Can an Inherited IRA Be Converted to a Roth IRA?

For non-spouse beneficiaries: no. A non-spouse beneficiary cannot convert an inherited traditional IRA to an inherited Roth IRA. Per IRC §408A(e) and IRS guidance, Roth conversions are available only to the IRA owner, not to a beneficiary holding an inherited account. For spousal beneficiaries: yes, but indirectly — a surviving spouse can elect to treat the inherited IRA as their own, at which point standard Roth conversion rules apply and the dollars can be converted normally.

Why Non-Spouse Beneficiaries Cannot Convert

The rule comes from IRC §408A(e), which defines a "qualified rollover contribution" to a Roth IRA. The statute specifies that conversions are made by the owner of a traditional IRA, not by a beneficiary. An inherited IRA is legally distinct from an owner-IRA — the beneficiary holds it as a fiduciary-like custodian for distribution purposes, not as the owner.

The IRS has reinforced this in multiple Private Letter Rulings and in the Internal Revenue Manual. The practical effect: a non-spouse beneficiary's inherited traditional IRA must remain a traditional IRA. Distributions taken from it are taxable as ordinary income to the beneficiary. The dollars cannot be moved to a Roth.

The same rule applies to inherited SEP-IRA and inherited SIMPLE-IRA balances when held by a non-spouse beneficiary.

The Spousal Exception

A surviving spouse beneficiary has two options under IRC §408(d)(3)(C):

1. Treat as own IRA. The surviving spouse can elect (or by default, after the deceased's RMD year) to convert the inherited IRA into the surviving spouse's own IRA. After this election, all standard owner-IRA rules apply: no required RMDs from a Roth, normal 5-year rule, normal Roth conversion mechanics. Roth conversions are now allowed.
2. Maintain as inherited IRA. The surviving spouse can keep the inherited IRA designation, which preserves penalty-free access if the spouse is under 59½ (no §72(t) penalty on inherited-IRA distributions). But conversions are not allowed in this status.

The election to treat as own is generally irrevocable. Surviving spouses under 59½ who might need penalty-free access to the funds typically maintain the inherited status until age 59½, then elect to treat as own and proceed with normal owner-IRA strategies including conversions.

Inherited 401(k) — A Different Story

One important distinction: inherited employer-plan accounts (401(k), 403(b), etc.) DO allow non-spouse beneficiaries to do a direct rollover to an inherited Roth IRA, per IRC §402(c)(11) (added by the Pension Protection Act of 2006).

The mechanics: a non-spouse beneficiary of a 401(k) can elect a direct trustee-to-trustee transfer of the deceased's pre-tax 401(k) balance into an inherited Roth IRA. The transfer is taxable as ordinary income to the beneficiary in the year of rollover. After the rollover, the inherited Roth IRA is subject to the SECURE Act 10-year rule (no annual RMDs years 1-9 for Roth, depletion by year 10).

This is the only way a non-spouse beneficiary can get inherited dollars into Roth status. It requires the deceased's plan to allow direct rollovers to inherited Roth IRAs (most large plans do; check the Summary Plan Description). Once the dollars are in the inherited traditional IRA, this rollover-to-Roth path is closed.

For 401(k) beneficiaries considering this: the election is one-time and one-way. Run the math carefully — paying tax now in the beneficiary's marginal bracket vs. paying tax over 10 years of distributions in the same bracket may not be a clear win. The Roth IRA's no-RMD-years-1-9 advantage helps; the upfront tax bill hurts.