Yes, you can borrow from your 401k, but the loan comes from your own money and you repay it to yourself with interest

Most 401k plans allow you to borrow against your vested balance — the money that legally belongs to you right now. You are not borrowing from the plan sponsor or the government. You borrow from your own account, and the plan holds the loan as a promissory note. The IRS sets the rules for how much you can borrow, how long you have to repay it, and what happens if you do not.

The loan is not free. You pay interest to your own account, which means the interest goes back into your 401k rather than to a bank. Even so, you are paying interest on money that was already yours, and you are missing the investment growth that money would have earned if it had stayed invested. Those are real costs, even though no outside lender profits from them.

Not every plan offers loans. Some employers restrict them or prohibit them entirely. Check your plan documents or call your plan administrator to find out whether loans are available to you.

Key Takeaways

  • You can borrow up to 50 percent of your vested 401k balance, or $50,000, whichever is less, though your plan may set a lower limit.
  • You must repay the loan within five years unless you are borrowing to buy a primary residence, which may allow a longer term.
  • If you leave your job, most plans require you to repay the full loan balance within 60 to 90 days or face taxes and penalties on the unpaid amount.
  • The interest rate is typically the prime rate plus 1 to 2 percent, and that interest goes back into your account, not to a lender.
  • You lose the investment growth on the borrowed amount for the duration of the loan, which can significantly reduce your retirement savings.

How much you can borrow and the repayment timeline

The IRS allows you to borrow up to 50 percent of your vested account balance, with a maximum of $50,000. If your vested balance is $100,000, you can borrow up to $50,000. If it is $60,000, you can borrow up to $30,000. Your plan administrator can tell you your exact vested balance and your borrowing limit.

The standard repayment period is five years, with payments made at least quarterly. If you are borrowing specifically to buy or build a primary residence, some plans allow a longer repayment period — often 10 to 15 years — but you must document that the loan is for that purpose. Any other reason falls under the five-year rule.

Payments are usually deducted from your paycheck automatically. If you leave your job before the loan is repaid, the rules change sharply. Most plans require you to repay the entire remaining balance within 60 to 90 days. If you do not, the unpaid amount is treated as a distribution, which means you owe income tax on it plus a 10 percent early withdrawal penalty if you are under 59½.

The interest rate and where the money goes

The interest rate on a 401k loan is set by your plan and is typically the prime rate plus 1 to 2 percent. As of early 2024, that usually falls between 8 and 10 percent, though rates vary by plan and change over time. Unlike a bank loan, the interest you pay goes directly back into your 401k account, not to a lender.

This sounds like a benefit, but it masks a real cost. The money you borrowed is no longer invested in the stock market or bond funds that make up your 401k. While you are paying interest on that borrowed amount, it is sitting idle in a loan account. Meanwhile, the rest of your 401k continues to grow. Over five years, the difference between what your borrowed money would have earned in the market and what you are paying in interest can be substantial.

For example, if you borrow $30,000 at 9 percent interest over five years, you will pay roughly $7,500 in interest. But if that $30,000 would have grown at 7 percent annually in the market, it would have been worth about $42,000 instead of $30,000. The true cost of the loan is not just the interest — it is the interest plus the foregone growth.

What happens if you leave your job

This is the biggest trap with 401k loans. If you change jobs, get laid off, or are fired, your loan typically becomes due in full within 60 to 90 days. Some plans give you longer, but most do not. If you cannot repay it, the unpaid balance is treated as a taxable distribution.

That means you owe federal income tax on the unpaid amount at your ordinary tax rate, plus a 10 percent early withdrawal penalty if you are under 59½. If you borrowed $30,000 and cannot repay $20,000 of it, you will owe income tax on that $20,000 plus the penalty. Depending on your tax bracket, that could be $8,000 to $10,000 or more in taxes and penalties on top of the $20,000 you already lost.

Some plans allow you to roll the loan into an IRA or a new employer's 401k plan to avoid this outcome, but you have to act quickly and your new plan has to accept rollovers. Do not assume this option exists — contact your plan administrator when ready if you change jobs while you have an outstanding loan.

When a 401k loan makes sense and when it does not

A 401k loan is most defensible when you need money for a genuine emergency, have no other source of funds, and are confident you will stay in your job long enough to repay it. Examples include a major medical bill not covered by insurance, a home repair that cannot wait, or a short-term cash flow problem you can solve within a few years.

A 401k loan is usually a poor choice for discretionary spending, education, or anything you could finance through a personal loan or credit card at a lower rate. It is also risky if you work in an unstable industry, are considering a job change, or are nearing retirement. The five-year repayment window is inflexible, and job loss can turn a manageable loan into a tax disaster.

Before you borrow, compare the 401k loan rate to other options. A personal loan from a bank or credit union might charge 8 to 12 percent, which is similar to a 401k loan rate. A home equity line of credit might be lower. A credit card is usually higher. But a personal loan or credit card does not put your retirement savings at risk if you lose your job.

The tax and penalty rules you need to know

A 401k loan itself is not a taxable event. You do not owe income tax on the money you borrow. You only owe tax if you fail to repay it or if you withdraw it after the loan is forgiven.

The interest you pay is not tax-deductible, even though it goes back into your account. This is different from mortgage interest or student loan interest, which can be deducted on your tax return.

If you do not repay the loan by the important date, the unpaid balance is treated as a distribution. You owe income tax on it at your ordinary rate. If you are under 59½, you also owe a 10 percent early withdrawal penalty on top of the income tax. There is no way around this unless your plan allows a rollover to another retirement account.

How to request a 401k loan

Contact your plan administrator or log into your 401k plan's website. Most plans have a loan request form that asks for the amount you want to borrow and the reason. Some plans require documentation — for example, if you are borrowing for a home purchase, you may need to provide a purchase agreement or construction contract.

The approval process usually takes one to two weeks. Once approved, the money is deposited into a checking account you specify. Your first payment is typically due 30 to 60 days after the loan is funded. Payments are usually set up as automatic payroll deductions, so you do not have to remember to send them in.

Keep records of all loan documents and payment confirmations. If you change jobs, you will need proof of the loan balance and the repayment terms to negotiate with your new plan or to set up a rollover.

Frequently Asked Questions

Can I borrow from my 401k if I am self-employed or have a Solo 401k?

Yes, Solo 401k plans allow loans, and the same rules explore. You can borrow up to 50 percent of your vested balance or $50,000, whichever is less. However, if you are the only employee, you cannot borrow from your Solo 401k and then leave the job — you are already self-employed. The five-year repayment rule still applies.

What if I want to borrow more than the limit?

You cannot. The IRS caps 401k loans at 50 percent of your vested balance or $50,000. If you need more money, you would have to withdraw funds instead of borrowing, which triggers income tax and penalties if you are under 59½. Some plans allow you to take a loan and a separate withdrawal, but the withdrawal is still taxable.

Can I pay back the loan early without a penalty?

Yes. Most plans allow you to repay a 401k loan early without any penalty. Paying it back faster reduces the total interest you pay and gets your money back into the market sooner. Check your plan documents to confirm there is no prepayment penalty.

Do I have to report the loan on my tax return?

No. A 401k loan is not reported on your federal tax return unless it goes into default and is treated as a distribution. Your plan administrator will send you a statement showing the loan balance and payments, but you do not file any forms with the IRS unless the loan is forgiven.

What if I die before I repay the loan?

The unpaid loan balance is typically forgiven, and your beneficiaries receive the remaining account balance. However, the forgiven amount may be treated as a taxable distribution to your estate, depending on your plan's rules. Your plan administrator can explain how this works under your specific plan.