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

The IRS allows you to deduct interest on a home equity line of credit, but only under specific conditions. The money must go toward the home itself — not toward paying off credit cards, funding a business, or buying a car. If you borrow $50,000 against your house and use it to renovate your kitchen, that interest is deductible. If you use the same $50,000 to pay off student loans or take a vacation, it is not.

This rule comes from Section 163(h) of the tax code, which limits what kinds of interest homeowners can write off. The IRS treats a HELOC like a mortgage in this respect: the interest is only deductible if the debt is "secured by your home" and the proceeds go to "acquire, construct, or substantially improve" that home or another home you own.

The total amount of home debt you can claim interest on has a ceiling. As of 2024, you can deduct interest on up to $750,000 of combined mortgage and home equity debt if you are married filing jointly, or $375,000 if you are married filing separately. Single filers and heads of household can deduct interest on up to $750,000. This limit applies to the total of all your home loans, not to each one separately.

Key Takeaways

  • HELOC interest is deductible only if you use the money to buy, build, or improve a home that secures the line of credit.
  • Using HELOC funds for other purposes — debt consolidation, education, medical bills, or personal expenses — makes the interest non-deductible.
  • You can deduct interest on up to $750,000 of combined home debt ($375,000 if married filing separately) across all your mortgages and HELOCs.
  • You must itemize deductions on Schedule A to claim HELOC interest; the standard deduction is higher for most taxpayers, so many homeowners do not benefit from this deduction.
  • Keeping records of how you spent HELOC proceeds is essential if the IRS questions your deduction.

How the IRS tracks what you spent the money on

The IRS does not require you to submit proof of how you used HELOC funds when you file your tax return. However, if you are audited, you will need to show that the money went toward home improvement or acquisition. The burden is on you to document this.

The best way to create a clear record is to keep receipts, invoices, and bank statements that show the flow of money. If you borrowed $30,000 and paid a contractor directly from the HELOC account, that paper trail is strong. If you transferred the money to your checking account and then paid the contractor weeks later, you should keep both the transfer record and the contractor invoice to show the connection.

For larger projects, get a written estimate or contract from the contractor before the work begins. This document, paired with the final invoice and proof of payment, creates a solid record. If you used the HELOC to pay off an existing home improvement loan, keep the original loan documents and the payoff statement.

When HELOC interest is not deductible

If you use a HELOC for any purpose other than home acquisition or improvement, the interest is not deductible, even though the line of credit is secured by your home. This is a common source of confusion because the debt is still backed by your house — but the tax rule looks at what you did with the money, not what backs the loan.

Common non-deductible uses include paying off credit card debt, funding a child's college tuition, covering medical expenses, starting a business, buying a vehicle, or taking a vacation. In each of these cases, even though you borrowed against your home, the interest does not may have access to for a deduction.

If you borrowed $40,000 against your house and used $25,000 for a kitchen remodel and $15,000 to pay off a car loan, only the interest attributable to the $25,000 is deductible. You would need to calculate what portion of your total interest expense relates to the home improvement portion of the debt. This calculation can be complex, so many people work with a tax preparer to get it right.

Itemizing versus the standard deduction

Even if your HELOC interest is deductible, you may not benefit from the deduction. To claim it, you must itemize deductions on Schedule A of your tax return instead of taking the standard deduction. The standard deduction is a flat amount the IRS allows every taxpayer to subtract from their income without listing individual expenses.

For 2024, the standard deduction is $14,600 for single filers, $29,200 for married couples filing jointly, and $21,900 for heads of household. If your total itemized deductions — mortgage interest, HELOC interest, property taxes, charitable donations, and other may have access to expenses — do not exceed your standard deduction, you will not save money by itemizing. Most taxpayers find that the standard deduction is larger.

To know whether itemizing makes sense for you, add up all your potential itemized deductions and compare the total to the standard deduction for your filing status. If the total is higher, itemize. If not, take the standard deduction and do not claim the HELOC interest. A tax preparer can run both scenarios for you.

