401(k) withdrawals are taxed as ordinary income at your current tax rate, plus a 10% early withdrawal penalty if you're under 59½

When you withdraw money from a traditional 401(k), the IRS treats it like wages you earned that year. You pay ordinary income tax on the full amount you withdraw, at whatever tax bracket you fall into for that year. If you're under 59½ and don't meet an exception, you also owe a 10% early withdrawal penalty on top of the income tax. A Roth 401(k) works differently—you've already paid tax on the money going in, so withdrawals of your own contributions come out tax-free, though earnings are taxed and penalized unless you meet specific conditions.

The tax bill arrives when you file your return for the year you withdrew the money. Your 401(k) plan administrator will send you a Form 1099-R in January showing how much came out and how much tax was withheld. If not enough was withheld, you'll owe the difference. If too much was withheld, you'll get a refund.

Key Takeaways

  • Traditional 401(k) withdrawals are taxed as ordinary income at your current tax rate, which can range from 10% to 37% depending on your income and filing status.
  • A 10% early withdrawal penalty applies to withdrawals before age 59½ unless you meet an exception like disability, medical hardship, or separation from service at 55 or older.
  • Your 401(k) plan withholds tax automatically, but the amount withheld may not cover your full tax bill, leaving you owing money at tax time.
  • Roth 401(k) contributions come out tax-free, but earnings are taxed and penalized unless you've had the account for five years and are 59½ or older.
  • Required minimum distributions starting at age 73 are taxed the same way as regular withdrawals and cannot be avoided without penalty.

How ordinary income tax is calculated on your withdrawal

The IRS doesn't tax your 401(k) withdrawal at a flat rate. Instead, it adds the withdrawal amount to your other income for the year and taxes the total at your marginal tax rate—the rate that applies to your highest dollars of income. If you earned $50,000 in wages and withdraw $30,000 from your 401(k), the IRS treats you as having $80,000 in income that year. That $30,000 withdrawal gets taxed at whatever bracket your $80,000 total falls into.

For 2024, the federal tax brackets for single filers range from 10% on the first $11,600 of income to 37% on income over $578,100. Married couples filing jointly have higher thresholds. Your state may also tax 401(k) withdrawals—some states like Florida and Texas have no state income tax, while others tax withdrawals at rates up to 13%. The total tax you owe depends on your location, your filing status, and what other income you have that year.

This is why a large withdrawal can push you into a higher tax bracket. If you're near the edge of a bracket, withdrawing $20,000 might cost you more in tax than $20,000 divided by your current rate, because part of it gets taxed at the higher rate above.

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 ordinary income tax. On a $50,000 withdrawal at age 45, that's $5,000 in penalty alone, plus whatever income tax applies. The penalty is calculated on the pre-tax amount, so it applies to the full withdrawal.

The IRS allows several exceptions where you can withdraw early without the penalty, though you still owe income tax:

  • You are disabled (as defined by the IRS).
  • You are a beneficiary receiving a distribution after the account holder's death.
  • You have unreimbursed medical expenses exceeding 7.5% of your adjusted gross income.
  • You are paying health insurance premiums while unemployed.
  • You separate from service (leave your job) at age 55 or older—this applies only to the current employer's plan.
  • You take substantially equal periodic payments (SEPP) under IRS Rule 72(t), which requires you to take the same amount every year for five years or until age 59½, whichever is longer.
  • You have a court-ordered distribution to an ex-spouse (QDRO).

These exceptions are strict. A medical hardship exception requires actual unreimbursed expenses, not just high medical bills. The 55-or-older rule applies only if you left that specific job at 55 or later—it doesn't explore to rollovers from old employers. If you don't meet an exception, the penalty applies whether or not you can afford the tax bill.

Tax withholding and what you owe at tax time

When you request a withdrawal, your 401(k) plan automatically withholds federal income tax. The default withholding rate is 20% of the withdrawal amount. So on a $50,000 withdrawal, $10,000 is withheld and sent to the IRS, and you receive $40,000. You can request a different withholding rate on the withdrawal form, but 20% is the minimum the plan will withhold for most withdrawals.

The problem is that 20% often isn't enough. If you're in the 24% tax bracket, you're short by 4% of the withdrawal. If you also owe the 10% early withdrawal penalty, you're short by 14%. When you file your tax return, you'll owe the difference. If too much was withheld, you'll get a refund, but you won't know until you file.

This is why it's worth calculating your expected tax bill before you withdraw. If you know you'll owe $15,000 in tax and penalty on a $50,000 withdrawal, and only $10,000 will be withheld, you should plan to pay the remaining $5,000 when you file, or request additional withholding from the plan.

