401(k) Loans: Think Carefully

The plain answer

A 401(k) loan lets you borrow from your workplace retirement account and repay the balance, with interest, through your plan. That can sound like free money because the interest returns to your account. It is not free money.

The money you borrow is no longer invested, so it can miss market growth. You also take on a serious job-change risk: if you leave your employer, your plan may require faster repayment. Any amount you cannot repay may become a taxable distribution, and an additional tax may apply if you are under the applicable age.

How it actually works

Your employer’s plan decides whether loans are available and sets the repayment process within federal rules. When you borrow, the plan sells investments in your account and sends you cash. You then repay principal and interest, often through payroll deductions.

The interest is real, but paying it to your own account does not erase the cost. The borrowed amount can miss gains while it is out of the market. Repayments also come from your paycheck, so the loan reduces the cash available for other goals.

Leaving your job can create a second payment problem. You may need to replace the outstanding balance while also managing a job transition. If you cannot, taxes and a possible additional tax can turn a cash-flow fix into a more expensive setback.

What this means for you

Treat a 401(k) loan as debt with unusual collateral: your future retirement. Before borrowing, compare the full cost with other options and ask your plan administrator what happens if your employment ends.

Consider the loan only after you understand:

• how much invested money will leave the market
• the payment amount and repayment period
• whether payments continue outside payroll
• what the plan requires after a layoff, resignation, or job change
• the tax result if you cannot repay

For a true emergency, a loan may be less damaging than some high-interest alternatives. That does not make it harmless. Keep contributing enough to capture any employer match if your budget and plan rules allow it, and build a repayment plan that can survive a job change.

Common mistakes

• Calling the loan free because the interest goes back to your account.
• Ignoring the investment growth the borrowed money may miss.
• Assuming the original repayment schedule survives a job change.
• Borrowing for routine spending without fixing the monthly cash shortfall.
• Pausing retirement contributions and losing an employer match without counting that cost.
• Taking the maximum available instead of the minimum needed.

Related pages

• How a 401(k) Works
• Good Debt, Bad Debt, and Necessary Debt
• The Order of Operations for Your Money