Updated August 2, 2026. Quick answer: the TSP has no age-55 rule of its own — it has a separation rule that the tax code writes. If you leave federal service in or after the calendar year you turn 55, withdrawals from the TSP escape the 10% early-withdrawal penalty, whatever your age on the day you actually take the money. Separate at 54 and the penalty follows you until 59½, even if you wait.
What the rule actually turns on
The exception lives at IRC § 72(t)(2)(A)(v), which excuses a distribution “made to an employee after separation from service after attainment of age 55”. The TSP states the same thing from the other direction, and its version is the one worth memorising:
“If you are not age 55 or older in the year you separate, the IRS early withdrawal penalty will apply to most TSP withdrawals and all loan distributions received before age 59½.”
TSPFS29 (2/2025), Withdrawals and distributions from your TSP account
Two things follow, and both are the opposite of what people assume. The rule is decided by the year you separate, not the year you withdraw — so waiting does not fix a separation that happened too early. And it is decided by separation from this employer: it is not a birthday you reach, it is an event you either had or did not have.
If you are in a special category, the number is 50, not 55
Congress wrote a lower trigger for public-safety work. Under IRC § 72(t)(10)(A) the age-55 test is applied by substituting “age 50 or 25 years of service under the plan, whichever is earlier”. The categories named in the statute cover federal law enforcement officers, customs and border protection officers, federal firefighters, air traffic controllers, nuclear materials couriers, Capitol and Supreme Court Police, and diplomatic security agents, alongside state and local police, fire, EMS and corrections employees.
The 25-year half of that test is newer than the age half. The TSP’s own bulletin records it: “Section 329 of SECURE 2.0 extends this exception of the 10% early withdrawal penalty to public safety employees with at least 25 years of federal service in a TSP-eligible position at the time of separation.” A 48-year-old federal firefighter with 25 years in therefore qualifies on service alone.
What this does not cover
The exception is about the 10% penalty and nothing else. The money is still ordinary income in the year you take it if it comes from the traditional balance, and a large withdrawal in a single year can push you through a tax bracket and, later, an IRMAA threshold. Escaping a penalty is not the same as escaping the tax bill: which account to draw first is a separate question with a different answer.
The trap: rolling to an IRA gives this away
This is the part that costs people money, and it is not written anywhere on a TSP screen. The age-55 exception is a qualified-plan rule. It does not survive the trip to an IRA. The Code says so explicitly:
“Certain exceptions not to apply to individual retirement plans. Subparagraphs (A)(v) and (C) of paragraph (2) shall not apply to distributions from an individual retirement plan.”
26 U.S.C. § 72(t)(3)(A)
Subparagraph (A)(v) is the separation-after-55 exception itself. The IRS puts the same point in taxpayer-facing words on the form where you would claim it, describing exception 01 as covering “qualified retirement plan distributions (doesn’t apply to IRAs)”.
So a 56-year-old who separated at 56 can draw from the TSP without the 10% penalty — and, having rolled the same money to an IRA, cannot, until 59½. The balance did not change. The rulebook did. If there is any chance of needing the money before 59½, that is a reason to leave at least that much where it is, and it is independent of every other argument about fees or investments.
Worth saying plainly: the TSP does not warn you about this. We looked. Its withdrawal pages describe the age-55 exception, and separately describe rollovers, and never connect the two. The connection is in the statute and on the IRS form.
Related
The four ways to take money out of the TSP covers the mechanics once you are eligible, and keeping the TSP or rolling it to an IRA puts a price on the decision.
The statutory exception and the public-safety substitution from 26 U.S.C. §§ 72(t)(2)(A)(v) and 72(t)(10); the participant-facing statement from TSPFS29 (2/2025), Withdrawals and distributions from your TSP account; the 25-year extension from TSP Bulletin 23-3 (June 16, 2023), SECURE Act 2.0, Section 329. Read August 2026. General information, not tax advice.
If the pension is a federal one, the rulebook is its own: what the FERS annuity actually comes to (1% a year, 1.1% at 62 with 20 years, less five-twelfths of a percent for every full month under 62), and the separation choice that decides whether federal health insurance survives it.
Reaching the money early and committing it permanently are different decisions — the annuity closes for good on the day it is processed.