401(k) withdrawals are taxed as ordinary income at your current tax rate, plus a 10% early withdrawal penalty if you take money out before age 59½

When you withdraw money from a traditional 401(k), the IRS treats it like wages you earned that year. You pay income tax on the full amount at whatever tax bracket you fall into. If you withdraw before 59½, you also owe a 10% penalty on top of the income tax—unless you may have access to for a narrow list of exceptions. A Roth 401(k) works differently: you pay no tax on withdrawals of money you contributed, but earnings come out taxed and penalized the same way as a traditional 401(k).

The tax is not taken out automatically in all cases. Your plan may withhold federal income tax (usually 20% for lump-sum distributions), but that withholding is just a down payment. You may owe more when you file your return, or you may get a refund. State income tax is a separate bill that varies by where you live.

Key Takeaways

  • Traditional 401(k) withdrawals are taxed as ordinary income at your current tax rate, which ranges from 10% to 37% depending on your total income for the year.
  • A 10% early withdrawal penalty applies to money taken out before age 59½, on top of income tax, unless you meet a specific exception like disability or a Roth conversion.
  • Your employer's plan may withhold 20% of a lump-sum distribution for federal tax, but this is not the final tax bill—you settle the rest when you file your return.
  • Roth 401(k) contributions come out tax-free, but earnings and conversions follow the same tax and penalty rules as traditional 401(k)s.
  • State income tax on 401(k) withdrawals depends on where you live and where you worked, and some states do not tax retirement income at all.

How ordinary income tax works on 401(k) withdrawals

The IRS adds your 401(k) withdrawal to all your other income for the year—wages, interest, capital gains, everything—and taxes the total at your marginal tax rate. That is the tax bracket you fall into based on your combined income. If you earn $50,000 in wages and withdraw $30,000 from your 401(k), you are taxed on $80,000 total, not on the $30,000 in isolation.

This matters because a large withdrawal can push you into a higher tax bracket. If you are single and earn $45,000 in wages, you are in the 22% bracket. A $20,000 withdrawal moves you to $65,000 total income, which puts you in the 24% bracket. You do not pay 24% on all $65,000—only on the income above the 22% threshold—but the withdrawal itself is taxed at 24%.

The tax is owed in the year you withdraw the money, whether or not your employer withholds it. If no tax is withheld, you may owe a large bill when you file your return. If too much is withheld, you get a refund.

The 10% early withdrawal penalty and its exceptions

If you withdraw before age 59½, you owe a 10% penalty on the amount withdrawn, in addition to income tax. On a $50,000 withdrawal, that is $5,000 in penalty alone. The penalty is calculated on the pre-tax amount and is reported separately on your tax return.

The IRS allows several exceptions where the penalty does not explore, though income tax still does:

  • You are disabled (as defined by the IRS, not your employer).
  • You are a beneficiary withdrawing after the account holder's death.
  • You have unreimbursed medical expenses above 7.5% of your adjusted gross income.
  • You are paying health insurance premiums while unemployed.
  • You convert the 401(k) to a traditional IRA and set up substantially equal periodic payments (SEPP), a specific withdrawal schedule the IRS approves.
  • You take a loan from your 401(k) instead of a withdrawal (though loans have their own rules and risks).
  • Your plan allows a hardship withdrawal for when ready and heavy financial need—rules vary by plan.

These exceptions are strict. "I need the money" is not enough. You must document the reason and meet the IRS definition. If you claim an exception and the IRS disagrees, you owe the penalty plus interest.

Withholding and what happens at tax time

When you take a lump-sum distribution from your 401(k)—a single large withdrawal—your employer must withhold at least 20% for federal income tax. If your plan allows periodic withdrawals, withholding is optional, and you can choose how much to withhold or none at all.

That 20% withholding is a deposit toward your tax bill, not the final amount. If your total tax owed is 24%, you still owe 4% more. If it is 15%, you get a refund of 5%. You find out when you file your return.

