How are 401k withdrawals taxed? Traditional 401(k) withdrawals are taxed as ordinary income at your marginal rate, while qualified Roth 401(k) withdrawals are federally tax-free. Age, account type, and timing decide the rest.
Key Takeaways
- Traditional 401(k) distributions are treated as ordinary income (IRS Publication 575).
- Qualified Roth 401(k) withdrawals are not included in gross income once you are 59½ and have met the 5-tax-year rule (IRS Publication 575).
- A distribution paid directly to you carries a mandatory 20% federal withholding, even if you plan to roll it over (IRS).
- Withdrawals before age 59½ can trigger a 10% additional tax on top of ordinary income tax (IRS Topic 558).
- The rule of 55 waives that 10% tax if you separate from service in or after the year you turn 55 (IRS Topic 558).
- Required minimum distributions begin at age 73 for those born 1951 to 1959, and 75 for those born 1960 or later (IRS RMD FAQs).
- Employer stock held in a 401(k) can qualify for net unrealized appreciation treatment, taxing the growth at long-term capital gains rates (IRS Publication 575).
A 401(k) is a tax-deferred workplace retirement account, so the tax question is really a “when” question rather than an “if” question. Contributions and growth were sheltered on the way in, so the tax is collected on the way out. This guide covers the federal rules that apply at withdrawal for every age. State income tax is separate and is covered in a companion article below.
401(k) Withdrawals: Key Numbers
Figures for the 2026 tax year, verified against IRS primary sources.
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How are traditional 401(k) withdrawals taxed?
Traditional 401(k) withdrawals are taxed as ordinary income in the year you take them. Because the contributions and growth were never taxed on the way in, the full distribution is added to your taxable income on the way out, according to IRS Publication 575.
That income stacks on top of Social Security, pensions, and any other income, and it is taxed at your marginal bracket. For 2026, the 24% federal bracket runs up to $201,775 for single filers and $403,550 for married couples filing jointly, so a large distribution can push part of your income into a higher bracket.
There is no separate “401(k) tax rate.” The distribution simply flows onto your Form 1040 as ordinary income, the same category as wages. Many retirees manage the timing and size of these withdrawals as part of a broader tax-efficient withdrawal strategy.
Are Roth 401(k) withdrawals taxed?
Qualified Roth 401(k) withdrawals are not taxed at the federal level. Because you already paid tax on Roth contributions, a qualified distribution is excluded from gross income, per IRS Publication 575.
To be qualified, the distribution generally must happen after you reach age 59½ and after a 5-tax-year period of participation that starts with your first Roth contribution to that plan. Miss either test and the earnings portion can become taxable. The full mechanics are in the Roth 401(k) withdrawal rules.
Why is 20% withheld from my 401(k) withdrawal?
A distribution paid directly to you is subject to a mandatory 20% federal withholding. The IRS states that “a retirement plan distribution paid to you is subject to mandatory withholding of 20%, even if you intend to roll it over later.”
That 20% is a prepayment of tax, not the final bill. Your actual tax is settled when you file, so you may owe more or get some back depending on your bracket. The withholding applies to eligible rollover distributions, meaning amounts that could have been rolled into another plan or IRA.
You can sidestep the 20% withholding by using a direct rollover (a trustee-to-trustee transfer) instead of taking the cash yourself. If you do receive the check, you have 60 days to roll it over, but you must replace the withheld 20% from other funds to keep the rollover whole. Retirees often coordinate this with their overall withdrawal sequencing.
How does the 10% early withdrawal tax work before age 59½?
Withdrawals before age 59½ generally face a 10% additional tax on top of ordinary income tax. IRS Topic 558 describes it as “a 10% additional tax on certain early distributions from certain retirement plans” that are includible in gross income.
Several exceptions remove that 10% tax, including total and permanent disability, certain medical expenses, a series of substantially equal periodic payments under Section 72(t), and the rule of 55 described below. The complete list of exceptions is on the IRS early distributions page, and the mechanics are walked through in the 401(k) early withdrawal penalty guide.
What is the rule of 55?
The rule of 55 lets you take penalty-free 401(k) withdrawals if you leave your job in or after the calendar year you turn 55. The IRS waives the 10% additional tax on “distributions made to you after you separated from service with your employer after attainment of age 55.”
The distribution is still taxed as ordinary income; only the 10% penalty is removed. It applies to the plan of the employer you just left, not to old 401(k)s or IRAs, so rolling that balance out first can forfeit the exception. See the rule of 55 explained for the timing details.
When do required minimum distributions start?
Required minimum distributions from a traditional 401(k) begin at age 73 for those born 1951 to 1959, and at age 75 for those born 1960 or later under SECURE 2.0. The IRS RMD FAQs confirm the current age 73 rule.
Each RMD is taxed as ordinary income. Designated Roth accounts in a 401(k) and Roth IRAs are not subject to RMDs during the owner’s lifetime, per the IRS. Because RMDs can force taxable income later in retirement, many households study how RMDs work in 2026 well before the start age.
How is employer stock in a 401(k) taxed?
