How to use the early 401k withdrawal calculator
- Enter the amount you would withdraw, before anything is withheld.
- Enter your own federal income tax rate for this extra income, and a state rate if one applies. A large withdrawal can push you into a higher bracket, so test a few rates.
- Leave the additional early withdrawal tax at the general rate, or tick the box if you believe an exception applies to you.
- Read what is left after tax. In the advanced fields you can see how much the money might grow if it stayed invested.
Formula
Federal income tax = withdrawal x your rate
State income tax = withdrawal x state rate
Additional early withdrawal tax = withdrawal x additional rate (zero if an exception applies)
Left after tax = withdrawal - all three taxes
Growth given up = withdrawal x (1 + return)^years
The additional tax rate is an input, set to the general 10 percent. The tool does not decide whether an exception applies to you.
Worked example
You withdraw $20,000 and expect 22% federal tax and no state tax. Federal tax is $4,400 and the 10% additional tax is $2,000, so you keep $13,600, which is 68% of the withdrawal.
If an exception applies, the additional tax drops away and you keep $15,600. A 5% state tax would take another $1,000. And if the full $20,000 had stayed invested for 25 years at 6%, it would have grown to $85,837.41 before tax.
How early withdrawals are taxed in general
According to the IRS, an additional 10 percent tax generally applies to the taxable part of an early distribution from a retirement plan, and distributions before age 59 and a half are generally early. The withdrawal is also usually added to your income for the year and taxed at your ordinary rates. Source: IRS Topic no. 558 on additional tax on early distributions.
Exceptions
The IRS lists a number of exceptions, including total and permanent disability, certain medical expenses, payments after death to a beneficiary, separation from service in or after the year you turn 55 and other situations. The rules differ between a workplace plan and an IRA, and some exceptions have been added in recent years. This tool cannot tell whether one applies to you, so check the IRS page and ask a tax professional before you withdraw.
Withholding and what you actually owe
The amount your plan withholds may not match the tax you will owe, and the IRS notes that withholding may not cover the additional tax. You may owe more, or be due a refund. Consider alternatives such as a loan from the plan with the 401(k) loan calculator, and see the effect on your savings in the 401(k) calculator.
Assumptions and limits
- The federal and state rates are the ones you enter. The tool does not work out tax brackets.
- The additional early withdrawal tax defaults to 10 percent of the withdrawal. It applies to the taxable part, so a Roth account or after-tax money can differ.
- Exceptions are described in general terms only, with the IRS page fetched on 2026-10-12 as the source.
- This is an estimate and not tax or financial advice. Penalties for other reasons and plan fees are not included.
Frequently asked questions
How much tax do I pay on an early 401k withdrawal?
Generally income tax at your ordinary rate plus an additional 10 percent on the taxable amount, unless an exception applies. Enter your own rates to see the result.
At what age can I withdraw without the additional tax?
The IRS generally treats distributions before age 59 and a half as early. Exceptions can change that for certain situations.
Is the money I withdraw added to my income?
Yes, in general. It is added to the rest of your income for the year, which can move part of it into a higher bracket.
Is withdrawing from a 401k ever a good idea?
Sometimes it is needed in a true emergency, but it costs tax and long term growth. Look at other options first and talk with a professional.