The $750,000 debt limit and how it works

The deduction limit applies to the total balance of all home-secured debt you carry, not to each loan separately. If you have a $400,000 mortgage and a $200,000 HELOC, your combined home debt is $600,000, which is below the $750,000 ceiling. All the interest on both loans is deductible (assuming the HELOC proceeds went to home improvement).

If your combined home debt exceeds $750,000, you can only deduct interest on the first $750,000. For example, if you have a $500,000 mortgage and a $300,000 HELOC, your total is $800,000. You can deduct interest only on $750,000 of that debt. The IRS will expect you to calculate what portion of your interest expense relates to the deductible $750,000 and claim only that amount.

This limit has been in place since 2018 and applies regardless of when you took out the loans. If you refinanced or opened a HELOC before 2018, the old rules may have allowed a higher limit, but current deductions are governed by the current $750,000 cap.

Reporting HELOC interest on your tax return

If you itemize deductions, you report HELOC interest on Schedule A, which is part of Form 1040. The line is labeled "Home equity loans not used to buy, build, or improve your home" and a separate line for "Home equity loans used to buy, build, or improve your home." You enter the deductible interest amount on the appropriate line.

Your HELOC lender will send you a Form 1098-H or a statement showing the interest you paid during the year. Use this figure as the starting point, but verify it against your own records. Lenders sometimes make errors, and you are responsible for the accuracy of what you report.

If you used part of the HELOC for home improvement and part for other purposes, you will need to calculate the interest attributable to each use. Divide the home improvement portion by the total HELOC balance, then multiply that percentage by the total interest paid. This gives you the deductible interest. Keep your calculation and supporting documents in case you are audited.

What happens if you refinance a HELOC into a mortgage

If you refinance a HELOC into a traditional mortgage, the interest on the new mortgage remains deductible as long as the original HELOC proceeds went to home acquisition or improvement. The IRS does not penalize you for changing the form of the debt; what matters is what you originally did with the money.

For example, if you had a $100,000 HELOC that you used to build an addition, and later you refinanced that $100,000 into a fixed-rate mortgage, the interest on the new mortgage is deductible. The refinance itself does not change the character of the debt.

However, if you refinance and borrow more than the original HELOC balance, the interest on the excess is not deductible unless you use that excess for home improvement. If you refinanced $100,000 of HELOC debt into a $150,000 mortgage and used the extra $50,000 to pay off credit cards, only the interest on the $100,000 portion is deductible.

Frequently Asked Questions

Can I deduct HELOC interest if I used the money to pay off other debts?

No. Using HELOC proceeds to pay off credit cards, student loans, medical bills, or any other non-home debt makes the interest non-deductible, even though the HELOC itself is secured by your home. The IRS looks at how you spent the money, not what backs the loan.

Do I need to report to the IRS how I used my HELOC?

You do not need to submit proof when you file, but you must keep records showing how you spent the money. If the IRS audits you, you will need to produce receipts, invoices, bank statements, and contractor agreements that demonstrate the funds went to home improvement or acquisition.

What if I used my HELOC for both home improvement and other purposes?

You can deduct interest only on the portion used for home improvement. Calculate what percentage of the total HELOC balance went to home improvement, explore that percentage to your total interest paid, and deduct only that amount. Keep documentation showing how much went to each use.

Is HELOC interest deductible if I do not itemize deductions?

No. You can only claim the deduction if you itemize on Schedule A. If your total itemized deductions are less than the standard deduction for your filing status, you will take the standard deduction instead, and the HELOC interest deduction is lost.

Does the $750,000 limit include my mortgage?

Yes. The $750,000 limit applies to the combined balance of all home-secured debt — mortgages, HELOCs, home equity loans, and any other loans secured by your home. If your total home debt exceeds $750,000, you can deduct interest only on the first $750,000.