A 401(k) withdrawal calculator converts a gross distribution into the cash you actually keep after ordinary income tax and the early-withdrawal penalty.
Formula: net = gross − (gross × income tax rate) − (age < 59.5 ? gross × 10% : 0)
Example: $10,000 − $2,200 tax − $1,000 penalty = $6,800 net
Finance
Instant, private, and free
401(k) Withdrawal Calculator.
See how much cash you keep after income tax and any 10% early-withdrawal penalty.
Set your values
Results update as you type.
A 10% penalty applies before age 59½.
Breakdown
FAQs
How much tax will I owe on a 401(k) withdrawal?
Withdrawals from a traditional 401(k) are ordinary income, so you owe tax at your marginal rate. Some plans also withhold 20% up front as a prepayment toward that tax.
When does the 10% early-withdrawal penalty apply?
The additional 10% penalty generally applies to distributions taken before age 59½. Exceptions include certain disability, medical, or first-home situations.
Does age 59½ remove every cost?
It removes the 10% penalty, but ordinary income tax still applies. This calculator applies the marginal rate you supply regardless of age.
Cite this calculator
Canonical URL: https://mathify.one/en/finance/401k-withdrawal
Cite as: Mathify. (2026). 401(k) Withdrawal Calculator. https://mathify.one/en/finance/401k-withdrawal
Use Cases
Planning an early withdrawal
See the real cash you would receive before deciding whether a hardship withdrawal is worth it.
Example: A $10,000 withdrawal at a 22% marginal rate at age 45 nets $6,800 after $2,200 tax and a $1,000 penalty.
Comparing a withdrawal with a 401(k) loan
Use the net amount to compare against borrowing, which avoids tax and penalty if repaid.
Example: The same $10,000 costs $3,200 in tax and penalty if withdrawn rather than borrowed.
Retirement income planning
Estimate take-home cash from withdrawals once you are past 59 and a half.
Example: At 65 with a 22% rate, $10,000 nets $7,800 with no penalty.
Frequently Asked Questions
- How much tax will I owe on a 401(k) withdrawal?
- Withdrawals from a traditional 401(k) are ordinary income, so you owe tax at your marginal rate. Many plans also withhold 20% up front as a prepayment toward that tax.
- When does the 10% early-withdrawal penalty apply?
- The additional 10% penalty generally applies to distributions taken before age 59 and a half. Certain disability, medical, or first-home exceptions may waive it.
- Does reaching age 59.5 remove every cost?
- It removes the 10% penalty, but ordinary income tax still applies. This calculator applies the marginal rate you supply at every age.
- Are state taxes included?
- No. The calculator applies only the federal marginal rate you enter. Add your state rate separately if your state taxes retirement distributions.
Tips & Common Mistakes
Tips
- Confirm your plan's mandatory withholding, often 20% for eligible rollover distributions.
- Consider rolling a 401(k) into an IRA before withdrawing if you want more investment choices.
- Lower your taxable income with other deductions before pulling a large lump sum.
- Ask whether an exception to the 10% penalty applies to your situation.
Common Mistakes to Avoid
- Confusing the 20% default withholding with your actual tax bill; the two are not the same.
- Forgetting that the penalty is calculated on the gross withdrawal, not on the after-tax amount.
- Withdrawing a round number and assuming you keep all of it.
- Ignoring state income tax, which can add several percentage points.
Last updated: September 11, 2026