How military retired pay is calculated: High-3, BRS, REDUX & Final Pay
Military retired pay looks complicated, but it comes down to one line: a multiplier, times your years of service, times a basic-pay figure. What changes everything is which system you’re in — and that was decided the day you entered service, not by any choice you make at retirement. A 20-year career pays 50% of your High-3 under the legacy system but only 40% under the newer Blended Retirement System, a gap the TSP match is designed to fill. This guide breaks down all four systems, the 20-year cliff that makes year 20 worth so much more than year 19, and how COLA treats each — with a calculator to estimate your own pension.
1. Which system are you in?
You don’t pick your retirement system — it’s locked by your DIEMS (Date of Initial Entry into Military Service). Find your entry date and the rest follows:
| If you entered service… | Your system | Multiplier |
|---|---|---|
| Before Sep 8, 1980 | Final Pay | 2.5% / yr |
| Sep 8, 1980 – Dec 31, 2017 (no REDUX) | High-3 | 2.5% / yr |
| Aug 1, 1986 – Dec 31, 2017 & took the bonus | REDUX | 2.0% / yr (reduced) |
| Jan 1, 2018 or later (or opted in) | BRS | 2.0% / yr + TSP |
The universal shape of the formula is the same across all of them:
2. Final Pay
The oldest and most generous system, now mostly historical. 2.5% per year of service, applied to your final month of basic pay. Twenty years = 50% of that final paycheck; forty years = 100%. Because it uses your single highest (final) pay rather than an average, it pays slightly more than High-3 for someone promoted late in their career. Anyone still serving under Final Pay is well into a 45-plus-year career.
3. High-3 (the common one)
The default for anyone who entered between September 1980 and the end of 2017. Same 2.5% multiplier, but the base is the average of your highest 36 months of basic pay (usually your last three years, at your highest rank and longevity) — which is why it’s also called “High-36.”
So 20 years = 50%, 24 years = 60%, 30 years = 75%, 40 years = 100%. A 2007 law repealed the old 75% cap, so longer careers keep climbing toward 100%. For a steady-in-grade retiree, High-3 and Final Pay land in nearly the same place; for a late promotion, High-3 is modestly lower. See the full legacy vs BRS comparison.
4. REDUX / CSB
REDUX was a one-time choice offered to those who entered after August 1986: take a $30,000 Career Status Bonus at the 15-year mark in exchange for a reduced pension. The multiplier is cut by 1 percentage point for every year under 30 — so 20 years pays 40% (not 50%), 24 years pays 54%, and only at 30 years does it catch back up to 75%.
On top of the smaller multiplier, REDUX receives CPI minus 1% each year until age 62, when a one-time recomputation resets the multiplier to the High-3 figure and restores full COLA. Over a long retirement the reduced COLA compounds badly — which is why the vast majority of eligible members declined the bonus and stayed on High-3.
5. BRS (2018 and later)
The Blended Retirement System covers everyone who entered on or after January 1, 2018 (and those who opted in during the 2018 window). It “blends” a smaller pension with a 401(k)-style savings match:
- Reduced pension: 2.0% per year × High-3 average. A 20-year retiree gets 40% instead of 50% — a 20% cut to the defined benefit.
- TSP match: an automatic 1% of basic pay plus matching up to 4% more (5% total) into your Thrift Savings Plan.
- Continuation pay: a mid-career bonus around year 12 for additional obligated service.
- Lump-sum option: the choice to take 25% or 50% of the pension as a discounted lump sum at retirement.
The trade is real: a smaller guaranteed pension, but portable savings you keep even if you leave before 20 — and for disciplined savers who capture the full match for a career, the total package can match or beat legacy High-3.
6. Estimate your retired pay
Pick your system, your years of service, and your basic-pay base (final basic pay for Final Pay; the average of your highest 36 months for the others). The calculator applies the right multiplier — including the REDUX reduction — and caps it at 100%.
Military retired pay estimator
Defined-benefit pension only. BRS TSP match is separate and not included here. Estimate only — verify with DFAS/myPay.
