How is a withdrawal from a 401(k) taxed? A withdrawal from a traditional, pre-tax 401(k) is taxed as ordinary income at your marginal federal rate, not at a flat rate, because the money went in before tax and grew tax-deferred. The distribution stacks on top of your other income for the year, so the rate you pay depends on your total taxable income.
A withdrawal from a traditional 401(k) is taxed as ordinary income at your marginal bracket, from 10% to 37% for 2026, not at one fixed percentage (Source: IRS Publication 575, 2025; IRS Rev. Proc. 2025-32). It is taxed because contributions were pre-tax and earnings grew tax-deferred. A 20% federal amount is withheld on distributions paid to you, and a 10% penalty applies before age 59½.
How is a withdrawal from a 401(k) taxed?
A withdrawal from a traditional 401(k) is taxed as ordinary income at your marginal federal rate, the same schedule that applies to wages, not a separate flat rate. The plan reports it on Form 1099-R, you add it to your other income, and your total taxable income determines which 2026 brackets, 10% through 37%, apply (Source: IRS Publication 575, 2025; IRS Rev. Proc. 2025-32).
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Three wrinkles change what you receive and owe: 20% mandatory federal withholding on distributions paid directly to you, a 10% additional tax before age 59½, and tax-free treatment for qualified Roth 401(k) withdrawals. Each is covered below.
Why are 401(k) withdrawals taxed as income?
Traditional 401(k) withdrawals are taxed as income because the contributions were made pre-tax and the earnings grew tax-deferred, so no tax was ever paid on that money. The 401(k) postpones tax rather than eliminating it. When you take the money out, the IRS collects the ordinary income tax that was deferred on both your deferrals and their growth (Source: IRS Publication 575, 2025).
This is the core trade of a traditional account: a deduction now in exchange for taxable withdrawals later. A Roth 401(k) reverses it, taxing contributions up front so qualified withdrawals come out tax-free.
What tax rate do you pay on a 401(k) withdrawal?
You pay your ordinary-income marginal rate on a 401(k) withdrawal, which for 2026 ranges from 10% to 37% depending on your total taxable income (Source: IRS Rev. Proc. 2025-32). Because the U.S. system is progressive, only the dollars that land inside each bracket are taxed at that bracket rate. There is no single 401(k) tax rate.
2026 federal ordinary-income brackets
Your 401(k) withdrawal is taxed at the 2026 ordinary-income rates below, applied to your total taxable income for the year rather than to the withdrawal alone. These marginal brackets run from 10% to 37% (Source: IRS Rev. Proc. 2025-32, released October 2025). Taxable income is what remains after your standard or itemized deductions, and state income tax, where it applies, is calculated separately.
| Rate | Single (taxable income over) | Married filing jointly (over) |
|---|---|---|
| 10% | $0 | $0 |
| 12% | $12,400 | $24,800 |
| 22% | $50,400 | $100,800 |
| 24% | $105,700 | $211,400 |
| 32% | $201,775 | $403,550 |
| 35% | $256,225 | $512,450 |
| 37% | $640,600 | $768,700 |
For 2026, the standard deduction is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for heads of household (Source: IRS Rev. Proc. 2025-32). Because taxable income is figured after deductions, the standard deduction shields the first dollars of a withdrawal from any tax.
Is there a flat 401(k) tax rate?
No, there is no flat 401(k) tax rate. A traditional 401(k) withdrawal is taxed at your marginal bracket, and it stacks on top of Social Security, pensions, IRA distributions, wages, and any other income. A large withdrawal can push part of your income into a higher bracket, but only the dollars that reach that bracket are taxed at the higher rate (Source: IRS Rev. Proc. 2025-32).
The 20% mandatory withholding vs your actual bill
The 20% figure many people cite is withholding, not the tax rate. When a plan pays an eligible rollover distribution directly to you rather than through a trustee-to-trustee transfer, it generally must withhold 20% for federal income tax (Source: IRS Topic no. 413, 2025; 26 CFR 31.3405(c)-1). That 20% is a prepayment credited against your final bill when you file; your actual tax could be higher or lower. A direct rollover to an IRA or another plan avoids the mandatory 20%.
