Inherited 401(k)s and the 10-Year Rule

If you inherited a 401(k) from someone who died on or after January 1, 2020, and you are not an "eligible designated beneficiary," you must withdraw every dollar within 10 years of the end of the year of death. And if the original owner had already reached their required beginning date for RMDs, you must also take annual RMDs during years 1 through 9, not just empty the account by year 10.

Who Falls Under the 10-Year Rule

Before the SECURE Act, most non-spouse beneficiaries could "stretch" inherited withdrawals over their own life expectancy. Deaths on or after January 1, 2020 trigger the 10-year rule instead.

Eligible designated beneficiaries still get the lifetime-stretch treatment: the surviving spouse, minor children of the deceased (until the age of majority), disabled or chronically ill individuals, and beneficiaries not more than 10 years younger than the deceased. Everyone else, including adult children, siblings, and most trusts, falls under the 10-year rule.

The Annual RMD Requirement Nobody Warned You About

IRS proposed regulations under Reg 1.401(a)(9)-5 ended the assumption that you could simply wait and take one large year-10 distribution. The required beginning date is generally April 1 of the year after turning 73 under current law; if the owner died before that date, no annual RMDs are required, though the 10-year deadline still applies.

The IRS waived penalties for missed annual RMDs from 2021 through 2024 while the rules were being clarified. That waiver has ended. A missed RMD now carries a 25% excise tax on the amount that should have been withdrawn (reduced to 10% if corrected promptly under the SECURE 2.0 correction window).

The Real Decision: Front-Load or Back-Load Withdrawals

If the owner died before their required beginning date, the planning question is when to take the money, and the right answer depends on your income trajectory. Two scenarios with the same $400,000 inherited 401(k):

Scenario A: The beneficiary is 45, earning $180,000, but plans to leave full-time work at 52. Waiting for the lower-income years can save tens of thousands in federal tax.

Scenario B: The beneficiary is 58, at peak salary, expecting similar income through retirement at 65. Year 10 lands in their highest-earning years, so spreading distributions evenly, or front-loading into any year where income dips, beats one enormous taxable event.

The principle: fill the lowest-tax years within the window first, without triggering Medicare premium surcharges (IRMAA thresholds) or pushing capital gains into a higher bracket.

How This Connects to the 401(k) Rollover Pillar

Inherited 401(k)s are sometimes eligible to be rolled into an inherited IRA, which can offer more investment flexibility and control over withdrawal timing; the rules are narrow and plan-dependent. The broader context on 401(k) transfers is in 401(k) Rollover: A Complete Guide to Moving an Old Retirement Account. Structuring the 10-year window for the least tax drag lives in the Harvest stage of the Sporos Doctrine.

Frequently Asked Questions

Does the 10-year rule apply to 401(k)s inherited before 2020?

No. If the original account owner died before January 1, 2020, the old stretch rules apply to you.

Can a spouse who inherits a 401(k) avoid the 10-year rule?

Yes. A surviving spouse can roll the account into their own IRA or 401(k) (usually the most favorable), treat it as an inherited IRA with life-expectancy distributions, or elect the 10-year rule.

What happens if I miss the year-10 deadline?

The full remaining balance becomes a taxable distribution, with no mechanism to extend the deadline. The excise tax applies to annual RMDs missed during years 1 through 9 when required, not to the year-10 balance itself.

Does the 10-year rule apply to Roth 401(k)s?

Yes, the same timeline applies. Qualified distributions from an inherited Roth account are income-tax-free, which removes the bracket-management pressure, not the deadline.

What to Do Next

What decides this for you. Whether the person you inherited from had already reached their required beginning date. If they had, you owe annual distributions during the 10-year window as well as emptying the account by the end of it. If they had not, the annual requirement does not apply and only the deadline does.

Where it goes wrong. The 10-year rule reads like permission to wait, so people wait, and then take the entire balance in year 10. That stacks an inherited account on top of a full year of their own income, often during peak earning years, and pushes the whole thing through the top brackets in a single filing. The other failure is quieter: missing the annual distribution inside the window when it was required, which carries a penalty on the amount that should have come out. Both are avoidable, and both are decided in year one, not year 10.

Worth a conversation if you inherited an account and are still working, your income varies year to year, or there are multiple beneficiaries with different tax situations. The right schedule is built around your income across a decade, not around the deadline. Book a call.

The information provided is for educational purposes only and does not constitute investment, legal, or tax advice. Tax law changes frequently — verify current rules before acting. Consult with qualified professionals for guidance specific to your situation.