7. The 20-year cliff
Active-duty retirement is cliff-vested at 20 years. Under the legacy systems, separate at 19 years and 11 months and your pension is zero — there is no partial, prorated benefit. That cliff is why so many members push through difficult final years to reach 20: the financial jump from year 19 to year 20 is, in effect, infinite.
Under BRS you keep your TSP contributions and government match even if you leave before 20. That portability is the system’s quiet advantage — it rewards the majority of service members who don’t stay 20 years. The only sub-20 pension path under any system is a medical retirement under Chapter 61, which has no minimum service.
8. Reserve/Guard & COLA
Reserve and Guard retirement runs on a different track: a points-based system, generally payable at age 60 (earlier with qualifying active-duty time after January 2008). Points convert to equivalent years — total points ÷ 360 — and that figure plugs into the same multiplier formula against your High-3 at 60.
On COLA: Final Pay, High-3, and BRS all get the full CPI adjustment annually (2.8% for 2026). REDUX alone gets CPI−1% until the age-62 reset. After you retire, your pension also interacts with VA disability through CRDP and CRSC, and with SBP for survivors — both worth understanding before you finalize your retirement paperwork.
9. Frequently asked questions
How is military retired pay calculated?
For most retirees, monthly retired pay equals a multiplier times your years of service times your basic pay base. Under the High-3 system, the multiplier is 2.5 percent per year of service and the base is the average of your highest 36 months of basic pay, so 20 years yields 50 percent of that average. Under the Blended Retirement System, the multiplier drops to 2.0 percent per year, so 20 years yields 40 percent, but BRS adds Thrift Savings Plan matching. The oldest Final Pay system also uses 2.5 percent per year but applies it to your final basic pay rather than a 36-month average. Which system you fall under is fixed by your date of initial entry into service.
Which retirement system am I under?
Your system is set by your DIEMS, the Date of Initial Entry into Military Service, and you don't get to choose. If you entered before September 8, 1980, you are under Final Pay. If you entered between September 8, 1980 and December 31, 2017 and did not take the REDUX bonus, you are under High-3. If you entered between August 1, 1986 and December 31, 2017 and accepted the 30,000 dollar Career Status Bonus at 15 years, you are under REDUX. Everyone who entered on or after January 1, 2018, plus those who opted in during the 2018 window, is under the Blended Retirement System.
What is the difference between High-3 and BRS?
The core difference is the pension multiplier and the addition of a savings component. High-3 uses a 2.5 percent multiplier, giving a 20-year retiree 50 percent of their highest-36-month average basic pay as a lifelong pension. BRS cuts that multiplier to 2.0 percent, so a 20-year retiree gets 40 percent, a 20 percent reduction in the defined-benefit pension. In exchange, BRS adds automatic and matching Thrift Savings Plan contributions of up to 5 percent of basic pay, mid-career continuation pay, and a lump-sum option at retirement. For disciplined savers who capture the full TSP match for a full career, the total BRS package can rival or exceed High-3.
Do I need 20 years to get military retired pay?
For a regular active-duty pension, yes. Active-duty retirement requires at least 20 years of qualifying service, and it is a cliff: leave at 19 years and you receive no pension under the legacy systems. Under BRS you would still keep your Thrift Savings Plan balance and any matching even if you separate before 20, which is one of its advantages. The only path to a pension with fewer than 20 years is a medical or disability retirement under Chapter 61, which has no minimum service requirement. Reserve and Guard members reach a pension through a separate 20-good-year, points-based system payable at age 60.
Does military retired pay get a COLA?
Yes. Military retired pay receives an annual cost-of-living adjustment tied to the Consumer Price Index, and for 2026 that adjustment was 2.8 percent. Final Pay, High-3, and BRS all receive the full CPI increase. REDUX is the exception: it receives CPI minus one percentage point each year until age 62, when a one-time recomputation resets the pension to what it would have been under High-3 and restores full COLAs going forward. Over a long retirement, even a one-point COLA difference compounds into a substantial gap, which is a major reason most eligible members declined the REDUX bonus.