You can transfer a TSP to a 401k once you’ve separated from federal service, or once you’ve reached age 59½ while still employed by the government. The move is structured as a rollover, and choosing a direct rollover keeps the money out of your hands and out of reach of the mandatory 20% tax withholding. A few conditions have to be cleared first: any outstanding TSP loan resolved, spousal consent handled if your retirement system requires it, and your new plan confirmed as willing to accept the incoming funds.
When You’re Eligible to Move the Money
Your employment status controls the door. Separated employees and retirees have the right to withdraw the full TSP balance, and that balance can be sent directly to a 401k at a new employer.1Office of the Law Revision Counsel. 5 USC 8433 – Benefits and Election of Benefits This is the typical path: leave federal service, then roll over.
Still working for the government? Your options narrow. After you turn 59½, you can request an age-based in-service withdrawal and roll it into a 401k.1Office of the Law Revision Counsel. 5 USC 8433 – Benefits and Election of Benefits A financial hardship withdrawal is available before that age, but hardship distributions generally cannot be rolled over.2eCFR. 5 CFR 1600.31 – Methods for Rolling Over Eligible Rollover Distribution to the TSP
What Can and Can’t Move
Traditional TSP balances go to a traditional 401k, keeping tax-deferred status. Roth TSP money can only be rolled into a Roth account inside an eligible employer plan or into a Roth IRA; it cannot land in a traditional 401k.3Thrift Savings Plan. Rollovers From the Thrift Savings Plan to Eligible Retirement Plans If your account holds both, the TSP distributes them proportionally and processes each portion separately.
Some distributions are never eligible for rollover, no matter where you try to send them:
- Required minimum distributions. Once RMDs apply, that year’s required amount has to come out as income.2eCFR. 5 CFR 1600.31 – Methods for Rolling Over Eligible Rollover Distribution to the TSP
- Hardship withdrawals.
- Substantially equal periodic payments based on life expectancy or set to run ten or more years.
Uniformed service members who contributed tax-exempt combat-zone pay have an extra wrinkle. Distributions come out proportionally from taxable and nontaxable amounts, and if your new 401k doesn’t accept tax-exempt balances, the TSP pays that portion directly to you rather than sending it along.3Thrift Savings Plan. Rollovers From the Thrift Savings Plan to Eligible Retirement Plans Ask the receiving plan about this before you file the request.
Clear Any Outstanding TSP Loan First
An unpaid TSP loan blocks the whole transaction. You cannot request a withdrawal or rollover while a loan is outstanding, and the online system won’t even let you start.4Federal Retirement Thrift Investment Board. Withdrawing Your TSP Account After Leaving Federal Service
You have two ways out. Repay the loan in full, or let the TSP declare the remaining balance a taxable distribution. After your agency reports your separation, the TSP gives you a short window to repay; miss it, and the unpaid balance becomes a distribution, triggering income taxes and, if you’re under 59½, a 10% early withdrawal penalty.5Thrift Savings Plan. Changes to Tax Rules About TSP Payments The loan amount itself can’t be rolled over.3Thrift Savings Plan. Rollovers From the Thrift Savings Plan to Eligible Retirement Plans Pay it off before you leave if you can.
Spousal Consent
Whether your spouse has to sign depends on which retirement system covers you. Under FERS or as a uniformed services member, your spouse must give written, notarized consent before the TSP will process the distribution feeding your rollover. A total withdrawal from an account over $3,500 requires your spouse to waive the joint-life survivor annuity. A partial withdrawal requires consent regardless of the balance.6Thrift Savings Plan (TSP). Taking Money From Your Account
Under CSRS, the requirement is lighter: the TSP notifies your spouse in writing about your election, but consent isn’t required.7eCFR. 5 CFR Part 1650, Subpart G – Spousal Rights In either system, exceptions exist if your spouse can’t be located, and FERS participants can also request an exception for exceptional circumstances such as having lived separately with no financial relationship for three or more years.
Notarization is cheap but takes scheduling. Build it into your timeline instead of discovering the requirement after you’ve filed.
Use a Direct Rollover, Not an Indirect One
The choice between a direct and indirect rollover changes how much money actually arrives in the 401k.
A direct rollover sends the money straight from the TSP to your new plan’s custodian. Nothing is withheld. You don’t touch the funds. This is what almost everyone should choose.
An indirect rollover sends the distribution to you personally, and federal law requires the TSP to withhold 20% of the taxable portion first.8Office of the Law Revision Counsel. 26 USC 3405 – Special Rules for Pensions, Annuities You then have 60 days to deposit the full original amount into the new 401k.9Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions The math is unforgiving. On a $100,000 distribution, the check that reaches you is $80,000, but you have to deposit $100,000 into the 401k inside 60 days, which means fronting $20,000 out of pocket to replace what was withheld. You get the withholding back at tax time, but the cash flow squeeze is real. Miss any part of the 60-day window and whatever you didn’t roll becomes taxable income, plus a 10% penalty if you’re under 59½.5Thrift Savings Plan. Changes to Tax Rules About TSP Payments
How to Submit the Request
Before logging into the TSP, take care of two things. Confirm with your new 401k administrator that the plan accepts incoming rollovers. No plan is required to.9Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions Then collect the receiving plan’s exact legal name, mailing address, and your new account number.
Withdrawal and rollover requests run through the My Account portal at tsp.gov. Paper forms are no longer required for most transactions.10Thrift Savings Plan (TSP). Forms and Resources After logging in, the system walks you through selecting a withdrawal type, entering the receiving plan’s information, and designating the transfer as a direct rollover to an eligible employer plan. That designation is what routes the money straight from the TSP to the new custodian without it ever landing in your bank account, and it’s what avoids the 20% withholding.11Legal Information Institute. 26 USC 401a31 – Direct Transfer of Eligible Rollover Distributions In some cases, such as when spousal consent documentation is needed, the TSP will require you to print and mail a signed form.
The TSP disburses withdrawal payments each business day.6Thrift Savings Plan (TSP). Taking Money From Your Account Once the distribution is processed, confirm with the new 401k administrator that the funds arrived and were credited correctly. Rollovers occasionally hang up at the receiving end.
Should You Roll Over at All?
You don’t have to move the money. If your account balance is $200 or more, you can leave it in the TSP indefinitely after separating.12Thrift Savings Plan (TSP). Leaving the Federal Government You lose the ability to make new contributions, but you keep the TSP’s investment funds, can still change allocations, and benefit from its low administrative costs.
Whether rolling into the new 401k makes sense depends on the fees and fund choices at that plan. Some private-sector 401ks charge expense ratios several times higher than the TSP. If the new plan is expensive or thin on options, leaving the balance in the TSP and directing new contributions to the 401k can be the better structure.