A surviving spouse who inherits a 401(k) often sees two rollover destinations that sound interchangeable: a traditional IRA in the spouse’s own name or a qualified plan at the spouse’s current employer. They are not operationally identical. Federal tax law may permit both for an eligible rollover distribution, but the receiving employer plan does not have to accept the money. Its written terms can limit incoming rollovers, the forms it requires, the kinds of money it accepts, and how the balance will be administered after arrival.

That distinction matters because an inherited 401(k) starts inside an employer plan, not an IRA. The plan administrator controls the claim process and must apply the plan document. A custodian’s general webpage about inherited IRAs cannot tell you whether this particular 401(k) permits a lump-sum rollover, installment payments, continued plan participation as a beneficiary, or a direct rollover into another qualified plan. Before choosing a destination, obtain the deceased participant’s distribution packet and the receiving plan’s rollover rules.

Start by identifying what the 401(k) will actually distribute

The first question is not “IRA or new 401(k)?” It is whether the payment is an eligible rollover distribution. Required minimum distributions cannot be rolled over. Certain periodic payments and other statutory exceptions also fall outside the eligible-rollover category. A surviving spouse therefore may need to receive a required amount first and roll only the eligible remainder. Mixing those amounts can create reporting problems that are much harder to unwind later.

When an eligible rollover distribution from a qualified plan is at least $200, the distributing plan generally must provide the rollover notice and facilitate a direct rollover. A direct rollover is usually cleaner than having the check paid to the spouse personally. It avoids the normal mandatory 20% federal withholding that can apply to eligible rollover distributions paid directly to an individual, and it reduces the risk of a missed 60-day deadline.

Option 1: direct rollover to the spouse’s own traditional IRA

For pre-tax 401(k) money, a direct rollover to a traditional IRA can preserve tax deferral without current income inclusion. Once properly rolled into the surviving spouse’s own IRA, the money is governed by IRA rules rather than the deceased participant’s employer-plan procedures. That can simplify future account management, beneficiary updates, investment selection, and consolidation with the spouse’s other traditional IRAs.

An IRA can also provide broader investment choices than some employer plans, although that is a product feature rather than a tax rule. Fees may be lower or higher. Creditor protection can differ by state and by whether assets remain in an ERISA-covered plan, so a person with significant liability exposure should not assume an IRA is automatically the better home. Those legal and cost questions belong in the destination decision, not as an afterthought after the transfer has settled.

If the inherited 401(k) contains designated Roth money, the destination needs separate analysis. A designated Roth account generally can be rolled to a Roth IRA or another designated Roth account that accepts it. Pre-tax and Roth sources should not be casually combined. Ask the distributing plan for a source breakdown and confirm how the receiving institution will record each component before authorizing movement.

Option 2: direct rollover to the spouse’s current employer plan

A spouse may prefer a current employer’s 401(k), 403(b), governmental 457(b), or other eligible plan if that plan accepts the rollover and the funds are eligible for it. The IRS is explicit that a retirement plan is not required to accept rollover contributions. The receiving administrator must be satisfied that the incoming amount is permissible under both federal rules and the plan document.

This is where marketing summaries often omit the most practical constraint. One employer plan may accept a surviving spouse’s direct rollover from a deceased spouse’s 401(k); another may accept ordinary employee rollovers but reject beneficiary-origin money or particular after-tax sources. A plan may also require documentation proving the source and tax character. Do not liquidate or request a check until the receiving administrator confirms acceptance in writing or through its formal rollover process.

Keeping assets in an employer plan can have benefits. Institutional investment pricing may be attractive. ERISA protections can be stronger than state-law IRA protections. Some employees prefer one plan account for administration. On the other hand, plan menus are limited, distribution flexibility may be narrower, and future access depends on the plan’s rules. The choice should therefore reflect the actual receiving plan, not a generic belief that a 401(k) or IRA is always superior.

Plan rules still matter even when the tax code allows a rollover

Federal eligibility is only one gate. The distributing plan must know who the valid beneficiary is and what forms of distribution the plan offers. The receiving plan must permit the incoming rollover. If either plan has incomplete beneficiary records, outstanding domestic-relations issues, or a source that requires special accounting, the transaction can pause while administrators resolve it.

