Inherited 401(k) Rules: A Comprehensive Guide
Inheriting a 401(k) is about more than just receiving a financial windfall; it’s stepping into a legacy shaped by years of diligent saving, this opportunity joined by a maze of rules and choices that can feel overwhelming without the right guidance.
Unlike other inherited assets, a 401(k) isn’t simply money that’s yours to spend as you wish. Instead, it’s subject to strict IRS rules, ever-evolving laws, and tax requirements that all depend on your relationship to the original account owner. It’s critical to understand the rules around inherited 401(k)s as the decisions you make thereafter can turn this asset into a lasting financial advantage—or an unexpected tax headache.
SECURE Act impacts on inherited 401(k) planning
The SECURE Act of 2019 fundamentally changed the landscape of inherited retirement accounts. Prior to this, many beneficiaries could stretch required minimum distributions out over their lifetime: allowing inherited accounts to grow tax-deferred for decades, an option that no longer exists for most beneficiaries.
Under current law, most non-spouse beneficiaries must fully distribute inherited 401(k) balances within 10 years of the account owner’s death. While annual distributions aren’t always required in all cases, the account must be emptied by the end of the 10th year—a compressed timeframe shifting inherited 401(k) planning from long-term deferral to proactive tax management.
Inherited 401(k) beneficiary classes
The IRS divides beneficiaries into distinct categories, each one subject to different distribution rules.
Eligible designated beneficiaries (EBDs)
Eligible designated beneficiaries include a surviving spouse, minor child of the account owner, chronically ill or disabled individual, someone less than 10 years younger than the account owner, and some trusts.
Designated beneficiaries (DBs)
Designated beneficiaries are typically adult children, beneficiaries more than 10 years younger than the original account owner, or other individuals who don’t meet the criteria for eligible designated beneficiaries.
Non-designated beneficiaries (NDBs)
This third beneficiary category is for charities, some trusts, and the original account owner’s estate.
These distinctions are important since different rules apply to each group.
Inherited 401(k): concepts to know
Before we get into the specific rules, let’s highlight a few important ideas shaping how inherited 401(k)s work. Understanding these basics will help make everything else much clearer—and help you avoid costly mistakes.
The 10-year rule for inherited 401(k)s
The 10-year rule tasks beneficiaries with withdrawing all funds from the inherited 401(k) within 10 years of the original owner's death. If the account holder passes away in 2026, for example, you have until December 31, 2036 to fully distribute the funds and close the account. While you have the freedom to withdraw any amount at any time during those 10 years, beware that the IRS could hit you with a steep penalty if you fail to empty the account by the deadline—up to 50% of the remaining balance, to be exact.
Inherited 401(k) distributions are sometimes taxable
Withdrawals from an inherited traditional 401(k)s are generally taxable as income, while distributions are typically tax-free if you inherit a Roth 401(k)—so long as the account has been open for at least 5 years. If the Roth 401(k) is younger than this, you won't pay taxes on contributions withdrawn but will owe income tax on any earnings taken out.
Required minimum distributions (RMDs)
RMDs are the minimum amount of money you must withdraw from specific tax-deferred retirement accounts—including 401(k)s—each year beginning at age 73, climbing to age 75 in 2033. These are especially important to understand since inherited 401(k) rules can change depending on whether the original account holder was already taking RMDs or supposed to start.
Life expectancy factors
Finally, RMDs are calculated based on life expectancy factors set by the IRS. Younger spouses who inherit a 401(k) and are allowed to use their own life expectancy for RMDs often benefit from this since their annual withdrawal requirements tend to be much lower than those of their older counterparts.
6 Inherited 401(k) options for surviving spouses
Surviving spouses have the most flexibility when inheriting a 401(k), making spousal planning one of the most nuanced areas of retirement strategy. Surviving spouse options include:
1. Taking a lump-sum withdrawal
This is the simplest way to access inherited funds quickly, though it can potentially push you into a higher tax bracket since you’ll pay income tax on the full amount in the year you withdraw the money—and thus potentially owe more in taxes than you originally anticipated.
2. Rolling over assets into your own 401(k)
You can often roll the inherited 401(k) into your own account whether it’s a new or existing 401(k). Standard 401(k) rules apply, meaning withdrawals before age 59½ typically trigger a 10% early withdrawal penalty. You must then begin taking RMDs as soon as you turn 73 (75 as of 2033).
