The Average Inherited 401(k) Is $267,900. The 10-Year Rule Will Cost You Thousands in Taxes.

The Average Inherited 401(k) Is $267,900. The 10-Year Rule Will Cost You Thousands in Taxes. David Beren Wed, July 1, 2026 at 11:49 PM GMT+7 6 min read Quick Read The 10-year rule forces most non-spouse heirs to empty inherited 401(k)s within a decade, adding roughly $26,000 yearly in taxable income on an average account. A $1M inherited 401(k) adds $100,000 in annual taxable income, pushing middle-income heirs into the top bracket for an entire decade. Beneficiaries can slash their tax bill by front-loading distributions in low-income years or rolling the account into an inherited IRA for full timing control. Are you ahead, or behind on retirement? SmartAsset's free tool can match you with a financial advisor in minutes to help you answer that today. Each advisor has been carefully vetted, and must act in your best interests. Don't waste another minute; learn more here. The SECURE Act rewrote how inherited retirement accounts work, and the consequences are now landing on a generation of heirs. For most non-spouse beneficiaries who inherited a 401(k) on or after January 1, 2020, the entire account must be emptied by the end of the tenth year after the original owner's death. The IRS finalized the rules in 2024, and starting in 2025, beneficiaries of accounts whose owners were already taking required minimum distributions must also take annual RMDs. This article walks through how the rule works, what it does to a typical inherited balance, and where the tax math gets uncomfortable. Before the SECURE Act, a non-spouse beneficiary could stretch distributions from an inherited 401(k) or IRA across their own life expectancy, often for decades. That option is gone for most heirs. The 10-year rule replaces it. The account must be at zero by December 31 of the tenth year following the year of death. There is no annual schedule mandated by the statute itself, but the IRS confirmed that if the original owner has already reached their required beginning date, the beneficiary must take annual RMDs in years 1 through 9 and take the remainder in year 10. Are you ahead, or behind on retirement? SmartAsset's free tool can match you with a financial advisor in minutes to help you answer that today. Each advisor has been carefully vetted, and must act in your best interests. Don't waste another minute; learn more here. Five categories of beneficiaries are exempt and can still stretch: surviving spouses, minor children of the decedent (until age 21), disabled or chronically ill individuals, and beneficiaries less than 10 years younger than the original owner. Everyone else, including adult children, siblings, and most grandchildren, is on the 10-year clock. The average Baby Boomer 401(k) balance is 260,300 dollars, according to a recent 2026 retirement analysis. That is the kind of account adult children are now inheriting. Spread evenly over 10 years, that works out to roughly $26,030 per year of additional taxable income on top of whatever the beneficiary already earns. Distributions from a traditional inherited 401(k) are taxed as ordinary income. A beneficiary in their peak earning years, already in the 24% or 32% federal bracket, can lose a meaningful share of the inheritance to taxes simply by accepting the default schedule. Distributions from a traditional inherited 401(k) are taxed as ordinary income. A beneficiary in their peak earning years, already in the 24% or 32% federal bracket, can lose a meaningful share of the inheritance to taxes simply by accepting the default schedule. The squeeze gets tighter for heirs of larger accounts. Fidelity counted 654,000 401(k) millionaires in Q3 2025. A million-dollar inherited balance distributed over a decade adds $100,000 a year of taxable income, which can push a middle-income heir into a higher bracket for the entire 10-year window. A surviving spouse has three options that no other beneficiary has. They can roll the account into their own IRA or 401(k) and treat it as their own. They can remain a beneficiary of the inherited account, in which case required minimum distributions will be based on the age of your deceased spouse. Or they can disclaim the account and let it pass to contingent beneficiaries. The choice usually comes down to age. A younger spouse who needs access without penalty often stays a beneficiary. An older spouse who wants to delay RMDs often rolls it over. The rule was written to raise federal tax revenue, and it does that by compressing tax-deferred growth that used to span generations. Three situations cause the most damage: Heirs in their 40s and 50s who inherit during peak earning years and have no room to absorb extra income. Accounts inherited from a parent who was already taking RMDs, which now require annual distributions in addition to the year-10 cleanout. Large traditional balances inherited alongside other taxable income, where a 10-year drawdown pushes the beneficiary into the top marginal bracket. Three moves change the out

The Average Inherited 401(k) Is $267,900. The 10-Year Rule Will Cost You Thousands in Taxes.

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