Interest on a home equity line of credit is tax deductible only if you use the borrowed money to buy, build, or improve your home

The IRS allows you to deduct interest paid on a home equity line of credit (HELOC) only under specific conditions. The money must go toward your primary residence or a second home, and you must use it for home improvement — not for other purposes like paying off credit cards, funding a business, or paying medical bills. If you borrowed $50,000 against your home equity but used $30,000 to renovate your kitchen and $20,000 to pay down a car loan, you can only deduct the interest on the $30,000 portion.

The total amount of debt on which you can deduct interest is capped at $750,000 for married couples filing jointly (or $375,000 if married filing separately). This limit applies to the combined total of your mortgage and all home equity debt. If you have a $400,000 mortgage and a $500,000 HELOC, you can only deduct interest on $750,000 of that combined debt — meaning part of your HELOC interest will not be deductible.

Key Takeaways

  • HELOC interest is deductible only when the borrowed funds are used to buy, build, or substantially improve your home — not for other debts or expenses.
  • The $750,000 debt limit applies to your combined mortgage and home equity debt, so a large HELOC may push some interest beyond the deductible threshold.
  • You must itemize deductions on Schedule A of your tax return to claim HELOC interest; the standard deduction eliminates this benefit for most taxpayers.
  • Interest paid on a HELOC used for business purposes, investment property, or non-home expenses is never deductible, even if the home is collateral.

How the IRS determines what counts as a home improvement

The IRS distinguishes between repairs, maintenance, and improvements. Painting your house, fixing a roof, or replacing a water heater are repairs and do not count. A new roof that extends the life of your home, adding a room, installing new plumbing or electrical systems, or replacing old windows with energy-efficient ones are improvements. The line is whether the work adds value to your home or simply restores it to its original condition.

Keep receipts and invoices for any work you claim as an improvement. If you are audited, the IRS will ask for documentation showing what the money was spent on. A contractor's invoice stating "kitchen renovation" is stronger evidence than a bank statement showing a transfer to your contractor's account. If you borrowed $100,000 but only $60,000 went to home improvements and $40,000 went to other purposes, you can only deduct interest on the $60,000.

The itemization requirement: why most people cannot claim this deduction

Even if your HELOC interest meets the IRS rules, you can only deduct it if you itemize deductions on your tax return. Most taxpayers take the standard deduction instead, which for 2024 is $14,600 for single filers and $29,200 for married couples filing jointly. If your total itemized deductions — mortgage interest, property taxes, charitable donations, and HELOC interest combined — do not exceed the standard deduction, you get no tax benefit from the HELOC interest.

This means a homeowner with a modest HELOC and no other large deductions will likely see no tax savings. You would need enough combined deductions to exceed the standard deduction threshold before any HELOC interest deduction helps you. A tax professional can calculate whether itemizing makes sense for your situation.

HELOC interest that is never deductible

If you use HELOC funds for any of these purposes, the interest is not deductible under any circumstance:

  • Paying off credit card debt, car loans, or other consumer debt
  • Funding a business or investment (even if you own rental property)
  • Medical or dental expenses
  • Education costs
  • Vacation or personal expenses
  • Buying stocks, bonds, or other investments

The fact that your home is the collateral does not change this rule. The IRS looks at what you did with the money, not what you pledged as security. If you borrowed against your home to start a business, that interest belongs on Schedule C (business deductions), not on Schedule A (itemized deductions for homeowners).

Tracking HELOC use when you borrow for multiple purposes

If you draw from your HELOC multiple times for different purposes, you need a clear record of how much went where. The IRS does not require a specific form, but you should document the date, amount, and purpose of each draw. If you make a $25,000 draw on January 15 and use $15,000 for a roof replacement and $10,000 to pay off a credit card, track both amounts separately.

Some people use a separate bank account for HELOC funds earmarked for home improvements. Money goes into that account, then out to contractors. This creates a clear paper trail. If you mix HELOC money with other funds in a general checking account, the IRS may challenge your deduction if you cannot show exactly where the money went.

What happens if you refinance or pay off your HELOC

If you refinance your HELOC into a new loan, the interest on the new loan is deductible only if the money was originally borrowed for a deductible purpose. Refinancing does not change the underlying use of the funds. If you originally borrowed $50,000 to renovate your kitchen and then refinanced that debt into a personal loan, the interest on the personal loan remains deductible because the original use was a home improvement.

Once you pay off a HELOC, you cannot deduct any remaining interest. The deduction applies only to interest you actually pay during the tax year. If you pay off the balance in December, you can deduct interest through that month, but no further.

State and local tax limits on mortgage and HELOC interest

Federal tax law allows the deduction, but some states do not. A few states do not have income tax at all, so the question does not arise. Others allow the deduction but may have different rules about the debt limit or what counts as a home improvement. Check your state's tax guidance or speak with a tax professional about how your state treats HELOC interest.

Additionally, the federal cap on state and local taxes (SALT) limits how much you can deduct for property taxes and state income taxes combined. This does not directly affect HELOC interest deductions, but it can affect your overall tax picture if you are itemizing.

Frequently Asked Questions

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

No. The IRS does not allow a deduction for interest on borrowed money used to pay consumer debt, even if the debt is secured by your home. The original use of the funds determines deductibility, not the collateral.

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. If you borrowed $100,000 and spent $60,000 on a new roof and $40,000 on a vacation, calculate the interest on the $60,000 portion and deduct only that amount. Keep documentation of how the money was spent.

Do I need to report HELOC interest separately on my tax return?

HELOC interest goes on Schedule A (Itemized Deductions) under "Home Equity Loan Interest." You combine it with your mortgage interest and other deductible items. You can only claim it if your total itemized deductions exceed the standard deduction for your filing status.

If I used my HELOC to improve a rental property I own, can I deduct the interest?

No, not as a homeowner deduction. Interest on debt used to buy or improve rental property is a business expense and goes on Schedule E (Rental Income and Loss), not Schedule A. The rules are different and the deduction is not subject to the $750,000 debt limit.

What records do I need to keep to prove HELOC interest is deductible?

Keep your HELOC statements showing interest paid, receipts and invoices from contractors or vendors showing what the money was spent on, and any documentation of the draw dates and amounts. If audited, the IRS will ask for proof that the borrowed funds went to home improvements.