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Converting to Roth to Shrink Your Heirs’ Tax Bill (2026)

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What this guide covers

A quick view of the questions and evidence developed below.

The comparison that actually matters
When it works and when it does not
What it does not fix
Sources
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Updated July 28, 2026. Quick answer: The 10-year rule changed who this decision is about. A traditional IRA left to a child is now emptied inside ten years — usually their highest earning decade. Converting at your rate can beat leaving them to empty it at theirs.

The comparison that actually matters

Under the old stretch rules a child could draw an inherited IRA over their lifetime, so the tax was spread thin and the conversion question was mostly about your own retirement. The 10-year rule ended that. The account now empties in a decade that usually lands squarely in their forties and fifties.

Convert now at your rateLeave it, they empty at theirs
You pay, at a rate you can seeThey pay, at a rate you are guessing at
They inherit a Roth — still 10 years, but tax-freeTen years of ordinary income on top of peak salary
Reduces your taxable estate by the tax paidEstate stays larger, heirs’ bill larger

Price the conversion before you make it

A conversion cannot be undone once it is done, so it is worth having someone model the bracket it fills, the knock-on effects on your other income and how long the money has to compound before you settle on an amount.

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When it works and when it does not

It works when your marginal rate is lower than your heirs’ will be — retired, pre-Social-Security, pre-RMD, in a low-tax state. It fails when the reverse is true, or when your heirs are in a low bracket, or when the money is going to charity anyway (a charity pays nothing either way, so converting first simply wastes the tax).

State tax cuts both ways and is often decisive: converting while resident in a no-tax state, when your heirs live in a high-tax one, is the strongest version of this trade. See how each state taxes a conversion — 24 of 51 land where the common shortcut is wrong.

What it does not fix

An inherited Roth is still subject to the 10-year emptying rule. What changes is that the distributions are generally tax-free, so the compressed timeline stops mattering. Converting removes the tax, not the deadline.

Sources

SECURE Act (2019); SECURE 2.0 (2022); final RMD regulations published 19 July 2024; IRC §401(a)(9); IRC §1014 (basis of property acquired from a decedent); IRC §664 (charitable remainder trusts). Cross-checked July 2026 against professional analyses from Kitces, Grant Thornton, Ascensus, Charles Schwab and Kiplinger. Indexed figures and state-specific rules are flagged rather than asserted.

This states what the cited authority says. It is not tax or legal advice, and beneficiary planning turns on family facts and state law that no page can see.

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