3. Rolling over assets into your own IRA
This is a popular choice for many surviving spouses. Once the transfer is complete, you treat the account as your own and can therefore make pre-tax contributions, manage investments directly, let your savings grow tax-deferred, and name your own beneficiary. Important note: If you’re under age 59½ and withdraw money from your new IRA, you’ll face a 10% early withdrawal penalty.
4. Leaving the money in your spouse’s 401(k) plan
If your spouse’s employer allows it, you can leave the money in his/her 401(k) and take withdrawals as needed—even if you’re under age 59½—without facing early withdrawal penalties. Keep in mind, though, that you’ll still owe regular income tax on any withdrawals.
Leaving the inherited 401(k) untouched is often a helpful way to avoid immediate financial decisions during a difficult time, but you’ll still need to take required minimum distributions (RMDs) with the timing depending on your age:
If you were under age 59½ when your spouse passed
If your spouse was already taking RMDs and you’re younger than age 59½, you’ll need to continue taking minimum distributions based on your life expectancy. If your spouse wasn’t taking RMDs yet, you’ll be required to take RMDs upon turning 73 (again using your own life expectancy as the basis).
If you were older than age 59½ but younger than 73 when your spouse passed
Here, you can base your RMD schedule on when your spouse would have reached RMD age (if he/she hadn’t already). If your spouse was already taking RMDs, you can choose to continue receiving those payments or wait until you turn 73 to begin receiving your own.
If you were age 73+ when your spouse passed
You’d need to take RMDs.
5. Transferring inherited assets into a new inherited IRA
Alternatively, you can roll the funds into a new inherited IRA—a route especially appealing for younger spouses who might need to access the funds before age 59½ since inherited accounts let you withdraw money early without penalty.
6. Disclaiming the inheritance
A final option is to disclaim the inheritance, doing so (as required) within 9 months of the original owner’s death and thus allowing the assets to pass to a contingency beneficiary, trust, or charity. This option, primarily utilized by those who don’t need the assets nor want the additional income due to potential estate tax consequences, is an irrevocable decision that cannot be reversed.
Inherited 401(k) options for non-spouse beneficiaries
Non-spouse 401(k) beneficiaries (children, grandchildren, siblings, other relatives, or even friends of the original account owner) fall into two categories: eligible designated beneficiaries (EDBs) and designated beneficiaries (DBs).
Options for non-spouse eligible designated beneficiaries (EBDs)
If you’re a non-spouse eligible designated beneficiary—often a minor child or sibling less than 10 years younger than the account owner—you have several options for handling an inherited 401(k). You can take a lump-sum distribution of the entire amount, decline the inheritance, leave the money in the 401(k), or transfer the funds directly into an inherited IRA (which stays in the name of the deceased but provides more investment options than a 401(k)). Consider the following key points if you fall into this category:
Inherited 401(k)s and adults
Eligible designated beneficiaries who are adults can stretch out their inherited 401(k) distributions using their own life expectancy to calculate required minimum distributions (RMDs). This approach allows them to extend withdrawals beyond the typical ten-year period. Here’s how it works…
If the original account owner passed away before reaching RMD age
In this case, you can choose to follow the 10-year rule or take annual distributions over your own life expectancy. For younger beneficiaries, this means smaller withdrawals each year and the potential to stretch distributions over a period longer than 10 years.
If the original account owner passed away after reaching RMD age
If the account owner was already taking RMDs when he/she died, you must take the owner’s RMD for the year the death occurred (if it wasn’t already withdrawn). After that, you continue taking annual distributions based on the original owner’s remaining life expectancy or your own—whichever is longer.
Inherited 401(k)s and minors
Since minors can’t legally own property, they can’t inherit a 401(k) directly. Instead, a custodian (usually the child’s legal guardian) or a trust is appointed to manage the funds until the beneficiary reaches adulthood. When minor children become legal adults—usually between age 18 and 21, depending on state law—they must follow the 10-year rule for withdrawing the remaining funds. If the minor is the child of the account owner, however, he or she can begin withdrawing funds before adulthood (with the 10-year rule kicking in once they reach the age of majority).
Disabled beneficiaries
Beneficiaries are considered “disabled” if they meet criteria outlined in IRC Section 72(m)(7). For a “chronicallyill” designation, the individual must be unable to perform at least two of six activities of daily living—such as eating, bathing, dressing, or transferring—for at least 90 days.
