The BRS TSP Match Hack: Why Most Junior Soldiers Are Leaving Free Money on the Table Every Month
Here’s a number: $113.47.
That’s the government match an E-3 with less than two years forfeits every single month by contributing 0% to their TSP. Not because the money isn’t there. Not because they’re ineligible. Because nobody explained it when they signed.
That gap compounds. Over a 20-year career, skipping the full match at E-3 pay doesn’t cost you $113. It costs you tens of thousands in lost contributions alone — before a single dollar earns anything.
What the Blended Retirement System actually is
If you joined on or after January 1, 2018, you’re in the Blended Retirement System, BRS. It replaced the old all-or-nothing setup: serve 20 years, collect a pension; leave before 20, walk out with nothing from the military. Under the old system, about 81% of service members left with zero retirement benefit.
BRS changed that. You still get a pension at 20 years — calculated at 2% per year of service, times your average highest 36 months of base pay. The legacy High-3 system used 2.5% per year, so yes, the pension is smaller under BRS. The trade-off is the TSP matching you keep even if you serve four years and get out.
BRS has three pieces:
- TSP with government matching — this is the one most people are botching
- Continuation pay, a one-time cash bonus around the 8–12 year mark
- A monthly pension if you retire after 20 or more years
The matching formula
The TSP is the military’s version of a 401(k). Under BRS, the government puts money into your account two ways.
Automatic 1%. After 60 days of service, DoD deposits 1% of your base pay into your TSP every pay period. You don’t touch anything. It just goes in. It vests — meaning it’s permanently yours — after two years of service.
Matching contributions. Once you’ve hit two years, the government matches what you put in. Matching contributions vest immediately — the money is yours from day one of matching. Here’s how it works:
| You contribute | Gov’t matches | Total going in |
|---|---|---|
| 0% | 0% | 1% (auto only) |
| 1% | 1% | 3% |
| 2% | 2% | 5% |
| 3% | 3% | 7% |
| 4% | 3.5% | 8.5% |
| 5% | 4% | 10% |
| More than 5% | 4% | Your % + 5% |
The number to hit is 5%. You put in 5%, DoD adds 4%, plus the automatic 1% — 10% of your base pay going toward retirement every month. Contributing above 5% doesn’t increase the match. The ceiling is 4%.
At 3%, you get 3% matching. That missing two percent is real money leaving your pocket every pay period.
The automatic enrollment trap
When you came in, you were automatically enrolled in TSP. If you joined after October 1, 2020, your default rate was set at 5% — enough to capture the full match. Good.
But anyone who joined before that date was defaulted at 3%, and anyone who never changed it is still sitting at 3%. And anyone who opted out of TSP entirely after enrollment is at 0%.
Two groups are leaving match money on the table right now: people contributing less than 5%, and people who opted out.
The fix takes two minutes. Log into myPay at mypay.dfas.mil, find TSP, and set your contribution to 5%.
What 5% actually costs — and what you get back
An E-3 with under two years earns $2,836.85 per month on 2026 pay tables.
- 5% out of your check: $141.84/month
- Government match (4%): $113.47/month into your account
- Government auto 1%: $28.37/month into your account
- Total landing in your TSP: $283.68/month
You put in $141.84. The government puts in $141.84. Before a single cent earns a return, you’ve already doubled the contribution.
Now look at what 3% costs you. At 3%, DoD matches 3%. You’re contributing $85.11/month and getting $85.11 matched. Total: $198.58/month going in, plus the $28.37 auto deposit. That’s $226.95.
The difference between 3% and 5% is $56.73/month out of your paycheck — but it costs you $56.73/month in lost match too. The real gap in monthly TSP deposits is $56.73, funded entirely by DoD. You’re not contributing that — you’re just not claiming it.
An E-5 over two years earns $3,598.23/month. At 5%, DoD adds $143.93 to their account every month. At 3%, they leave $71.97 on the table every month. Over a full year, that’s $863 in free match gone.
Traditional vs. Roth: pick Roth while you’re junior enlisted
When you set your contribution, you choose Traditional or Roth. Here’s what that means.
