Taking cash out of a traditional 401(k) typically costs 30% to 50% of the amount you withdraw. The biggest pieces are federal income tax (10% to 37% depending on your bracket), a 10% early withdrawal penalty if you’re under 59½, and state income tax in most states. Plan fees can chip in, and the withdrawal permanently gives up whatever that money would have earned through decades of compounding. The full cost to withdraw from a 401(k) depends on your age, your other income, your state, and whether the account is traditional or Roth.
A quick example: a 35-year-old in the 22% federal bracket who pulls $20,000 from a traditional 401(k) owes roughly $4,400 in federal income tax plus $2,000 in penalty tax before state taxes even enter the picture. That’s close to a third of the withdrawal gone to the IRS alone.
Federal Income Tax on the Withdrawal
Every dollar from a traditional 401(k) counts as ordinary income the year you receive it. Contributions went in before federal income tax, so the IRS collects when the money comes out. The withdrawal stacks on top of your wages and other income and is taxed at your marginal rate. Federal brackets currently run from 10% to 37%.1Internal Revenue Service. Federal Income Tax Rates and Brackets
The stacking matters. If your salary already puts you in the 22% bracket and you take out $30,000, part of that withdrawal may be taxed at 22% and part at 24% once it pushes you into the next bracket. Larger withdrawals spill further up the schedule.
One thing you don’t pay twice: payroll taxes. Social Security and Medicare were already withheld from your paycheck before the money went into the 401(k), so the withdrawal owes income tax only, not another round of FICA.2Internal Revenue Service. 401(k) Plan Overview
State Income Tax
Most states treat 401(k) distributions as taxable income. About a dozen states either charge no income tax at all or specifically exempt retirement distributions; the rest take their cut. Effective rates vary widely, and a resident of a higher-tax state can face a combined federal-and-state rate above 40% on a large withdrawal. Someone in the 24% federal bracket paying a 6% state rate keeps only 70 cents of every dollar before any early withdrawal penalty is added.
The 10% Early Withdrawal Penalty
If you take money out before age 59½, the IRS adds a 10% tax on the taxable portion of the distribution.3Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts It’s a flat 10% of the gross taxable distribution, applied on top of your regular income tax.4Internal Revenue Service. Topic No. 558, Additional Tax on Early Distributions From Retirement Plans Other Than IRAs
Age is measured by when you receive the distribution, not when you request it. A payout that lands a few weeks before your half-birthday still triggers the full penalty.
The 20% That Gets Held Back Immediately
When you take a direct cash distribution rather than a rollover, federal law requires the plan to withhold 20% of the taxable amount and send it to the IRS on your behalf.5Office of the Law Revision Counsel. 26 USC 3405 – Special Rules for Pensions, Annuities, and Certain Other Deferred Income Ask for $25,000 and $20,000 hits your account.
That 20% is not a separate fee. It’s a prepayment of your tax bill, similar to paycheck withholding. At tax time you reconcile it against what you actually owe. If your combined federal rate plus the 10% penalty is above 20%, you’ll owe more in April. If it’s below, you get a refund. Many states also require their own withholding, cutting the upfront cash further.
A direct rollover to an IRA or another eligible plan avoids the withholding entirely because the money never passes through your hands.6Internal Revenue Service. 401(k) Resource Guide – Plan Participants – General Distribution Rules
Ways to Avoid the 10% Penalty
Several exceptions let you skip the penalty while still owing regular income tax. If any of these fit your situation, the cost of the withdrawal drops sharply.
The Rule of 55
If you leave your job during or after the calendar year you turn 55, distributions from the 401(k) at that employer are penalty-free. It only covers the plan tied to the job you just left, not older 401(k) accounts. Public safety employees, certain federal law enforcement officers, firefighters, and air traffic controllers qualify at 50 instead.7Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions
Disability or Terminal Illness
If you become permanently disabled, the 10% penalty doesn’t apply.3Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts The IRS applies a strict definition: you must be unable to engage in any substantial work due to a physical or mental condition expected to result in death or last indefinitely. A separate exception covers terminal illness certified by a physician as expected to result in death within 84 months; those distributions can be repaid to the plan within three years.
