401(k) withdrawal penalty: what an early payout really costs in 2026

Three charges, one withdrawal

Every dollar taken from a pre-tax 401(k) before 59½ meets three separate charges. Federal income tax treats it as ordinary income for the year, stacked on wages or any other income. The 10 % additional tax of section 72(t) applies to the part of the distribution that is includible in gross income, so after-tax contributions coming back to you are not penalized (IRS SEPP FAQ, Q&A 1). State income tax, where there is one, comes last. The IRS calls the 10 % an additional tax rather than a penalty, but it lands on the same return and works the same way: no deduction, no bracket, a flat 10 %.

Because the income tax is progressive, the same withdrawal costs very different amounts depending on what else you earn that year. That is the whole difference between the five cases below.

Why the 35-year-old and the 48-year-old pay such different rates

The cash-out at 35 sits on $70,000 of salary, so every dollar is taxed at the 22 % bracket: $4,400 of federal tax plus $2,000 of additional tax on $20,000, which leaves $13,600. The laid-off 48-year-old has no other income. The first $16,100 of the withdrawal falls under the standard deduction, the rest in the 10 % and 12 % brackets, so the federal tax is only $1,420 on $30,000; the 10 % still applies in full, $3,000, because the penalty ignores brackets. For a year with no paycheck, the penalty is often the larger of the two charges.

The 20 % withheld is a deposit, not the bill

An early payout from a 401(k) is usually an eligible rollover distribution, and Publication 575 requires the payer to withhold 20 % when it is paid to you rather than rolled over (IRS Publication 575). That 20 % counts as a payment toward your tax for the year. It is not tuned to your situation. In the table, the 48-year-old gets a $1,580 refund when filing, because 20 % was more than the tax and penalty together; the 42-year-old with a $90,000 salary owes another $6,364, because the withdrawal ran into the 22 % and 24 % brackets and the 10 % came on top.

Publication 575 adds a detail that matters for anyone who changes their mind. The full amount counts as distributed even though only 80 % reaches you. If you roll the money into an IRA or another plan within 60 days, you must replace the withheld 20 % from other funds to roll over the whole amount; any part you do not roll over, withheld tax included, is taxable and, before 59½, owes the 10 %. A direct rollover avoids the withholding altogether.

State tax: from zero to a second penalty

The state line moves the total more than most people expect. On a $40,000 early withdrawal at 45, Illinois taxes nothing, because it subtracts 401(k) payouts at any age ($0). Georgia taxes it in full at its flat rate, $1,996. California treats it as income at its own brackets and adds a 2.5 % early distribution tax of its own, $1,000 on that amount before any income tax. The state comparison covers the eleven states on file.

Where the 10 % does not apply

The rule of 55 is the exception most relevant to early retirement: leave the employer in or after the calendar year you turn 55 (50 for qualified public safety employees) and that employer's plan pays without the 10 %. The 56-year-old in the table shows the effect: same withdrawal and same income as the 53-year-old, but no additional tax, $6,000 saved. Other exceptions cover a 72(t) series of equal payments, disability, a birth or adoption up to $5,000 per child, unreimbursed medical bills above the 7.5 % of adjusted gross income floor, an ex-spouse paid under a court order and several more, each with its own limits; the full list of exceptions sets them side by side.

When a distribution meets an exception but box 7 of Form 1099-R does not show it, the IRS asks you to claim it on Form 5329 (IRS exceptions table). Plans code what they know; a reason they do not know about, such as qualifying medical expenses, is yours to report.

Before taking the money

Two checks change the numbers more than any other. First, which plan: an old 401(k) from a previous job is not covered by the rule of 55 even if you are 56, while the plan of the employer you leave is. Second, which year: a withdrawal in a year with no salary can fall largely in the 0 %, 10 % and 12 % zone, while the same amount in a working year is taxed at the top of your bracket. Splitting a payout across December and January puts it on two returns. The early withdrawal calculator works backwards from the cash you need, and the withdrawal tax page details the brackets.