High-3 vs. the Blended Retirement System: Projecting Your Military Pension

A military pension is one of the most valuable benefits of a career in uniform, and one of the least understood while you are still serving. Part of the reason is that the retirement number sits so far in the future that it feels abstract. Part of it is that there are two different systems, and which one you fall under changes both the pension formula and how much of your retirement you are responsible for building yourself. Getting a realistic estimate early is what turns “someday” into something you can actually plan for.

The problem: the number feels invisible until it is too late

Most service members do not seriously look at their retirement figure until they are within a few years of the finish line. By then, the decisions that most affect the outcome, like how long to serve and how much to contribute to a retirement account, are largely behind them. A pension you cannot see is a pension you cannot plan around, and the cost of that blind spot is measured in years of contributions and missed matching.

High-3: the legacy pension formula

Under the High-3 system, your pension is based on the average of your highest 36 consecutive months of base pay, typically your last three years of service. That average is multiplied by a percentage that grows with each year served. The longer you serve, the larger the multiplier and the larger the base-pay average, so both length of service and rank at retirement push the number up. High-3 is a defined-benefit pension: as long as you reach retirement eligibility, the government pays a set monthly amount for life, with no investment account required on your part.

The Blended Retirement System

The Blended Retirement System, or BRS, does what its name suggests: it blends a smaller defined-benefit pension with a defined-contribution component through the Thrift Savings Plan. The pension multiplier under BRS is lower than under High-3, but in exchange the government contributes to your TSP and matches a portion of your own contributions. The trade is deliberate. BRS gives up some guaranteed pension in return for a portable retirement account that has value even if you separate before reaching 20 years, which the legacy pension does not.

The practical upshot is that under BRS your own contribution behavior matters enormously. Leaving matching on the table is leaving part of your compensation unclaimed.

Which one applies to you

Which system you fall under depends primarily on when you entered service, with a window during which some members were able to opt in to BRS. Because the two systems produce different pensions and place different weight on your own savings, the first step in any real retirement plan is knowing which one governs your career, and then estimating the pension it will actually produce given your service length and rank.

Who this is for

This matters for anyone planning to serve long enough to retire, but it is most useful earlier than people expect. A service member deciding whether to stay past a reenlistment point, someone weighing the value of a promotion in their final years, and anyone under BRS trying to decide how much to contribute all benefit from seeing the pension number in concrete terms rather than treating it as a distant abstraction.

How the app helps

The Military Retirement Pay Calculator projects your pension under both the High-3 and the Blended Retirement System, so you can see your estimated retirement number long before you get there. By putting a real figure on the outcome, it makes the trade-offs visible: how another few years of service changes the pension, or how retiring at a different rank moves the result. That visibility is exactly what lets you make retention and savings decisions on purpose instead of by default.

For a fuller picture, pair it with the US Military Pay Calculator to understand the base pay that drives the pension in the first place.

See the full details on the Military Retirement Pay Calculator page.

This article is general information, not financial advice. Confirm your retirement system, eligibility, and figures with your finance office and the Defense Finance and Accounting Service (DFAS).