Birth or Adoption
Parents can take up to $5,000 per child, per parent, without the 10% penalty after a birth or adoption, and can repay the amount to a retirement plan within three years.7Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions Regular income tax still applies.
Large Medical Expenses
Unreimbursed medical expenses above 7.5% of your adjusted gross income escape the penalty, but only the portion above the threshold.4Internal Revenue Service. Topic No. 558, Additional Tax on Early Distributions From Retirement Plans Other Than IRAs With an $80,000 AGI and $10,000 in bills, only $4,000 qualifies.
Emergency and Domestic Abuse Withdrawals
Under newer SECURE 2.0 rules, you can take a penalty-free emergency personal expense withdrawal of up to $1,000 per calendar year; if you don’t repay a previous one, you must wait three years before taking another. Domestic abuse survivors can withdraw the lesser of $10,000 (adjusted for inflation) or 50% of their balance without the penalty, with three years to repay. Both still owe income tax.
Hardship Withdrawals Are Not Penalty-Free
A hardship withdrawal is one your plan permits while you’re still employed, but only for an immediate and heavy financial need. Not every plan offers them, and qualifying reasons are typically limited to:8Internal Revenue Service. Retirement Plans FAQs Regarding Hardship Distributions
- Medical expenses for you, your spouse, or dependents
- Costs directly tied to buying a principal residence
- Tuition and related fees for the next 12 months
- Payments needed to prevent eviction or foreclosure on your primary home
- Funeral or burial expenses for a family member
- Home repairs that qualify as a casualty loss
- Expenses from a federally declared disaster
The catch is that hardship status by itself does not remove the 10% early withdrawal penalty. You still owe it unless one of the separate exceptions above also applies. You also can’t roll a hardship withdrawal into another retirement account; the money is out permanently.
Roth 401(k) Withdrawals Cost Much Less
If some or all of your account is in a designated Roth, the math shifts. Roth contributions were made with after-tax dollars, so qualified distributions come out entirely tax-free, including earnings.9Internal Revenue Service. Retirement Topics – Designated Roth Account
A distribution qualifies if you’ve had the Roth account for at least five years (counting from January 1 of the first contribution year) and you’re at least 59½, disabled, or deceased. Otherwise, your contributions still come out tax-free, but earnings are taxed as ordinary income and may face the 10% penalty. A $50,000 qualified Roth 401(k) distribution can cost nothing in taxes, while the same amount from a traditional 401(k) can easily cost $15,000 or more.
Borrowing Instead of Withdrawing
If your plan offers 401(k) loans, borrowing avoids the immediate tax and penalty. You can borrow up to the lesser of $50,000 or 50% of your vested balance, and repayment usually runs five years.10Internal Revenue Service. Retirement Topics – Plan Loans Loans have costs too. Many plans charge origination and annual maintenance fees. Interest goes back to your own account, but you pay it with after-tax money and it gets taxed again when you withdraw in retirement.
The biggest loan risk is leaving your job before it’s paid off. If you can’t repay the outstanding balance by the tax-filing deadline for that year, the unpaid amount is treated as a taxable distribution and can trigger the 10% penalty.
The Penalty for Waiting Too Long
There’s a cost on the other end too. Starting at age 73, you must take required minimum distributions from a traditional 401(k) each year, unless you’re still working for the sponsoring employer and don’t own more than 5% of the company. Miss an RMD and the excise tax is 25% of the amount you should have taken, dropping to 10% if you correct the shortfall within two years.11Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs That’s on top of the regular income tax you’ll owe once the distribution comes out.
The Cost You Don’t See on Any Statement
Every withdrawal pulls money out of a tax-advantaged account where it could have kept compounding. This is invisible on your statement but often larger than the tax bill. A $20,000 withdrawal at age 37, assuming a 6% average annual return, represents roughly $100,000 less in your account by retirement age. Even at 47, that same $20,000 costs about $56,000 in forgone growth.
Taxes and penalties are one-time hits. Lost compounding is permanent. Before pulling money from a 401(k), run the numbers on what the withdrawal will cost you at 65, not just what it costs you in April.