HELOC interest is tax-deductible only if you use the borrowed money to buy, build, or improve a home

The IRS allows you to deduct HELOC interest only when the loan is secured by your home and the money goes toward home improvements or acquisition. If you use HELOC funds for anything else — paying credit card debt, funding a business, paying medical bills, or buying a car — the interest is not deductible, even though the loan is still backed by your house.

This rule applies to all home equity loans and lines of credit. The distinction is not about the loan itself but about what you do with the money. A HELOC used to renovate your kitchen qualifies. The same HELOC used to pay off a credit card does not, even if it saves you money on interest rates.

The total amount of home equity debt on which you can deduct interest is capped at $750,000 (or $375,000 if you are married filing separately). This limit applies to the combined total of your mortgage and all home equity loans and lines of credit.

Key Takeaways

  • HELOC interest is deductible only if you use the borrowed funds to buy, build, or substantially improve your primary residence or a second home.
  • Using HELOC money for debt consolidation, business expenses, or personal purchases makes the interest non-deductible, regardless of the interest rate.
  • You can deduct interest on up to $750,000 in combined home equity debt across all loans and lines of credit.
  • You must itemize deductions on your tax return to claim HELOC interest; the standard deduction does not include it.
  • Keeping records of how you spent HELOC funds is essential if the IRS questions your deduction.

What counts as a may have access to use for HELOC interest deduction

The IRS considers a HELOC use "may have access to" when the money goes directly to home acquisition or improvement. This includes purchasing the home itself, paying off a mortgage used to buy it, building an addition, replacing a roof, installing new plumbing or electrical systems, or upgrading major systems like HVAC or foundation work. Cosmetic improvements like painting or landscaping typically do not may have access to, though the IRS sometimes allows them if they are part of a larger renovation project.

The key test is whether the improvement adds value to the home or prolongs its useful life. A new kitchen or bathroom usually qualifies. Routine maintenance like fixing a leak or replacing worn siding does not. If you are uncertain whether a specific project qualifies, the IRS Publication 936 (Home Mortgage Interest Deduction) provides detailed examples, or you can consult a tax professional before you borrow.

Using a HELOC to pay off a first mortgage does may have access to for the deduction, because the original mortgage was used to acquire the home. However, using a HELOC to pay off credit cards, medical debt, or a car loan does not may have access to, even though it may lower your overall interest rate.

How to claim HELOC interest on your tax return

To deduct HELOC interest, you must itemize deductions on Schedule A of your Form 1040. You cannot claim it using the standard deduction. This means you add up all your deductible expenses — mortgage interest, property taxes, charitable donations, and medical expenses — and deduct that total instead of the standard deduction amount, which varies by filing status and age.

For the 2024 tax year, the standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly. If your itemized deductions (including HELOC interest) total more than the standard deduction, itemizing saves you money. If they total less, you use the standard deduction and cannot deduct the HELOC interest at all.

Your lender will send you a Form 1098 (Mortgage Interest Statement) in January showing the interest you paid during the year. Use this figure on Schedule A. Keep records of how you spent the HELOC funds in case the IRS asks for proof that the use was may have access to.

When HELOC interest is not deductible

HELOC interest becomes non-deductible the moment you use the money for something other than home acquisition or improvement. Common non-may have access to uses include paying off credit card balances, funding a business or investment, paying tuition or medical expenses, buying a vehicle, taking a vacation, or covering general living expenses.

This rule can create a gray area if you use a HELOC for multiple purposes. For example, if you borrow $50,000 and use $30,000 to renovate your kitchen and $20,000 to pay off credit cards, only the interest on the $30,000 portion is deductible. You must track the allocation carefully and calculate the deductible interest proportionally.

Some people attempt to circumvent this rule by using a HELOC to pay off a mortgage, then using the freed-up mortgage payment to fund non-may have access to expenses. The IRS does not allow this workaround. The deduction depends on the actual use of the borrowed funds, not on how you rearrange other money afterward.

The $750,000 debt limit and how it works

The $750,000 cap applies to the total balance of all home equity debt on which you are claiming interest deductions. This includes your primary mortgage, a second mortgage, a HELOC, and any home equity loan. If you have a $400,000 mortgage and a $400,000 HELOC, your total home equity debt is $800,000, but you can only deduct interest on $750,000 of it.

The limit is per person for tax purposes. If you are married and file jointly, the limit is $750,000 combined. If you are married and file separately, each spouse has a $375,000 limit. The cap has been in place since 2018 and applies regardless of when you took out the loans.

If your total home equity debt exceeds $750,000, you can choose which loans to prioritize for the deduction. Most people prioritize the highest-interest debt first. Your tax professional can help you calculate the optimal allocation.

Documentation you need to keep

The IRS does not require you to submit proof of HELOC interest deduction with your tax return, but you must keep records in case of an audit. These records should include your Form 1098 from your lender, bank statements showing the HELOC draw, receipts or invoices for the home improvement project, and a clear record of how you allocated the borrowed funds if you used the HELOC for multiple purposes.

If you used the HELOC to pay off a previous mortgage, keep the payoff statement and the original mortgage documents showing that the mortgage was used to acquire the home. If you used it for home improvements, keep contractor invoices, permits, and before-and-after photos if available.

Documentation becomes especially important if your HELOC use is borderline. For example, if you claim a deduction for a kitchen renovation that included some personal upgrades, having detailed invoices showing what was structural versus cosmetic helps defend your position if questioned.

Frequently Asked Questions

Can I deduct HELOC interest if I used the money to pay off my first mortgage?

Yes. Because the original mortgage was used to acquire your home, paying it off with a HELOC qualifies for the deduction. The interest on the HELOC is deductible as long as your total home equity debt does not exceed $750,000.

What if I used my HELOC for both home improvements and debt consolidation?

Only the interest on the portion used for home improvements is deductible. If you borrowed $50,000 and used $30,000 for a renovation and $20,000 to pay off credit cards, you can deduct interest on only the $30,000 portion. You must track the allocation and calculate the deductible interest proportionally.

Do I have to itemize deductions to claim HELOC interest?

Yes. You can only deduct HELOC interest if you itemize deductions on Schedule A. If your total itemized deductions are less than the standard deduction for your filing status, you will use the standard deduction instead and cannot claim the HELOC interest.

What happens if the IRS questions my HELOC interest deduction?

The IRS may ask for documentation showing how you used the borrowed funds. Provide your Form 1098, bank statements, and receipts or invoices for the home improvement project. If you cannot prove the money went to a may have access to use, the deduction will be disallowed and you may owe back taxes plus interest.

Does the $750,000 limit include my primary mortgage?

Yes. The $750,000 cap applies to the combined total of your primary mortgage, any second mortgage, HELOCs, and home equity loans. If your total home equity debt exceeds this amount, you can only deduct interest on $750,000 of it.