Options for designated beneficiaries (DBs)
Non-spouse 401(k) beneficiaries who don’t qualify as eligible designated beneficiaries—often adult children—generally have four options: 1) take a lump-sum distribution 2) transfer the funds into an inherited IRA (still in the deceased’s name but with more investment options) 3) leave the money in the 401(k) and follow the 10-year rule for withdrawals, or 4) decline the inheritance.
If the original account owner passed away before reaching RMD age
In this case, you can move inherited assets into an inherited IRA and choose how much to withdraw and when—so long as the account is fully depleted within 10 years.
If the original account owner passed away after reaching RMD age
If the original account owner was already taking RMDs at the time of death, you must continue taking the owner’s RMD for years one through nine after his/her passing.
Inherited 401(k) rules for trusts, entities, & charities
A third beneficiary category exists (“non-designated beneficiaries”) for charities, some trusts, and the original account owner’s estate. If you fall under this category, know that the age of the original account owner determines asset distribution.
If the original account owner passed away before reaching RMD age
If the original owner was under age 73, for example, you must completely distribute the assets by December 31st of the fifth year following the original owner's death—commonly referred to as the "5-year rule."
If the original account owner passed away after reaching RMD age
If the original account owner was required to take RMDs at the time of death, then you're generally required to take RMDs based on his/her life expectancy. Furthermore, if the original owner did not take required minimum distributions (RMDs) but was obliged to, an RMD must be taken from the inherited account by December 31 of the year of his/her death.
Inherited 401(k) rules for multiple beneficiaries
If you’re inheriting a 401(k) and aren’t the only beneficiary (a common occurrence especially when siblings are involved), each beneficiary must transfer the respective shares into separate accounts by December 31 of the year following the owner's death—also known as the “separate account” or “separate share” rule. From there, they can follow the rules outlined earlier based on beneficiary category type. A failure to establish separate accounts by the December 31st deadline will result in all beneficiaries needing to take RMDs based on the life expectancy of the beneficiary with the shortest life expectancy (i.e., the oldest beneficiary) beginning the year after the owner's death.
Inheriting a Roth 401(k): a strategic contrast
While inherited 401(k)s are subject to ordinary income tax, inherited Roth IRAs offer a different planning dynamic. Qualified distributions from inherited Roth IRAs are generally tax-free, making them highly valuable assets for beneficiaries. Although most non-spouse beneficiaries are still subject to the 10-year rule, the absence of income tax allows the account to grow tax-free for the entire distribution period: flexibility that often makes Roth IRAs ideal candidates for delayed withdrawals, especially when beneficiaries inherit both traditional and Roth accounts.
In summary: inheritance rules for 401(k) plans
As you can see, inherited 401(k) laws have become pretty complicated over the last few years. It’s thus imperative to partner with a trusted financial advisor who can guide you through options suitable to your own personal financial situation and help you avoid any costly missteps.
Have questions about inherited 401(k) plans? Schedule a FREE discovery call with one of our CFP® professionals to get them answered.
FAQs
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Yes, you’ll get hit with a penalty tax of up to 25% on the amount that should have been withdrawn if you fail to take the missed RMD.
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If you're looking to transfer an inherited 401(k) to a new custodian, simply open an inherited 401(k) or IRA account with the new custodian in your name as the beneficiary. Then, request a direct trustee-to-trustee transfer from your current custodian—making sure to keep the account titled as an inherited IRA so you can continue to enjoy corresponding tax benefits.
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Only spouses can treat an inherited 401(k) as their own, allowing for Roth 401(k) conversions. Non-spouses cannot convert an inherited 401(k) to a Roth.
About the author
The content in this post was developed by our team of writers and reviewed by our team of CFP® professionals here at Vision Retirement.
Retirement Planning | Advice | Investment Management
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Vision Retirement is an independent registered advisor (RIA) firm headquartered in Ridgewood, New Jersey. Launched in 2006 to better help people prepare for retirement and feel more confident in their decision-making, our firm’s mission is to provide clients with clarity and guidance so they can enjoy a comfortable and stress-free retirement. Schedule a no-obligation consultation with one of our financial advisors today!
Disclosures:
This document is a summary only and is not intended to provide specific advice or recommendations for any individual or business.