Solo 401(k) plans offer powerful flexibility for self-employed individuals—including the ability to take participant loans. However, when loan rules are not followed precisely, the tax consequences can be significant. Two commonly misunderstood outcomes are deemed distributions and loan offsets.
Although they may sound similar, these two events are treated very differently under IRS rules. Understanding the distinction is critical for avoiding unexpected taxes, penalties, and lost rollover opportunities.
What Is a Solo 401(k) Deemed Distribution?
A deemed distribution occurs when a participant loan fails to meet one or more IRS loan requirements. When this happens, the IRS treats part or all of the loan as a taxable distribution—even though the loan technically remains outstanding within the solo 401k plan.
Common Causes of a Deemed Distribution
A deemed distribution can occur if any of the following rules are violated:
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No legally enforceable loan agreement
The loan must be documented, typically with a promissory note and an amortization schedule. -
Loan exceeds IRS limits
Solo 401(k) loans are limited to the lesser of:-
$50,000, or
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50% of the participant’s vested account balance.
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Loan term exceeds the maximum repayment period
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Generally limited to 5 years
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Longer terms (often 15–30 years) may be permitted for loans used to purchase a primary residence.
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Improper repayment structure
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Payments must be level and made at least quarterly
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Missed payments beyond the allowed “cure period” (no later than the end of the following calendar quarter) can trigger a deemed distribution.
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Tax Treatment of a Deemed Distribution
When a deemed distribution occurs:
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The affected loan amount becomes taxable income in the year of the violation.
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A 10% early distribution penalty may apply if the participant is under age 59½.
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Rollover is NOT permitted for a deemed distribution
Importantly, while the loan becomes taxable, it remains on the plan’s books. If the solo 401k participant later repays the loan, those repayments are treated as after-tax basis and are not taxed again when a future distribution occurs.
What Is a Solo 401(k) Loan Offset?
A loan offset is very different. It does not result from violating loan rules. Instead, it occurs when a loan becomes immediately due under the plan’s terms—most commonly when a participant terminates his or her self-employed business or closes the solo 401k plan—and the outstanding balance is not repaid.
In this situation:
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The unpaid loan balance is offset against the participant’s account balance
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The participant does not receive cash
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The offset amount is treated as a taxable distribution unless rolled over
Rollover Flexibility with Loan Offsets
Unlike deemed distributions, loan offsets may be rolled over.
Thanks to special IRS rules:
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The rollover deadline is the tax return due date (including extensions) for the year the offset occurred.
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Even without filing an extension, the IRS allows rollovers as late as October 15 of the following year.
Example: Loan Offset in Action
Janet, age 40, borrowed $10,000 from her solo 401(k) plan in 2022.
In 2025, Janet ceases being self-employed and has a outstanding loan balance of $3,500.
When the self-employed business is closed, the solo 401k plan must be closed, and the outstanding participant solo 401k loan becomes immediately due. If Janet does not repay it, the solo 401k plan will issue a loan offset.
Janet has until October 15, 2026, to roll over some or all of the $3,500 to an IRA.
If she does not:
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$3,500 becomes taxable income for 2025
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She may owe a $350 early distribution penalty because she is under age 59 1/2 so the 10% early distribution penalty would apply
Key Differences at a Glance
| Feature | Deemed Distribution | Loan Offset |
|---|---|---|
| Trigger | Loan rule violation | Loan becomes due (e.g., termination) |
| Loan stays on books? | Yes | No |
| Taxable? | Yes | Yes |
| Early penalty possible? | Yes | Yes |
| Rollover allowed? | ❌ No | ✅ Yes |
| Rollover deadline | N/A | Tax return due date + extension |
Why This Matters for Solo 401(k) Owners
For self-employed individuals, Solo 401(k) loans can be a valuable liquidity tool—but only when administered correctly. Missing payments, exceeding limits, or misunderstanding plan termination rules can turn a loan into an unexpected tax liability.
Working with a provider that documents loans properly, monitors repayment rules, and guides rollover timing can help you avoid costly mistakes.
