How TSP Withdrawals Are Taxed

When you take money out of your Thrift Savings Plan, how much you keep depends almost entirely on which side of the plan it came from. Traditional and Roth dollars are taxed on opposite schedules, and a few extra rules on withholding, penalties, and required distributions round out the picture. This guide walks through all of it in plain terms, so you can estimate what a withdrawal really costs before you take one.

The core split: traditional versus Roth

Everything starts here. Your TSP has a traditional side and a Roth side, and they are taxed as near-opposites.

Traditional TSP withdrawals

Traditional balances were funded with pre-tax money, so the tax comes due when you take it out. A traditional withdrawal is added to your taxable income for that year and taxed at your ordinary income tax rate. There is no lower capital-gains rate on it, and no special treatment. If you withdraw a large sum in one year, it stacks on top of your other income and can push part of it into a higher bracket.

Roth TSP withdrawals

Roth balances were funded with money you already paid tax on. A qualified Roth withdrawal, meaning you are at least 59 and a half and your Roth has met the five-year requirement, comes out completely tax-free, both your contributions and all the growth. If a Roth withdrawal is not qualified, the earnings portion can be taxable. The mechanics of that timing are covered in our guide to the five-year rule.

Withholding is not the same as your final tax

When you take a withdrawal, the TSP often holds back some federal tax up front, similar to how tax is withheld from a paycheck. Certain withdrawals paid directly to you carry a mandatory federal withholding, and other types withhold at rates you can sometimes adjust. It is important to understand that withholding is a prepayment, not your actual tax bill. Your real tax is settled when you file your return, and you could owe more or get some back depending on your full year. State tax, where it applies, is separate again.

The early-withdrawal penalty

Take money out too early and, on top of any income tax, a 10 percent penalty can apply. The usual threshold is age 59 and a half. There are exceptions, including a special rule for federal employees who separate from service in or after the year they reach a certain age, and other specific circumstances. Because the exceptions are detailed and depend on your situation, confirm whether one applies to you before counting on it.

Required minimum distributions

Traditional retirement money cannot grow tax-deferred forever. Starting at the required age, currently 73 under present law and scheduled to rise later this decade, you must begin taking required minimum distributions from your traditional TSP, and those are taxed as ordinary income. Roth money inside employer plans, under recent changes to the law, is no longer subject to required minimum distributions during the original owner's lifetime. For some savers, avoiding those forced taxable withdrawals is itself a reason to move money to the Roth side while they can.

How a Roth conversion changes the picture

Notice the pattern running through all of this: the tax pain sits on the traditional side. Traditional withdrawals are taxable, traditional balances trigger required distributions, and a big traditional withdrawal can spike your bracket. A Roth conversion is the lever that shifts future dollars from that taxable column into the tax-free one. You pay the tax now, on your terms, instead of later on the government's schedule. Whether that trade favors you depends on your tax rate now versus in retirement, which is exactly what a conversion analysis weighs.

Frequently asked questions

Are traditional TSP withdrawals taxed as income or as capital gains?

As ordinary income. Retirement account withdrawals do not get the lower long-term capital gains rate. The whole traditional withdrawal is added to your taxable income for the year.

Is my Roth TSP withdrawal really tax-free?

A qualified one is, meaning you are at least 59 and a half and have met the five-year requirement. Both your contributions and their growth come out tax-free. A non-qualified withdrawal can tax the earnings portion.

Does the TSP take out taxes automatically?

Often yes, as withholding on the withdrawal. But withholding is a prepayment toward your bill, not the final amount. Your actual tax is reconciled when you file, and state tax may apply separately.

Will a large withdrawal push me into a higher bracket?

It can, because a traditional withdrawal stacks on your other income. Spreading withdrawals or converting in planned amounts across years are common ways people manage this. Our conversion guide covers the bracket effect in more detail.

Sources

• Thrift Savings Plan, Roth in-plan conversions: tsp.gov
• Internal Revenue Service, retirement plan and IRA rules: irs.gov retirement plan FAQs
• Internal Revenue Service, required minimum distributions: irs.gov RMD FAQs