High-3 vs BRS: Which Military Retirement Is Better?

Understanding the trade-offs between Legacy High-3 and the Blended Retirement System

By MilMath Team · Updated June 2026

Your military retirement system shapes how much money you walk away with — whether you serve four years or thirty. Since the Blended Retirement System (BRS) took effect on January 1, 2018, every service member falls under one of two plans: the Legacy High-3 pension or BRS. If you joined on or after that date, you are automatically in BRS. If you joined earlier and were eligible, you had a one-time window to opt in or stay with High-3. That choice is now locked, but understanding how the two systems differ helps you plan contributions, time your separation, and avoid leaving money on the table.

This guide explains the mechanics of each plan, who tends to come out ahead, and how to think about the "breakeven" question instead of guessing. For your exact numbers, run them through our High-3 vs BRS Calculator.

How High-3 Works

The Legacy High-3 system is a pure defined-benefit pension. Your monthly retired pay is calculated as:

2.5% × Years of Service × Average of Your Highest 36 Months of Base Pay

The "high-3" refers to that 36-month average, which for most careers lands in your final three years when base pay is highest. The multiplier rewards longevity:

• 20 years of service produces 50% of your high-3 average.
• 30 years produces 75%.
• There is no government TSP match under this plan — the Thrift Savings Plan is available, but Uncle Sam contributes nothing.

The catch is the cliff. High-3 pays nothing in retirement benefits unless you reach 20 years. Leave at 19 years and 11 months and your pension is zero.

How BRS Works

BRS is a "blended" plan: a smaller guaranteed pension combined with a portable retirement account. The pension multiplier drops from 2.5% to 2.0%, so 20 years yields 40% of your high-3 average instead of 50%. In exchange, BRS adds three components:

• Automatic 1% contribution to your TSP after 60 days of service, whether or not you contribute anything yourself.
• Up to 4% matching on top of that. If you contribute 5% of your base pay, the government adds 1% automatic plus 4% match — a total of 5% from the government, or 10% going into your TSP.
• Continuation pay — a mid-career cash bonus, typically offered around 12 years of service, paid in exchange for a commitment to additional service.

The TSP money and (once vested) the matching belong to you even if you separate early. That portability is the single biggest reason BRS exists: roughly 80% of service members leave before 20 years and, under High-3, walked away with no retirement benefit at all.

The Core Trade-Off: Guaranteed Pension vs. Portable Savings

Boiled down, the decision is a trade between a larger guaranteed check for life (High-3) and a smaller guaranteed check plus an investment account you keep (BRS). High-3 hands you a 25% bigger pension multiplier. BRS hands you matching dollars and flexibility but a thinner pension.

Two factors tip the scale: how long you expect to serve, and whether you actually contribute enough to capture the full match. BRS matching only helps you if you put in your own 5%. A service member who contributes nothing to TSP still gets the 1% automatic contribution, but throws away the most valuable part of the plan.

Who Each System Tends to Favor

High-3 tends to win if you:

• Are confident you will reach and pass 20 years of service.
• Will not consistently contribute enough TSP to earn the full match.
• Value a larger guaranteed, inflation-adjusted pension over investment upside.

BRS tends to win if you:

• Might separate before 20 years — you still keep your vested TSP balance and match.
• Contribute at least 5% to TSP throughout your career to capture every matching dollar.
• Want continuation pay and more control over how your retirement money is invested.

The Lump-Sum Option

BRS adds one more lever at retirement: you may elect to take a portion of your pension as an upfront lump sum (a 25% or 50% election) in exchange for reduced monthly payments until you reach full Social Security retirement age, after which the pension reverts to the full amount. The lump sum is discounted using a government rate, which usually means you receive less total value than if you kept the full monthly pension. It can make sense for a specific, high-value need — paying off debt, funding a business — but for most retirees the full annuity is the stronger long-term choice. Treat the lump sum as a tool, not a default.

Thinking in Terms of Breakeven

Instead of asking "which is better," ask "at what point does one overtake the other for someone like me?" That breakeven depends on your years served, your high-3 base pay, your TSP contribution rate, your assumed investment return, and how long you live to draw the pension. Small changes in any of these shift the answer.

Example. Suppose two sergeants both retire at 20 years with a high-3 average base pay of, say, $5,000 per month (an illustrative figure — check current pay tables at DFAS.mil for real numbers). Under High-3, the monthly pension is 50% × $5,000 = $2,500. Under BRS, it is 40% × $5,000 = $2,000 — $500 less per month. But the BRS sergeant who contributed 5% for 20 years and captured the full match could accumulate a substantial TSP balance. Whether that balance and its future growth outweigh the $500/month gap depends on investment returns and how many years the pension is drawn. A service member who lives long and invested conservatively may find High-3 ahead; one who separated early, or invested well, may find BRS ahead. The point is that the answer is personal, not universal.

Because the variables interact, plug your own figures into the High-3 vs BRS Calculator rather than relying on rules of thumb.

Action Steps Regardless of Your System

• Contribute at least 5% to TSP. Under BRS this captures the full match — an immediate 100% return on that portion. Under High-3 there is no match, but TSP is still a low-cost retirement account.
• Know your vesting. BRS automatic 1% contributions vest after two years of service; your own contributions and the matching are yours immediately.
• Plan around continuation pay if you are under BRS and approaching the mid-career mark.
• Re-check the live figures every year. Pay tables, BAH, and the lump-sum discount rate change.

Frequently Asked Questions

Can I switch between High-3 and BRS now?
No. The opt-in window closed at the end of 2018. New members are automatically in BRS, and the choice for those who were eligible is permanent.

Does High-3 include any TSP match?
No. Under Legacy High-3 the government contributes nothing to your TSP. You can still contribute your own money; it simply is not matched. See TSP.gov for contribution rules.

If I'm under BRS and leave at 10 years, do I get anything?
You get no pension (a pension still requires 20 years), but you keep your vested TSP balance, including the government match — money a High-3 member would not have received at all.

Is the BRS lump sum a good deal?
Usually not in pure dollar terms, because it is discounted. It can help with a specific need, but most retirees keep the full monthly annuity. Run the numbers before electing it.

Use Our Calculator

Our High-3 vs BRS Calculator lets you enter your rank, years of service, and TSP contribution rate to estimate which system pays more over your lifetime.

Educational information only — not official guidance. Retirement rules, pay tables, and rates change. Verify your specific situation with DFAS.mil, TSP.gov, and your finance office before making decisions.