Ask for the deceased participant’s summary plan description and, when necessary, the relevant plan provisions or distribution notice. For the receiving employer plan, ask specifically whether it accepts a surviving spouse’s direct rollover from a deceased participant’s account, whether it accepts pre-tax and designated Roth sources, and what documentation it requires. A general answer that “we accept rollovers” is not specific enough for this transaction.

Do not let an RMD get swept into the rollover

If a distribution year includes a required minimum distribution, that required amount is not an eligible rollover distribution. A plan may calculate and pay it before sending the balance by direct rollover. The surviving spouse should verify that treatment instead of assuming the full account can move untouched. The rule can be especially important when the participant died after reaching the applicable required beginning date or when a beneficiary-distribution rule already applies.

Tax reporting will usually reflect the actual transactions on Form 1099-R. A direct rollover can still generate a tax form even though the rollover itself is not currently taxable. Keep the distribution statement, rollover confirmation, and year-end forms together. If the form appears inconsistent with what actually happened, contact the plan before filing rather than trying to repair the mismatch solely on the tax return.

After-tax contributions need a source-specific decision

Some older 401(k) accounts contain after-tax employee contributions that are not designated Roth contributions. The tax code permits certain rollovers of nontaxable amounts, but the receiving arrangement must be able to account for them correctly. An IRA can accept a rollover of eligible after-tax amounts, while a qualified plan accepting them generally must separately account for taxable and nontaxable portions and the transfer may need to be direct.

Before moving a mixed account, request the plan’s basis information. The gross balance alone is not enough. If part of the account is pre-tax, part designated Roth, and part conventional after-tax basis, each source may have a different appropriate destination. A CPA familiar with retirement-plan distributions can help reconcile the plan’s records with Forms 1099-R and any historical after-tax contribution information.

A practical comparison before signing the distribution form

Compare five items side by side: acceptance, tax character, investments and fees, legal protection, and future distribution flexibility. For acceptance, get confirmation from the receiving plan. For tax character, separate pre-tax, designated Roth, and after-tax sources. For investments and fees, compare actual menus and expense ratios. For legal protection, consider ERISA and state IRA rules. For distributions, look at how easily the spouse can take future withdrawals, name beneficiaries, and administer RMDs.

Also check whether the spouse expects to continue working past the normal RMD age. Employer-plan rules can interact differently with required beginning dates than IRA rules, and the “still-working” exception does not apply to IRAs. Whether that matters depends on the receiving plan and the spouse’s ownership status. It is a reason to model the destination before consolidating, not a reason to choose a new employer plan automatically.

Use a direct rollover when possible

For a straightforward eligible distribution, a trustee-to-trustee or plan-to-plan direct rollover reduces avoidable friction. It keeps the spouse from receiving the money personally, minimizes withholding complications, and avoids reliance on the 60-day rollover window. The check may still be mailed to the spouse in some procedures, but if it is made payable to the receiving trustee for the spouse’s benefit, it can remain a direct rollover.

If money was already paid directly to the spouse, determine immediately whether it is eligible for rollover, what amount was withheld, and when the 60-day period began. Do not assume a late-rollover waiver can make an otherwise ineligible amount eligible. A waiver or self-certification addresses timing in qualifying cases; it does not convert an RMD or other excluded payment into rollover property.

Decision rule: tax permission plus plan permission

The cleanest way to analyze an inherited 401(k) is to use two columns. Column one asks what federal tax law permits for the particular distribution. Column two asks what the distributing and receiving plan documents permit operationally. A transaction works only when both columns line up. That is why the same surviving spouse could validly roll one inherited 401(k) to a new employer plan while another plan balance has to go to an IRA.

Before submitting paperwork, confirm the beneficiary determination, the amount that must be distributed rather than rolled, each account source, the receiving plan’s acceptance policy, and the exact payee instructions for the direct rollover. That small checklist prevents the most common category error: treating a beneficiary claim from an employer plan as though it were merely an IRA-to-IRA transfer.

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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.