When a Solo 401(k) account owner passes away, the handling of assets such as mortgage notes (promissory notes) depends on the plan’s beneficiary designation and the surviving spouse’s employment or business situation. Here’s a clear breakdown of what happens next.
Inherited Solo 401(k) for a Surviving Spouse
If the spouse is listed as the beneficiary, the mortgage notes inside the Solo 401(k) become part of her inherited account. Once the beneficiary designation is processed, the plan transitions to the spouse as the new participant.
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If she is self-employed in the same business as the deceased spouse:
The existing Solo 401(k) continues under the same trust and EIN. The mortgage note payments keep flowing into the Solo 401(k). -
If she is self-employed in her own business:
A new Solo 401(k) must be established for her business. The inherited assets, including the mortgage notes, are transferred to the new plan. Payments on the notes would then be directed to her new Solo 401(k).
When the Surviving Spouse Is Not Already a Participant
If the spouse is not already participating in the Solo 401(k):
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If she works in the deceased spouse’s business:
Separate sub-accounts must be created under the existing Solo 401(k) to reflect her participation. -
If she is self-employed in her own business:
She would establish a new Solo 401(k) for that business, and the inherited Solo 401(k) assets would be rolled over.
In either case, she has the option to continue holding the mortgage notes, liquidate them, or take distributions, subject to standard IRS distribution rules and reporting requirements.
If the Surviving Spouse Is Not Self-Employed
If the spouse does not work in the deceased spouse’s business and is not self-employed in her own business, the Solo 401(k) cannot continue. In this case:
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The assets, including the mortgage notes, must be transferred to a self-directed IRA under her name.
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From there, she can continue managing the investments or take distributions following IRS rules.
Key Takeaways
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Spousal beneficiaries have flexibility depending on whether they are self-employed in the same or a new business.
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Mortgage note payments continue uninterrupted into the Solo 401(k) or new plan.
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If no self-employment applies, the account must transfer to a self-directed IRA.
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IRS reporting rules always apply for liquidations and distributions.
Managing inherited Solo 401(k) assets requires careful planning. Whether continuing with a Solo 401(k) or transitioning to a self-directed IRA, understanding the rules ensures compliance and protects the tax-advantaged status of the investments.
