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 paid on a home equity line of credit, but only under specific conditions. The money must go toward the home itself — renovations, repairs, construction, or paying off a mortgage on that same property. If you borrow against your home's equity and spend the money on a car, medical bills, credit card payoff, or anything else, that interest is not deductible.

This rule comes from Section 163(h) of the tax code, which limits mortgage interest deductions to loans secured by a may have access to residence and used for home-related purposes. A HELOC is a second mortgage, so it qualifies as a secured loan, but the use of the money determines whether the interest counts.

The total amount of mortgage debt you can deduct interest on is capped at $750,000 if you are married filing jointly, or $375,000 if you are married filing separately. This cap applies to all mortgages and home equity loans combined on your primary residence and one other home.

Key Takeaways

  • HELOC interest is deductible only if the borrowed funds are used to buy, build, or substantially improve the home that secures the line of credit.
  • Using HELOC money for debt consolidation, medical expenses, education, or any non-home purpose makes the interest non-deductible.
  • The mortgage interest deduction is limited to $750,000 of total mortgage debt ($375,000 if married filing separately).
  • You must itemize deductions on your tax return to claim HELOC interest; the standard deduction does not include mortgage interest.
  • Keeping records of how you spent the HELOC funds and which invoices or receipts show home improvement work is essential if the IRS questions your deduction.

How the IRS determines what counts as a may have access to home improvement

The IRS does not require that a home improvement add value to your home, but it must be a permanent improvement to the structure, system, or land. Painting the exterior, replacing a roof, adding a deck, installing new plumbing or electrical systems, finishing a basement, or adding a room all may have access to. Routine repairs and maintenance — fixing a leaky faucet, patching drywall, replacing broken windows — do not count as improvements.

The distinction matters because you can deduct interest on a HELOC used for a new roof or kitchen remodel, but not on a HELOC used to pay for the roofer's labor on a repair that restores the roof to its original condition. If you are unsure whether a project qualifies, the IRS Publication 936 (Home Mortgage Interest Deduction) provides examples, and a tax professional can review your specific situation.

Paying off an existing mortgage on the same home with HELOC funds is also deductible, because the money is still being used for a home-related purpose. However, if you use a HELOC to pay off a mortgage on a different property, or to pay off credit cards or other debts, the interest is not deductible.

Why using HELOC money for non-home purposes disqualifies the interest

The tax code treats mortgage interest differently from other types of interest because Congress intended the deduction to encourage home ownership and investment in residential property. Interest on personal loans, credit cards, car loans, and student loans is not deductible under federal tax law, regardless of your income or circumstances.

If you borrow $50,000 against your home equity and use it to pay off credit card debt, consolidate student loans, or fund a vacation, the IRS sees that as personal borrowing, even though the loan is secured by your home. The interest you pay on that HELOC becomes non-deductible personal interest.

This rule applies even if you intend to use future HELOC draws for home improvements. The IRS looks at how you actually spent the money, not your plans. If you draw $100,000 and spend $60,000 on a kitchen remodel and $40,000 on a car, you can deduct interest only on the portion attributable to the kitchen work — and only if you can document that allocation clearly.

Documenting your HELOC spending to support a tax deduction

If you claim a HELOC interest deduction, you should be prepared to show the IRS how you spent the money. Keep receipts, invoices, and canceled checks from contractors, suppliers, and lenders. If you transferred HELOC funds to a home improvement contractor's account, keep the bank statements showing the transfer and the contractor's invoice showing what work was performed.

The IRS does not routinely audit HELOC interest deductions, but if your return is selected for review, the burden is on you to prove that the borrowed funds went toward may have access to home improvements. A clear paper trail — bank statements showing the HELOC draw, invoices from contractors or suppliers, and proof of payment — is your best defense.

If you used the HELOC for multiple purposes, document each use separately. For example, if you drew $80,000 and spent $50,000 on a roof replacement and $30,000 on a car, keep the roof contractor's invoice and the car purchase receipt. You can then deduct interest only on the $50,000 portion.

The standard deduction versus itemizing to claim HELOC interest

To deduct HELOC interest, you must itemize deductions on your tax return using Schedule A. You cannot claim the deduction if you take the standard deduction, which is a flat amount the IRS allows all taxpayers to subtract from income without itemizing.

For the 2024 tax year, the standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly. If your total itemized deductions — including mortgage interest, property taxes, charitable donations, and medical expenses — exceed the standard deduction, itemizing saves you more money. If they do not, taking the standard deduction is simpler and often results in a lower tax bill.

Many homeowners find that mortgage interest alone does not exceed the standard deduction, especially after the $750,000 mortgage debt cap was introduced in 2018. A tax professional can calculate whether itemizing makes sense for your situation.

State and local tax treatment of HELOC interest

Some states allow a deduction for HELOC interest on state income tax returns, while others do not. A few states — including California, New York, and Illinois — follow federal tax law closely and allow the deduction if it qualifies federally. Other states have their own rules or do not allow mortgage interest deductions at all.

If you live in a state with an income tax, check your state's tax agency website or speak with a tax professional about whether HELOC interest is deductible on your state return. The rules vary significantly, and a deduction that works on your federal return may not work on your state return.

Frequently Asked Questions

Can I deduct HELOC interest if I used the money to pay off credit cards?

No. The IRS does not allow a deduction for interest on a HELOC used for debt consolidation, credit card payoff, or any non-home purpose. Even though the loan is secured by your home, the interest is treated as personal interest and is not deductible.

What if I used part of my HELOC for a home improvement and part for something else?

You can deduct interest only on the portion of the HELOC used for the home improvement. If you borrowed $100,000 and spent $60,000 on a roof and $40,000 on a car, you deduct interest on approximately 60% of the total interest paid. You must document both uses clearly to support this allocation.

Does the $750,000 mortgage debt cap include my HELOC?

Yes. The $750,000 limit applies to all mortgage debt combined — your primary mortgage, second mortgage, HELOC, and any other loans secured by your home. If your primary mortgage is $600,000 and your HELOC is $200,000, your total is $800,000, which exceeds the cap. You can deduct interest only on $750,000 of that debt.

If I used a HELOC to build an addition to my home, is the interest always deductible?

Yes, as long as the addition is a permanent improvement to the structure and the funds were used for that construction. Keep invoices from the contractor and proof that HELOC money was paid to them. Routine repairs or maintenance do not may have access to, but new construction or substantial remodeling does.

Can I deduct HELOC interest if I do not itemize deductions?

No. The mortgage interest deduction is only available if you itemize deductions on Schedule A. If you take the standard deduction, you cannot claim HELOC interest, even if it would otherwise may have access to under the rules.