A workplace retirement-plan loan has both a federal ceiling and plan-specific repayment risk. The ordinary maximum is the lesser of 50% of the participant’s vested balance or $50,000, while a job departure can cause the plan to demand the outstanding balance. Failure to handle that balance can turn the loan into taxable income.
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How the 401(k) loan limits work
A 401(k) plan may offer participant loans but is not required to do so. The plan document can impose limits tighter than federal law. Only the vested account balance is used for the ordinary federal calculation, so unvested employer contributions do not increase borrowing capacity. The IRS participant-loan page states the federal maximum. The IRS’s current participant-loan guidance states the ordinary maximum as 50% of the vested account balance or $50,000, whichever is less. It also says a plan sponsor may require full repayment when employment ends or the plan terminates.
Borrowing reduces the assets invested for retirement and creates a repayment obligation tied to payroll and employment. A layoff or voluntary departure can compress the timeline. If the unpaid amount becomes a plan loan offset or deemed distribution, income tax and possibly an additional early-distribution tax can follow.
Why leaving a job can accelerate the problem
A limited exception can allow up to $10,000 when half the vested balance is below that amount, but plans are not required to offer the exception and additional security may be required. Existing loans can also reduce the available $50,000 ceiling under a 12-month lookback formula. The agency’s loan FAQ covers repayment terms and the limited exception. Most plan loans must be repaid within five years through substantially level payments at least quarterly. A loan used to buy a principal residence can have a longer term if the plan permits it. Missing scheduled payments can cause taxable treatment even while employment continues.
After separation, a qualifying plan loan offset can sometimes be rolled over to an IRA or eligible plan by the federal tax-return due date, including extensions, for the year of the offset. That relief requires replacement money; it does not move the unpaid loan itself.
An offset is not the same event as a deemed distribution
An unpaid loan can become taxable in more than one way, and the rollover opportunity depends on which event occurred. The IRS plan-loan-offset guidance says a qualified plan loan offset must arise because the plan terminates or the worker fails to meet repayment terms after severing employment, and the offset must occur within the specified post-separation period. That status can extend the rollover deadline beyond the ordinary 60 days.
The rollover requires cash from outside the account equal to the amount being replaced. No lender transfers the unpaid note into the IRA. The 2026 Form 1099-R instructions use code M for a qualified plan loan offset and code L for a loan treated as a deemed distribution, underscoring the distinction. The form, distribution date, separation date, and plan notice should be compared before assuming the extended deadline applies.
For example, a $20,000 offset cannot be cured by rolling over the $2,000 still available in cash; replacing the entire taxable amount requires a $20,000 eligible rollover. A partial rollover can reduce the taxable portion, while the unreplaced balance remains subject to the distribution rules. This liquidity test is why employment risk deserves the same attention as the federal borrowing ceiling before a loan is taken.
Who risks a taxable plan-loan offset
The rule applies to participants in plans that permit loans, including many 401(k) plans. IRAs cannot make participant loans. The practical risk is highest for workers with uncertain employment, limited emergency savings, or a large balance that could not be replaced after separation.
What to review before borrowing
Before borrowing, the participant can read the loan section of the summary plan description and request the exact separation rule. The plan should explain the interest rate, fees, payroll schedule, cure period, and treatment after termination. A stress test should assume employment ends soon after the loan. If the outstanding balance could not be repaid or replaced for a rollover, the potential tax cost should be included in the borrowing decision. After a job change, the participant should not ignore a plan notice or Form 1099-R. The offset date, tax-return deadline, rollover eligibility, and available replacement funds should be reviewed promptly with the administrator and tax professional.
The loan file should include the summary plan description, loan agreement, payment history, and separation notices. Together they reveal the outstanding balance, the plan’s post-separation deadline, and whether a reported offset matches the amount that was actually unpaid. “Generally capped” is important because the $10,000 exception, prior loans, and stricter plan terms can change the number. Job departure can trigger repayment, but the exact deadline and tax treatment depend on plan and rollover facts.
Interest paid on a plan loan generally goes back into the participant’s account, but that does not make borrowing costless. Money removed from investments can miss gains, repayments reduce current cash flow, and interest is repaid with after-tax dollars. The decision should compare those costs with an outside loan rather than focusing only on the stated interest rate. The vested-balance calculation can change after market movements. A plan may measure the balance at the time of the request, and a falling market can reduce available borrowing capacity. Pending transactions or an existing loan can also change the maximum. The administrator’s written quote should be treated as time-sensitive.
Payroll interruptions deserve attention during unpaid leave. Federal rules allow limited suspension in certain circumstances, but the five-year term is not freely extended and the plan document controls implementation. A borrower expecting leave should ask how missed installments will be caught up and whether larger payments will be required on return. Spousal consent can be required in plans subject to qualified-joint-and-survivor rules. Fees can also be charged for origination or maintenance. Those plan-specific conditions do not change the federal ceiling, but they affect whether the loan is available and how much cash actually reaches the participant.
This article was researched and drafted with AI assistance and reviewed against the linked primary sources.
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David M. Keller is a finance writer based in Columbus, Ohio, covering personal finance and consumer-focused economic topics. He earned his degree in journalism from Ohio University and began his career reporting on local business and economic trends for a regional media outlet. Since then, he has contributed to a variety of online publications, focusing on clear, practical coverage of topics such as cost of living, debt, and everyday financial decision-making.
