401(k) Withdrawal Calculator

What a 401(k) withdrawal really leaves you after federal tax and the 10% penalty, with the money stacked on your other income rather than flat-rated.

Three deductions arrive at three different times, and only one of them is the tax

Withdraw $50,000 from a 401(k) and three separate deductions land on it months apart, and people add them up wrong because they meet them one at a time. Here's the order.

1. The plan withholds 20% on the spot. That's IRC §3405(c), and it applies to an eligible rollover distribution, which most lump-sum withdrawals are. It's a deposit against your tax bill, and you experience it as money that never showed up. A hardship withdrawal or a required minimum distribution isn't an eligible rollover distribution, so those default to 10% instead.
2. The withdrawal is added to your income for the year. The tax it causes depends on what else you earned, and it's settled at filing, months later, when the deposit turns out to be short or over.
3. Under 59½, another 10% goes on top under §72(t), charged on the gross amount, before a penny of the tax comes off.

The second one is where flat-rate calculators go wrong. A $50,000 withdrawal by someone earning $85,000 doesn't sit in one bracket: part of it fills what's left of the 22% band and the rest spills into 24%, so the true rate on the withdrawal is somewhere between the two. Pick one rate and you're wrong. Confidently wrong, in one direction or the other, which is worse than knowing you're guessing.

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

Stack the withdrawal on top of the rest of your year's income, run the whole lot through the 2026 bands, and the tax the withdrawal causes is the difference between that bill and the bill you'd have had without it. There's no separate withdrawal rate to look up. Two passes through the table, not one. Here is the sum in the order the IRS does it.

1. Add up everything else you'll earn this year before tax. Wages, interest, self-employment, a bonus already banked. The form above calls this other income and starts it at $85,000.
2. Take off your standard deduction. A single filer under 65 gets $16,100 for 2026, and what's left is your taxable income before the withdrawal.
3. Run that figure through the bands: 10% up to $12,400, 12% to $50,400, 22% to $105,700, then 24% to $201,775. Three more bands sit above that one and the calculator applies all seven, so if your income and withdrawal together clear $201,775 the hand method needs the rest of the table from IRS Notice 2025-67 (IR-2025-111). Write the answer down.
4. Add the withdrawal to step 1 and do steps 2 and 3 again. Second bill minus first bill is the income tax the withdrawal costs you. One thing can move alongside it: if you are drawing Social Security, the withdrawal raises provisional income and can pull part of the benefit into tax behind it. That effect is priced separately, and the hand method above does not include it.
5. Under 59½ with no exception, add 10% of the gross withdrawal. The §72(t) additional tax is charged on the whole amount, before a penny of income tax comes off it.
6. Separately, work out what the plan already sent the IRS on your behalf: 20% of the gross under §3405(c). Subtract that from steps 4 and 5 combined, and what's left is the balance you owe at filing.

Put the calculator's own defaults through it. $85,000 of other income, a $50,000 withdrawal, single, age 45. Step 2 leaves $68,900 taxable, step 3 taxes that at $9,870, and adding the withdrawal lifts the taxable figure to $118,900, which the same bands charge $21,134 on. Subtract, and the withdrawal itself costs $11,264 of income tax. That is 22.5% of it, not the 22% anyone would have guessed from a bracket table. Step 5 adds $5,000 of penalty, step 6 finds the plan has already taken $10,000, and the whole thing lands where the tool lands: $16,264 of federal cost, $33,736 kept, and $6,264 still owed in April on top of the $40,000 that reached your account.

Step 2 is where the hand calculation usually breaks. People subtract the standard deduction from the withdrawal, and it isn't there to subtract, because the salary in step 1 used it up before the withdrawal arrived. Not one dollar of it is sheltered. None of it is taxed at 10% or 12%, the first dollar out lands at 22% and the last lands at 24%, and deducting $16,100 a second time brings the answer out $3,806 light.

No arrangement of those six steps makes the income tax disappear, and a page promising you otherwise is describing a Roth account or a rollover, neither of which is a withdrawal.

What are the penalties for early withdrawal from a 401(k)?

One penalty: 10% of the gross amount, charged under IRC §72(t) on money taken out of a 401(k) before 59½ when no exception applies. That is the entire list. No second federal penalty, no plan charge on top, and nothing that grows with the size of the withdrawal beyond the flat 10% itself.

