06/15/2026
Most people think beneficiary planning is simple. Name someone, move on. It’s not. The account type matters more than most individuals realize.
Here’s a quick breakdown of how different accounts pass to heirs:
1) Taxable Brokerage Accounts
Heirs typically receive a step-up (or potential step-down) in cost basis to the date-of-death value. A $500K account with a $100K original cost basis? The embedded gain essentially disappears. A step-up in cost basis can be a valuable estate-planning consideration, depending on the investor’s situation and current law.
(Source: IRS – Publication 551, Basis of Assets)
2) Roth IRAs
Generally pass income-tax-free to beneficiaries if certain requirements are met (5-year rule). Under the SECURE Act’s 10-year rule, many non-eligible designated beneficiaries must withdraw the account within 10 years; withdrawals are often income-tax-free for qualified Roth IRAs, but exceptions and state tax treatment can vary.
(Source: IRS – Publication 590-B; SECURE Act of 2019)
A Roth left to a high-income beneficiary is a radically different outcome than a traditional IRA.
3) Traditional IRAs & 401(k)s
This is where I see the most planning gaps. Pre-SECURE Act, “stretch IRA” distributions could span a beneficiary’s lifetime. That’s gone for most non-spouse heirs.
Now the rules generally say:
• Non-eligible designated beneficiaries (most adult children) must empty the account within 10 years
• If the original owner died after their required beginning date, annual RMDs are also required during those 10 years, not just a lump sum at year 10
• This can stack significant ordinary income on top of a beneficiary’s existing earnings
(Source: IRS Final RMD Regulations, 2024; SECURE Act of 2019)
The tax exposure here is real. A $1M inherited traditional IRA distributed over 10 years is, in many cases as ordinary income, no capital gains treatment, no step-up in basis.
Coordinating which assets go to which heirs can be an important planning conversation. Understanding these rules can help families make more informed decisions based on their individual goals and objectives.