In this guide
- Inheritance tax, estate tax and income tax are different things
- Why the income tax cannot simply be avoided
- How to avoid taxes on 401k inheritance: the levers by beneficiary type
- The first 90 days: a beneficiary's checklist
- Surviving spouses: the deferral lever
- Non-spouse heirs: timing the 10-year window
- The inherited Roth options
- The dollars that are not taxable
- Disclaimers: redirecting the account
- Charity, QCDs and the CRT alternative
- Trust as beneficiary: the tax consequences
- What the owner can do before death
Inheritance tax, estate tax and income tax are different things
Most searches for "how to avoid taxes on 401k inheritance" are really asking about three separate taxes, and the answer is different for each. Settling which one you are worried about comes first.
| Tax | Who pays it | Does it hit an inherited 401(k)? |
|---|---|---|
| Federal estate tax | The estate, before anything is distributed | Only if the whole estate exceeds the basic exclusion: $15 million per person for 2026 under Rev. Proc. 2025-32, as set by the 2025 tax act (Pub. L. 119-21). Most estates owe none. |
| State inheritance or estate tax | The heir (inheritance tax) or the estate (estate tax) | Only in the minority of states that levy one, and usually with exemptions for spouses and close relatives. Depends on where the decedent lived, not the heir. |
| Federal and state income tax | The beneficiary, year by year, as money is withdrawn | Yes, from the first dollar of pre-tax money, at the heir's own rates. No threshold, no exemption. This is the tax the rest of this article is about. |
So a $900,000 estate owes no federal estate tax, but if $600,000 of it is a traditional 401(k), the heir still owes income tax on $600,000 as it comes out. The reverse is also true: a $30 million estate pays estate tax, and the heir still owes income tax on the retirement accounts, softened only by the §691(c) deduction described below.
Why the income tax cannot simply be avoided
A taxable brokerage account gets a new cost basis at death under IRC §1014, which can wipe out a lifetime of unrealized gains. A pre-tax 401(k) or IRA does not: §1014(c) excludes it, and under IRC §691 the balance is income in respect of a decedent, income the owner earned but never paid tax on, so the beneficiary pays it instead. The IRS's beneficiary guidance puts it in one line: beneficiaries must include any taxable distributions they receive in gross income.
The tax is built into the asset: a $2 million traditional IRA is worth $2 million less the heir's marginal rate when the money comes out. Every legitimate strategy below works on one of three variables: the rate (whose bracket, which year), the timing (how long the money compounds before tax), or the base (dollars that are not taxable, or that go to someone who does not pay tax). If a pitch claims to eliminate the tax without touching one of those three, be skeptical.
One piece of good news is automatic. The 10% additional tax on early distributions does not apply to distributions made to a beneficiary after the owner's death, at any age, under §72(t)(2)(A)(ii). For how a plan pays out at death, including ERISA's spousal rights, see what happens to your 401(k) when you die.
How to avoid taxes on 401k inheritance: the levers by beneficiary type
Which levers you have depends on who you are to the owner. The distribution rules come from IRC §401(a)(9) and the final regulations issued as T.D. 10001 (July 2024), which apply to distribution years from 2025. The table assumes the owner died in 2020 or later; RBD is the owner's required beginning date, generally April 1 after the year they reached RMD age.
| Beneficiary | Distribution rule | Main tax lever | What to avoid |
|---|---|---|---|
| Surviving spouse | Roll into own IRA; or keep as inherited and use life expectancy; or, if sole beneficiary and the plan allows, elect to be treated as the employee | Longest deferral of anyone; low-income years for Roth conversions | Rolling over before 59½ if cash will be needed (10% penalty returns) |
| Minor child of the owner | Life expectancy until age 21, then 10 years | Small required amounts while the child is in low brackets | Forgetting the clock restarts at 21: empty by the year the child turns 31 |
| Disabled or chronically ill; anyone not more than 10 years younger | Life-expectancy stretch (10-year rule may apply instead if the owner died before RBD and the plan requires or the beneficiary elects it) | Lifetime stretch keeps annual income low | Losing eligible status by missing the documentation deadline |
| Other individual (adult child, grandchild, friend) | Empty by December 31 of year 10; annual RMDs in years 1–9 too if the owner died on or after RBD | Bracket management across the decade | Lump sum in year one; balloon in year ten; any check payable to you |
| See-through trust | Generally follows the rules of the underlying beneficiaries | Distribute out to beneficiaries to use their brackets | Accumulating income at trust rates without a reason |
| Estate or non-see-through trust | 5-year rule if owner died before RBD; owner's remaining life expectancy if after | Limited; usually the costliest outcome | Dying with no beneficiary form, or a stale one |
| Charity | Charity takes the balance | No income tax; charity is exempt | Leaving charity the stepped-up assets and the family the pre-tax account |
The inherited IRA RMD rules walk through which regime applies and how to compute the amounts, and the inherited IRA RMD calculator runs the numbers for a specific account.
