HELOC interest is deductible only if you use the borrowed money to buy, build, or improve real estate

A home equity line of credit (HELOC) lets you borrow against the value of your home. Whether the interest is tax-deductible depends entirely on what you do with the money, not on the fact that it's secured by your house. If you use HELOC funds to renovate your kitchen or add a room, the interest may be deductible. If you use the same HELOC to pay off credit card debt or buy a car, it is not.

This rule comes from Section 163(h) of the Internal Revenue Code, which allows you to deduct interest on debt that is "secured by your principal residence or a second residence" — but only if that debt is used for a "may have access to purpose." The IRS does not care that your HELOC is backed by your home. It cares what the money was for.

The distinction matters because many people treat a HELOC like a general-purpose loan. You can draw from it whenever you want, for any reason. But each draw has its own tax consequence. A $30,000 HELOC might have $10,000 used for a roof repair (deductible), $10,000 used to pay off a car loan (not deductible), and $10,000 used to fund a business (possibly deductible under different rules). The interest you pay on each portion follows the use of that portion.

Key Takeaways

  • HELOC interest is deductible only on the portion of the loan used to buy, build, or substantially improve real estate you own.
  • Using HELOC funds for personal expenses, debt consolidation, or business purposes makes that portion's interest non-deductible, even though the loan is secured by your home.
  • You must track how you spend each HELOC draw because the IRS applies the "tracing rule" — interest follows the money's use, not the loan's form.
  • The total amount of deductible mortgage debt (including HELOCs used for home improvement) is capped at $750,000 for married couples filing jointly, or $375,000 for married filing separately.
  • You report deductible HELOC interest on Schedule A (Form 1040) as mortgage interest, not as a separate line item.

How the IRS traces the use of HELOC money

The IRS uses what is called the tracing rule. This rule says that interest deductibility follows the actual use of the borrowed funds, not the label on the loan or the collateral behind it. If you borrow $50,000 on a HELOC and deposit it into your checking account, then use $20,000 to pay for a deck and $30,000 to pay off a credit card, the interest on the $20,000 portion may be deductible and the interest on the $30,000 portion is not.

The burden is on you to document this. Keep records showing when you drew the money, how much you drew, and what you spent it on. Bank statements, contractor invoices, and credit card payoff confirmations all help prove your case. If you cannot show that money was used for a may have access to purpose, the IRS will assume it was not, and none of the interest is deductible.

This is why financial advisors often recommend keeping HELOC draws separate from other accounts when possible. If you draw $25,000 specifically to pay for a kitchen renovation, deposit it into a separate account, and pay the contractor from that account, the paper trail is clear. Mixing HELOC funds with other money in a general checking account makes it harder to prove what the money was actually used for.

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

The IRS allows HELOC interest deduction for debt used to "buy, build, or substantially improve" real property that secures the debt. This means the property that backs the HELOC — typically your primary home or a second home.

Buying real property includes purchasing a home, a rental property, or land. If you use a HELOC to buy a second home and then find the HELOC against that second home, the interest is deductible.

Building or substantially improving means construction or renovation work that adds value to the property or prolongs its useful life. A new roof, a finished basement, a deck, an addition, or a major kitchen remodel all count. Routine maintenance does not — painting the house the same color, replacing worn carpet with similar carpet, or fixing a broken window are not improvements in the tax sense.

The property being improved must be the same property that secures the HELOC. If you have a HELOC secured by your primary home and you use it to renovate a rental property you own elsewhere, that interest is not deductible under this rule. (It might be deductible as a business expense if you are in the rental business, but that is a different tax category.)

Uses that do not may have access to for HELOC interest deduction

HELOC interest is not deductible if you use the money for personal expenses, even if the loan is secured by your home. This includes paying for a car, funding a vacation, paying medical bills, or consolidating credit card debt. It also includes paying off a student loan or other personal debt. The security behind the loan does not change the nature of the expense.

Business use is more complex. If you use HELOC funds to start or operate a business, the interest may be deductible as a business expense under Section 163(a), but not under the mortgage interest rules. You would report it on Schedule C (if you are a sole proprietor) or on your business tax return, not on Schedule A. The rules are different, and the deduction is subject to different limits. Consult a tax professional if you are borrowing for business purposes.