Two other deductions get called penalties and neither one is. Income tax isn't a penalty, because the same dollars would be taxed at 65 or at 80 anyway; pre-tax money is taxed whenever it leaves, and going early only changes which year's bands it falls into. The 20% the plan holds back under §3405(c) isn't a penalty either, though it's the one that feels most like a punishment, because it's the only deduction you watch happen.

On a $50,000 withdrawal by someone aged 45 earning $85,000, the 10% comes to $5,000 against a total federal cost of $16,264. Under a third of the damage. The rest is income tax pulled forward into a year when a salary has already filled the cheap bands, and that is the expensive half, the half nobody calls a penalty.

The 10% is also the only piece you can sometimes delete outright. A statutory exception takes it to zero and leaves the income tax exactly where it was, so read which exceptions exist and what each one requires before you tick the box on the calculator. That page owns the list; this one prices what the list does to your bill.

The IRS has the paperwork before you do, so an unreported withdrawal is caught by machine

Every 401(k) distribution produces a Form 1099-R, and the plan files a copy with the IRS whether or not you ever open yours. The IRS tells payers to file one for each person to whom a designated distribution was made, which means your copy is the duplicate.

So report the gross figure from that 1099-R as income, not the net that reached your bank. The 20% withheld goes in the payments box, where it's credited against the bill like any other withholding. Form 5329 is where the 10% usually lands, and the one way past it is narrower than people assume: the instructions for Form 5329 say that "if distribution code 1 is correctly shown in box 7 of all your Forms 1099-R and you owe the additional tax on the full amount shown on each Form 1099-R, you don't have to file Form 5329", and you put the charge straight on Schedule 2 instead.

Claiming an exception runs the other way.

The same instructions say you generally must file Form 5329 to report an exception to the 10%. So the exception is the thing that makes the extra form necessary, not the thing that excuses it, and a plan that has coded your 1099-R helpfully has still left you the filing.

Leave the whole thing off and what turns up isn't an audit. It's a CP2000, which the IRS sends when information from third parties such as employers or financial institutions doesn't match the return, and that notice proposes changes instead of billing you outright.

Interest is the quiet part.

The IRS charges it from the due date of the amount you owe until the balance is paid in full, and an extension to file never moved that date, so a notice that lands well after you filed arrives with the meter already run.

If you've already filed and forgotten one, Form 1040-X is the fix. The IRS lists correcting a filed Form 1040 as the first thing that form is for, and the sooner it goes in the less interest it carries. I'd hand a large one to a preparer, because the 10% and the exception code both live on forms most people have never seen.

At 59½ the penalty goes away and the tax doesn't

Everything above assumes the 10% applies, and from 59½ it doesn't, so the sum gets simpler without getting cheap.

The withdrawal is still ordinary income. It still stacks on everything else you earn that year, so it can still push you across a bracket, and on a $50,000 withdrawal the whole difference between being 45 and being 60 is the $5,000 penalty line. That's real money. It isn't the largest number on the page though, and if you set the age box above 59.5 you can watch which line vanishes and which one stays exactly where it was.

Age cuts the other way too. From 73 or 75, depending on your birth year, the IRS makes some of the money come out whether you want it or not, and the required distribution is taxed in the same stacked way. And if the withdrawal is paying for retirement instead of an emergency, the question stops being what one withdrawal costs and becomes how long the balance lasts, which is a different calculation.

Working out the day you actually turn 59½

Six calendar months after your 59th birthday, to the day. Someone born on 15 March reaches 59½ on 15 September of the year they turn 59, and can take money out the next morning without the 10%.

Three wrong versions of this circulate. It isn't the calendar year you turn 59½, which is the rule of 55's logic borrowed by mistake and pointed at the wrong age. It isn't 1 July. And it isn't your 60th birthday, which is the cautious error and costs nothing except six months of waiting for a §72(t) charge that had already gone.

A birthday at the end of a month is the case I can't give you a clean answer for. Born on 31 August, six months later is a date that doesn't exist, and I haven't found a plain IRS statement settling whether that lands on 28 February or 1 March. Within a week of the line, ask the plan administrator and get the answer in writing, because 10% of the withdrawal turns on a single day.

Cashing out when you leave a job is the expensive version

This is when most people take the money, and with the 10% still in play it's the worst possible moment.

