Military TSP Contribution Limits 2026 Explained

2026 TSP Contribution Limits at a Glance

Military TSP has gotten complicated with all the conflicting advice flying around. So let me cut straight to what actually matters: three numbers. The IRS elective deferral limit sits at $24,500 for 2026 — that’s the money coming directly out of your paycheck. Hit 50 or older? You get an extra $8,500 catch-up contribution, pushing your elective deferral ceiling to $33,000. Then there’s the annual additions limit, which wraps together your contributions and employer matching at a combined max of $70,000.

Here’s the quick reference table:

Both the elective deferral and catch-up limits climbed from 2025 — $1,000 and $500 respectively. The IRS indexes these annually for inflation. Annual additions limit went up $2,000. Still on an active contract? These increases directly affect how much of that twice-monthly paycheck you can stash away before December 31st.

How BRS Matching Changes the Math

Here’s where military TSP gets genuinely different from the generic federal employee advice you’ll find everywhere else. Joined after January 1, 2018? You’re under the Blended Retirement System. DoD automatically drops 1% of your base pay into your TSP — whether you contribute anything or not. Contribute up to 4% of base pay yourself, and DoD matches it dollar-for-dollar. Put in 5%, they still only match 4%. Free money, full stop. But most servicemembers I’ve talked to don’t understand how that matching interacts with the limits.

Here’s the detail that actually matters: employer matching does NOT count against your $24,500 elective deferral limit. It does count against the $70,000 annual additions limit. That distinction is more important than it sounds.

Walk through a real example with me. An E-5 with four years of service pulls roughly $3,100 in monthly base pay — $1,550 per paycheck, paid twice monthly. Contributing 5% of base pay looks like this:

• Monthly base: $3,100
• 5% contribution: $155 per paycheck
• DoD automatic 1%: $31 per paycheck
• DoD match on 4% of the 5% contributed: $62 per paycheck
• Total going into TSP per paycheck: $248

Across 24 paychecks, that E-5 puts in $3,720 in elective deferrals and receives $2,232 in employer contributions. Combined: $5,952 annually. Nowhere near the limits at that rank. The math shifts fast after a promotion or two — especially when someone tries to max out.

Combat Zone and Tax-Exempt Contributions

Probably should have opened with this section, honestly. Deployed to a designated combat zone — Iraq, Afghanistan, Syria, and others on the IRS list — your base pay goes tax-exempt. That alone is significant. But the TSP angle is where it gets really useful, and most people miss it entirely.

Frustrated by the usual contribution ceiling, many deployed servicemembers don’t realize they can funnel tax-exempt combat pay directly into TSP using a separate election in MyPay. Those contributions sit outside your normal elective deferrals. The standard $24,500 cap? It doesn’t swallow these up the same way. You’re working toward the $70,000 annual additions ceiling instead, which opens up considerably more room.

Here’s a concrete example. An E-6 deployed to a combat zone receiving $2,000 in tax-exempt pay monthly — that’s $24,000 annually in additional TSP-eligible funds. You set this up in MyPay before deployment or during mobilization. The tax-exempt election is separate from your regular percentage-based contribution. It’s one of the only situations where an enlisted servicemember can realistically approach the $70,000 annual additions limit. That’s what makes this particular rule endearing to us military folks who actually read the fine print.

The catch is simple: you have to actively elect it. Nobody does it for you. Skip MyPay, and that money hits your regular paycheck — taxed like everything else. No auto-enrollment here.

How to Calculate Your Max Contribution Per Paycheck

Military pay lands on the 1st and 15th. That’s 24 paychecks annually — not 26, which trips up anyone used to civilian bi-weekly schedules. Divide $24,500 by 24 and you land at $1,020.83 per paycheck in elective deferrals. Age 50 or older? Add $8,500 divided by 24, which is $354.17, and your per-paycheck max reaches $1,375.

Here’s the step-by-step — at least if you want to hit the ceiling without overthinking it:

1. Open MyPay and navigate to the TSP contribution section.
2. Choose either a percentage of base pay or a flat dollar amount per paycheck.
3. Most servicemembers use percentage — it adjusts automatically when pay changes.
4. Calculate your target: divide your target annual contribution by annual base pay, multiply by 100.
5. Enter that percentage and let it run through year-end.

Example: an E-4 targeting $24,500 with roughly $32,000 in annual base pay. Divide $24,500 by $32,000, multiply by 100 — you’re looking at approximately 77% of base pay. Set it in MyPay and the math handles itself by December.

One warning worth flagging. Hit the annual limit mid-year, and TSP plus your military finance office will automatically stop contributions. Your BRS matching stops with it. Get promoted in June, watch your 5% contribution breach the annual additions limit by August, and you’ve effectively donated three months of matching to nowhere. Recalculate after every promotion. Don’t make my mistake.

Common TSP Contribution Mistakes to Avoid

• Contributing less than 5% and leaving BRS match sitting on the table. Even if maxing out isn’t realistic right now, 4% captures the full 4% DoD match — that’s an instant 100% return on those dollars. Fix: open MyPay today and set it to at least 4% of base pay.
• Not updating contributions after promotion. Paycheck went up, contribution stayed flat — you’re now quietly under-saving without realizing it. Fix: use percentage rather than flat dollar amounts, so every raise automatically pulls more in.
• Missing the combat zone election during deployment. I’m apparently the type who learned this lesson late, and MyPay’s combat contribution option works for people who find it while missing entirely those who don’t. Fix: contact your S-1 or finance office within 60 days of deployment — retroactive elections are sometimes possible.
• Re-enlisting or transferring between service components without re-checking TSP enrollment. A break in service or a move to the Guard can silently reset contribution settings to zero. Fix: log into MyPay within a week of any status change and confirm TSP contributions are still active.
• Maxing the $24,500 elective limit without accounting for the $70,000 annual additions ceiling. Senior enlisted and officers with substantial base pay plus BRS matching can bump against that ceiling before they expect it. Fix: work backward from $70,000, subtract your projected employer match, and set elective deferrals accordingly.

TSP contributions operate on a tier system — elective deferrals, employer matching, and tax-exempt combat contributions each interact differently with the limits. Most servicemembers treat TSP like a standard 401(k) and walk away from real advantages. You’ve got the numbers now. So, without further ado, go open MyPay and check where your contributions actually stand.