BRS vs. Legacy: Which System Actually Wins
The answer depends on one question you should answer honestly
The Blended Retirement System (BRS) and the legacy High-3 system differ in one fundamental way: legacy is all-or-nothing, and BRS is portable.
Under legacy, you get 2.5% of your high-3 base pay per year of service, starting at 20 years. That's 50% at 20, 62.5% at 25, and 75% max at 30. Separate at 19 years and 364 days? You get absolutely nothing.
Under BRS, the pension multiplier drops to 2.0% — so 40% at 20 years instead of 50%. But you get TSP matching: the government automatically contributes 1% of your base pay and matches your contributions up to 5%. That TSP balance is yours whether you serve 4 years or 40.
The honest question: are you going to serve 20 years?
The answer depends on one question you should answer honestly
If you're confident about 20, legacy pays more. An E-7 retiring at 20 gets approximately $600 more per month under legacy than BRS. Over a 30-year retirement, that's roughly $216,000 more in pension payments.
But here's the data most people ignore: roughly 81% of service members separate before 20 years. For those 81%, BRS is unambiguously better. A service member who contributes 5% for 10 years under BRS walks away with a TSP balance that can grow to $400,000+ by age 60. Under legacy, that same person walks away with zero.
BRS also includes continuation pay — a one-time bonus at the 12-year mark (typically 2.5x–13x monthly base pay) in exchange for committing to 4 more years. This isn't modeled in most calculators but meaningfully changes the BRS value proposition.
The honest advice: most people overestimate their likelihood of reaching 20. If there's any meaningful probability you leave before 20 — force shaping, family needs, career opportunity, medical separation — BRS wins decisively.