In service · Enrollment
Roth catch-up is a 2026 TSP rule. November is not the switch.
If you are 50 or older and over the earnings line, extra catch-up may have to go Roth. Change it on TSP.gov any pay period.
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Sign Up One Stop Shop · 2026-09-21
This is not open season
TSP contributions are not locked to November. You can change them any pay period. What did change for 2026: high-earning participants age 50 and older may have to put catch-up contributions into Roth instead of traditional. The official TSP briefing is the source of the rule. Your LES is the source of whether it hit.
The earnings line TSP cited is $150,000. Confirm the live number on TSP.gov before you argue with finance. BRS match still needs you to contribute enough in the first place. Catch-up is extra on top of that.
Do this on a second screen
TSP.gov. Login.gov. Look at traditional vs Roth. If you are 50+ and over the line, read the 2026 catch-up note before the next allotment. Then check the following LES. IPPS-A / myPay moves the money. TSP.gov is where you see it.
When you separate, do not cash TSP because a broker called the demob station. Roll or leave it with a plan.
How to sign up
01
Open TSP.gov
Login.gov. Same identity you should already have for milConnect.
02
Read the 2026 catch-up note
Age 50+ and over the published earnings line. Confirm on TSP.gov.
03
Check the next LES
The allotment is real or it is not. A portal screen is not the money.
Written from TSP.gov. Always confirm on the official page before you enroll.