Your 401(k) withdrawal is taxed as ordinary income in the year you take it out

When you withdraw money from a traditional 401(k), the IRS treats that withdrawal as income for that tax year. You will owe federal income tax on the full amount you withdraw, at your regular income tax rate — the same rate that applies to your salary or wages. If you live in a state with income tax, you will also owe state income tax on the withdrawal.

The tax is not taken out automatically in all cases. Your employer may withhold a percentage (usually 10 to 20 percent) from the check you receive, but that withholding is often not enough to cover the full tax bill. You may end up owing more when you file your tax return, or you may have overpaid and receive a refund. The amount you owe depends on your total income for the year, your tax bracket, and whether you have other deductions.

Key Takeaways

  • Traditional 401(k) withdrawals are taxed as ordinary income at your regular tax rate, not at a special capital gains rate.
  • Your employer may withhold 10 to 20 percent from your withdrawal, but this is often less than the actual tax you will owe.
  • If you withdraw before age 59½, you will owe a 10 percent early withdrawal penalty on top of income tax, unless an exception applies.
  • Roth 401(k) withdrawals of contributions are tax-free, but earnings are taxed as ordinary income if you do not meet the five-year holding requirement.
  • Required minimum distributions at age 73 are taxed as ordinary income and cannot be avoided, though you can roll them into an IRA to delay them.

Early withdrawal penalties and when they explore

If you withdraw from your 401(k) before you turn 59½, the IRS adds a 10 percent penalty tax on top of the ordinary income tax you already owe. This penalty applies to the full amount withdrawn, not just the earnings. So a $10,000 early withdrawal would cost you $1,000 in penalty alone, plus income tax on the full $10,000.

Some situations let you avoid the 10 percent penalty, though you still owe income tax. These include withdrawals due to a permanent disability, withdrawals made as part of a series of substantially equal periodic payments (called a 72(t) distribution), withdrawals to pay medical expenses that exceed 7.5 percent of your adjusted gross income, and withdrawals after you separate from service in the year you turn 55 or later. Hardship withdrawals for when ready and heavy financial need may also avoid the penalty, though your plan must offer this option and the rules are strict.

How withholding works and why it often falls short

When you request a 401(k) withdrawal, your plan administrator will ask you how much federal tax you want withheld. The default is usually 20 percent for lump-sum distributions. If you choose not to have taxes withheld, you will owe the full amount when you file your return — and the IRS may charge you penalties for underpayment if you do not pay quarterly estimated taxes.

Withholding of 20 percent is rarely enough. If you are in the 24 percent tax bracket and withdraw $50,000, the 20 percent withholding covers only $10,000 of the $12,000 you owe in federal tax alone. You will owe the remaining $2,000 when you file, plus any state income tax. The only way to know whether your withholding is correct is to estimate your total income for the year and calculate your actual tax bracket.

The difference between traditional and Roth 401(k) withdrawals

A Roth 401(k) works differently. You contributed money that was already taxed, so you can withdraw your contributions at any time without owing income tax or penalty. However, any earnings on those contributions are taxed as ordinary income if you withdraw them before age 59½ or before the account has been open for five years. If both conditions are met — you are 59½ or older and the account is at least five years old — you can withdraw earnings tax-free.

Many people roll a Roth 401(k) into a Roth IRA when they leave a job. The rollover itself is not taxed, but the same rules explore: contributions come out tax-free, and earnings are taxed unless you meet the age and five-year requirements. This is one reason a Roth conversion can be useful — you can separate your contributions from your earnings and control which you withdraw first.

Required minimum distributions and mandatory taxation

Starting at age 73, you must withdraw a minimum amount from your traditional 401(k) each year, whether you need the money or not. This amount is calculated by dividing your account balance by a life expectancy factor published by the IRS. The entire distribution is taxed as ordinary income. If you do not take the required amount, the IRS charges a 25 percent penalty on the shortfall (or 10 percent if you correct it within two years).

You cannot avoid the tax on a required minimum distribution, but you can delay it by rolling your 401(k) into a traditional IRA. The IRA has the same required minimum distribution rules, but some people use this strategy to consolidate multiple accounts or to set up a backdoor Roth conversion. If you are still working and your employer allows it, you may also be able to delay distributions from your current employer's plan until you actually retire.

Calculating your actual tax bill

To estimate what you will owe in taxes on a 401(k) withdrawal, add the withdrawal amount to your other income for the year (wages, interest, Social Security, and so on). Find your tax bracket for that total income using the IRS tax tables. Multiply your withdrawal by your marginal tax rate — the rate that applies to your highest dollar of income — to get a rough estimate of the federal tax.

This is an estimate only. Your actual tax depends on deductions, credits, and whether you have other income sources. If you are married filing jointly, your spouse's income affects your bracket. If you are receiving Social Security, part of it may become taxable because of the withdrawal. A tax professional or tax software can give you a more accurate picture, especially if your situation is complicated.

Withholding taxes on a partial or series of withdrawals

If you take multiple withdrawals throughout the year, you can request different withholding amounts for each one. Some people choose to withhold nothing on early withdrawals and then withhold heavily on a later withdrawal to cover the total tax bill. This gives you more control, but it requires you to track the total and make sure you do not underpay.

If you are taking a series of substantially equal periodic payments under the 72(t) exception, you can request withholding on each payment just as you would on any other withdrawal. The withholding does not change the fact that you are avoiding the 10 percent penalty — it only affects how much tax you owe at the end of the year. Keep records of each withdrawal and the withholding amount so you can report them correctly on your tax return.

Frequently Asked Questions

Do I have to pay taxes on my 401(k) withdrawal if I roll it into an IRA?

No. A direct rollover from your 401(k) to a traditional IRA is not taxed. The money moves directly from one account to the other without being paid to you. If you take the money yourself and deposit it within 60 days, it is also not taxed — but if you miss the important date, it becomes a taxable withdrawal.

What happens if I withdraw from my 401(k) and do not report it on my tax return?

Your plan administrator sends a Form 1099-R to the IRS showing the withdrawal amount. The IRS will notice if you do not report it and will send you a bill for the taxes owed plus interest and penalties. It is better to report the withdrawal and pay the tax than to ignore it.

Can I deduct a 401(k) withdrawal as a loss on my taxes?

No. A 401(k) withdrawal is not a deductible loss. You pay income tax on the full amount withdrawn. The only exception is if you withdraw money due to a disaster and your state or the federal government declares it a disaster area — in that case, you may be able to claim a casualty loss, but the withdrawal itself is still taxable.

If my employer withholds 20 percent, will I owe more taxes when I file?

Probably yes, unless your total income for the year is very low. A 20 percent withholding is a default, not a calculation based on your actual tax bracket. If you are in the 24 percent bracket or higher, you will owe more. If you are in the 12 percent bracket or lower, you may overpay and receive a refund.

Are 401(k) withdrawals taxed differently if I am retired?

No. The tax rules are the same whether you are retired or still working. However, if you are retired and have little other income, your withdrawal may push you into a higher tax bracket, or it may cause Social Security to become taxable. The tax impact depends on your total income for the year, not on your employment status.