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 home equity line of credit (HELOC) interest only when the money goes toward your home itself — not for other purposes. If you borrow $50,000 against your home's equity and use it to pay off credit cards, buy a car, or cover medical bills, that interest is not deductible. If you use the same $50,000 to add a room, replace the roof, or pay off a mortgage on that same home, the interest becomes deductible.

This rule exists because the tax code treats HELOC debt like a mortgage: the loan is secured by your home, and the interest is only deductible when the debt itself is used for home-related purposes. The IRS does not care what you intended to do with the money — it cares what you actually did with it.

Key Takeaways

  • HELOC interest is deductible only when you use the borrowed funds to buy, build, or substantially improve your primary home or a second home you own.
  • If you use HELOC money for anything else — debt consolidation, education, medical expenses, or personal spending — that interest is not deductible.
  • You must itemize deductions on your tax return to claim HELOC interest; the standard deduction does not include it.
  • The total amount of home debt you can deduct interest on is capped at $750,000 (or $375,000 if married filing separately) under current tax law.
  • You will need documentation showing how you used the HELOC funds if the IRS ever questions your deduction.

How the IRS determines whether your HELOC interest is deductible

The IRS uses a simple test: what did you do with the money? Not what you said you would do, but what you actually did. If you took out a HELOC and deposited it into your checking account, then paid your mortgage from that account, the IRS considers the money used for your home. If you deposited it and then wrote a check to a credit card company, the money went to debt repayment, not home improvement.

This is why documentation matters. Keep records of where the HELOC funds went: bank statements, receipts for construction work, invoices from contractors, or proof of payment to your mortgage lender. If you cannot show how you used the money, you cannot defend the deduction if audited.

The rule applies to your primary residence and one second home. You cannot deduct HELOC interest on a vacation property, rental property, or investment property, even if you own it outright.

The $750,000 debt limit and how it affects your deduction

Even if all your HELOC money went toward home improvements, you can only deduct interest on up to $750,000 of total home debt. This limit includes your mortgage, any home equity loans, and any HELOC balance. If you have a $400,000 mortgage and a $500,000 HELOC, only $350,000 of the HELOC qualifies for the interest deduction (because $400,000 + $350,000 = $750,000).

The limit is $375,000 if you are married filing separately. This cap has been in place since 2018 and applies regardless of when you took out the loan.

If your total home debt exceeds $750,000, you still pay interest on the full amount — you simply cannot deduct the interest on the portion above the limit. Your lender will not separate the deductible portion from the non-deductible portion; you have to calculate it yourself when you file taxes.

You must itemize deductions to claim HELOC interest

HELOC interest is only deductible if you itemize deductions on your tax return. Most people take the standard deduction instead, which is a flat amount the IRS allows without requiring you to list individual expenses. For 2024, the standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly.

If your total itemized deductions — mortgage interest, HELOC interest, state and local taxes, charitable donations, and medical expenses — add up to more than the standard deduction, itemizing saves you money. If they do not, the standard deduction is better, and you cannot claim HELOC interest at all.

You will need to file Schedule A (Itemized Deductions) along with your Form 1040 to claim HELOC interest. Your tax software or preparer can calculate whether itemizing or taking the standard deduction benefits you more.

HELOC interest that is never deductible

Certain uses of HELOC money are never deductible, no matter how much you borrowed or what your income is. If you used the HELOC to pay for education, medical care, a vehicle, credit card debt, or personal expenses, that interest cannot be deducted. If you used it to invest in stocks, bonds, or a business, the interest is also not deductible (though you may be able to deduct investment-related expenses separately).

Some people use a HELOC to pay off a mortgage early or to pay down the principal on their existing mortgage. This is considered a home-related use, and the interest is deductible. However, if you use a HELOC to pay off a mortgage on a property you no longer own, the interest is not deductible.

Tracking HELOC use for tax time

The IRS does not require you to report how you used HELOC funds when you take out the loan. However, if you claim the interest deduction and the IRS audits you, you will need to show proof of how the money was spent. This means keeping bank statements, wire transfer records, contractor invoices, receipts, and canceled checks for at least three years.

If you used the HELOC for multiple purposes — some for home improvement and some for other expenses — you can only deduct the interest proportional to the home-improvement portion. For example, if you borrowed $100,000 and used $60,000 for a kitchen remodel and $40,000 to pay off credit cards, only 60 percent of the interest is deductible.

Some people use a separate bank account for HELOC funds earmarked for home improvement. This makes it easier to prove to the IRS that the money went where you said it did. It is not required, but it simplifies record-keeping.

State tax treatment of HELOC interest

Federal tax law allows the deduction, but state tax law varies. Some states follow federal rules exactly; others have different limits or do not allow the deduction at all. A few states have no income tax, so the question does not apply. Check your state's tax authority website or ask a tax preparer about your state's rules before assuming you can deduct HELOC interest on your state return.

Even if your state does not allow the deduction, you can still claim it on your federal return if you meet the IRS requirements.

Frequently Asked Questions

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

Yes. Using HELOC funds to pay down or pay off your mortgage is considered a home-related use. The interest on that HELOC is deductible, subject to the $750,000 debt limit. Keep documentation showing the HELOC money went to your mortgage lender.

What if I used my HELOC for both home improvement and personal expenses?

You can only deduct the interest on the portion used for home improvement. If you borrowed $100,000 and used $70,000 for a renovation and $30,000 for other expenses, only 70 percent of the interest is deductible. You will need clear records showing how much went to each purpose.

Do I have to report my HELOC use to the IRS when I take out the loan?

No. The IRS does not require you to report how you plan to use HELOC funds upfront. However, if you claim the interest deduction and are audited, you must provide documentation proving the money went toward home-related purposes. Keep bank statements and receipts for at least three years.

Is HELOC interest deductible on a rental property or investment property?

No. The deduction only applies to your primary residence or one second home you use personally. HELOC interest on rental or investment properties is not deductible under this rule, though you may be able to deduct it as a business expense if you use the property for business purposes.

What if my total home debt exceeds $750,000?

You can only deduct interest on $750,000 of home debt. If you have a $500,000 mortgage and a $400,000 HELOC, only $250,000 of the HELOC qualifies for the deduction. The interest on the remaining $150,000 of HELOC debt is not deductible. Calculate your deductible amount carefully or ask a tax preparer for help.