Most 401(k) withdrawals are taxed as ordinary income in the year you take them

Yes, 401(k) distributions are taxable. The money you withdraw from your 401(k) is added to your income for that tax year, and you pay federal income tax on it at your regular tax rate. If you withdraw $10,000, that $10,000 counts as income, which may push you into a higher tax bracket.

The reason is straightforward: when you contributed to your 401(k), most of that money came from your paycheck before taxes were taken out. Your employer didn't withhold income tax on it. So when you take the money out, the IRS collects the tax then.

Your 401(k) plan administrator will withhold a percentage of your distribution for federal income tax automatically — usually 10 to 20 percent, depending on the type of withdrawal and what you tell them. But that withholding is just an estimate. When you file your tax return, you may owe more tax, or you may get a refund.

Key Takeaways

  • 401(k) withdrawals are taxed as ordinary income at your regular tax rate, not at a special capital gains rate.
  • Your plan will withhold federal income tax automatically, but the amount withheld may not equal what you actually owe.
  • If you withdraw before age 59½, you typically owe a 10 percent early withdrawal penalty on top of income tax, with some exceptions.
  • State income tax may also explore to your withdrawal, depending on where you live and where your plan is based.
  • Roth 401(k) contributions and earnings have different tax rules than traditional 401(k) withdrawals.

How withholding works when you take a distribution

When you request a withdrawal from your 401(k), the plan sends you a form asking how much tax you want withheld. The IRS requires withholding on most distributions, but you control the amount.

If you tell the plan to withhold 10 percent, they take that out and send it to the IRS on your behalf. The rest goes to you. But if your tax bracket is 24 percent, you've only paid 10 percent, and you'll owe the remaining 14 percent when you file your return.

You can also request no withholding, though the plan may refuse. If you do get no withholding and you owe tax, you're responsible for paying it yourself by the tax important date — otherwise you face penalties and interest.

The 10 percent early withdrawal penalty

If you withdraw money before you turn 59½, you owe a 10 percent early withdrawal penalty on top of income tax. This penalty is separate from the tax itself. So a $10,000 withdrawal at age 45 costs you $1,000 in penalty plus whatever income tax applies.

The IRS does allow some exceptions. You can withdraw without penalty if you are permanently disabled, if you have significant medical expenses, if you are unemployed and paying for health insurance, or if you take substantially equal periodic payments under a specific IRS formula. Withdrawals to pay a court-ordered child support or alimony obligation also avoid the penalty.

If you leave your job, you may be able to roll your 401(k) into an IRA or another employer's plan instead of withdrawing it. That avoids both the tax and the penalty, though you must complete the rollover within 60 days.

Roth 401(k) distributions have a different tax structure

If your plan offers a Roth 401(k) option, the tax rules are different. Money you contribute to a Roth 401(k) comes from your paycheck after taxes are already taken out. When you withdraw it later, you don't pay income tax on the contribution itself.

However, you do pay income tax on the earnings — the investment gains your money made while in the account. And if you withdraw before age 59½, you owe the 10 percent penalty on the earnings portion (though not on your contributions).

The key advantage is that if you hold the account for at least five years and are age 59½ or older, you can withdraw both contributions and earnings tax-free. This makes Roth 401(k)s useful if you expect to be in a higher tax bracket in retirement.

State income tax on 401(k) withdrawals

Federal income tax is not the only tax on your withdrawal. Most states also tax 401(k) distributions as ordinary income. If you live in California and withdraw $10,000, you pay federal tax plus California state income tax on that amount.

A few states — including Texas, Florida, Nevada, South Dakota, Tennessee, Washington, and Wyoming — have no state income tax at all, so residents pay only federal tax. Other states tax 401(k) withdrawals but may offer a pension or retirement income exclusion that reduces the taxable amount. Check your state's tax rules or speak with a tax preparer about your situation.

How to estimate your tax bill before withdrawing

Before you take a distribution, you can estimate what you'll owe. Start with the withdrawal amount and multiply it by your federal tax bracket. Then add your state income tax rate. If you're under 59½, add 10 percent for the penalty.

For example, a $20,000 withdrawal at age 50, with a 22 percent federal bracket and 5 percent state tax, would cost roughly $20,000 × 0.22 = $4,400 federal, plus $20,000 × 0.05 = $1,000 state, plus $20,000 × 0.10 = $2,000 penalty, for a total of $7,400 in taxes and penalties. You'd receive about $12,600.

This is an estimate only. Your actual tax depends on your full year's income, deductions, and credits. A tax professional can give you a more precise number before you withdraw.

What happens if you don't withhold enough

If the withholding your plan takes out is less than what you owe, you must pay the difference when you file your tax return. You may also owe estimated tax penalties if you underpaid by a large amount.

If the withholding is more than what you owe, you get the overage back as a refund when you file. Many people prefer to over-withhold slightly to avoid owing money at tax time.

You can adjust your withholding by contacting your plan administrator and requesting a change to future distributions. If you've already taken a withdrawal and regret the withholding amount, you cannot change it retroactively — you deal with the difference on your tax return.

Frequently Asked Questions

Do I have to pay taxes on my 401(k) if I don't touch it?

No. As long as the money stays in your 401(k), you owe no tax. Tax is due only when you withdraw. However, once you turn 73, the IRS requires you to take minimum distributions each year, and those distributions are taxable.

What if I roll my 401(k) into an IRA instead of withdrawing it?

A direct rollover to an IRA is not a taxable event. The money moves from your 401(k) to the IRA without you receiving it, so no tax is due. You only pay tax later when you withdraw from the IRA. If you receive the money yourself and miss the 60-day important date to roll it over, it becomes a taxable withdrawal.

Can I avoid the early withdrawal penalty if I'm laid off?

Yes, under certain conditions. If you separate from service in the year you turn 55 or later, you can withdraw without the 10 percent penalty (though you still owe income tax). This is called the "Rule of 55." You must have left the job; you cannot use this rule if you're still employed.

Is the 10 percent penalty the same for everyone?

The penalty is 10 percent of the amount withdrawn for most people under 59½. However, if you take substantially equal periodic payments using an IRS-approved calculation, the penalty does not explore. These payments must continue for five years or until you turn 59½, whichever is longer.

What if I withdraw from my 401(k) while I'm still working?

You can withdraw from your current employer's 401(k) only if the plan allows it — not all plans permit in-service withdrawals. If yours does, the same tax rules explore: income tax, and the 10 percent penalty if you're under 59½ (with exceptions). Check your plan documents or ask your HR department whether in-service withdrawals are available.