The first 90 days: a beneficiary's checklist
Most of the avoidable tax on an inherited 401(k) is lost in the first few months, through paperwork rather than strategy. The deadlines below come from the regulations under §401(a)(9) and §2518; the plan document may impose shorter ones.
| When | What | Why it matters |
|---|---|---|
| Before any money moves | Tell the plan you want a direct trustee-to-trustee transfer, not a distribution. Ask for the after-tax contribution balance and whether the account holds employer stock. | A plan distribution paid to you is an eligible rollover distribution subject to 20% mandatory federal withholding under §3405(c), and a non-spouse beneficiary has no 60-day rollover to undo it: the direct-transfer route in §402(c)(11) is the only one. A check makes the whole amount taxable that year. |
| December 31 of the year of death | If the owner died on or after their RBD and had not taken that year's RMD, the beneficiary takes it. | The year-of-death RMD belongs to the beneficiary and is taxed to the beneficiary. The final regulations add an automatic waiver of the excise tax if it is taken by the beneficiary's tax-filing deadline, including extensions, for that year; treat that as a backstop, not a plan. |
| Nine months after death | Last day to sign and deliver a qualified disclaimer. | §2518(b)(2); the deadline is absolute and the disclaimant must not have accepted benefits first. |
| September 30 of the year after death | The beneficiary determination date under Reg. §1.401(a)(9)-4(c). Any charity or estate sharing the account should be paid out or have disclaimed by then. | Beneficiaries still on the account that day decide which payout regime applies. A charity left in place can push the individuals onto the no-designated-beneficiary rules. |
| October 31 of the year after death | Trustee of a trust beneficiary delivers the trust documentation to the plan administrator or custodian. | Required for see-through treatment under Reg. §1.401(a)(9)-4(h). |
| December 31 of the year after death | Separate inherited accounts established for each beneficiary; first annual RMD due for anyone on a life-expectancy schedule or on the 10-year rule with annual RMDs; the inherited IRA should be titled in the decedent's name for your benefit (for example "Jane Doe, deceased, IRA FBO John Doe, beneficiary"). | Miss the separate-account deadline and every beneficiary is measured by the oldest one's life expectancy. Title it in your own name and the IRS treats it as a taxable distribution plus an excess contribution. |
Two further items before the first withdrawal: locate the owner's last Form 8606 or the plan's record of after-tax contributions, and sketch the heir's expected income for each of the next ten years. Everything in the next sections depends on that sketch.
Surviving spouses: the deferral lever
A spouse is the only beneficiary who can treat the money as their own. Rolling an inherited 401(k) into the spouse's own IRA restarts the clock: no distributions until the spouse's own RMD age, then distributions on the spouse's own life expectancy, with the remainder passing to the next generation under a fresh 10-year window. For a 66-year-old widow whose RMD age is 75, that can mean nine more years of tax-deferred growth and a decade of low-income years in which to convert slices to Roth at rates she chooses.
The one trap is age. Once the money is in the spouse's own IRA, withdrawals before 59½ carry the 10% penalty under §72(t). A younger spouse who may need the cash should keep some or all of it as an inherited account until 59½, where the death exception still applies, and roll it over later; nothing forces the decision in the first year. A spouse who receives a check still has 60 days to roll it over, but the plan will have withheld 20% that must be replaced from other funds. SECURE 2.0 also added an election under §401(a)(9)(B)(iv) for a sole-beneficiary spouse to be treated as the employee for RMD purposes, which can help a spouse younger than the decedent; Reg. §1.401(a)(9)-5(g)(3) makes it a provision a plan may include, so confirm the plan offers it before relying on it.
Non-spouse heirs: timing the 10-year window
For most adult children, the 10-year rule is the whole game. The account must be empty by December 31 of the tenth year after the year of death. If the owner died on or after their required beginning date, Reg. §1.401(a)(9)-5(d)(1) also requires annual RMDs in years one through nine. The IRS excused missed annual amounts for 2021 through 2024 in Notice 2024-35 and its predecessors (Notices 2022-53 and 2023-54); from 2025 they are required. If the owner died before the required beginning date, nothing is required until year ten.