If you do not have enough withheld and owe more than $1,000 at tax time, you may also owe a penalty for underpayment of estimated tax. To avoid this, you can ask your employer to withhold extra, or you can make estimated tax payments yourself during the year.

Roth 401(k) withdrawal rules

A Roth 401(k) is funded with after-tax money, so withdrawals of your own contributions come out tax-free and penalty-free at any age. The earnings on those contributions, however, are taxed and penalized like a traditional 401(k) if you withdraw before 59½.

If you convert a traditional 401(k) to a Roth IRA, the conversion itself is a taxable event. You pay income tax on the full amount converted in that year. You do not pay the 10% penalty on the conversion, but if you withdraw the converted money within five years, the earnings portion is penalized.

Roth 401(k)s have required minimum distributions (RMDs) starting at age 73, meaning you must withdraw a certain amount each year whether you need the money or not. Roth IRAs do not have RMDs during your lifetime, which is one reason some people convert to a Roth IRA if they can afford the tax bill.

State income tax on 401(k) withdrawals

Federal income tax is only part of the bill. Most states tax 401(k) withdrawals as income, but the rate and rules vary. Some states do not tax retirement income at all—Florida, Texas, Wyoming, and others have no state income tax. Some tax only the earnings portion, not contributions. Some allow a deduction for retirement income above a certain age.

Your state tax bill depends on where you live when you withdraw the money, not where you worked or where the 401(k) is held. If you move to a no-income-tax state after you retire, withdrawals taken after the move are not taxed by your former state (with rare exceptions for people who move mid-year).

Your 401(k) plan statement should show federal withholding, but state withholding is less common. Check with your plan or a tax preparer about your state's rules before you withdraw.

How to estimate your tax bill before withdrawing

Before you take a large withdrawal, add it to your expected income for the year and find your tax bracket using the IRS tax tables. Multiply your withdrawal by that rate to estimate federal income tax. Add 10% if you are under 59½ and do not have an exception. Then add your state income tax rate if your state taxes retirement income.

Example: You earn $55,000 in wages, are 52 years old, and want to withdraw $25,000. Your combined income is $80,000. For a single filer in 2024, that puts you in the 22% federal bracket. Your federal tax on the withdrawal is roughly $25,000 × 0.22 = $5,500. Add the 10% penalty: $2,500. If you live in a state with 5% income tax, add $1,250. Your total estimated tax and penalty is about $9,250, leaving you $15,750 of the $25,000.

This is an estimate, not a may provide. Your actual bill depends on deductions, credits, and other income. A tax preparer or tax software can give you a more precise number before you withdraw.

Frequently Asked Questions

Can I avoid the 10% penalty by spreading the withdrawal over multiple years?

Not automatically. Each withdrawal is subject to the penalty if you are under 59½. However, if you set up substantially equal periodic payments (SEPP) through a conversion to a traditional IRA, you can withdraw without penalty as long as you follow the IRS schedule. This is complex and requires professional help to set up correctly.

What if my employer withholds 20% but I owe more tax?

You owe the difference when you file your return. If you expect to owe more than $1,000 beyond what is withheld, ask your employer to withhold extra, or make estimated tax payments during the year to avoid an underpayment penalty.

Do I have to pay tax on a 401(k) loan?

No. A loan is not a withdrawal, so there is no when ready tax or penalty. You repay the loan to your own account. However, if you leave your job before the loan is repaid, the unpaid balance is treated as a withdrawal and taxed and penalized.

Is there a way to withdraw from a 401(k) before 59½ without the penalty?

Yes, if you meet one of the IRS exceptions: disability, death (as a beneficiary), unreimbursed medical expenses, unemployment health insurance, or a substantially equal periodic payment plan. Hardship withdrawals are allowed by some plans but do not automatically waive the penalty—check your plan's rules.

What happens to my 401(k) if I move to a state with no income tax?

Your 401(k) balance stays the same. You pay no state income tax on withdrawals taken after you move, but you still owe federal income tax and the 10% penalty if you are under 59½. The move itself does not change your federal tax bill.