HELOC interest is 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 on your federal tax return, but only under one condition: the money must go toward your home itself. If you borrow $50,000 against your home equity and use it to pay off credit card debt, fund a business, or buy a car, that interest is not deductible. If you use the same $50,000 to renovate your kitchen or add a room, the interest becomes deductible.

This rule applies to HELOCs the same way it applies to home equity loans and mortgages. The IRS treats borrowed money differently depending on what you do with it, not where the money comes from. A HELOC is simply a line of credit secured by your home — the deductibility hinges entirely on how you spend it.

Key Takeaways

  • HELOC interest is deductible only when the borrowed funds are used to buy, build, or substantially improve the home that secures the line of credit.
  • If you use HELOC money for personal expenses, debt consolidation, or investments unrelated to your home, the interest is not deductible.
  • You must itemize deductions on your tax return to claim HELOC interest; the standard deduction does not include mortgage interest.
  • The total amount of home debt on which you can deduct interest is capped at $750,000 (or $375,000 if married filing separately) under current federal tax law.
  • Keeping records of how you spent HELOC funds is essential if the IRS questions your deduction.

How the IRS determines what counts as a deductible use

The IRS looks at the use of the funds, not the source. When you draw money from your HELOC, you must be able to show that it went directly toward your home. Deductible uses include: paying for a roof replacement, adding a deck or patio, finishing a basement, installing new windows, upgrading plumbing or electrical systems, or building an addition. Any improvement that adds value to the home or prolongs its useful life generally qualifies.

Non-deductible uses are equally clear. If you use HELOC funds to pay off credit cards, student loans, or medical bills, the interest is not deductible — even though the money came from a home-secured line. If you use it to buy a vehicle, invest in stocks, or start a business, the interest is not deductible. The IRS does not care that you borrowed against your home; it cares what you bought with the money.

The line between improvement and maintenance matters too. Replacing a broken window is maintenance; replacing all windows with energy-efficient ones is an improvement. Fixing a leak is maintenance; replacing the entire roof is an improvement. If you are uncertain whether a project qualifies, the safest approach is to track the expense and discuss it with a tax professional before filing.

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

Even if you use HELOC money for home improvements, the IRS caps the total amount of home debt on which you can deduct interest. As of 2024, you can deduct interest on up to $750,000 in home debt combined — that includes your mortgage, HELOC, and any home equity loans. If you are married filing separately, the cap is $375,000 per person.

This cap has been in place since 2018 and applies to loans taken out after December 15, 2017. If you borrowed before that date, the old cap of $1 million still applies to that debt. The cap is per person, so a married couple filing jointly can deduct interest on up to $750,000 each if they each have separate debts in their own names.

If your total home debt exceeds $750,000, you can still deduct interest, but only on the portion up to the cap. For example, if you have a $600,000 mortgage and a $200,000 HELOC, your total is $800,000. You can deduct interest only on $750,000 of that debt. Your lender will not tell you which portion qualifies; you must calculate it yourself or work with a tax professional.

You must itemize deductions to claim HELOC interest

Claiming HELOC interest requires you to itemize deductions on Schedule A of your federal tax return. You cannot claim it if you take the standard deduction. 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 mortgage interest, property taxes, and charitable donations) add up to more than the standard deduction, itemizing makes sense.

Many homeowners find that their itemized deductions do not exceed the standard deduction, especially after the 2017 tax law changes. If that is your situation, you cannot deduct HELOC interest even if you used the money for home improvements. The math determines whether itemizing is worth your time.

Your lender will send you a Form 1098 each year showing the interest you paid on the HELOC. This form is for your records and helps you calculate your deduction, but you must still report it correctly on Schedule A. The IRS matches your return against the 1098, so make sure the numbers align.

Documentation you need to keep

If you claim HELOC interest as a deduction, keep records showing how you spent the money. This means bank statements showing the HELOC draw, invoices from contractors or suppliers, and receipts for materials or labor. If the IRS audits your return, you will need to prove that the funds went toward home improvements, not personal expenses.

The burden of proof is on you. A cancelled check or bank transfer to a contractor is strong evidence. A credit card statement showing a purchase at a home improvement store is weaker but still useful. If you cannot document the use of the funds, the IRS can disallow the deduction and assess penalties and interest on the unpaid taxes.

Keep these records for at least three years after you file your return, though the IRS can go back further if it suspects fraud. If you are audited, having clear documentation of how you spent the HELOC funds will resolve the issue quickly.

What happens if you use HELOC money for multiple purposes

Many people draw from a HELOC over time and use the money for different things. You might use $20,000 for a kitchen renovation and $15,000 to pay off a credit card. In this case, you can deduct interest only on the portion used for the home improvement — roughly 57% of your interest in this example.

Tracking this split requires careful record-keeping. Some people open a separate bank account and deposit only the HELOC funds they plan to use for home improvements, then draw from that account for contractor payments. This creates a clear paper trail showing which HELOC funds went to which purpose. Without this separation, you will have to estimate the split, and the IRS may challenge your calculation.

If you refinance or pay off the HELOC, the deductibility of the interest does not change retroactively. Interest you paid in prior years remains deductible or non-deductible based on how you used the funds then, not how you use them now.

State tax treatment of HELOC interest

Some states allow you to deduct HELOC interest on your state tax return even if you do not itemize on your federal return. A few states have their own rules about what counts as a deductible use. Before you file, check your state's tax authority website or speak with a tax professional about whether your state offers any additional deductions for home-secured debt.

State rules vary widely and change frequently. What is deductible in one state may not be in another. If you live in a state with income tax, it is worth a few minutes to confirm the rules before you file.

Frequently Asked Questions

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

No. The IRS does not allow you to deduct interest on a HELOC if you used the borrowed funds to pay off credit cards, personal loans, or other non-home debts. The deduction applies only to interest on money used to buy, build, or improve your home. Debt consolidation does not may have access to, even though you borrowed against your home to do it.

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

You can deduct interest only on the portion used for home improvements. You will need to track how much you borrowed for each purpose and calculate the interest proportionally. For example, if 60% of your HELOC went to a renovation and 40% went to other expenses, you can deduct 60% of the interest you paid. Keep detailed records to support this calculation.

Do I need to report the HELOC interest deduction separately from my mortgage interest?

Both go on Schedule A under mortgage interest. You do not need to report them separately, but your lender will send you a Form 1098 for the HELOC showing the interest paid. Make sure the total interest you report on your return matches the 1098s you receive from all your lenders.

What if my HELOC interest exceeds the $750,000 debt cap?

You can still deduct interest, but only on the portion of your debt up to $750,000. If your total home debt is $800,000, you deduct interest as if your debt were $750,000. Your lender does not make this calculation for you; you must do it yourself or work with a tax professional to determine how much of your interest is deductible.

Can I deduct HELOC interest if I use the money to invest in rental property?

No. The deduction applies only to interest on money used to improve the home that secures the HELOC. If you use HELOC funds to buy or improve a rental property or investment property, the interest is not deductible as mortgage interest. You may be able to deduct it as a business or investment expense, but that is a different deduction with different rules — consult a tax professional.