Traditional: Pre-tax. Your paycheck is slightly bigger now because taxes come out later — when you withdraw in retirement.
Roth: After-tax. You pay taxes now, on a lower income, and the money grows tax-free. No taxes when you pull it out in retirement. Not on contributions, not on the growth.
For E-1 through E-5, Roth almost always wins. You’re at one of the lowest tax brackets you’ll ever be in. Paying tax now, while your income is modest, locks in decades of completely tax-free growth. By the time you’re 60 with a six-figure balance, those tax-free withdrawals are worth far more than the deduction you’d get by going Traditional today.
One thing to know: the government match always goes into the Traditional side, regardless of what you elect. That’s fine — just put your own contributions into Roth.
Fund selection: start simple
By default, your money goes into a Lifecycle Fund (L Fund) matched to your expected retirement year. L Funds automatically shift from aggressive stock allocations toward more conservative bond-heavy allocations as you get closer to retirement. If you’re 20 and don’t want to think about this, an L2065 or L2070 is a reasonable starting point.
The C Fund tracks the S&P 500 — the 500 largest U.S. companies. Over long periods, it has averaged around 10% annually. For someone in their early 20s with 40 years before they need the money, a heavier C Fund allocation is worth learning about.
Get your contribution rate right first. Fund selection is a separate conversation.
Continuation pay: the mid-career bonus
Between 8 and 12 years of service, BRS members can receive a one-time continuation pay bonus in exchange for committing to at least three more years. For active duty, the amount is typically 2.5 times your monthly basic pay — though the exact rate depends on your branch, component, and specialty, and can be higher for high-demand jobs. Guard members in drilling status receive less.
Note: In 2026, the Army changed the eligibility window to open at 7 years of service rather than 8 — so Army BRS members are now eligible from 7 to 12 years. Check with your unit or finance office for current rates and your specific window.
If you’re in your first term, you don’t need to do anything about this yet. Just know it exists. When the offer comes, consider routing a chunk of it into TSP.
What $200/month at 20 becomes at 60
Compound growth means your earnings earn earnings. The longer it runs, the harder it works.
An E-3 contributing 5% puts in about $141/month. DoD adds another $141. That’s roughly $283/month total. Round it to $200 for a clean example.
$200/month, starting at 20, at 7% average annual return: approximately $520,000 by age 60.
Start at 30 instead — same $200/month, same return: approximately $243,000. The 10-year delay costs $277,000. Not because you contributed less. Because you lost a decade of compounding.
The math doesn’t care about your intentions. Start early and it multiplies. Wait and it’s just math that never worked in your favor.
How to fix it in five minutes
- Go to myPay at mypay.dfas.mil and log in
- Under “Thrift Savings Plan,” select “Start, Stop, or Change Contributions”
- Set your contribution to 5% of basic pay
- Choose Roth if you’re E-1 through E-5
- Submit and confirm
That’s it. Two minutes. Done.
If you’re approaching the $24,500 annual contribution limit for 2026 (up from $23,500 in 2025), or dealing with combat zone contributions, talk to your unit’s financial readiness officer or call Military OneSource at 800-342-9647. The counseling is free.
Matching starts after two years of service. If you haven’t hit that mark yet, contribute anyway. The automatic 1% is already going in, and you want the habit set before matching starts. There’s no advantage to waiting.
The short version:
- BRS covers everyone who joined on or after January 1, 2018
- DoD deposits 1% of base pay automatically after 60 days — vests at two years, no action needed
- DoD matches up to 4%, but only if you contribute 5%; matching starts after two years and vests immediately
- Anyone still at the old 3% default is leaving over $56/month in free match behind every pay period
- Fix it: log into myPay, set TSP to 5%, choose Roth while you’re junior enlisted — takes two minutes
Last verified: April 2026. TSP contribution limit ($24,500) from tsp.gov and IRS. BRS matching formula from militaryonesource.mil. Continuation pay 2026 changes from myarmybenefits.us.army.mil. Pay figures from 2026 DFAS enlisted pay tables. This is not official financial advice. For personalized guidance, contact a Military OneSource financial counselor at no cost.