How much tax will I pay? A worked example
How much tax you pay on a 401(k) withdrawal depends on your total income, filing status, and deductions. Consider an illustrative single filer, under age 65, who withdraws $40,000 from a traditional 401(k) in 2026 and has no other taxable income. This shows the ordinary-income mechanics; it is educational, not advice, and your result depends on your full tax picture (Source: IRS Rev. Proc. 2025-32).
- Gross withdrawal: $40,000, all ordinary income (Source: IRS Publication 575, 2025).
- Subtract the 2026 single standard deduction: $16,100.
- Taxable income: $40,000 minus $16,100 = $23,900.
- Apply 2026 single brackets: 10% on the first $12,400 = $1,240; 12% on the remaining $11,500 = $1,380.
- Estimated federal income tax: about $2,620, an effective rate near 6.6% of the withdrawal.
Add real-world income and the picture shifts. If the same person also collects Social Security, the withdrawal raises provisional income and can make more of those benefits taxable, and a pension or IRA distribution would stack on top and could reach the 22% bracket. Your marginal bracket depends on total income (Source: IRS Publication 915, 2025).
At what age can you withdraw from a 401(k) tax-free?
There is no age at which a traditional 401(k) withdrawal becomes tax-free; distributions remain ordinary income at 59½, 65, 73, and beyond (Source: IRS Publication 575, 2025). The ages that matter change the penalty and the timing, not the income tax: 59½ ends the 10% early-withdrawal penalty, and 73 is when required minimum distributions begin for those born 1951 through 1959 (Source: IRS Topic no. 558; IRS RMD FAQs, 2025).
Age 65 is a Medicare milestone, not a 401(k) tax milestone. It does raise your standard deduction: for 2026, taxpayers 65 or older add $2,050 (unmarried) or $1,650 per spouse to the base amount (Source: IRS Rev. Proc. 2025-32, IRC Section 63(f)). A separate temporary senior deduction of $6,000 per eligible person 65 and older applies for tax years 2025 through 2028 under Public Law 119-21, phasing out above $75,000 MAGI (single) or $150,000 (joint) (Source: IRS newsroom, 2025).
How are Roth 401(k) withdrawals taxed?
Qualified Roth 401(k) withdrawals are tax-free, including the earnings, because contributions were already taxed. A distribution is qualified when it is made after a five-taxable-year holding period that begins with your first Roth contribution and after you reach age 59½ (or on death or disability) (Source: IRS designated Roth accounts FAQ, 2025). A non-qualified Roth withdrawal can make the earnings portion taxable.
Since 2024, designated Roth accounts in employer plans, such as a Roth 401(k), are no longer subject to required minimum distributions during the owner’s lifetime under the SECURE 2.0 Act (Source: IRS RMD FAQs, 2025). Some retirees weigh a Roth conversion before RMDs begin to shift future taxable balances; whether it fits, and how much to convert to a Roth, is a factor to weigh with a qualified professional.
The 10% early-withdrawal penalty and the Rule of 55
Before age 59½, most 401(k) withdrawals face a 10% additional tax on the taxable portion, on top of ordinary income tax (Source: IRS Topic no. 558, 2025). Reaching 59½ or qualifying for an exception removes the 10% penalty, but the income tax always applies. The penalty is reported on Form 5329 unless an exception is coded on Form 1099-R.
The Rule of 55 is an exception that lets you take penalty-free distributions from your current employer’s 401(k) if you separate from that employer during or after the year you turn 55 (Source: IRS, exceptions to tax on early distributions, 2025). Other exceptions include qualifying disability and substantially equal periodic payments. In every case the ordinary income tax still applies.
How a 401(k) withdrawal affects Social Security and Medicare
A taxable 401(k) withdrawal counts toward the income tests that govern both Social Security taxation and Medicare premiums, so a large distribution can raise both at once. It increases provisional income, which sets how much of your Social Security benefit is taxed, and modified adjusted gross income (MAGI), which sets your Medicare premium surcharge (Source: IRS Publication 915, 2025; SSA POMS HI 01101.020, 2025).
Up to 50% of Social Security benefits become taxable once provisional income exceeds $25,000 (single) or $32,000 (joint), and up to 85% once it exceeds $34,000 or $44,000; those base amounts are fixed in statute and not indexed for inflation (Source: IRS Publication 915, 2025). Higher MAGI can also trigger the income-related monthly adjustment amount (IRMAA) on Medicare Part B and Part D. For 2026, IRMAA begins above $109,000 (single) or $218,000 (joint) MAGI, using a two-year lookback to 2024, on top of the standard Part B premium of $202.90 per month (Source: SSA POMS HI 01101.020, 2025). A 401(k) withdrawal is not itself net investment income, but it can raise MAGI toward the 3.8% net investment income tax thresholds of $200,000 (single) or $250,000 (joint) (Source: IRS Topic no. 559, 2025).
