Using a HELOC to Pay Off Debt: When It Makes Sense and When It Doesn't

If you're carrying credit card balances at 22–28% interest, using a HELOC at 8–10% to pay them off looks like a slam dunk. And for many homeowners, it genuinely is. But this strategy has real downsides that don't show up in the interest rate comparison, and ignoring them is how people end up in worse shape than before.

Here's the full picture.

The Math That Makes It Attractive

Say you have $40,000 in credit card debt at an average 24% APR. Your monthly interest alone is roughly $800, and that's before paying anything down. Drawing $40,000 from a HELOC at 9% costs about $300/month in interest. That's a $500/month difference, immediately.

Over five years, the interest savings are dramatic. This is why debt consolidation via HELOC has been a common financial strategy for decades.

The Core Risk: You've Secured Unsecured Debt

Credit card debt is unsecured. If you default on credit cards, your credit score suffers and collection agencies call. But you don't lose your house.

When you use a HELOC to pay off credit cards, you've moved that debt from unsecured to secured by your home. If you can't pay the HELOC, the lender can foreclose. This is the risk that the interest rate calculation doesn't capture.

This doesn't mean the strategy is wrong, it means you need to be honest about why you have the credit card debt in the first place.

When This Strategy Makes Sense

The HELOC consolidation approach works well when the debt came from a one-time event: a medical expense, a necessary repair, a business investment that didn't pay off as fast as expected. If you had solid financial habits before the event and have since course-corrected, consolidation accelerates your recovery.

It also works when you have a credible payoff plan. Using a HELOC to consolidate and then immediately cutting up the credit cards and building a repayment schedule to clear the HELOC in 3–5 years is a sound strategy for many borrowers.

When It Doesn't Make Sense

If you've accumulated $40,000 in credit card debt due to habitual overspending and you don't change that behavior, a HELOC just resets the clock. Within 2–3 years, you'll have $40,000 in new credit card debt and $40,000 owed on your HELOC. Now you've doubled your problem and your house is on the line.

Research on debt consolidation consistently shows that without behavioral change, most borrowers accumulate new debt after consolidating the old.

What About the HELOC Rate Risk?

HELOC rates are variable. If you consolidate $40,000 in debt during a period of low rates and rates rise 3–4%, your payment climbs significantly. This is less of a concern if you're aggressively paying down the balance, but a real risk if you carry it for years.

Tax Considerations

Since the 2017 Tax Cuts and Jobs Act, HELOC interest is only deductible if the funds are used to buy, build, or substantially improve your home. Using a HELOC to pay off credit card debt is not tax-deductible. Some homeowners mistakenly factor in a tax deduction that doesn't apply.

Common Mistake: Not Closing the Credit Cards

Using HELOC proceeds to zero out credit cards and then leaving the accounts open creates temptation. Many homeowners run the cards back up within 18 months. If you're using a HELOC for debt consolidation, close the accounts or at minimum cut up the cards. The short-term credit score impact of lower available credit is worth it.

Bottom Line

A HELOC to pay off high-rate debt is a legitimate and effective strategy when used intentionally, not as a reset button for continued overspending. The lower interest rate is real, the savings are real, and for disciplined borrowers the path to becoming debt-free can be significantly faster. But the trade-off is putting your home equity at risk, and that should be taken seriously.