Employer stock inside a 401(k) can qualify for net unrealized appreciation (NUA) treatment. Under IRS Publication 575, the cost basis of the shares is taxed as ordinary income at distribution, while the appreciation is taxed at long-term capital gains rates when you sell the stock.
NUA requires a lump-sum distribution of the whole account after a triggering event and moves the growth from ordinary-income treatment to capital-gains treatment. It is a narrow, paperwork-heavy election, so the net unrealized appreciation strategy is worth modeling with a professional before you act.
What is the tax treatment for common 401(k) withdrawal scenarios?
The table below summarizes how federal tax applies to the most common 401(k) distribution situations. State tax is separate.
| Scenario | Federal tax treatment |
|---|---|
| Traditional 401(k) withdrawal at age 59½ or older | Ordinary income at your marginal rate |
| Qualified Roth 401(k) withdrawal (59½ and 5-year rule met) | Federally tax-free |
| Traditional withdrawal before 59½ (no exception) | Ordinary income plus 10% additional tax |
| Separation from service in or after the year you turn 55 | Ordinary income, no 10% additional tax (rule of 55) |
| Section 72(t) substantially equal periodic payments | Ordinary income, no 10% additional tax |
| Distribution paid directly to you (eligible rollover) | 20% mandatory withholding; taxable unless rolled over within 60 days |
| Direct rollover to an IRA or another plan | No current tax, no 20% withholding |
| Required minimum distribution at 73 or 75 (traditional) | Ordinary income |
| Employer stock via qualifying lump sum (NUA) | Basis taxed as ordinary income; appreciation at long-term capital gains rates |
Do you pay state tax on 401(k) withdrawals?
State tax is a separate layer on top of these federal rules, and it varies widely. Some states fully tax retirement distributions, some exempt them, and a handful have no income tax at all.
Because the state rules do not track the federal ones, they are covered on their own page: see do you pay state tax on 401(k) withdrawals. If most of your withdrawals happen after 65, the age-specific view is in do you pay taxes on 401(k) withdrawals after 65.
How do Roth conversions fit into 401(k) tax planning?
Roth conversions can reshape how much of your future 401(k) money is taxable. Converting pre-tax 401(k) or IRA balances to Roth means paying ordinary income tax now so that qualified withdrawals later come out federally tax-free and outside the RMD system.
The tax cost of a conversion depends on the same brackets described above, which is why many households look at lower-income windows. Converting during a low-income year can fill up lower brackets at a smaller tax cost, and the fundamentals are explained in what is a Roth conversion. A financial professional can model whether the tradeoff fits a specific situation.
Plan the tax on your retirement income, not just this year
Q3 Advisors is a fee-only RIA focused on Roth conversions and multi-year retirement tax strategy. A professional can model how traditional and Roth 401(k) withdrawals interact with your brackets over time. Learn more at what is a Roth conversion.
Frequently asked questions
Are 401(k) withdrawals taxed as ordinary income or capital gains?
Traditional 401(k) withdrawals are taxed as ordinary income, not capital gains, according to IRS Publication 575. The one exception is net unrealized appreciation on employer stock, where the appreciation can be taxed at long-term capital gains rates.
How much tax is withheld from a 401(k) withdrawal?
A distribution paid directly to you carries a mandatory 20% federal withholding on eligible rollover amounts, per the IRS. That is a prepayment; your final tax is settled when you file, so you may owe more or receive a refund.
At what age can I withdraw from my 401(k) without a penalty?
Generally at age 59½ the 10% additional tax no longer applies. The rule of 55 can also remove it earlier if you separate from service in or after the year you turn 55, though the withdrawal is still taxed as ordinary income.
Are Roth 401(k) withdrawals tax-free?
Qualified Roth 401(k) withdrawals are federally tax-free once you are 59½ and have met the 5-tax-year participation rule, because Roth contributions were already taxed. Non-qualified withdrawals can make the earnings portion taxable.
Do I have to take money out of my 401(k) at a certain age?
Yes. Required minimum distributions from a traditional 401(k) start at age 73 for those born 1951 to 1959 and age 75 for those born 1960 or later. Designated Roth accounts have no lifetime RMD for the owner.
Is the 10% early withdrawal tax on top of income tax?
Yes. The 10% additional tax applies in addition to ordinary income tax on the distribution, unless an exception such as disability, Section 72(t) payments, or the rule of 55 applies.
Does a Roth conversion change how my 401(k) is taxed later?
Converting pre-tax 401(k) balances to Roth means paying ordinary income tax now in exchange for qualified withdrawals that are federally tax-free later and not subject to RMDs. The conversion itself is taxed at your marginal bracket in the year you convert.
Methodology: figures and rules in this article are sourced from primary IRS materials (Publication 575, Topic 558, the IRS rollover and RMD pages) and the 2026 federal brackets. Because 401(k) taxation is a Your-Money-Your-Life topic, anonymous forum anecdotes were deliberately excluded and only primary agency sources were used.
This article is for educational purposes only and is not individualized investment, tax, or legal advice. Consult a qualified professional about your specific situation.