Do you pay state taxes on 401(k) withdrawals?
Whether you pay state tax on a 401(k) withdrawal depends on where you live, and state treatment is not uniform. Nine states levy no broad income tax at all, and several that do tax income provide full or partial exclusions for retirement-plan distributions, while the rest tax withdrawals as ordinary income (Source: AARP, States With No Income Tax, 2026; Kiplinger, States That Won’t Tax Your Pension, 2026). Federal treatment is the same nationwide; state treatment is not.
State rules and exemption amounts change over time, and where a person lives at the time of the distribution generally governs. A move in retirement can change the state result on the same withdrawal, so current state treatment is a factor to weigh when a large withdrawal is involved.
How can you reduce taxes on 401(k) withdrawals?
Several approaches in the tax code may reduce the lifetime tax on 401(k) withdrawals, and each depends on individual circumstances. Common levers appear in the table below: spreading withdrawals across years, Roth conversions in lower-income years, qualified charitable distributions from an IRA, and coordinating income with the Social Security and Medicare thresholds. These are educational, not recommendations (Source: IRS Publication 575, 2025).
| Strategy | How it can help |
|---|---|
| Spreading withdrawals across years | Keeping annual income within a lower bracket can avoid pushing dollars into the 22% or higher tiers (Source: IRS Rev. Proc. 2025-32). |
| Roth conversions | Converting traditional balances in lower-income years can reduce future RMDs and taxable income; a conversion is itself taxable ordinary income (Source: IRS designated Roth accounts FAQ, 2025). See the Roth conversion break-even and the 2026 conversion deadline. |
| Qualified charitable distributions (QCDs) | IRA owners 70½ or older can send IRA funds directly to charity; the inflation-indexed QCD limit is $108,000 for 2025 and $111,000 for 2026 (Source: IRS Publication 590-B, 2025). QCDs apply to IRAs, not directly to 401(k) plans. |
| Bracket and MAGI management | Coordinating withdrawals with Social Security and Medicare thresholds can limit benefit taxation and IRMAA surcharges (Source: IRS Pub. 915; SSA POMS HI 01101.020, 2025). |
Timing matters because of required minimum distributions. RMDs from traditional 401(k) plans begin at age 73 for those born 1951 through 1959, rising to age 75 for those born in 1960 or later, first applicable for 2035 (Source: IRS RMD FAQs, 2025). Once they start, they force taxable withdrawals whether or not you need the cash, which is why many retirees plan distributions in the penalty-free, pre-RMD window between 59½ and 73. See our RMD 2026 guide for the schedule.
Tax forms you will see for a 401(k) withdrawal
A 401(k) withdrawal generates specific IRS forms that report the distribution, the tax withheld, and any early-distribution penalty. The plan administrator or custodian issues most of these. The three you are most likely to encounter are Form 1099-R, Form 5329, and Form 5498 (Source: IRS instructions for these forms, 2025).
- Form 1099-R reports the gross distribution and any federal income tax withheld.
- Form 5329 reports the 10% additional tax on early distributions, or claims an exception to it.
- Form 5498 reports contributions and, for IRAs, RMD information.
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Frequently asked questions
How do I avoid paying taxes on my 401(k) withdrawal?
You generally cannot avoid tax on traditional 401(k) withdrawals, but the rules allow strategies to reduce it, such as spreading withdrawals across years, Roth conversions in lower-income years, and qualified charitable distributions from an IRA (Source: IRS Publication 575, 2025). Qualified Roth 401(k) withdrawals can be tax-free. These are educational descriptions, not recommendations, and results depend on your situation.
How much tax will I pay on a 401(k) withdrawal?
You pay your marginal ordinary-income rate, from 10% to 37% for 2026, on the withdrawal added to your other taxable income (Source: IRS Rev. Proc. 2025-32). For example, a single filer whose only income is a $40,000 withdrawal owes roughly $2,620 after the $16,100 standard deduction, an effective rate near 6.6%. Your result depends on your full tax picture.
