How 401(k) withdrawals are taxed depends on when you take the money and your age
A 401(k) withdrawal is taxed as ordinary income at your current tax bracket — the same rate you pay on wages. If you withdraw $10,000 and you're in the 22% federal tax bracket, you owe roughly $2,200 in federal income tax on that withdrawal. The exact amount depends on your total income that year, your filing status, and whether you live in a state with income tax.
The catch is that withdrawals before age 59½ usually trigger a 10% early withdrawal penalty on top of the income tax. So that same $10,000 withdrawal would cost you $1,000 in penalty plus $2,200 in tax — a total of $3,200 — unless an exception applies. After 59½, you can withdraw without the penalty, but you still owe income tax.
Your employer withholds taxes automatically from most 401(k) withdrawals, but the amount withheld may not cover your full tax bill. You might owe more when you file your return, or you might get a refund.
Key Takeaways
- 401(k) withdrawals are taxed as ordinary income at your current federal tax bracket, plus state income tax if your state has one.
- Withdrawals before age 59½ are subject to a 10% early withdrawal penalty on top of income tax, unless a specific exception applies.
- Your employer withholds a percentage of each withdrawal for taxes, but this may not equal your actual tax liability.
- Roth 401(k) contributions come out tax-free if you meet age and account-holding requirements, but earnings are taxed like traditional 401(k) withdrawals.
- Required minimum distributions (RMDs) starting at age 73 are taxed as ordinary income and cannot be avoided without penalty.
The difference between traditional and Roth 401(k) taxation
A traditional 401(k) is funded with pre-tax dollars — money that reduces your taxable income when you contribute. When you withdraw, the entire amount (contributions plus earnings) is taxed as ordinary income. This is why the tax bill can feel large: you're paying tax on money you never paid tax on before.
A Roth 401(k) works the opposite way. You contribute after-tax dollars, so you don't get a tax deduction when you put money in. When you withdraw after age 59½ and you've held the account for at least five years, your contributions and earnings come out tax-free. If you withdraw before meeting both conditions, your contributions are always tax-free, but earnings are taxed as ordinary income plus the 10% early withdrawal penalty.
Many employers offer both types. If you have both accounts, withdrawals from each are taxed separately — a Roth withdrawal doesn't affect how your traditional 401(k) withdrawal is taxed.
Early withdrawal penalties and the exceptions that avoid them
The 10% penalty applies to any withdrawal before age 59½, but the IRS allows exceptions. The most common are: separation from service (leaving your job), disability, medical expenses that exceed 7.5% of your adjusted gross income, and substantially equal periodic payments (a complex calculation that locks you into regular withdrawals for five years or until 59½, whichever is longer).
Other exceptions include withdrawals for a first-time home purchase (up to $10,000 lifetime), higher education expenses, health insurance premiums while unemployed, and IRS levy. Roth 401(k) contributions (not earnings) can always be withdrawn penalty-free, since you already paid tax on them.
If you don't meet an exception, the penalty is 10% of the amount withdrawn, calculated on your tax return. It's separate from income tax — you owe both.
How withholding works and why your refund or bill might surprise you
When you request a 401(k) withdrawal, your plan administrator withholds federal income tax automatically. The default withholding rate is 20% for lump-sum distributions and 10% for periodic withdrawals, though you can request a different rate on IRS Form W-4P.
The problem: 20% withholding is rarely the exact amount you'll owe. If you're in the 24% tax bracket, 20% won't cover it. If you're in the 12% bracket, you've had too much withheld and will get a refund. State income tax is not withheld unless you request it, so you may owe state tax on top of what you already paid federally.
When you file your tax return, the IRS compares what was withheld to what you actually owe based on your total income for the year. If too little was withheld, you owe the difference. If too much was withheld, you get a refund. This is why some people are surprised by a large tax bill or a smaller refund than expected after a 401(k) withdrawal.
Required minimum distributions and their tax treatment
Starting at age 73 (as of 2023), you must withdraw a minimum amount from your traditional 401(k) each year, calculated by the IRS based on your age and account balance. These required minimum distributions (RMDs) are taxed as ordinary income, just like any other withdrawal. You cannot avoid the tax by not taking the distribution — if you miss an RMD, the IRS charges a 25% penalty on the amount you should have withdrawn (reduced to 10% if you correct it within two years).
Roth 401(k)s do not require distributions during the account holder's lifetime, but beneficiaries who inherit a Roth 401(k) must take distributions and pay tax on earnings (though not on contributions).
If you have multiple 401(k) accounts, you calculate the RMD for each separately, but you can withdraw the total from one account if you choose.
Tax brackets and how your withdrawal affects your overall tax bill
A 401(k) withdrawal is added to your other income for the year — wages, interest, dividends, and so on. This combined total determines your tax bracket. A large withdrawal can push you into a higher bracket, meaning not only the withdrawal but also your other income is taxed at a higher rate.
For example, if you earn $50,000 in wages and withdraw $30,000 from your 401(k), your taxable income is $80,000. Depending on your filing status, this might move you from the 12% bracket into the 22% bracket. The entire $80,000 is taxed at the higher rate, not just the withdrawal.
This is why some people spread withdrawals across multiple years or take withdrawals in years when their other income is lower — it can reduce the overall tax impact. A tax professional can model different withdrawal scenarios for you.
State income tax on 401(k) withdrawals
Federal income tax is only part of the bill. If you live in a state with income tax, you owe state tax on your 401(k) withdrawal as well. The rate varies by state — some states tax 401(k) withdrawals at the same rate as wages, while others have different rules for retirement income.
Nine states have no income tax: Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, Wyoming, and New Hampshire (which taxes only dividends and interest, not wages or 401(k) withdrawals). If you move to one of these states after retiring, withdrawals taken after the move are not subject to state income tax, though you may still owe tax to your former state on withdrawals taken while you lived there.
Your 401(k) plan administrator does not automatically withhold state income tax. You must request it separately, or you'll owe the state when you file your return.
Frequently Asked Questions
Can I avoid the 10% penalty by rolling my 401(k) into an IRA?
A rollover itself is not taxed and does not trigger the penalty. However, once the money is in an IRA, the same early withdrawal rules explore — you still owe the 10% penalty if you withdraw before 59½, unless an exception applies. A rollover does not erase the penalty; it just moves the money to a different account type.
What happens if I don't have enough withheld and can't pay the tax bill?
You can set up a payment plan with the IRS, pay in installments, or request an offer in compromise if you cannot pay. Contact the IRS directly or work with a tax professional. Ignoring the bill results in penalties and interest that grow over time.
If I withdraw $50,000, do I owe tax on the full $50,000?
Yes, from a traditional 401(k), the full $50,000 is taxed as ordinary income. If you're in the 22% bracket, you owe roughly $11,000 in federal tax, plus the 10% early withdrawal penalty ($5,000) if you're under 59½, plus state income tax. The withholding your employer takes out reduces what you receive, but you still owe the full tax amount.
Are 401(k) withdrawals taxed differently if I'm retired?
No. The tax rate is based on your total income that year, not your employment status. A retiree who withdraws $40,000 from a 401(k) and receives $20,000 in Social Security has $60,000 in taxable income and is taxed accordingly. Being retired does not lower the tax rate on withdrawals.
Do I owe tax on 401(k) contributions my employer matched?
Yes. Employer matching contributions are pre-tax dollars, so when you withdraw them, they're taxed as ordinary income along with your own contributions and all earnings. Only Roth contributions (yours and any employer match to a Roth 401(k)) come out tax-free if you meet the age and holding-period requirements.