About the 401(k) Early Withdrawal Calculator
This 401(k) early withdrawal calculator shows what you really keep when you take money out of a traditional 401(k) before retirement. It adds the federal income tax at your marginal bracket, state income tax, and the IRS 10% additional tax on early distributions, then subtracts them from the withdrawal to give your net cash.
It is meant for anyone considering cashing out a 401(k) after leaving a job, covering an emergency, or comparing a withdrawal with a 401(k) loan or other borrowing. It also estimates the opportunity cost: how much the same money could have grown to by your retirement age if left invested.
The 10% penalty generally applies before age 59½ unless an exception fits — such as separating from your employer in or after the year you turn 55, disability, or certain medical expenses. Tick the exception box if one applies to you. The federal tax estimate applies a single marginal rate from the 2026 federal brackets (10% to 37%) to the whole withdrawal, which is accurate only when the withdrawal does not push you into a higher bracket. The state rate is also applied as a flat rate. The value-at-retirement figure is hidden when your retirement age is not later than your current age.
With the default inputs, the cash you keep is $12,600.00. Change any value above to recalculate instantly.
How to use the 401(k) early withdrawal calculator
- 1Enter how much you plan to withdraw from your 401(k).
- 2Enter your age on the date of the withdrawal.
- 3Pick your federal tax bracket and enter your state income tax rate.
- 4Tick the exception box if the rule of 55 or another IRS exception applies.
- 5Compare the cash you keep with the value the money could reach by retirement.
Formula and method
A traditional 401(k) withdrawal is ordinary taxable income, so it is taxed at your marginal federal rate and your state rate. Before age 59½ the IRS also charges a 10% additional tax on the gross amount unless an exception applies. The net cash is the withdrawal minus these three amounts.
The plan normally withholds 20% for federal tax when it pays you directly; that is only a prepayment, and the real bill (and penalty) is settled on your tax return. The lost-growth figure compounds the gross withdrawal annually at your expected return until retirement age.
- W
- Gross withdrawal
- t_fed
- Federal marginal tax rate
- t_state
- State income tax rate
- r
- Expected annual return
- R
- Retirement age
Worked examples
$20,000 withdrawal at 40, 22% bracket, 5% state
Federal tax is $4,400, state tax $1,000 and the 10% penalty $2,000, so you keep $12,600 — 63 cents on the dollar. Left invested at 7% for 25 years, the $20,000 could have grown to about $108,500.
Rule of 55: $50,000 at age 56, 24% bracket
Because the exception applies, there is no 10% penalty. Federal tax of $12,000 and state tax of $2,000 leave $36,000 in hand.
After 59½: $30,000 at 62 in the 12% bracket, no state tax
At 62 the penalty no longer applies, so the only cost is 12% federal income tax ($3,600), leaving $26,400.
Frequently asked questions
What is the penalty for withdrawing from a 401(k) early?+
Withdrawals before age 59½ generally owe a 10% additional tax on the taxable amount, on top of regular federal and state income tax, unless an IRS exception applies.
What is the rule of 55?+
If you leave your employer (quit, are laid off or retire) in or after the calendar year you turn 55, withdrawals from that employer’s 401(k) are exempt from the 10% penalty. Qualifying public safety employees in governmental plans, such as state and local police and firefighters and certain federal law enforcement officers, can qualify from age 50 (or after 25 years of service).
Why did my plan only withhold 20%?+
Plans must withhold 20% for federal tax on eligible rollover distributions paid to you. Your actual tax plus the 10% penalty may be higher, so you could owe more when you file your return.
Are Roth 401(k) withdrawals taxed the same way?+
No. Roth contributions come out tax-free, but earnings withdrawn before age 59½ and five years of participation are taxable and may be penalized. This calculator assumes a traditional, fully pre-tax balance.
Is a 401(k) loan better than a withdrawal?+
A loan avoids taxes and the penalty if you repay it on schedule, and the interest goes back into your account. But if you leave your job the unpaid balance may become a taxable distribution.
Can a large withdrawal push me into a higher bracket?+
Yes. The withdrawal is added to your other income, so part of it can be taxed at the next bracket up. For large amounts, check the result with a full income tax calculator.
Tax results are estimates based on published rules and simplified assumptions. They are not tax advice — check official guidance or a tax professional for your situation.