At what age is 401(k) withdrawal tax-free?
A traditional 401(k) is never tax-free based on age alone; distributions stay ordinary income at every age, including after 65 (Source: IRS Publication 575, 2025). Age 59½ only ends the 10% early-withdrawal penalty. A Roth 401(k) can be tax-free once the distribution is qualified, after a five-year holding period and age 59½ (Source: IRS designated Roth accounts FAQ, 2025).
Do you pay taxes on 401(k) after age 65?
Yes. Turning 65 does not exempt 401(k) withdrawals; traditional distributions remain ordinary income (Source: IRS Publication 575, 2025). Age 65 is a Medicare milestone that also raises your standard deduction by $2,050 (unmarried) or $1,650 per spouse for 2026, but the withdrawal itself is still taxed at your marginal rate (Source: IRS Rev. Proc. 2025-32).
How much can I withdraw from my 401(k) without paying taxes?
Roughly up to your standard deduction if you have no other taxable income. For 2026 a single filer under 65 has a $16,100 standard deduction, and a single filer 65 or older has $18,150 ($16,100 plus $2,050); a married couple both 65 or older has $35,500 (Source: IRS Rev. Proc. 2025-32). Other income reduces the amount you can withdraw tax-free.
Is a 401(k) withdrawal taxed as income?
Yes. A traditional 401(k) withdrawal is taxed as ordinary income at your marginal federal rate, the same schedule as wages, because the contributions were pre-tax and the earnings grew tax-deferred (Source: IRS Publication 575, 2025). It is reported on Form 1099-R and added to your total taxable income, which determines your bracket for the year.
Do you pay state taxes on 401(k) withdrawals?
It depends on your state. Nine states have no broad income tax, and several others fully or partly exempt retirement income, while the rest tax 401(k) withdrawals as ordinary income (Source: AARP; Kiplinger, 2026). Federal treatment is uniform; state treatment is not, and where you live at the time of the distribution generally governs.
Sources
IRS Publication 575, Pension and Annuity Income (2025): https://www.irs.gov/publications/p575
IRS Topic no. 558, Additional tax on early distributions: https://www.irs.gov/taxtopics/tc558
IRS Retirement plans FAQs on designated Roth accounts: https://www.irs.gov/retirement-plans/retirement-plans-faqs-on-designated-roth-accounts
IRS Required Minimum Distributions FAQs: https://www.irs.gov/retirement-plans/retirement-plan-and-ira-required-minimum-distributions-faqs
IRS Revenue Procedure 2025-32 (2026 inflation adjustments): https://www.irs.gov/pub/irs-drop/rp-25-32.pdf
IRS Publication 915, Social Security and Equivalent Railroad Retirement Benefits (2025): https://www.irs.gov/publications/p915
SSA POMS HI 01101.020 (2026 Medicare IRMAA): https://secure.ssa.gov/poms.nsf/lnx/0601101020
IRS exceptions to tax on early distributions: https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-exceptions-to-tax-on-early-distributions
IRS Topic no. 413, Rollovers from retirement plans: https://www.irs.gov/taxtopics/tc413
26 CFR 31.3405(c)-1, Withholding on eligible rollover distributions: https://www.ecfr.gov/current/title-26/section-31.3405(c)-1
IRS Publication 590-B, Distributions from IRAs (2025): https://www.irs.gov/publications/p590b
IRS Topic no. 559, Net investment income tax: https://www.irs.gov/taxtopics/tc559
IRS, One Big Beautiful Bill Act (P.L. 119-21): Tax deductions for seniors: https://www.irs.gov/newsroom/one-big-beautiful-bill-act-tax-deductions-for-working-americans-and-seniors
AARP, States With No Income Tax (2026): https://www.aarp.org/money/taxes/states-without-an-income-tax/
Kiplinger, States That Won’t Tax Your Pension (2026): https://www.kiplinger.com/retirement/601819/states-that-wont-tax-your-pension
This article is provided by Q3 Advisors for educational and informational purposes only and is not individualized tax, legal, investment, or financial advice, nor a recommendation to take or refrain from any action. Tax laws and figures change and may not apply to your circumstances. Consult a qualified tax or financial professional before making decisions. Q3 Advisors is a registered investment adviser; registration does not imply a certain level of skill or training. Additional information is available in its Form ADV.
