How Do You Pay Back a 401(k) Loan?

You pay back a 401(k) loan through automatic payroll deductions, in level payments of principal and interest made at least quarterly, over a maximum of five years for a general purpose loan. You can also pay it off early. Federal law never penalizes prepayment, and plans generally accept a full lump-sum payoff at any time.

By the About401K editorial team · Facts verified against IRC §72(p) and Treas. Reg. §1.72(p)-1 · Updated September 24, 2026

How does 401(k) loan repayment actually work?

When the loan is issued, the plan builds an amortization schedule. That is simply a fixed payment amount, calculated so the full balance plus interest is retired by the end of the term. You will see the number on your loan paperwork before you accept anything.

Your employer then deducts that amount from each paycheck after tax and sends it to the plan, where it buys back into your investments. You don’t write checks or remember due dates, because payroll does the work for you. The law requires payments at least quarterly, but nearly all plans collect every pay period, since that is simply how payroll runs.

The term depends on the loan type. A general purpose loan runs up to 5 years, which is a hard statutory cap, and a principal residence loan can run longer. Your plan document sets the actual maximum, commonly 10 to 15 years. Within the plan’s limits you can usually choose any shorter term you like when you apply, and a shorter term means a bigger deduction from every check.

Can you pay off a 401(k) loan early?

Yes, and this is one of the few parts of the tax code that is unambiguously on your side. Nothing in the code or in any standard plan design penalizes early repayment. There is no prepayment penalty on a 401(k) loan.

Plans generally allow a full lump-sum payoff at any time. You request a payoff quote from the recordkeeper, which is the exact balance plus accrued interest through the payoff date, and then pay by check, ACH, or online transfer. Paying off early stops further interest and puts your money back to work in the market sooner, which is usually the bigger benefit of the two.

Most plans also accept partial prepayments, meaning an extra payment that reduces principal, though this is where plan variation shows up most. Some recordkeepers take partial payments online any time, others accept only full payoffs, and a few still require paper forms. A partial prepayment typically shortens the loan rather than lowering the payroll deduction. Your plan document controls, so ask your administrator what is accepted before you send money.

Payment and interest destination

Both principal and interest are deposited back into your own 401(k) and invested according to your current elections. You are the lender here, so you keep the interest. The plan and the recordkeeper earn nothing from the interest itself, since their compensation comes from the loan fees instead.

The double-taxation question

You may have read that 401(k) loans are “taxed twice.” The effect is real, but it is much smaller than the warnings suggest, and it is worth understanding rather than fearing.

Here is the mechanic. You repay the loan with after-tax paycheck dollars, and when you eventually withdraw pre-tax money in retirement, it is taxed again as ordinary income. But the principal isn’t meaningfully double-taxed. You borrowed pre-tax dollars and you are simply putting them back.

The genuine double taxation applies only to the interest, which is after-tax money going into a pre-tax account and then taxed again on withdrawal. On a typical loan that comes to tax on a few thousand dollars of interest, spread over decades. It is a real cost worth knowing about, not a reason by itself to avoid a loan.

Missed payments and the cure period

A missed payment is not an instant disaster, and this is the single most useful thing to know if you are already behind. You get a grace window called the cure period. The plan may allow you until the end of the calendar quarter following the quarter of the missed payment to make it up (Treas. Reg. §1.72(p)-1, Q&A-10).

In plain terms, miss a payment in February and you can have until June 30 to catch up. February sits in the first quarter, so the cure period runs through the end of the second quarter. That is often more time than people assume they have.

If the cure period does run out, the outstanding balance becomes a deemed distribution. It is taxable income, plus the 10% early-withdrawal penalty if you’re under 59½. The full mechanics are on the default consequences page.

Missed payments usually happen for a structural reason rather than because someone forgot. The common causes are unpaid leave, a payroll system change, and a job change. If you are heading into an unpaid leave, ask about the 12-month suspension rule before payments start failing, because a properly coded suspension prevents the problem entirely.

• ☐ Find out exactly which payment was missed and why. Pull up your pay stubs. A deduction that silently stopped usually points to a payroll change, a leave, or a job change rather than anything you did.
• ☐ Write down the calendar quarter of the missed payment. Your cure period runs through the end of the following calendar quarter, so a miss in January, February, or March gives you until June 30.
• ☐ Call the recordkeeper and ask for the exact cure amount. Ask for the amount past due including accrued interest, and the last date they will accept it. Get that date in writing if you can.
• ☐ Ask how they will take the money. Plans differ on whether a catch-up can come by ACH, check, or an extra payroll deduction, and the answer decides how fast you can fix it.
• ☐ If a leave of absence caused it, say so. Ask whether the plan can apply the leave suspension retroactively, which can clear the missed payments outright.
• ☐ If you cannot cure it, find out the deemed-distribution date. The balance becomes taxable income for that year, plus 10% if you’re under 59½, and you’ll receive a Form 1099-R for it.
• ☐ Keep your contributions running if you can. A missed loan payment does not stop your deferrals, and dropping below your employer match turns one problem into two.

Repaying after leaving your job

Payroll deduction ends with your paycheck, so leaving the employer forces the question. One of three things happens.

• You keep paying directly. Some plans let former employees continue payments by ACH or coupon. If yours does, the loan simply continues on schedule.
• You pay it off. A lump-sum payoff any time before the plan calls the loan keeps the full balance in your account.
• The plan offsets the loan. If you don’t repay, the plan reduces your account by the outstanding balance, a “plan loan offset,” taxable like any distribution.

Here is the rule many older articles still get wrong, and it is worth more than anything else on this page if you have just left a job. Since the 2018 tax law (TCJA), you have until your tax-filing deadline, including extensions, for the year of the offset to come up with the money and roll the offset amount into an IRA or a new employer’s plan. Not 60 days, and not 90 days (IRC §402(c)(3)(C)). Roll over the full amount by that deadline and you owe no tax on the loan at all.

Changing your payment amount

The level-amortization requirement means you cannot lower the scheduled payment or skip months whenever you want. That is the trade for the loan not being taxable. The only recognized pauses are an approved unpaid leave of absence, for up to 12 months, and military service.

In the other direction you have full flexibility. You can pay extra or pay the loan off entirely whenever your plan accepts the payment, with no penalty and no approval needed.

Related reading

• 401(k) loan rules: the 2026 limits and how to borrow
• What happens if you default on a 401(k) loan
• Suspending loan payments during a leave of absence

Sources: IRC §72(p) · Treas. Reg. §1.72(p)-1 · IRC §402(c)(3)(C) · IRS: retirement plan loans