Paying Off Cards With a 401(k) Loan or HELOC: When Converting Debt Is Smart — and When It's Dangerous
A 401(k) loan or a HELOC can cut a card rate by more than half. The catch is what you put on the line: your retirement, your house, and your future if the cards fill back up. Here is when the swap is smart and when it is dangerous.
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📐 Figures verified Sep 28, 2026 against the IRS's retirement plan loan guidance and Notice 2024-55, IRS Publication 936 on home mortgage interest, the Federal Reserve's G.19 card rates (May 2026) and its September 16, 2026 decision. HELOC closing costs in the example match our Debt Relief Path Finder's assumption. How we check numbers →
Swapping 22% card debt for a 401(k) loan or HELOC near 8% cuts the interest, but it trades unsecured debt for debt tied to your retirement or your house. It only works if you've fixed what caused the debt, your job and income are stable, and you won't run the cards back up. Otherwise a balance transfer or debt management plan is safer.
Numbers That Matter
| Figure | Amount | Source | Verified |
|---|---|---|---|
| Average card APR, accounts charged interest | 22.15% (May 2026) | Federal Reserve G.19 | Sep 28, 2026 |
| Federal funds target range | 3.75%–4.00% since Sep. 16, 2026 (prime is usually 3 points above the top: 7.00%) | Federal Reserve | Sep 28, 2026 |
| 401(k) loan limit | The lesser of $50,000 or 50% of your vested balance | IRS | Sep 28, 2026 |
| 401(k) loan repayment | Within 5 years, in roughly level payments at least quarterly (longer for buying a main home) | IRS | Sep 28, 2026 |
| If you leave your job with a loan | The unpaid balance can be offset; roll it over by your tax-return due date, extensions included, or it is taxed | IRS | Sep 28, 2026 |
| Unpaid or unrolled loan | Taxable, plus a 10% additional tax if you are under 59½ | IRS | Sep 28, 2026 |
| Emergency withdrawal alternative | Up to $1,000 a year without the 10% additional tax, repayable within 3 years, if your plan offers it | IRS Notice 2024-55 | Sep 28, 2026 |
| Home equity interest | Deductible only when the money buys, builds or substantially improves the home | IRS Publication 936 | Sep 28, 2026 |
What You're Really Swapping
Credit card debt is unsecured: if you can't pay, your credit suffers and a collector can sue, but no specific asset is on the line, and bankruptcy can erase it. A 401(k) loan borrows from your own retirement account. A HELOC borrows against your house. Both usually carry far lower rates than cards, but both move the risk onto things that are hard to replace. Money in a 401(k) is protected in bankruptcy; money pulled out to pay cards is not. And a HELOC turns a card balance you could discharge into debt your home secures.
The 401(k) Loan: Cheap Until You Change Jobs
You can generally borrow the lesser of $50,000 or half your vested balance, and you repay yourself, with interest, through payroll over up to five years. Plans set the rate, often prime plus one point. There's no credit check, and the interest goes back into your own account.
- The job risk: if you leave or lose your job, the unpaid balance is typically offset against your account. You can roll that amount into an IRA by your tax-return due date, extensions included, but if you can't come up with the cash, it's taxed as a distribution, plus the 10% additional tax if you're under 59½.
- The growth risk: the borrowed money is out of the market while you repay it. When stocks rise faster than your loan's rate, you miss the difference.
- The contribution trap: some people cut back their regular contributions to afford the payments and give up an employer match.
If you only need a small amount, some plans now offer an emergency withdrawal of up to $1,000 a year without the 10% additional tax, which you can repay within three years.
The HELOC: Low Rate, Your House on the Line
A home equity line of credit is usually priced at prime plus a margin, so its rate floats; prime rose with the Fed's September 16 hike. Lenders generally cap total borrowing at a share of your home's value, charge closing costs or fees, and many lines start with an interest-only period that makes the payment look deceptively small. Interest on money used to pay off cards isn't deductible: home equity interest counts only when the money buys, builds or substantially improves the home. Miss payments and the lender can foreclose.
The Re-Borrowing Problem
The biggest risk isn't the rate; it's what happens next. Paying off the cards leaves their limits wide open. If the spending that built the balance hasn't changed, the cards fill up again, and now you owe the new card balances plus the 401(k) loan or HELOC. Before converting, close the gap in your budget, keep one card for emergencies, and consider lowering the limits on the rest.
Worked Example: Morgan's $20,000
Morgan owes $20,000 at 22.15% and compares paying it off over five years.
- 401(k) loan at 8% (prime + 1): $405.53 a month for 60 months; the $4,332 of interest goes back into Morgan's own account.
- HELOC at 8% with 2% closing costs rolled in: $413.64 a month, $24,818 in total, if the rate doesn't rise.
- Keep paying the cards $405.53 a month: 132 months and $53,472, $28,654 more than the HELOC.
- If Morgan loses the job after a year: about $16,611 of the 401(k) loan is still unpaid. Without the cash to roll it over by the tax deadline, it becomes taxable, costing roughly $5,316 at a 22% rate plus the 10% additional tax.
- If the cards fill back up: another $10,000 on the cards two years later, and Morgan owes more than when the plan started.
Rates are illustrative, near prime plus one point; your plan and lender set the real terms. The HELOC is shown fully amortized over five years. Morgan is an illustration.
Decision Rules
If this, then that
- If you can clear the debt within about 18 months → try a 0% balance transfer before touching your retirement or home.
- If your job feels shaky → skip the 401(k) loan; a layoff can turn it into a tax bill.
- If bankruptcy is a real possibility → don't drain protected retirement money or secure card debt with your home.
- If you use a HELOC → amortize it on a fixed schedule, not interest-only, and budget for rate increases.
- If the spending that built the debt hasn't changed → fix the budget first, or the cards will fill up again.
Mistakes to avoid
- Cutting 401(k) contributions and losing the employer match to make loan payments.
- Paying only the interest on a HELOC for years.
- Assuming HELOC interest used for cards is tax-deductible.
- Leaving a job without a plan to repay or roll over the loan balance.
- Running the cards back up after paying them off.
Related: home equity loans vs HELOCs compares the two home-backed options; consolidation vs balance transfer covers the unsecured alternatives; the debt relief decision tree shows every path; and Chapter 7 vs Chapter 13 explains why retirement money is protected in bankruptcy.