Borrowing against your own retirement account can look like an obvious win — no credit check, low stated interest, and you’re “paying yourself back.” But a 401(k) loan carries risks a personal loan simply doesn’t, and the comparison is more complicated than the headline rate suggests. Here’s how they stack up.
This article is general information, not personalized financial advice, and not tax or retirement planning advice.
The Two Options at a Glance
| 401(k) Loan | Personal Loan | |
|---|---|---|
| Credit check required | No | Yes |
| Interest rate | Often prime rate + 1–2%, paid back to your own account | Market rate based on credit, ~6%–36% |
| Where the interest goes | Back into your own 401(k) balance | To the lender, as profit |
| Impact if you lose your job | Often due in full within a short window (sometimes as little as 60–90 days), or it’s treated as a distribution | No employment-related acceleration clause |
| Growth opportunity cost | The borrowed amount isn’t invested and doesn’t grow while the loan is outstanding | No effect on retirement savings |
| Tax consequences if not repaid | Treated as an early distribution — taxed as income, plus a 10% penalty if under 59½ | None beyond normal loan default consequences |
| Approval difficulty | Generally easy if your plan allows loans | Depends on credit and income |
How a 401(k) Loan Actually Works
You borrow against your own vested balance, typically up to the lesser of $50,000 or 50% of your vested balance. You repay it through payroll deduction, usually within 5 years (longer if used for a home purchase), and the interest you pay goes back into your own account rather than to a bank. On paper, this looks like a strictly better deal than a personal loan. The catch is what happens to the money while it’s borrowed, and what happens if your employment situation changes.
Current Rate Comparison (2026)
| Product | Typical Rate |
|---|---|
| 401(k) loan | Often prime rate + 1–2%, roughly 8.5%–9.5% in the current environment |
| Personal loan, excellent credit | ~6% – 15% |
| Personal loan, good credit | ~15% – 19% |
| Personal loan, fair credit | ~19% – 27% |
For borrowers with excellent credit, a personal loan’s best rates can actually match or beat a 401(k) loan’s effective rate — especially once you factor in the opportunity cost below.
The Hidden Cost: Lost Market Growth
The 401(k) loan’s interest goes back to you, which sounds like free money — but the borrowed amount is out of the market while it’s loaned out, missing whatever growth it would have otherwise earned. If the market returns more than the loan’s interest rate during the repayment period (historically common over most multi-year periods, though never guaranteed), you come out behind compared to leaving the money invested — even though you’re technically “paying yourself” the interest. This opportunity cost doesn’t show up on the loan paperwork, which is exactly why it’s easy to underweight in the comparison.
When a 401(k) Loan Might Be Considered
A 401(k) loan is more defensible when:
- Your credit doesn’t qualify for a competitive personal loan rate, making the 401(k) loan’s fixed rate meaningfully cheaper on paper.
- Your job is very stable, reducing the risk of the loan being called due on short notice.
- You’re confident you can repay quickly, minimizing the time your retirement funds are out of the market.
- You’ve exhausted lower-risk options and the alternative is high-interest credit card debt or a worse borrowing situation.
When a Personal Loan Wins
A personal loan tends to be the better choice when:
- Your job situation is uncertain. A 401(k) loan’s acceleration clause on job loss is a serious risk — being unable to repay quickly can trigger taxes and a penalty at the worst possible time, right when you’re also dealing with lost income.
- You have good-to-excellent credit and can secure a personal loan rate close to or better than the 401(k) loan’s effective rate, without touching your retirement savings at all.
- You want to protect long-term retirement growth. Keeping the funds invested avoids the opportunity cost of missed market returns during the loan period.
- You value keeping retirement and current debt completely separate, so a job change or financial hiccup doesn’t cascade into a tax event.
Side-by-Side Cost Example
Say you need $20,000 to consolidate debt.
Option A — 401(k) loan, 9% rate paid back to yourself, 5-year term: you pay yourself roughly $4,900 in interest over the term — but if the market would have returned an average of 8% annually on that $20,000 while it was out on loan, the opportunity cost of missed growth can meaningfully exceed the interest you “earned” paying yourself, especially in strong market years.
Option B — Personal loan, good credit, 16% APR, 5-year term: total interest ≈ $8,900 paid to the lender — a real cost, but your retirement savings stay fully invested and untouched the entire time.
Option C — 401(k) loan, then job loss in year 2: the remaining balance may become due within a short window; if you can’t repay it, it’s treated as an early distribution — taxed as ordinary income plus a 10% penalty if you’re under 59½, which can turn a “free” loan into a costly tax event at the worst possible time.
Questions to Ask Yourself Before Choosing
- How stable is my job? This is the single biggest risk factor specific to a 401(k) loan.
- What personal loan rate would I actually qualify for, and how does it compare to the 401(k) loan’s effective rate plus the opportunity cost of lost market growth?
- Can I repay the loan quickly if my employment situation changed unexpectedly?
- Am I comfortable with any amount of retirement growth risk, even if I plan to repay on schedule?
- Have I checked whether my plan even allows loans, and what its specific repayment and acceleration terms are — these vary by employer.
Mistakes to Avoid With Either Option
- Treating the 401(k) loan’s rate as the full cost, without factoring in lost market growth on the borrowed amount.
- Underestimating job stability risk. Even a strong current position can change, and the short repayment window on job loss catches many borrowers off guard.
- Reducing or pausing 401(k) contributions to afford loan repayment, which compounds the retirement savings hit beyond just the borrowed amount.
- Not comparing actual personal loan quotes before assuming the 401(k) loan is automatically cheaper.
- Borrowing from a 401(k) for discretionary debt that could otherwise be paid down with a budget adjustment, rather than reserving this option for genuinely limited alternatives.
Bottom Line
A 401(k) loan can offer a competitive stated rate and avoids a credit check, but its real cost includes the market growth your retirement savings miss out on while the loan is outstanding — plus a serious risk if your job situation changes during repayment. A personal loan costs more in stated interest for many borrowers, but keeps retirement savings untouched and carries no employment-related acceleration risk. For anyone with an uncertain job situation, a personal loan is generally the safer choice even at a higher rate. This article is general information, not personalized financial, tax, or retirement planning advice.