While your 401(k) Savings Plan is primarily for long-term investments, you might find yourself in a situation where you need to access these funds early. If that’s the case, you have options like taking a hardship withdrawal or a plan loan. To initiate any loan or withdrawal, you’ll need to go through your 401(k) management company, such as Vanguard or Fidelity. If your bank account is already linked for electronic transfers, processing times are typically 3–5 business days for a general purpose loan and 7–10 days for a principal residence loan or hardship withdrawal.
When you borrow from your 401(k), you’re expected to repay the borrowed amount plus interest within 5 or 10 years. The good news is that all the repayment, including the interest, goes back into your 401(k) account, benefiting your future self. Repayments are made biweekly, directly deducted from your paycheck, and are generally in the low hundreds. However, if you prefer, you can also make manual repayments of any amount at any time through your plan administrator.
Consider using the Retirement Plan Loan Calculator to determine what a plan loan will cost. There are loans and hardship withdrawals, and the rules are different for each — see Table 16.2
Borrowing from your retirement plan might seem like an easy cash solution, but it comes with strings attached. If you take a plan loan, your paycheck will shrink since you’ll be repaying the loan with interest. Plus, if you don’t repay it on time or leave your job, you could face taxes and a 10% federal penalty. Hardship withdrawals are taxable and may also incur the 10% penalty.
The job-change escape hatch. Leaving your employer with a loan outstanding does not automatically force the tax-and-penalty result. When the plan offsets the unpaid balance against your account (a “loan offset”), you have until the due date of that year’s tax return — including extensions — to deposit an equivalent amount into an IRA or your new employer’s plan as a rollover. Do that and the offset is treated as a completed rollover rather than a taxable distribution: no income tax, no 10% penalty. Miss the deadline and the full offset balance becomes a taxable distribution (plus the penalty if you are under 59½). The practical move on departure with a loan outstanding is to line up the rollover cash before that filing deadline, not to scramble to repay the plan directly.
Remember, dipping into your retirement funds means you’ll have less money saved for your golden years. Thinking of a 401(k) loan as just another loan is misleading. Essentially, you’re cashing out your 401(k) investments tax-free and are expected to pay back the amount within 5 to 10 years.
The loan limit is the lower of $50K or half your 401(k) balance; the term is 5 years (10 for a principal-residence loan). 401(k) loans typically charge the current Prime Rate (defined by the Federal Reserve H.15 release) plus 1%–2%, depending on the plan administrator. The Prime Rate moves with the Fed funds target: it peaked at 8.50% in 2023–2024 and has come down as the Fed cut — roughly 6.75% in early 2026, putting a typical 401(k) loan APR in the 7.75%–8.75% range. Verify the current H.15 print before relying on any specific number here.
However, a 401(k) loan has an effective interest rate of your 401(k) return of , where historically 7–10% annually, when invested primarily in US equities. The salient fact is the amount of your loan $L is taken out of your invested 401(k) assets,so $L stops growing.
Other secondary factors include:
When you borrow from your 401(k) you are lowering your assets which grow tax-free at R% a year. Not helping matters is your 401(k) is your single best place to invest because:
When you borrow from your 401(k), you’re reducing the assets that benefit from this tax-free growth, potentially impacting your financial future.
Long-term US equities have historically grown by more than 10% annually, while more balanced investments have seen growth rates of 7-10% annually. We’ll use this as our estimate for your annual return (). When you take out a loan from your 401(k), the money you borrow isn’t growing at this rate, which effectively becomes the interest rate the loan costs you. For example, if you borrow , after Y years, it could have grown to .
The interest you pay back into your account is relatively insignificant and likely results in a loss.
If you’re considering such a loan, try to borrow against a Roth 401(k) if possible. Borrowing against a pre-tax 401(k) leads to double taxation. The funds in the regular account have already been taxed as ordinary income, and when transferred as interest into pre-tax funds, the entire amount is taxed again as ordinary income upon retirement.
While undesirable, this double-taxed amount is often small. The double taxation does not occur for:
When you repay a 401(k) loan, you use post-tax dollars because the loan proceeds were also “post-tax”. Imagine your tax rate is 33.3%. This means for every $3,000 you earn, you take home $2,000 after taxes. To deposit $10,000 into your bank account, you’d need to earn $15,000 pre-tax. So, $10,000 in your bank equals $15,000 in earnings. Borrowing $10,000 from your pre-tax 401(k) gives you $10,000 in your bank, equivalent to $15,000 in wages. Repaying the 401(k) loan means taking $10,000 from your bank and returning it to your 401(k). The accounting balances; neither party is shortchanged.