Free Guide to 401(k) Inheritance Tax Considerations

Understanding 401(k) Inheritance Basics

When someone passes away with money in a 401(k) account, that account doesn't simply disappear. The funds become part of their estate and are distributed to the people or organizations named as beneficiaries. Understanding how this process works is important for both people who have 401(k) accounts and those who may inherit them.

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A 401(k) is a retirement savings plan offered by employers. Workers contribute money from their paychecks before taxes are taken out, and the money grows over time. When a person passes away, the balance in their 401(k) account—whatever remains—goes to whoever they named as their beneficiary. This is different from other assets that go through a legal process called probate. Because of the way 401(k) beneficiary designations work, the money can move to heirs relatively quickly, sometimes within weeks.

The person named as beneficiary is critical. If someone had a spouse, they might name their spouse. If they had children, they might name them. Some people name multiple beneficiaries. If no beneficiary was ever named, state laws determine who receives the money, which can create delays and complications. According to LIMRA, an insurance and financial services research organization, about 40% of Americans don't have current beneficiary designations on their retirement accounts, which can lead to unintended consequences for their families.

The tax situation for inherited 401(k) accounts is complex and varies depending on who inherits the account and when the original account owner died. This complexity is why understanding the rules matters. Someone who inherits a 401(k) might owe taxes on withdrawals, might be required to take money out on a specific schedule, or might have other obligations depending on their relationship to the deceased.

Practical takeaway: If you have a 401(k), review your beneficiary designation with your plan administrator to make sure it reflects your current wishes. If you're inheriting a 401(k), learn what type of beneficiary you are—spouse, child, other relative, or non-relative—because this determines your options and tax obligations.

Tax Implications When a Spouse Inherits a 401(k)

When a surviving spouse inherits a 401(k), they generally have more options than other heirs. The law recognizes the special status of spouses and gives them choices that can help them manage taxes and access to funds. These options are important because they directly affect how much money the spouse will owe in taxes and when they must take money out.

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A spouse can choose to treat the inherited 401(k) as their own. This means the spouse can roll the account into their own 401(k) or IRA. If they do this, they don't have to start taking money out until they reach age 73 (as of 2023, based on the SECURE 2.0 Act). This option is valuable because it delays taxes and allows the money to keep growing. If the surviving spouse is younger and not yet retired, rolling the account into their own retirement plan can be a smart choice because it extends the time before they must withdraw funds.

Alternatively, a spouse can keep the 401(k) as an inherited account. Under the SECURE Act passed in 2019, most non-spouse beneficiaries must withdraw all funds within 10 years. Spouses have different rules—they can delay withdrawals longer if they wish, or they can take money as needed.

The tax treatment depends on whether the original account holder had begun taking required minimum distributions (RMDs) before they died. Required minimum distributions are amounts the law requires people to withdraw starting at age 73. If the account holder had started RMDs, the spouse must continue taking them. If the account holder hadn't started RMDs, the spouse has more flexibility.

According to the IRS, the tax on inherited 401(k) withdrawals is treated as ordinary income. This means if a surviving spouse withdraws $50,000 from an inherited 401(k) in one year, that $50,000 is added to their other income for the year and taxed at their normal tax rate. For someone in a higher tax bracket, this could create a significant tax bill. This is why some spouses choose to spread withdrawals over several years to keep their annual income lower.

Practical takeaway: If you're a surviving spouse inheriting a 401(k), understand your rollover options and timing before deciding how to handle the account. Consider speaking with a financial or tax advisor about whether rolling it into your own retirement plan or keeping it as an inherited account makes more sense for your situation.

Tax Responsibilities for Non-Spouse Beneficiaries

Non-spouse beneficiaries—adult children, grandchildren, siblings, or other relatives—face different rules than spouses when they inherit a 401(k). These rules changed significantly under the SECURE Act of 2019, which created new requirements about how quickly inherited money must be withdrawn and taxed.

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Under the SECURE Act, most non-spouse beneficiaries must withdraw all funds from an inherited 401(k) within 10 years following the year the account owner dies. This is sometimes called the "10-year rule." For example, if someone dies in 2024, their non-spouse beneficiary typically must empty the inherited 401(k) by December 31, 2034. The law doesn't require equal annual withdrawals—beneficiaries can take the money out as they wish during that 10-year window, as long as the account is completely empty by the deadline.

However, there are exceptions to the 10-year rule. Certain people are called "eligible designated beneficiaries" and have more time. These include:

• The surviving spouse (already discussed)
• Children of the account owner who are minors (but only until they reach the age of majority)
• People who are disabled or chronically ill (as defined by the IRS)
• Beneficiaries who are not more than 10 years younger than the account owner

For example, if a 55-year-old passes away and leaves their 401(k) to their 30-year-old child, that 30-year-old is not an eligible designated beneficiary and must follow the 10-year rule. But if that same 55-year-old had a 50-year-old sibling as a beneficiary, the sibling would qualify as an eligible designated beneficiary and could have different (usually more favorable) options.

All withdrawals from an inherited 401(k) by non-spouse beneficiaries are taxed as ordinary income. There's no special tax treatment or lower tax rate for inherited retirement money. This means a large withdrawal in a single year could push a beneficiary into a higher tax bracket and result in a bigger tax bill. Some beneficiaries try to spread withdrawals across multiple years to minimize the tax impact. In 2024, the IRS allows people to withdraw up to $23,500 per year before reaching the 37% top tax bracket (depending on filing status), so spreading withdrawals can matter.

Practical takeaway: If you inherit a 401(k) as a non-spouse beneficiary, determine whether you're an eligible designated beneficiary, understand the 10-year withdrawal deadline, and consider a withdrawal strategy that spreads money out over time to reduce your annual tax burden.

Required Minimum Distributions and Inherited Accounts

Required minimum distributions (RMDs) are amounts that federal tax law requires people to withdraw from retirement accounts each year once they reach a certain age. These rules apply to inherited 401(k)s in specific ways that can create additional tax obligations for beneficiaries.

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As of 2023, people must begin taking RMDs from their own 401(k)s at age 73 (this age was raised from 72 under the SECURE 2.0 Act). For inherited accounts, the rules depend on whether the original account holder had begun RMDs before death and on the type of beneficiary.

If the account owner died before beginning RMDs, non-spouse beneficiaries must drain the account within 10 years as described above, but they don't face annual RMD requirements during those 10 years. They can take money whenever they want, as long as everything is gone by year 10. This gives flexibility.

If the account owner had begun RMDs before