Either way, the beneficiary chooses how much above the minimum to take each year, and that choice sets the rate. The table shows the 2026 federal tax on an extra $120,000 of inherited-account income for a single filer at different levels of other taxable income, using Table 3 of Rev. Proc. 2025-32 (10% to $12,400; 12% to $50,400; 22% to $105,700; 24% to $201,775; 32% to $256,225; 35% to $640,600; 37% above).
| Other taxable income | Federal tax on the extra $120,000 | Effective rate on it |
|---|---|---|
| $40,000 | $26,446 | 22.0% |
| $100,000 | $30,144 | 25.1% |
| $180,000 | $37,971 | 31.6% |
| $400,000 | $42,000 | 35.0% |
| $700,000 | $44,400 | 37.0% |
Worked example (illustrative, 2026 brackets held constant, growth ignored). A single heir with $180,000 of other taxable income inherits a $1.2 million traditional account from a parent who died before the required beginning date. Taking it all in year one adds about $430,800 of federal tax, with roughly $739,000 of it taxed at 37%. Ten level withdrawals of $120,000 cost about $379,700 in total. Leveling saves around $51,000, and that is close to the least favorable case, because this heir already sits in the 24% bracket. If the same heir retires after year four and drops to $40,000 of other income, the same ten $120,000 withdrawals (four in $180,000-income years, six in $40,000-income years) cost about $310,600, a further $69,000 saved simply because the low-income years were known and used.
Decision rules that follow from the table:
- Map the heir's income over the decade first. Sabbaticals, gaps between jobs and early retirement are the cheap years. Fill them deliberately.
- Avoid the year-ten balloon. Deferring everything maximizes tax-deferred growth but hands the full, larger balance to one tax year. Unless year ten is expected to be unusually quiet, it is usually the most expensive schedule.
- Watch the side effects. Retirement distributions are excluded from net investment income under §1411(c)(5), but they raise MAGI, which can push the heir's dividends and gains over the 3.8% surtax threshold. Heirs aged 63 or older should also price the two-year-lagged Medicare surcharge; see how to avoid IRMAA.
- State residence matters. Federal law (4 U.S.C. §114) bars a state from taxing retirement income of a nonresident, so state tax generally follows the beneficiary's residence in the year of the withdrawal, not the decedent's. An heir planning a move to a no-income-tax state can, in principle, push withdrawals past the move; residency rules are state-specific, so confirm first.
If the first beneficiary dies during the window, the successor does not get a new 10 years; the rules are in inheriting an inherited IRA.
The inherited Roth options
An inherited Roth IRA is the one inheritance that is usually tax-free. The owner is always treated as dying before the required beginning date, so a non-spouse beneficiary owes no annual RMDs and simply empties the account by the end of year ten. Earnings are tax-free once the owner's first Roth IRA has been open five years, counting from January 1 of the year of the first contribution. The rational default is to leave it invested until late in the window and spend the pre-tax money first. The detail is in inherited Roth IRA rules.
An inherited 401(k) carries an option an inherited IRA does not. Under Notice 2008-30 and Publication 590-A, a non-spouse designated beneficiary can move pre-tax plan money by direct transfer into an inherited Roth IRA, paying ordinary income tax on the amount moved. This does not avoid tax; it accelerates it. It earns its keep when the heir has an unusually low-income year now, expects higher rates later in the window, or wants the remaining growth to be tax-free. The door closes once the money has reached an inherited traditional IRA, and not every plan will process it. See converting an inherited IRA to a Roth for the mechanics.
The dollars that are not taxable
Three items reduce the taxable base itself, and all three are routinely missed.
- After-tax basis. If the owner made nondeductible IRA contributions (tracked on Form 8606) or after-tax 401(k) contributions, that basis passes to the beneficiary and comes out tax-free. Publication 590-B covers inherited-IRA basis, and the IRS beneficiary page confirms a beneficiary can exclude the deceased employee's investment in the contract. Find the owner's last Form 8606 before the first withdrawal.
- The §691(c) deduction. If federal estate tax was paid, the beneficiary can deduct the estate tax attributable to the IRD as it is received, per Publication 559. With a 2026 basic exclusion of $15 million per person, few estates pay federal estate tax, but for those that do this deduction is real money on a large account, and it is claimed by the heir, not the estate.
- Employer stock. A 401(k) holding appreciated company stock may qualify for net unrealized appreciation treatment after death, converting much of the gain to long-term capital gain on a qualifying lump-sum distribution. It is narrow and must be evaluated before anything is rolled out; see net unrealized appreciation.
