A client recently came into our Madison Avenue office holding a letter from a financial services company. Her father had passed away, and she was the named beneficiary on his 401(k). She assumed, as many people do, that she could simply roll it into her own account and let it grow for her own retirement decades from now. I had to explain that for most non-spouse beneficiaries, federal law has changed the rules completely. The days of the “stretch IRA”—which allowed for tax-deferred growth over a lifetime—are largely gone.
The money is still yours, but your timeline for dealing with it has been drastically compressed. Stewardship of this asset requires a deliberate and well-informed approach.
The 10-Year Rule Changes Everything
The Setting Every Community Up for Retirement Enhancement (SECURE) Act of 2019 was a major overhaul of retirement account regulations. Its most significant impact for heirs is the creation of the “10-year rule” for most designated beneficiaries. Before this act, a son, daughter, or grandchild could often “stretch” distributions from an inherited IRA or 401(k) over their own life expectancy, allowing the funds to continue growing tax-deferred for decades. It was a powerful tool for generational wealth transfer.
Now, the law mandates that most non-spouse beneficiaries must withdraw the entire balance of the inherited account by December 31st of the 10th year following the original account holder’s death. There are no required minimum distributions (RMDs) during those ten years, but the account must be empty by the deadline. This can create a significant tax event, potentially pushing a beneficiary into a higher income tax bracket in the year they take a large distribution.
The strategy for managing this inheritance is no longer about maximizing tax-deferred growth for 30 or 40 years. It’s now about managing the tax liability over a single decade.
Your Options Depend on Your Beneficiary Status
How you can handle an inherited 401(k) depends entirely on your relationship to the deceased. The law creates three main categories of beneficiaries, each with different rules.
Surviving Spouses
A surviving spouse has the most flexibility. If you inherit a 401(k) from your spouse, you can treat it as your own. This typically involves a spousal rollover into your own IRA. The funds are then subject to the same rules as your own retirement money, meaning you don’t have to take distributions until you reach RMD age yourself. This is often the most prudent path, as it preserves the tax-deferred status and allows the funds to become part of your own retirement legacy.
Eligible Designated Beneficiaries
The SECURE Act carved out a few exceptions to the 10-year rule. These “Eligible Designated Beneficiaries” can still use the old “stretch” method based on their life expectancy. This group is narrowly defined and includes:
- A minor child of the original account owner (though the 10-year clock starts once they reach the age of majority)
- A disabled or chronically ill individual
- Someone who is not more than 10 years younger than the decedent
For these individuals, the possibility of long-term tax deferral remains, but the rules are specific and require careful administration.
Most Other Non-Spouse Beneficiaries
If you are a non-spouse beneficiary—such as an adult child, grandchild, or sibling—who doesn’t fall into one of the exempt categories, you are subject to the 10-year rule. You must empty the account within that decade. The choice becomes strategic: do you take it all at once? Do you withdraw a portion each year to smooth out the tax impact? The right answer depends on your own financial situation, your current and projected income, and your long-term goals.
Why the Beneficiary Form Is So Powerful
In estate planning, we often see wills and trusts get the most attention. But for retirement accounts, the beneficiary designation form is the document that matters. This form is a direct contract with the plan administrator and, in almost all cases, it supersedes whatever is written in a will.
Under New York Estates, Powers and Trusts Law (EPTL) § 13-3.2, retirement assets pass directly to the named beneficiary as a non-probate asset. This means they are not controlled by the will and do not have to pass through Surrogate’s Court. This is efficient—when it works. But when a beneficiary form is outdated, names a deceased person, or worse, names “the estate,” it creates a costly and time-consuming problem. If the estate is the beneficiary, the 401(k) is dragged into probate and is typically subject to an even more accelerated 5-year distribution rule.
An inheritance is a responsibility. When that inheritance is a tax-deferred account, that responsibility includes careful tax and distribution planning. The rules are not intuitive, and a misstep can have significant financial consequences.
The first step is to understand which rules apply to you. If you’ve inherited a 401(k) or other retirement account, we can schedule a consultation to review the beneficiary status and map out a prudent distribution strategy for the next ten years.
