Missing a payment on a 401(k) or 403(b) loan does not immediately turn the balance into a taxable distribution, but the window to fix it is narrower than most people expect. If your plan offers a cure period, federal rules let it run at most until the last day of the calendar quarter after the calendar quarter in which you missed the payment. Catch up every missed installment plus accrued interest by that deadline and the loan returns to good standing. Miss it, and the IRS treats the entire outstanding balance as a deemed distribution.
How the Cure Period Deadline Is Calculated
The rule sounds simple and mostly is: you have until the end of the calendar quarter following the quarter of the missed payment. The trap is that the amount of time this actually gives you depends on where in the quarter the miss falls.
A payment missed in January sits in the first quarter (January through March). The cure period runs through the end of the second quarter, giving you until June 30. That is roughly five months.
A payment missed in March is also in the first quarter, so the deadline is still June 30. That is barely three months.
The worst case is missing a payment on the last day of a quarter. The cure period ends at the close of the very next quarter, which leaves about 90 days.
This is the federal ceiling under Treasury Regulation 1.72(p)-1, not a floor.1eCFR. 26 CFR 1.72(p)-1 – Loans Treated as Distributions Your plan can adopt a shorter one, and any shorter deadline in the plan document controls.
Check Whether Your Plan Even Offers One
Plans are not required to provide a cure period at all.2Internal Revenue Service. Issue Snapshot – Plan Loan Cure Period The regulation only sets a maximum length for plans that choose to include one. A plan can adopt a 30-day cure period, a 60-day cure period, the full statutory maximum, or none at all. The cure period must be written into the plan document to apply.
The first move after any missed payment is pulling your Summary Plan Description or calling the recordkeeper to ask two questions: does the plan have a cure period, and if so, exactly when does it expire for the payment you missed?3Internal Revenue Service. 401(k) Resource Guide – Plan Participants – Summary Plan Description
What Counts as Curing the Loan
To bring the loan back into compliance, you have to pay every missed installment plus the interest that accrued during the gap. Partial payments do not work. The IRS treats the cure as all-or-nothing: if the loan is still delinquent when the window closes, the deemed distribution equals the entire outstanding loan balance, including accrued interest, not just the amount you failed to pay.2Internal Revenue Service. Issue Snapshot – Plan Loan Cure Period
Ask the recordkeeper for the exact catch-up amount and confirm which payment methods they accept. Many plans allow a one-time ACH transfer through an online portal; others require a certified check or money order sent to the custodian. Electronic payments tend to post faster, which matters when you are racing a deadline. Whichever method you use, save the confirmation. If a dispute later arises over whether you cured in time, a timestamped receipt is the best evidence.
Once the catch-up posts, the plan administrator coordinates with payroll to restart regular deductions. Request a revised loan statement showing the updated balance and the date the loan returned to good standing.
What Happens If You Miss the Deadline
If the loan is not cured in time, the plan reports the entire outstanding balance as a deemed distribution under IRC Section 72(p).4Internal Revenue Service. Deemed Distributions – Participant Loans You get a Form 1099-R with distribution code “L” in Box 7, which flags the amount to the IRS as coming from a loan that failed the repayment rules.5Internal Revenue Service. Instructions for Forms 1099-R and 5498 You report it as ordinary income for the year the cure period expired.
If you are under age 59½, a 10% early withdrawal penalty applies on top of regular income tax.6Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions On a $10,000 balance, that alone is $1,000 in penalty before federal and state income tax. The plan cannot pull the tax and penalty from your remaining account balance. You owe it out of pocket.
Two features of a deemed distribution surprise almost everyone. First, being taxed on the balance does not erase the loan. You still owe the money back to the plan under the original loan agreement, and failing to repay can create a prohibited transaction with its own separate penalties.7Internal Revenue Service. Plan Loan Failures and Deemed Distributions Second, a deemed distribution cannot be rolled into an IRA or another employer plan.9Internal Revenue Service. Retirement Plans FAQs Regarding Loans
Underlying Loan Rules the Cure Has to Restore
The cure period exists to keep a delinquent loan compliant with the federal requirements that governed it in the first place. Federal law caps plan loans at the lesser of $50,000 or half your vested account balance, with a floor of $10,000.8Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts Repayment has to happen through substantially level installments made at least quarterly, and the loan generally has to be paid off within five years, with a longer term allowed for a loan used to buy a primary home.10Internal Revenue Service. Retirement Topics – Loans
When a loan drifts out of those requirements, the IRS treats the outstanding balance as a distribution. The cure is the last chance to bring the loan back inside those lines before that treatment locks in.
When the Clock Legitimately Pauses
Active Military Duty
IRC Section 414(u) and the Uniformed Services Employment and Reemployment Rights Act let service members suspend loan repayments entirely during active duty.11Office of the Law Revision Counsel. 26 USC 414 – Definitions and Special Rules The repayment period extends by the length of the military service, so total time to repay can exceed the normal five-year limit.10Internal Revenue Service. Retirement Topics – Loans Interest continues to accrue, but no cure period runs and no deemed distribution occurs. When the service member returns, the remaining payments are recalculated over the extended term.
Non-Military Leave of Absence
If your salary drops during a leave of absence to the point where it cannot cover loan payments, your employer may suspend repayments for up to one year.12Internal Revenue Service. 401(k) Plan Fix-It Guide – Participant Loans Don’t Conform to the Requirements of the Plan Document and IRC Section 72(p) Unlike the military exception, the loan’s original repayment deadline does not extend. You still have to pay off the balance within the original five-year window, so installments after you return will be larger than before because the same principal is squeezed into fewer remaining payments.10Internal Revenue Service. Retirement Topics – Loans
When the Missed Payment Was Not Your Fault
Sometimes the miss traces back to a payroll processing error, a recordkeeper transition, or a plan administration mistake. In those situations the plan sponsor has correction paths that can erase the tax consequences entirely. If a payroll glitch caused your loan to go delinquent, raise it with your employer before the cure period runs out.
Self-Correction Program
The Self-Correction Program (SCP) lets a plan sponsor fix certain loan failures without filing paperwork with the IRS or paying a fee. For defaulted loans, correction involves either a single lump-sum payment covering all missed installments and accrued interest, or re-amortizing the outstanding balance over the remaining loan period so the loan is still repaid within the original five-year window. The approaches can be combined. If corrected this way, no deemed distribution occurs and no Form 1099-R is issued.12Internal Revenue Service. 401(k) Plan Fix-It Guide – Participant Loans Don’t Conform to the Requirements of the Plan Document and IRC Section 72(p)
SCP has limits. It is not available if the maximum five-year repayment period has already expired, and it cannot be used if the plan is currently under IRS examination.
Voluntary Correction Program
When SCP does not apply, the plan sponsor can submit a formal correction through the Voluntary Correction Program (VCP). This requires a user fee that scales with plan size, at the tiers effective January 1, 2026:13Internal Revenue Service. Voluntary Correction Program (VCP) Fees
- $0 to $500,000 in plan assets: $2,000
- Over $500,000 to $10 million: $3,500
- Over $10 million: $4,000
The plan sponsor pays the fee, not the individual participant. A plan-level correction can erase the tax consequences of the missed payment entirely, which makes it worth pushing for whenever the underlying cause was administrative rather than personal.