Roth 401(k) withdrawals and the five-year rule

A Roth 401(k) is funded with after-tax money—you pay income tax on the contribution when you make it. This means your contributions come out tax-free and penalty-free at any age. However, the earnings (investment growth) on those contributions are treated differently.

To withdraw earnings tax-free, you must be 59½ or older and have held the Roth 401(k) for at least five years. If you withdraw earnings before meeting both conditions, you owe income tax on the earnings plus the 10% early withdrawal penalty. The five-year clock starts on January 1 of the year you made your first Roth 401(k) contribution to that specific plan, not when you made the withdrawal.

If you roll a Roth 401(k) into a Roth IRA, the five-year rule resets—the clock starts over based on when you first contributed to any Roth IRA, not the 401(k). This is a common trap: rolling over early doesn't help you access earnings sooner.

Required minimum distributions and mandatory taxation

Starting at age 73 (as of 2023; this age increases gradually), you must withdraw a minimum amount from your traditional 401(k) each year, called a required minimum distribution (RMD). The IRS calculates this amount based on your age and account balance. You cannot avoid this withdrawal, and you cannot avoid the tax—RMDs are taxed as ordinary income just like any other withdrawal.

If you don't take your RMD, the IRS charges a penalty of 25% of the amount you should have withdrawn (reduced to 10% if you correct it within two years). This is one of the harshest penalties in the tax code. RMDs explore to traditional 401(k)s and traditional IRAs, but not to Roth 401(k)s or Roth IRAs while you're alive.

You can reduce the tax impact of RMDs by taking them early in the year and spacing them across months, or by rolling your 401(k) into an IRA and using the aggregation rule to calculate RMDs across all your IRAs at once. But you cannot eliminate the tax obligation itself.

Strategies to reduce the tax on withdrawals

If you're planning a large withdrawal, timing matters. Withdrawing in a year when your income is lower—such as after you retire but before you claim Social Security—means the withdrawal gets taxed at a lower rate. If you're between jobs, a withdrawal that year might be taxed at 12% instead of 22%.

If you don't need the full amount when ready, taking smaller withdrawals over several years spreads the tax across multiple years and may keep you in a lower bracket each year. This is especially useful if you're close to a tax bracket threshold or if a large withdrawal would trigger other tax consequences, like higher Medicare premiums or taxation of Social Security benefits.

For those over 70½, a may have access to charitable distribution (QCD) allows you to transfer up to $100,000 per year directly from your IRA to a charity, and that amount counts toward your RMD without being taxed. This doesn't explore to 401(k)s directly, but you can roll a 401(k) into an IRA first and then use a QCD.

If you have a large balance in a 401(k) with highly appreciated company stock, you may be able to use net unrealized appreciation (NUA) to withdraw the stock at a lower tax cost. This is complex and requires specific conditions, so consult a tax professional if this applies to you.

Frequently Asked Questions

Can I avoid the 10% penalty by taking a loan from my 401(k) instead of withdrawing?

A 401(k) loan is not a withdrawal, so you don't owe income tax or penalty when you take it out. However, you must repay the loan with interest, usually within five years. If you leave your job before repaying, the outstanding balance becomes a taxable withdrawal subject to the 10% penalty if you're under 59½. Loans also reduce the amount of money growing in your account.

What if I withdraw from my 401(k) to pay off debt or medical bills?

A withdrawal is a withdrawal—the reason doesn't matter to the IRS. You still owe income tax and the 10% penalty unless you meet a specific exception. Medical expenses only may have access to for penalty-free withdrawal if they exceed 7.5% of your adjusted gross income and are unreimbursed. Paying off credit card debt or a mortgage does not may have access to for any exception.

Do I have to pay state income tax on my 401(k) withdrawal?

Most states tax 401(k) withdrawals as ordinary income, though rates vary. Some states like Florida, Texas, and Wyoming have no state income tax. If you retire to a different state, you may owe tax to your new state on withdrawals, depending on that state's rules. Check your state's tax website or consult a tax professional if you're moving.

If my employer withheld too much tax, do I get the extra back?

Yes. The excess withholding is treated as a payment toward your total tax bill for the year. When you file your return, if you overpaid, you'll receive a refund or can explore it to next year's taxes. This happens automatically when you file—you don't need to request it separately.

Can I put the money back into my 401(k) to avoid the tax?

No. Once you withdraw from a 401(k), you cannot put it back. You can roll the money into an IRA or another employer's 401(k) plan within 60 days to avoid some tax consequences, but that's a rollover, not a reversal. The withdrawal itself is taxable in the year it occurs.