HELOC interest is deductible only if you use the borrowed money to buy, build, or improve a home that secures the loan

The IRS allows you to deduct home equity line of credit (HELOC) interest only under one condition: the money must go toward acquiring, constructing, or substantially improving the property that the HELOC is secured against. If you borrow against your home's equity but spend the money on a car, credit card debt, medical bills, or anything else, that interest is not deductible.

The deduction is capped at interest paid on up to $750,000 of home acquisition debt (or $375,000 if married filing separately). This limit applies to the combined total of your mortgage and HELOC, not to the HELOC alone. You must also itemize deductions on Schedule A of your tax return rather than take the standard deduction for the deduction to matter.

The rules changed significantly in 2018. Before that year, you could deduct HELOC interest on up to $100,000 of home equity debt regardless of what you spent the money on. That option ended on December 31, 2017, and has not returned.

Key Takeaways

  • HELOC interest is deductible only if the borrowed funds are used to buy, build, or substantially improve the home securing the line of credit.
  • The deduction applies to interest on up to $750,000 of combined home acquisition debt across all mortgages and HELOCs.
  • You must itemize deductions on your tax return for HELOC interest to reduce your taxable income; the standard deduction blocks this benefit.
  • Interest on HELOC money spent for any other purpose—debt consolidation, education, medical expenses, or personal use—cannot be deducted.
  • Keeping records of how you spent HELOC proceeds is essential if you claim the deduction, since the IRS may request documentation.

How the $750,000 debt limit works

The $750,000 cap is a combined limit across all your home loans, not a separate allowance for each one. If you have a $400,000 mortgage and a $200,000 HELOC, your total home acquisition debt is $600,000, and you can deduct interest on all of it (assuming you meet the other requirements). If you have a $600,000 mortgage and a $300,000 HELOC, only $150,000 of the HELOC interest is deductible because your combined debt exceeds the cap.

This limit applies per person if you file as single, and per couple if you file jointly. If you are married filing separately, each spouse's limit is $375,000. The cap has remained at $750,000 since 2018 and has not adjusted for inflation.

The limit covers only home acquisition debt—money borrowed to buy or build the home or to make capital improvements. It does not cover home equity debt used for other purposes, which is not deductible at all under current law.

What counts as a capital improvement

A capital improvement adds value to your home, prolongs its life, or adapts it to a new use. Examples include a new roof, an addition, a kitchen remodel, a new HVAC system, or a deck. Repairs and maintenance—fixing a leaky faucet, painting, replacing worn siding—do not count, even if they are expensive.

The distinction matters because if you borrow via HELOC to repair your home rather than improve it, the interest is not deductible. The IRS distinguishes between keeping a home in good condition (not deductible) and making it better or larger (deductible). A contractor's invoice or permit from your local building department can help document that work was an improvement, not a repair.

If you use HELOC money partly for an improvement and partly for something else, only the portion tied to the improvement generates deductible interest. Tracking how much went to each use is your responsibility.

Itemizing versus the standard deduction

Even if your HELOC interest qualifies for deduction, you receive the benefit only if you itemize deductions on Schedule A of your tax return. 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—HELOC interest, mortgage interest, state and local taxes, charitable contributions, and medical expenses—do not exceed the standard deduction, you will not benefit from deducting HELOC interest.

Many homeowners find that the standard deduction is larger than their itemized deductions, which means claiming HELOC interest deduction saves them nothing. A tax professional can help you calculate whether itemizing makes sense in your situation.

Documentation the IRS may request

If you claim a HELOC interest deduction, keep records showing how you used the borrowed money. This might include a closing statement from the lender, invoices from contractors, permits from your local building department, or receipts for materials. The IRS does not require you to attach these documents to your return, but you must have them available if the agency audits your return.

The burden is on you to prove that the money went toward home acquisition or improvement. A HELOC statement alone does not prove this; it only shows that you borrowed money and paid interest. If you cannot document the use of the funds, the IRS may disallow the deduction and assess back taxes plus penalties.

If you used the HELOC for multiple purposes, separate the amounts clearly. For example, if you borrowed $50,000 and spent $30,000 on a kitchen remodel and $20,000 on a car, document both amounts so you can claim the deduction only on the $30,000 portion.

HELOC interest used for debt consolidation

Using a HELOC to pay off credit cards, personal loans, or other debts is common because HELOC interest rates are often lower than credit card rates. However, the interest on that HELOC is not deductible, even though the underlying debt may have been higher-interest. The IRS looks at what you do with the borrowed money, not where the money came from before.

If you consolidate $30,000 in credit card debt into a HELOC, the HELOC interest is not deductible. This is true even if you used the credit cards to pay for home improvements in the past. The deduction applies only to HELOC money that goes directly toward home acquisition or improvement, not to money that replaces other debts.

State and local tax treatment

Some states follow federal rules for HELOC interest deduction, while others have their own rules or do not allow the deduction at all. A few states allow deduction of HELOC interest on home equity debt regardless of how the money is spent, which differs from federal law. Check your state's tax authority website or consult a tax professional to understand how your state treats HELOC interest.

If you live in a state with an income tax, the state deduction may be more generous or more restrictive than the federal deduction. You may be able to deduct HELOC interest on your state return even if you cannot on your federal return, or vice versa.

Frequently Asked Questions

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

No. Using HELOC money to pay down or pay off an existing mortgage is not considered home acquisition or improvement. The interest on that HELOC is not deductible. However, if you used the HELOC to refinance your mortgage at a lower rate and the combined debt stays under $750,000, the interest on the refinanced portion may be deductible as home acquisition debt.

What if I used my HELOC for both a home improvement and a vacation?

Only the interest on the portion used for the home improvement is deductible. You must track and document how much of the borrowed money went to each use. If you borrowed $40,000 and spent $25,000 on a roof and $15,000 on a vacation, only the interest on $25,000 is deductible.

Do I need to report HELOC interest to the IRS even if I do not itemize?

No. If you take the standard deduction, you do not report HELOC interest on your tax return at all. The deduction is available only to those who itemize. Your lender will send you a Form 1098 showing interest paid, but you use that form only if you itemize deductions.

Can I deduct HELOC interest on a second home or investment property?

HELOC interest on a second home is deductible under the same rules as a primary home—only if the money was used to buy, build, or improve that second home, and only up to the $750,000 combined limit. HELOC interest on investment property is treated differently and may be deductible as a business or investment expense, but that follows separate rules.

If my HELOC interest is not deductible, can I deduct the principal I pay back?

No. Principal payments on any loan, including a HELOC, are never tax-deductible. Only interest is potentially deductible, and only when it meets the requirements described here.