 reform.

No Social Security and WEP

Most Mississippi PERS members don't pay into Social Security for their public sector work. They contribute to PERS instead. For a career state employee or teacher, PERS is the primary retirement income from those working years. There's no Social Security buffer.

If you worked in Social Security-covered jobs before or after PERS service, the Windfall Elimination Provision previously reduced those benefits. WEP was repealed by the Social Security Fairness Act signed in January 2025. If WEP previously cut your Social Security, contact SSA to confirm your updated benefit amount.

The 3% COLA provides meaningful inflation protection, especially after age 60 when it compounds. Combined with no Social Security for most members, the COLA becomes the primary inflation hedge. For members who retire before 60 and receive only simple 3% increases, supplemental savings remain important during those early retirement years.

The 4-year FAS and how it compares

Mississippi's 4-year FAS window is shared by Kansas KPERS. States using 3-year windows (Alaska, Louisiana) generally produce higher FAS figures for employees whose salaries grew throughout their career. States using 5-year windows (Indiana TRF uses 5-of-last-10) capture more years and tend to produce lower averages.

Four consecutive years typically lands near the end of a career for most employees. For a teacher who received annual step increases plus occasional lane changes for education credits, the final 4 years are usually the 4 highest. The constraint is that they must be consecutive. If you took a year of unpaid leave or moved from full-time to part-time temporarily, those years might break the consecutiveness and push the optimal window back.