Yes, an inherited 401k is generally taxable. Distributions from a traditional inherited 401k count as ordinary income in the year you receive them, taxed at federal rates from 10% to 37% depending on your total taxable income.1Office of the Law Revision Counsel. 26 U.S.C. 402 – Taxability of Beneficiary of Employees Trust A Roth inherited 401k is usually tax-free. The exact bill, and when you must pay it, depends on the account type, your relationship to the person who died, and whether they had already started taking required minimum distributions.
How a Traditional Inherited 401k Is Taxed
The original account holder put pre-tax money into a traditional 401k, and neither the contributions nor the growth were ever taxed. The IRS collects that tax when the money comes out. Every dollar you withdraw as a beneficiary is ordinary income on your federal return for the year you receive it.1Office of the Law Revision Counsel. 26 U.S.C. 402 – Taxability of Beneficiary of Employees Trust
For 2026, federal income tax rates run from 10% on the first $12,400 of taxable income for single filers up to 37% on income above $640,600.2Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 A large distribution can push you into a higher bracket. Say you normally earn $80,000 and take a $100,000 distribution. The combined $180,000 means part of your income is now taxed at 24% or 32% rather than the 22% bracket you would otherwise sit in. Spreading withdrawals across multiple tax years is often the difference between a manageable tax bill and a painful one.
The plan administrator will send you Form 1099-R for any distribution of $10 or more, showing the amount paid and a code identifying it as a death benefit.3Internal Revenue Service. Instructions for Forms 1099-R and 5498 You report the distribution on your federal return using that form.
Roth Inherited 401k
A Roth 401k works the other way. The original owner contributed after-tax dollars, so withdrawals of the contributed principal are always tax-free to you. The earnings are also tax-free as long as the account had been open at least five years before the original owner’s death.4Internal Revenue Service. Retirement Topics – Beneficiary If the account was younger than five years, you owe income tax only on the earnings portion, not on the contributions.
State Income Tax
Many states also tax inherited 401k distributions as ordinary income. Roughly a dozen states have no income tax at all or specifically exempt retirement plan distributions. Check your own state’s treatment before deciding how much to withdraw in a given year.
No 10% Early Withdrawal Penalty
You do not owe the 10% early withdrawal penalty that normally applies to retirement account withdrawals before age 59½. Federal law carves out an exception for distributions made to a beneficiary after the account holder’s death.5Office of the Law Revision Counsel. 26 U.S.C. 72 – Annuities, Certain Proceeds of Endowment and Life Insurance Contracts Your age does not matter. A 30-year-old inheriting a 401k pays income tax on withdrawals but no extra penalty.6Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions
One important boundary: the exemption only holds if the money stays in an inherited account. If a non-spouse beneficiary improperly moves the funds into their own personal IRA, the IRS treats future withdrawals as coming from that person’s own retirement account, and the 10% penalty can apply if they are under 59½.
How Long You Have to Withdraw
The withdrawal timeline drives the tax bill more than anything else. Federal law sorts beneficiaries into categories with different rules.
Surviving Spouse
A surviving spouse has the most flexibility. You can roll the inherited 401k into your own IRA and treat the money as if it had always been yours.4Internal Revenue Service. Retirement Topics – Beneficiary That defers income tax until you start your own required minimum distributions at age 73.7Internal Revenue Service. Retirement Topics – Required Minimum Distributions (RMDs) If you don’t need the money now, the spousal rollover is usually the most tax-efficient choice.
A spouse can also keep the account as an inherited 401k, take distributions based on their own life expectancy, or use the 10-year rule. Keeping it as an inherited account can make sense if you are under 59½ and might need to withdraw funds without worrying about the early-withdrawal penalty that would apply after a rollover into your own IRA.
Eligible Designated Beneficiaries
Certain non-spouse beneficiaries get more favorable stretch treatment. Federal law defines an eligible designated beneficiary as someone in one of these groups:8Office of the Law Revision Counsel. 26 U.S.C. 401 – Qualified Pension, Profit-Sharing, and Stock Bonus Plans
- A minor child of the account holder. The child can take distributions based on their life expectancy until they reach the age of majority; at 21 the 10-year clock starts and the account must be empty within a decade.
