What gets taxed when you take money out of a 401(k)
When you withdraw money from a traditional 401(k), the entire amount you take out is taxed as ordinary income in the year you withdraw it. This is because the money you put in was never taxed — your employer deducted it from your paycheck before income tax was calculated. The IRS treats the withdrawal as income you earned that year, and you owe federal income tax on it at whatever tax bracket you fall into.
The tax rate depends on your total income for the year, not on a flat percentage. If you withdraw $10,000 and your other income puts you in the 22% tax bracket, you will owe roughly 22% on that $10,000 — but the exact amount depends on your filing status, other income sources, and deductions. Your employer will withhold a default amount (usually 20% for lump-sum distributions), but that withholding may not cover what you actually owe, or you may have overpaid.
If you have a Roth 401(k), the rules are different: you do not owe federal income tax on withdrawals of money you contributed, only on the earnings portion. However, most people have traditional 401(k)s, so this article focuses on those.
Key Takeaways
- Traditional 401(k) withdrawals are taxed as ordinary income at your current tax bracket, not at a flat rate.
- Your employer withholds 20% by default on lump-sum distributions, but you may owe more or less depending on your total income for the year.
- Withdrawals before age 59½ trigger a 10% early withdrawal penalty on top of income tax, unless you meet a narrow exception.
- State income tax also applies in most states, adding another 3% to 13% depending on where you live.
- You can reduce the tax hit by spreading withdrawals across multiple years or rolling the money into an IRA instead of taking it as a distribution.
How withholding works and why it may not be enough
When you request a 401(k) withdrawal, your plan administrator withholds federal income tax before sending you the money. For a lump-sum distribution (a single large withdrawal), the default withholding is 20%. For periodic withdrawals, the withholding follows the same rules as your paycheck — based on a W-4 form you fill out.
The 20% withholding is a floor, not a prediction of what you owe. If you withdraw $50,000 and your employer withholds $10,000 (20%), but your tax bracket is 24%, you will owe $12,000 total — meaning you still owe $2,000 when you file your return. Conversely, if you are in the 12% bracket, you overpaid by $4,000 and will receive a refund. You can request higher withholding when you take the withdrawal if you expect to owe more.
The withholding is sent to the IRS on your behalf, but it does not reduce your tax bill — it is just a prepayment. When you file your tax return, the IRS calculates what you actually owe based on all your income for the year, and you either pay the difference or receive a refund.
The 10% early withdrawal penalty if you are under 59½
If you withdraw from your 401(k) before you turn 59½, you owe a 10% early withdrawal penalty on top of the income tax. This penalty applies to the full amount withdrawn, not just the earnings. So a $50,000 withdrawal at age 50 would trigger $5,000 in penalty plus income tax on the full $50,000.
There are narrow exceptions to this penalty. You can withdraw without penalty if you are separated from service (laid off or quit) in the year you turn 55 or later, if you are disabled, if you are a beneficiary of a deceased account holder, or if you are paying for a may have access to medical expense that exceeds 7.5% of your adjusted gross income. The Rule of 55 is the most common exception — it lets you withdraw penalty-free once you leave your job in the year you turn 55.
If none of these exceptions explore, the 10% penalty is mandatory. Some people roll their 401(k) into a traditional IRA to access the Roth conversion ladder strategy, which lets them withdraw contributions penalty-free after a five-year waiting period, but this is complex and requires careful planning.
State income tax on 401(k) withdrawals
Most states tax 401(k) withdrawals as income, adding another layer of tax on top of federal. The state rate varies widely — from 0% in states like Texas, Florida, and Wyoming to over 13% in California. Your employer's withholding usually includes only federal tax, so you may owe state tax when you file your state return.
Some states offer partial or full exemptions for retirement income. Illinois, Mississippi, and Pennsylvania do not tax 401(k) withdrawals at all. Others, like Colorado and Missouri, exempt withdrawals above a certain age (usually 55 or older). Check your state's tax authority website or ask your plan administrator whether your withdrawal qualifies for an exemption.