You normally have four options with an old balance: leave it where it is, move it into the new employer's 401(k), roll it to an IRA, or cash it out. The first three aren't taxable events. Only the fourth is, and it's the one the provider's exit form makes easiest, because a cheque to you is the choice that needs the fewest account numbers filled in.

It happens quietly, mostly to people at 40 with a balance that looks too small to be worth the paperwork of a rollover. The bill is the income tax plus the 10% above, charged on money that can never be put back, because next year's limit is still just the limit. And if you left in or after the year you turned 55, keeping the money in the plan preserves an exception that rolling it to an IRA throws away.

The cost that isn't on any statement

Tax and penalty are the visible cost. The bigger one never shows up on anything the IRS sends you: the money has left a compounding 401(k) and can't be put back, because the annual limit is a limit. You can't repay a withdrawal next year on top of your usual contributions when $24,500 is the ceiling either way.

The calculator puts both figures side by side on purpose. Neither one settles it. Sometimes withdrawing $50,000 is the right call (a foreclosure notice is a better reason than a new kitchen), and a page that only shows you the compounding number is arguing with you, not calculating anything.

The cheap version of this is usually a loan or a different tax year

• A penalty exception. If one applies, a third of the cost disappears, and the rule of 55 in particular catches people out by being more generous than they expect. The exceptions are set out here.
• A plan loan. No tax, no penalty, and the interest goes back into your own account. It has real risks if you leave the job, but where it fits it's the cheaper route.
• Which year you take it in. The tax depends on your other income for the year, so a withdrawal in January of a year you won't be working can cost far less than the same withdrawal in December of a full earning year.

State tax isn't in this figure, and I won't pretend it is

From 59½ the penalty disappears, and the cost that replaces it is the Social Security a withdrawal drags into tax behind it. That case is priced on the monthly income page, which runs the same year twice to isolate what the withdrawal itself caused.

Most states tax it as income. Several exempt retirement income entirely, some exempt it only past a certain age, and a few add their own early-withdrawal penalty on top of the federal 10%. A single national figure would mislead everyone. I haven't found a maintained public table of the state add-ons that I'd trust enough to wire in, and I may simply have missed it.

So state treatment isn't modelled anywhere on this site, and we say so instead of guessing. Your real cost is the federal figure above, 10% included, plus whatever your state takes. What it would take to do it properly is written up with the formulas.

Frequently asked questions

How much tax will I pay if I withdraw from my 401(k)?

A pre-tax 401(k) withdrawal is ordinary income, so it's taxed at your rate once it's stacked on top of everything else you earn that year. There's no separate withdrawal rate. Because it stacks, a large withdrawal often straddles two brackets, part at 22% and part at 24% say, which is why a flat-rate estimate usually understates the bill. Before 59½ there's also a 10% additional tax under IRC §72(t).

How much do I actually get if I cash out my 401(k)?

Less than most people expect. On a $50,000 withdrawal by someone under 59½ earning $85,000, federal tax and penalty take roughly a third, and that's before any state tax. The calculator above gives the figure for your own income and age. Two of the three deductions, income tax and the penalty, can't be avoided. The third, the 20% withheld at source, is a deposit against the tax and not an extra cost.

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

IRC §3405(c) makes the plan withhold 20% of an eligible rollover distribution for federal tax. It's a deposit. The bill arrives later. If your actual tax and penalty come to more than 20% you owe the difference when you file, and if they come to less you get a refund. People who assume the 20% settles it are the ones surprised in April.

How can I avoid the 10% early withdrawal penalty?

By qualifying for one of the statutory exceptions, not by finding a loophole. The useful ones are separation from service in or after the year you turn 55 (the rule of 55), substantially equal periodic payments under §72(t)(2)(A)(iv), total and permanent disability, and qualified birth or adoption expenses. Each has conditions. The exceptions for a 401(k) aren't the same as those for an IRA.

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

Usually, if your plan offers one and you can repay it. A loan isn't taxed and carries no 10% penalty, and the interest is paid back into your own account. The risks are real though: leaving your job can accelerate repayment, and an unpaid balance is then treated as a distribution, taxed and, if you're under 59½, penalised.

Does a hardship withdrawal avoid the penalty?

No. A hardship withdrawal makes the money available where the plan wouldn't otherwise let you at it. It doesn't change the tax. It doesn't by itself waive the 10% penalty either. A hardship withdrawal that also happens to meet one of the §72(t) exceptions escapes the penalty because of the exception. The hardship had nothing to do with it.