Disclaimers: redirecting the account
A beneficiary who does not need the money can refuse it. A qualified disclaimer under IRC §2518 must be in writing, delivered within nine months of the death, and made before the beneficiary accepts the interest or any of its benefits. The account then passes as if the disclaimant had died first, to the contingent beneficiary on the form.
The tax use is to move the IRD to someone in a lower bracket, or to a charity. A surgeon in the 37% bracket named as primary beneficiary of a parent's $800,000 IRA, with her children as contingents, can disclaim all or a fractional share so the money is taxed at her children's rates. Rev. Rul. 2005-36 holds that taking the decedent's year-of-death RMD from an IRA does not by itself prevent a later qualified disclaimer of the rest, though the RMD and the income attributable to it count as accepted. The ruling's facts involve an IRA; for a 401(k) still inside the plan, confirm with the plan administrator and counsel before taking any distribution. Two further cautions: the disclaimant cannot direct where the money goes, so the contingent designation must already say the right thing; and a disclaimer moves the money to the contingent's own distribution rules, which may be less generous.
Charity, QCDs and the CRT alternative
Charity is the only route by which pre-tax retirement dollars escape income tax completely. A public charity named as beneficiary pays no income tax on what it receives, and the bequest qualifies for the estate tax charitable deduction. If a family intends to leave anything to charity, the efficient order is to leave the pre-tax retirement account to charity and the stepped-up brokerage account or the Roth to the children. A $1 million IRA is worth $1 million to the charity and perhaps $630,000 to a 37%-bracket heir; a stepped-up brokerage account is worth close to face value to either.
Beneficiaries can give from an inherited IRA too, but only once they are 70½, and only from an IRA. A QCD from an inherited IRA follows the normal rules, with a 2026 limit of $111,000 per person under Notice 2025-67; the beneficiary's own age is the only age test. QCDs cannot be made from a 401(k), so an older heir who expects to give should move the plan balance to an inherited IRA first.
For owners who want a lifetime income stream for an heir, a charitable remainder trust named as beneficiary is the closest thing left to the pre-2020 stretch. Under IRC §664 the CRT is tax-exempt, so it receives the full pre-tax balance without immediate tax, then pays the heir a fixed annuity or a unitrust percentage (5% to 50%) for life or a term of up to 20 years; each payment is taxed to the heir under the tier rules, ordinary income first. The charity's remainder must be worth at least 10% of what goes in, which limits payouts to young heirs. It suits only families with real charitable intent, and the heir gives up access to principal.
Trust as beneficiary: the tax consequences
Naming a trust changes who pays the tax. A conduit trust must pass every retirement distribution straight out to the beneficiary, who pays at individual rates. An accumulation trust may hold distributions inside the trust, where they are taxed at trust rates that reach 37% at just $16,000 of 2026 taxable income (Rev. Proc. 2025-32, Table 5), against $640,600 for a single individual. The trust's distribution deduction under §§651 and 661 shifts income out when the trustee distributes it, so a trust that is managed for tax distributes whenever it can and accumulates only when creditor, divorce or spendthrift protection justifies the rate.
A trust that fails the see-through requirements in Treas. Reg. §1.401(a)(9)-4 is treated as having no designated beneficiary, which can mean the 5-year rule. And naming a trust instead of the spouse forfeits the spousal rollover. These trade-offs are covered in putting a 401(k) or IRA in a trust; for owners who want control without a separate trust, a trusteed IRA is the alternative.
What the owner can do before death
Most of the tax heirs cannot avoid could have been managed by the owner. Three moves matter most:
- Roth conversions at the owner's rate. If the owner is in the 22% or 24% bracket and the heirs will be in the 32% to 37% range during their peak earning years, converting in the owner's lifetime pays the tax at the lower rate and hands down a tax-free account. Paying the conversion tax from outside assets also shrinks a taxable estate. The Roth conversion guide covers the trade-offs.
- Assign accounts by the heir's bracket. Beneficiary designations need not be pro rata. Pre-tax money to lower-bracket heirs and charity; Roth and taxable assets to high earners. Equalize on an after-tax basis, not on statement values.
- Name contingents on purpose. A disclaimer only works if the contingent beneficiary is the person or charity you would want.
Withdrawal sequencing across both generations is modeled in our calculators, and the wider picture of how distributions are taxed is in retirement withdrawals and taxes. This page is educational; the right answer for a specific estate depends on facts a general article cannot see, so review it with a tax adviser before acting.