Investment use also does not may have access to for mortgage interest deduction. If you use a HELOC to buy stocks, bonds, or other securities, the interest is not deductible as mortgage interest. It might be deductible as investment interest under Section 163(d), but again, that is a separate rule with its own limits and requirements.

The $750,000 debt limit on deductible mortgage interest

Even if you use HELOC funds for a may have access to purpose, there is a cap on how much mortgage debt can generate deductible interest. For the 2024 tax year, the limit is $750,000 of total mortgage debt for married couples filing jointly, or $375,000 for married filing separately. Single filers and heads of household are also limited to $375,000.

This limit applies to all mortgage debt combined — your primary mortgage, a second mortgage, a home equity loan, and a HELOC all count toward the same ceiling. If you have a $500,000 mortgage on your primary home and a $300,000 HELOC on the same home, your total mortgage debt is $800,000. Only the interest on the first $750,000 is deductible; interest on the remaining $50,000 is not.

The limit was set at $1 million for tax years before 2018 and is scheduled to return to $1 million after 2025, unless Congress extends the current $750,000 limit. Check the current year's tax instructions or IRS website to confirm the limit for the year you are filing.

How to report deductible HELOC interest on your tax return

You report deductible HELOC interest on Schedule A (Form 1040), under the line for "Mortgage interest paid to financial institutions." You do not need to identify it separately as HELOC interest — the IRS treats it the same as interest on a traditional mortgage or home equity loan.

Your HELOC lender will send you a Form 1098-H (Mortgage Interest Statement) or a Form 1098 (Mortgage Interest Statement) showing the interest you paid during the year. Use this form to complete Schedule A. If the form shows more interest than you can deduct (because some of the HELOC was used for non-may have access to purposes, or because you exceeded the $750,000 debt limit), you will need to calculate the deductible portion yourself and enter only that amount on Schedule A.

To claim the deduction, you must itemize deductions on your tax return. If you take the standard deduction instead, you cannot deduct HELOC interest. For 2024, the standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly. Many taxpayers find that the standard deduction is larger than their itemized deductions, so they do not benefit from deducting HELOC interest even if it would otherwise be deductible.

Keeping records to support HELOC interest deduction

The IRS does not require you to attach documentation to your tax return when you claim HELOC interest deduction, but you must keep records in case of an audit. These records should show: the date and amount of each HELOC draw, the purpose of each draw, and evidence that the money was actually spent for that purpose.

For home improvement draws, keep contractor invoices, receipts, and canceled checks or bank transfers showing payment. For a purchase of real property, keep the closing statement and deed. For a refinance where you used HELOC funds to pay off an existing mortgage and took out cash for home improvement, keep documentation showing how much was used for each purpose.

If you cannot produce this documentation, the IRS may disallow the deduction entirely. The burden is on you to prove that the money was used for a may have access to purpose. A statement that "I used it for a roof repair" without supporting evidence is not enough.

Frequently Asked Questions

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

No. Paying off credit card debt is a personal expense, not a may have access to use. The fact that the HELOC is secured by your home does not change this. The interest on that portion of the HELOC is not deductible, even though you may have lowered your overall interest rate by consolidating.

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

You must track each use separately. The interest on the portion used for home improvement is deductible (subject to the $750,000 limit); the interest on the portion used for personal expenses is not. Your lender's statements should show the total interest paid, and you will need to calculate what portion applies to each use based on your records.

Is HELOC interest deductible if I used it to buy a rental property?

Only if the HELOC is secured by that same rental property. If your HELOC is secured by your primary home and you use it to buy a rental property elsewhere, the interest is not deductible as mortgage interest. It might be deductible as a business expense if you are in the rental business, but that follows different rules.

Do I have to itemize deductions to deduct HELOC interest?

Yes. HELOC interest is reported on Schedule A, which you only use if you itemize. If you take the standard deduction, you cannot deduct HELOC interest. For many taxpayers, the standard deduction is larger than the sum of all itemized deductions, so they do not benefit from deducting HELOC interest even if it qualifies.

What happens if I cannot prove how I used the HELOC money?

The IRS will disallow the deduction. You have the burden of proof. Bank statements alone are not enough — you need documentation showing what the money was actually spent on, such as invoices, receipts, or closing statements. Without this, assume the interest is not deductible.