Free Tax Tool

401(k) Withdrawal Tax Calculator

Estimate how much tax you will pay on a 401(k) withdrawal in 2026, including federal income tax, the 10% early withdrawal penalty, state tax, and how the 20% withholding compares to what you actually owe.

$

Gross amount taken from a traditional (pre-tax) 401(k)

Rule of 55, disability, SEPP, QDRO, medical, birth or adoption, etc.

$

Wages, self-employment, pensions, interest, etc.

Optional, applies the state's top rate as a rough estimate

Estimated 2026 401(k) withdrawal tax

Amount you keep after taxes

$14,250.00

Withdrawal amount
$20,000.00
Federal income tax (18.8% on the withdrawal)
$3,750.00
10% early withdrawal penalty
$2,000.00
State income tax
$0.00
Total taxes and penalty
$5,750.00
Effective rate on the withdrawal
28.75%

Estimate only. Federal tax is the extra 2026 income tax from adding the withdrawal on top of your other income after the standard deduction. The 10% additional tax applies because you are under 59½ and no exception applies. State tax uses the state's top marginal rate as an approximation; some states exempt part or all of retirement income.

20% withholding vs. what you actually owe

Estimated additional federal tax due

$1,750.00

Withheld at payout (20%)
$4,000.00
Estimated federal tax plus penalty
$5,750.00
Check you receive from the plan (before state withholding)
$16,000.00

Plans must withhold 20% for federal tax on eligible rollover distributions paid to you. Withholding is a prepayment, not the final tax: it is credited against your income tax and the 10% additional tax when you file. Hardship distributions are not eligible rollover distributions, so they usually have 10% withheld instead unless you opt out.

How 401(k) withdrawal tax is calculated

  1. Add the withdrawal to your other income. Traditional 401(k) money is pre-tax, so the full amount is ordinary income.
  2. Federal income tax is the difference between the tax on your taxable income with the withdrawal and without it, after the standard deduction.
  3. If you are under 59½ and no exception applies, add the 10% additional tax on the withdrawal.
  4. Add state income tax, then subtract the total from the withdrawal to get what you keep.

Example: a single filer under 59½ with $60,000 of other income withdraws $20,000 and lives in a state with no income tax. Taxable income rises from $43,900 to $63,900. The first $6,500 is taxed at 12% ($780) and the remaining $13,500 at 22% ($2,970), so federal income tax is $3,750. The 10% penalty adds $2,000, for a total of $5,750 (28.75%). They keep $14,250.

The plan withholds 20%, or $4,000, at payout, so the check is $16,000. Because the true federal cost is $5,750, about $1,750 more is due at tax time. Plan for that balance, or ask the plan to withhold more.

Frequently asked questions

How much tax will I pay on a 401(k) withdrawal?

Withdrawals from a traditional 401(k) are taxed as ordinary income at your federal bracket rate, from 10% to 37%, plus any state income tax. Because the withdrawal stacks on top of your other income, a large withdrawal can push part of it into a higher bracket. If you are under 59½, add a 10% additional tax unless an exception applies.

What is the 401(k) early withdrawal penalty?

It is a 10% additional tax on the taxable amount you withdraw before age 59½. It is reported on Form 5329 and is owed on top of regular income tax. A $20,000 early withdrawal costs $2,000 in penalty alone, before income tax.

Which exceptions avoid the 10% penalty?

Common exceptions for 401(k) plans include separation from service in or after the year you turn 55 (the rule of 55), total and permanent disability, death, substantially equal periodic payments (SEPP), payments to an alternate payee under a QDRO, unreimbursed medical expenses above 7.5% of AGI, up to $5,000 per child for a birth or adoption, one emergency personal expense distribution of up to $1,000 per year, terminal illness, distributions to domestic abuse victims, qualified disaster distributions, and IRS levies. You still owe regular income tax.

What is the rule of 55?

If you leave your job (quit, are laid off, or retire) in or after the calendar year you turn 55, withdrawals from that employer's 401(k) are not subject to the 10% penalty. The age is 50 for qualified public safety employees in government plans. It only applies to the plan of the employer you left, not to IRAs or old 401(k)s from earlier jobs.

Why was 20% withheld from my 401(k) withdrawal?

Federal law requires plans to withhold 20% from eligible rollover distributions paid directly to you. That 20% is a prepayment toward your tax, not the final amount. If your actual federal tax plus any penalty is more than 20%, you owe the difference when you file. If it is less, you get a refund. A direct rollover to an IRA or another plan avoids the withholding.

Are Roth 401(k) withdrawals taxed?

Qualified Roth 401(k) distributions are completely tax-free. To be qualified, the account must be at least 5 years old and you must be 59½ or older, disabled, or deceased. A non-qualified withdrawal is split between your contributions (tax-free) and earnings, and the earnings portion is taxable and may owe the 10% penalty. This calculator assumes a traditional, pre-tax 401(k).

Are hardship withdrawals taxed and penalized?

Yes. A hardship withdrawal lets you access the money while still employed, but it is still taxable income and still owes the 10% penalty if you are under 59½, unless a separate exception (such as medical expenses above 7.5% of AGI) applies. Hardship distributions cannot be rolled over, so the 20% mandatory withholding does not apply; plans generally withhold 10% unless you opt out.

Is a 401(k) loan better than a withdrawal?

Often, if your plan allows loans. A loan of up to the lesser of $50,000 or 50% of your vested balance is not taxed or penalized as long as you repay it on schedule, usually within 5 years. The risk: if you leave your job with a balance outstanding, the unpaid amount can become a taxable distribution, plus the penalty if you are under 59½, unless you roll it over by your tax filing deadline.

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