- A disabled individual, meaning someone unable to perform substantial gainful activity due to a condition a physician certifies will result in death or be of long, continued, and indefinite duration.
- A chronically ill individual, certified as unable to perform at least two activities of daily living for an extended period.
- An individual not more than 10 years younger than the deceased.
Eligible designated beneficiaries can generally spread distributions over their own life expectancy, which keeps annual taxable income low and stretches the tax bill across many years.
The 10-Year Rule for Everyone Else
Most other individual beneficiaries, including adult children, grandchildren, and non-spouse partners, fall under the 10-year rule created by the SECURE Act for deaths after December 31, 2019. The full account balance must be withdrawn by December 31 of the tenth year after the year of death.4Internal Revenue Service. Retirement Topics – Beneficiary This replaced the old stretch approach.
Whether you must take yearly distributions inside that window depends on when the original owner died:
- If the owner died before their required beginning date, you can take money out on any schedule inside the 10 years. Nothing in years one through nine and everything in year ten is allowed, as is any other pattern.
- If the owner died on or after their required beginning date, you must take annual required minimum distributions in years one through nine based on your life expectancy, then empty the account by the end of year ten.
Taking the entire balance in one year could send a big chunk of it into the top brackets. Splitting the withdrawals across several years, especially years when your other income is lower, generally keeps the total tax bill smaller.
Estates, Charities, and Certain Trusts
When an estate, charity, or certain trusts inherit the 401k rather than a named individual, and the owner died before their required beginning date, the entire balance generally must be distributed within five years.9Internal Revenue Service. Publication 590-B – Distributions from Individual Retirement Arrangements (IRAs) The compressed timeline leaves much less room to manage the tax hit.
Year-of-Death RMD
If the original owner was already taking required minimum distributions and died before finishing that year’s withdrawal, you as beneficiary are responsible for taking the remaining amount by December 31 of that same year.10Internal Revenue Service. Required Minimum Distributions for IRA Beneficiaries That final RMD is taxable income to you, not to the estate.
Penalties for Missing a Required Distribution
Missing a required minimum distribution from an inherited 401k triggers an excise tax of 25% on the amount you should have withdrawn. If you catch the mistake and take the missed distribution within two years, the penalty drops to 10%.11Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs You file Form 5329 with your federal return for the year the missed distribution was due.
The same penalties apply to the final 10-year deadline. Missing the end of year ten means the entire remaining balance is treated as a missed distribution, and the 25% excise tax hits that full amount.
Withholding and the Rollover Trap
When a 401k plan pays a distribution directly to a non-spouse beneficiary rather than transferring it to an inherited IRA, the plan must withhold 20% for federal income taxes.12eCFR. 26 CFR 31.3405(c)-1 – Withholding on Eligible Rollover Distributions Withholding is mandatory even if your actual tax rate ends up lower. You reconcile it on your return and get a refund of any excess.
Non-spouse beneficiaries cannot roll inherited 401k money into their own personal IRA. The only rollover route is a direct trustee-to-trustee transfer into an inherited IRA that stays titled in the deceased’s name for your benefit. If you take a check and try a 60-day indirect rollover, the entire distribution becomes taxable income with no way to reverse it.13Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions A surviving spouse, by contrast, can use either a direct or an indirect rollover into their own IRA.
Estate Tax
The 401k balance is part of the deceased’s taxable estate for federal estate tax purposes, but most estates owe nothing because the 2026 basic exclusion amount is $15,000,000.14Internal Revenue Service. Whats New – Estate and Gift Tax Only the portion of the total estate above that threshold faces the tax.15Office of the Law Revision Counsel. 26 U.S.C. 2010 – Unified Credit Against Estate Tax
If the estate is large enough to owe estate tax, the 401k gets taxed at both levels: estate tax on the balance and income tax on your distributions. Federal law provides a deduction under 26 U.S.C. § 691(c) that lets a beneficiary offset the income tax with the portion of estate tax attributable to the retirement assets.16Office of the Law Revision Counsel. 26 U.S.C. 691 – Recipients of Income in Respect of Decedents Calculating it takes precise numbers from the estate return, so a tax professional is worth the cost at that scale.