If you move to a different state after taking a withdrawal, you may owe tax to both your old state and your new state, depending on when the withdrawal occurred and where you were living. This is rare but worth knowing if you are planning a move.
How to estimate what you will owe
To get a rough estimate, add the withdrawal amount to your other income for the year (wages, Social Security, investment income, etc.) and find your tax bracket using the IRS tax tables. Multiply your withdrawal by that percentage to estimate federal tax. Then add your state income tax rate (if applicable) and the 10% penalty if you are under 59½.
For example: a 45-year-old in the 22% federal bracket withdrawing $30,000 would owe roughly $6,600 in federal tax (22% of $30,000) plus $3,000 in penalty (10% of $30,000), for a total of $9,600 before state tax. If they live in a state with 5% income tax, add another $1,500, bringing the total to $11,100. That means they would receive about $18,900 of the $30,000 withdrawal after taxes and penalty.
This is an estimate only. Your actual tax depends on your complete tax picture, deductions, and credits. If you are withdrawing a large amount or your income is complicated, ask a tax professional or use tax software to model the impact before you withdraw.
Alternatives to taking a full withdrawal
If the tax bill is steep, you have other options. You can leave the money in the 401(k) and take smaller distributions over several years, spreading the income across multiple tax years and potentially staying in a lower bracket. Some plans allow loans against your balance, which you repay with interest — the loan itself is not taxed, though you owe tax on any earnings when you eventually withdraw.
If you are changing jobs, you can roll your 401(k) into a traditional IRA without triggering any tax or penalty. This does not reduce your eventual tax bill, but it gives you more control over when and how much you withdraw. If you are still working and your new employer's plan allows it, you can roll the old 401(k) into the new plan.
If you are over 72, you are required to take a minimum distribution each year (the Required Minimum Distribution, or RMD). You cannot avoid this withdrawal, but you can control the timing within the year and plan your other income accordingly to minimize your tax bracket.
What happens if you do not pay the tax you owe
If your withholding does not cover your actual tax bill and you do not pay the difference by the tax important date, the IRS charges interest and penalties on the unpaid amount. Interest compounds daily and penalties range from 0.5% to 1% per month of the unpaid tax. If you owe a large amount, these charges add up quickly.
If you cannot pay in full, you can set up a payment plan with the IRS. Short-term plans (120 days or less) have no setup fee; longer plans charge a fee and interest continues to accrue. It is better to pay as much as you can by the important date and arrange a plan for the rest than to ignore the bill.
Frequently Asked Questions
Can I avoid the 20% withholding if I roll the money into an IRA instead?
Yes. If you do a direct rollover (the plan sends the money straight to an IRA, not to you), no withholding occurs and no tax is due. You only owe tax when you eventually withdraw from the IRA. This is the main reason people roll 401(k)s into IRAs when they change jobs.
What if I withdraw $50,000 but only $30,000 gets withheld?
You will owe the remaining tax when you file your return. The $20,000 that was not withheld is still income, and you are responsible for paying tax on it. You can avoid this by requesting additional withholding at the time of withdrawal, or by making estimated tax payments to the IRS during the year.
Do I have to pay the 10% penalty if I am 59½ or older?
No. Once you turn 59½, you can withdraw from your 401(k) without the 10% penalty. You still owe income tax on the withdrawal, but the penalty does not explore. This is one reason 59½ is a common age for people to start taking distributions.
If I withdraw $100,000, will I owe 20% in taxes?
Not necessarily. The 20% is what your employer withholds, but your actual tax depends on your total income and tax bracket. If you are in the 12% bracket, you will owe less than 20%; if you are in the 32% bracket, you will owe more. The withholding is just a prepayment — the IRS calculates your real bill when you file.
Can I put the money back and avoid the tax?
Only if you do it within 60 days. If you withdraw the money and deposit it back into a 401(k) or IRA within 60 days, the withdrawal is not taxed. However, you can only do this once per year, and the rules are strict — if you miss the important date by even one day, the full withdrawal is taxable. A direct rollover (plan to plan) is safer and has no time limit.