Learn About 401(k) Loans and Associated Costs

Understanding 401(k) Loans: What They Are and How They Work

A 401(k) loan is money you borrow from your own retirement savings account. Unlike a traditional loan from a bank, you're borrowing from yourself rather than from an outside lender. This means the money comes directly from the balance you've already accumulated in your 401(k) plan through payroll contributions and employer matching.

When you take a 401(k) loan, you enter into a formal agreement with your plan administrator. You must repay the borrowed amount plus interest over a set period, typically between one and five years, though some plans allow longer repayment periods. The interest you pay goes back into your own account, not to a bank or financial institution.

According to the Employee Benefit Research Institute, approximately 17% of 401(k) plan participants had outstanding loans as of recent data. This shows that while 401(k) loans are not uncommon, they represent a minority of account holders who choose this option.

The process begins when you contact your plan administrator or access your plan's online portal to request a loan. You'll typically need to specify how much you want to borrow. The plan administrator reviews your request to ensure it complies with plan rules and federal regulations. Once approved, the funds are usually deposited into your designated bank account within a few business days.

One important distinction: a 401(k) loan is different from a withdrawal. When you withdraw money from a 401(k), you permanently remove it from your retirement savings. With a loan, you're expected to repay it, meaning the money can return to your account and continue growing over time.

Practical Takeaway: Before considering a 401(k) loan, understand that you're temporarily removing money from an account designed to grow for retirement. Know your plan's specific loan provisions by reviewing your plan documents or contacting your employer's benefits department.

Loan Limits and Borrowing Amounts

Federal law places strict limits on how much you can borrow from your 401(k). The maximum loan amount is generally the lesser of two figures: either 50% of your vested account balance or $50,000, whichever is less. This means if your 401(k) balance is $100,000, you could borrow up to $50,000. If your balance is $80,000, you could borrow up to $40,000.

The $50,000 maximum has remained the same since 2001. However, there was a temporary increase during the COVID-19 pandemic under the CARES Act, which allowed borrowers to take up to $100,000 or 100% of their vested balance, whichever was less. This temporary provision expired, and the standard $50,000 limit returned.

Vesting is a critical concept here. Your vested balance refers to the portion of your 401(k) that you actually own. Employer contributions often come with a vesting schedule—meaning you may not own 100% of them immediately. For example, some employers use a five-year vesting schedule where you own 20% of employer contributions each year. You can only borrow against the portion you've vested, not the full balance.

If you have multiple 401(k) plans, the $50,000 limit applies to all of them combined, not to each individual plan. Some people carry loans from previous employers' plans while working for a current employer, and these all count toward your total borrowing limit.

Different plans may offer different maximum loan amounts within these federal guidelines. Some employer plans choose to be more restrictive and allow smaller loans. It's important to review your specific plan's rules to understand what amounts are actually available to you.

Practical Takeaway: Calculate your vested 401(k) balance and determine your maximum borrowing limit using the formula: the lesser of 50% of your vested balance or $50,000. Contact your plan administrator if you're unsure how much of your balance is vested.

Direct Costs: Interest Rates and Administrative Fees

When you borrow from your 401(k), you'll pay two types of direct costs: interest and administrative fees. Understanding both is essential to calculating the true cost of the loan.

Interest rates on 401(k) loans are typically set at the prime rate plus 1% to 2%. As of 2024, the prime rate is influenced by Federal Reserve decisions. When the prime rate is 8.5%, a 401(k) loan might carry an interest rate of 9.5% to 10.5%. This rate is generally fixed for the loan's duration, meaning it won't change even if market rates rise or fall.

For comparison, a personal bank loan might charge 6% to 36% depending on credit history, while a mortgage typically ranges from 6% to 8%. While 401(k) loan rates are often competitive with or better than unsecured personal loans, they represent a cost you wouldn't incur if you didn't borrow.

Administrative fees vary considerably. Some plans charge flat fees of $50 to $100 for processing a loan request, while others charge annual maintenance fees of $25 to $50 per year. A few plans charge no fees at all. These fees go to the plan administrator for handling the loan paperwork and ensuring compliance with regulations.

Origination fees, charged by some plans when the loan is created, typically range from $50 to $300. These are one-time charges and vary based on plan policies.

Over a five-year loan period, a $25,000 loan at 9.5% interest with basic administrative fees could cost between $3,000 and $4,000 in direct costs. The interest you pay goes back into your account, but it still represents money that could have grown through market returns on investments.

Practical Takeaway: Request a loan cost estimate from your plan administrator that shows the exact interest rate, all fees, and the total amount you'll repay. Compare this to alternative borrowing options to determine if a 401(k) loan makes financial sense for your situation.

Hidden Costs and Opportunity Costs

Beyond the direct interest and fees, 401(k) loans carry what financial professionals call "opportunity costs"—the returns you miss out on when money isn't invested in your account. This is often the most significant expense of taking a 401(k) loan, though it's not a direct out-of-pocket cost.

Historically, the stock market has returned approximately 10% annually on average over long periods, though this varies year to year. If you borrow $25,000 for five years at 9.5% interest, you're paying that rate. However, if the market would have returned 10% annually on that $25,000, you've lost the difference in growth. Over five years, this opportunity cost could represent several thousand dollars in foregone gains.

Consider this example: Sarah borrows $30,000 from her 401(k) at 9% interest for five years. She'll repay about $36,900 total, including interest. During those five years, if that $30,000 had remained invested and earned an average 8% annually, it would have grown to approximately $44,000. By borrowing, she's essentially giving up roughly $7,000 in potential growth.

Tax complications represent another hidden cost. If you leave your job while a 401(k) loan is outstanding, the IRS generally requires you to repay the loan within 60 days or face significant consequences. If you can't repay it, the outstanding balance is treated as a distribution. You'll owe income taxes on it, and if you're under age 59½, you'll also owe a 10% early withdrawal penalty. A $20,000 outstanding loan could result in $5,000 to $7,000 in taxes and penalties.

There's also the risk of double taxation. You repay the loan with after-tax dollars. When you eventually withdraw that money in retirement, you'll pay taxes again because 401(k) withdrawals are taxed as income. With regular 401(k) contributions, you only pay taxes once—when you withdraw in retirement.

Missed employer matching is another consideration. While your borrowed money is gone, your employer may not be able to match contributions on that amount in certain plans, or you may miss out on investment