A Roth 401(k) and a Roth IRA both use after-tax contributions and can produce tax-free qualified distributions, but they are not the same account. A spouse who inherits a designated Roth account inside a 401(k) should identify the plan’s distribution rules, the Roth qualification period, beneficiary RMD obligations, and the destination of any rollover before choosing a path.

One outdated distinction should be removed immediately: beginning in 2024, designated Roth accounts in 401(k) and 403(b) plans are no longer subject to lifetime RMDs while the participant is alive. Roth IRAs also have no lifetime RMD for the owner. After death, however, beneficiaries of both Roth IRAs and designated Roth accounts are subject to post-death distribution rules.

A Roth 401(k) is still part of an employer plan

A designated Roth account is a separately accounted portion of a 401(k), 403(b), or governmental 457(b) plan. The plan document controls available investments and distribution procedures. When the participant dies, the surviving spouse usually deals with the plan administrator before any IRA custodian becomes involved.

That employer-plan layer can limit timing or available forms of payment. The spouse should obtain the beneficiary claim package and the plan’s section 402(f) rollover notice. Ask whether the spouse may leave the designated Roth balance in the plan as a beneficiary, take installments, roll it to a Roth IRA, or roll it to the spouse’s own employer plan if that plan has a designated Roth account and accepts the incoming money.

The five-year qualification period is not interchangeable across account types

A qualified distribution from a designated Roth account generally requires a five-taxable-year period of participation plus a qualifying event such as attainment of age 59½, disability, or death. For a distribution to a beneficiary, the deceased participant’s age, death, or disability is used to determine the qualifying event. The plan’s five-year clock begins with the participant’s first designated Roth contribution to that plan, subject to rollover rules.

A Roth IRA has its own five-tax-year framework. Rolling a designated Roth account to a Roth IRA does not simply carry every year of plan participation over as though it were a contribution to that Roth IRA. IRS guidance provides special ordering and qualification rules. A spouse with an older Roth IRA may have a more favorable established Roth IRA five-year history than a spouse opening the first Roth IRA only after the death.

Rolling to the spouse’s own Roth IRA can simplify future ownership

A surviving spouse can often roll an eligible designated Roth distribution to a Roth IRA. Once validly held in the spouse’s own Roth IRA, the spouse becomes the owner of that account. Roth IRA owners do not take lifetime RMDs. The spouse can also set a new beneficiary designation for the account.

But the rollover destination affects later distribution qualification. If the spouse has never had a Roth IRA, ask the tax adviser how the Roth IRA five-year period applies to earnings after the transfer. Do not assume that five years in the deceased participant’s Roth 401(k) automatically means every future withdrawal from the spouse’s newly opened Roth IRA is qualified.

Rolling to the spouse’s own employer designated Roth account is different

If the spouse’s current employer plan accepts the rollover, a designated Roth amount may be moved to a designated Roth account in that plan when the statutory requirements are met. The IRS explains that when a surviving spouse rolls to the spouse’s own employer designated Roth account, the spouse’s own age, death, or disability becomes relevant to whether later distributions are qualified.

The receiving plan’s five-year period also has specific carryover rules for direct rollovers between designated Roth accounts. The earlier period from the distributing plan can count in determining the recipient plan’s period when the requirements are satisfied. This is one reason to obtain the deceased participant’s Roth contribution history and not rely solely on the current balance.

Beneficiary RMDs still apply before owner treatment changes the account

The SECURE Act and final RMD regulations govern post-death distributions. A surviving spouse is an eligible designated beneficiary and can have special options, but a Roth label does not mean “no distribution rules after death.” The IRS RMD page expressly says beneficiaries of Roth IRAs and designated Roth accounts are subject to RMD rules.

If the spouse keeps the Roth 401(k) in beneficiary status, the plan administrator should explain the applicable distribution schedule under the final regulations and plan terms. If the spouse rolls eligible assets to an own Roth IRA, the spouse’s subsequent account is generally no longer an inherited account. Any amount that is itself a required distribution cannot be rolled.

Taxes can arise from earnings if the distribution is not qualified

Designated Roth contributions were taxed when contributed, so those contributions are not taxed again. Earnings can be taxable when a distribution is not qualified. The plan must separately account for contributions and earnings, which is why the Form 1099-R and plan source records matter.

A surviving spouse should not infer tax-free treatment solely from the word “Roth.” Confirm whether the deceased participant satisfied the five-taxable-year requirement and whether the distribution qualifies because of death. If money is moved rather than withdrawn, confirm that the transaction is an eligible direct rollover and that the receiving account is permitted to accept it.

Required distributions and rollover amounts should be separated

If a beneficiary RMD is due for the year, it is not an eligible rollover distribution. The plan may pay the required amount to the spouse and roll the remaining eligible balance. Keeping these as separate transactions makes the tax reporting easier to follow and avoids the common error of rolling an RMD into a Roth IRA.

For a Roth account, an RMD can be income-tax-free if it is a qualified distribution, but “tax-free” does not make it rollover-eligible. RMD eligibility and income inclusion are different questions. The spouse should verify both rather than treating them as synonyms.

Do not overlook pre-tax money elsewhere in the same 401(k)

Many participants have both traditional pre-tax and designated Roth sources in the same employer plan. The beneficiary statement may show one total balance even though the plan separately accounts for them. Those sources can have different rollover destinations and tax treatment.

Request a source-level breakdown before filing the beneficiary election. A spouse might direct the designated Roth source to a Roth IRA and the pre-tax source to a traditional IRA. If the spouse instead takes a cash distribution, the tax and withholding consequences can differ. One account number does not mean one tax character.

A direct rollover usually preserves the cleanest record

For eligible amounts, a direct rollover from the plan to the receiving Roth IRA or designated Roth account avoids having the spouse take possession of the money and reduces 60-day rollover risk. It also gives the receiving institution evidence of the source. The distribution still may be reported on Form 1099-R, so retain the rollover confirmation.

If a check is already payable to the spouse, contact the plan and intended receiving institution immediately. Determine the gross distribution, withholding, eligible amount, and deadline. Do not rely on the fact that the assets are Roth to assume a late redeposit has no consequences.

Compare the destination before moving the Roth balance

For a Roth IRA destination, examine the spouse’s existing Roth IRA history, fees, investments, creditor protection, and beneficiary plan. For an employer designated Roth destination, verify that the plan accepts the rollover, how it recognizes the five-year period, what investments are available, and what distribution restrictions apply.

For leaving the money in the inherited plan, compare beneficiary distribution options and administrative costs. The best destination can depend on whether the spouse needs withdrawals soon, has an established Roth IRA, wants consolidated plan assets, or values particular legal protections. “Roth to Roth” describes the tax color, not the entire decision.

Employer matching money may not be Roth even when the statement says “Roth 401(k)”

Historically, employer matching contributions were generally held in a pre-tax source even when the employee made Roth deferrals. SECURE 2.0 created options for certain vested employer contributions to be treated as Roth, but plan implementation varies. A surviving spouse should therefore request source-level records instead of assuming the entire account has Roth tax character.

A mixed plan can require separate destinations: designated Roth assets may go to a Roth IRA, while pre-tax assets may go to a traditional IRA if the spouse wants to preserve deferral. The plan administrator’s source breakdown is more reliable than a shorthand account nickname on a benefits portal. Confirm each source before authorizing a single combined distribution.

Related Guides

This is general information, not personalized tax or legal advice — a CPA or estate attorney can confirm how this applies to your specific inherited account.