Updated September 3, 2026. Quick answer: Minnesota Public Employees Retirement Association (PERA), Coordinated Plan: the COLA is automatic and set by statutory formula, and it compounds, service credit can be purchased, and no DROP was found. Vesting takes three years (36 months) of service.
Provisional. This page is published at medium confidence. The specific points that could not be confirmed are listed under What could not be verified below, and are named rather than smoothed over.
The verdicts
| Is the COLA granted? | Automatic (statutory formula) |
|---|---|
| Is the COLA compounded? | Compounded |
| Vesting | 3 years (36 months) of service |
| Buy service credit? | Yes |
| DROP? | None found |
| State | Minnesota |
Those first two rows are separate questions and are routinely confused. Whether you get an increase at all is one thing; whether it compounds is another. A system can grant an increase automatically every year and still compute it against your original benefit forever, which is a materially worse deal than it sounds.
The COLA
“Annual increases for monthly benefits are determined by Minnesota Statutes.” “After your first increase, all future increases will be the full amount per statute.”: a compounding annual adjustment, not a fixed-base one. Effective January 1, 2026 the Coordinated Plan formula changed to 100% of the Social Security COLA (minimum 1.00%, maximum 1.75%), up from 50% of the SSA CPI figure (minimum 1%, maximum 1.5%) previously.
Buying service credit
PERA members can repay a prior refund, buy back authorized/workers’-comp/military/strike leave, and purchase prior military service. Refund repayment costs “the amount of your original refund plus interest.” Leave buyback costs “Generally, the amount of your missing employee and employer contributions during the leave period, plus interest.” Military service purchase is priced differently: “the actuarial present value of the increase to your future monthly benefit due to the service purchase.” The applicable interest rate has stepped down over time and is currently 7.0% (from 7/2023).
Run your own numbers before deciding: some purchases never recover their cost, and the calculator shows which.
Coordinate this with your overall retirement plan
An adviser can help weigh a COLA that may not compound, a service-credit purchase that may never pay for itself, or a DROP election against the rest of your retirement plan, but that does not replace the numbers in your own member statement.
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Vesting
PERA describes vesting conceptually as earning enough service credit to receive a lifetime monthly benefit after leaving public service and reaching a retirement-eligible age, with one service credit earned per month of contribution, but the specific number of years or months required to vest was not stated in the PERA benefit-basics materials reviewed for this system. PERA’s separate Police & Fire and Correctional plans vest on a graded schedule instead: 50% at 5 years, rising 10 points per year to 100% at 10 years.
DROP
No DROP program appears in PERA’s member pages. The only mention found was in 2024 board-meeting minutes discussing DROP as a hypothetical policy concept, not an active PERA benefit.
DROP is rarer than it appears across the systems on this site: most have none.
What could not be verified
REFUND TERMS: this page does not state what happens to your contributions if you take a refund instead of leaving your account with the system: that comparison was not independently researched for this system this session, and is left as an open gap rather than guessed from another system’s rule. Consult your own plan’s refund/forfeiture terms before deciding. Any additional field marked “not stated” in the verdicts table above was genuinely absent from the official materials read, not omitted for space.
Sources
Read September 3, 2026.
Related public pension systems: Minnesota TRA · Missouri PSRS.
General information drawn from each system’s own official published materials, not legal, tax or financial advice. Vesting, COLA and buyback rules are set by state statute and plan tier, differ materially by hire date, and can change by future legislation. This page cannot see your own member statement, which governs. We are not a law firm, a tax adviser, or a fiduciary, and this is not personalized advice.