Inherit a Parent’s $240,000 401(k) at 59 and Plan to Spread It Over Ten Years, and the Plan May Only Offer a Lump Sum, All Taxable in One Year. One Form Moves It to an Inherited IRA First

When a parent dies and leaves a 401(k) to an adult child, the heir faces two sets of rules. Federal tax law gives most non-spouse heirs a decade to empty the account. The employer plan’s own document can be much stricter. For a 59-year-old who inherits $240,000, the gap between those two frameworks can add up to five figures in extra taxes. This article covers what the plan can require, what a ten-year spread looks like in practice, and which transfer request keeps the longer timeline intact.

What Federal Law Allows Versus What the Plan Offers

Since the SECURE Act, most non-spouse heirs must empty an inherited retirement account within 10 years. Heirs of owners who died after December 31, 2019 “have a 10-year maximum to withdraw the money that is in the retirement account” and can no longer use the stretch IRA.

That ten-year window is the outer limit under tax law. Each employer plan sets its own payout menu. Some plans let beneficiaries leave inherited assets in place, but every plan works differently. When a plan offers a lump sum as the only option for a non-spouse heir, the ten-year window disappears unless the heir moves the money elsewhere first.

What a One-Year Payout Costs at 59

Consider a single filer with $60,000 of taxable income. Under 2025 single-filer brackets, federal tax on that income is $8,114. Add the full inheritance in one year and taxable income climbs to $300,000. The total owed rises to about $74,547, with the top slice falling in the 35% bracket, which begins at $250,526.

That works out to roughly $66,433 in added federal tax from the inheritance alone, all due in one year. At 59, the heir is technically under 59½, but the 10% early-withdrawal penalty never applies to beneficiaries inheriting a plan, regardless of payout timing.

Spread the same $240,000 evenly over ten years instead. Each annual withdrawal is $24,000, bringing taxable income to $84,000. That amount stays inside the 22% bracket, which runs to $103,350 in 2025. Over the full decade, added federal tax comes to about $52,800, roughly $13,633 less than the lump sum.

The example excludes investment growth, state taxes, deductions, and uses 2025 brackets. For 2026, the 22% bracket extends to $105,700 for single filers, so the spread strategy becomes marginally more attractive for heirs acting this year.

One Form Keeps the Ten-Year Window Open

The solution is a direct rollover, also called a trustee-to-trustee transfer, into an inherited IRA. Federal rules require qualified plans to allow non-spouse beneficiaries this transfer even when the plan itself offers only a cash payout. The heir opens an inherited IRA at a brokerage, titled in the deceased parent’s name for the heir’s benefit, then submits the plan’s distribution election requesting a direct rollover to that custodian rather than a check.

Sequencing matters here. For non-spouse heirs, inherited IRAs must be funded by direct trustee-to-trustee transfer. A surviving spouse who receives a check can still deposit it within 60 days. A non-spouse heir has no such option. Once the plan issues a payment, the full balance becomes taxable income for that year, and no rollover can undo it.

Ten Years Comes With Annual Minimums

Many heirs assume they can withdraw money on any schedule during the decade, but that depends on whether the parent had already started required minimum distributions. When the parent had already reached the required beginning date, the heir must take annual RMDs starting the year after the owner died, then clear whatever remains by December 31 of the 10th year.

IRS final regulations issued in July 2024, and effective for distribution years starting in 2025, settled years of ambiguity on this point: annual RMDs in years 1 through 9 are required when the original owner died on or after their required beginning date. Missing those annual distributions carries a 25% excise tax on the amount that should have been withdrawn, reduced to 10% if corrected within two years. Under SECURE 2.0, the required beginning date is age 73 for those born between 1951 and 1959, and age 75 for those born in 1960 or later. The parent of a 59-year-old is typically in their 80s or older, which puts most of them well past the applicable threshold.

Waiting until the final year recreates the same problem as a lump sum. Personal finance author Suze Orman warned that “if you have to draw out a large lump sum in the 10th year, you’re going to be hit by big time taxes.” The inherited IRA rule is one of several that quietly drain retirement accounts, and we mapped out the rest in a free guide to the IRS traps retirees most often miss.

Steps That Protect the Ten-Year Spread

1. Request the plan’s beneficiary options in writing before signing anything. Ask specifically for the direct rollover election form for a non-spouse beneficiary.
2. Open the inherited IRA first. Make sure the title includes the parent’s name, then have the plan send the money straight to that custodian.
3. Plan withdrawals around the brackets. Set each year’s withdrawal at or above the required minimum, sized so taxable income stays below the 24% bracket, which starts at $103,351 for single filers in 2025 and at $105,701 in 2026.

For the plan administrator, a lump-sum-only policy is easier to manage. For the heir, it can mean paying tax in the 35% bracket rather than the 22% bracket. The direct rollover form determines which of those outcomes applies, and the election must be made before the plan disburses anything.

Editor’s note: This update adds the IRS July 2024 final regulations (effective 2025) requiring annual RMDs in years 1 through 9 for heirs whose parent had already started distributions, along with the 25% missed-RMD excise tax and the SECURE 2.0 required-beginning-date ages of 73 (born 1951-1959) and 75 (born 1960 or later). The 2026 single-filer 22% bracket threshold of $105,700 was also added as current-year context.

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