HELOC interest can be tax-deductible — but the conditions are specific, the paperwork matters, and for the majority of American homeowners, the standard deduction threshold means they receive no actual tax benefit even when they technically qualify. This guide gives you the full picture: what the rules are, what changed in 2026, what you need to document, and how to work out whether the deduction is genuinely worth anything for your situation.
One thing I'll say upfront: tax deductibility should be a secondary consideration when evaluating a HELOC, not the primary one. The rate saving and the flexibility of the draw structure are what make a HELOC financially useful. A potential tax deduction is a bonus — and only if you itemise.
The short answer
HELOC interest is tax-deductible in 2026 if and only if three conditions are met:
- The HELOC funds were used to buy, build, or substantially improve the home that secures the loan
- Your total qualified home loan debt (first mortgage + HELOC) does not exceed $750,000 ($375,000 if married filing separately)
- You itemise your deductions on Schedule A — the standard deduction and the mortgage interest deduction are mutually exclusive; you can only claim one
If all three are true, the interest you paid on the HELOC during the tax year is deductible as home mortgage interest. If any one of the three is not true, the interest is not deductible — regardless of how the loan is structured or what you call it.
The IRS does not care whether you have a HELOC, a home equity loan, or a cash-out refinance. What matters is what the money was spent on. Using a HELOC to pay off credit cards, fund a holiday, buy a car, or cover living expenses means the interest is not deductible — full stop. The deduction follows the money, not the loan product.
2026 law update: the One Big Beautiful Bill Act made the rules permanent
The current HELOC interest deduction rules were originally introduced by the Tax Cuts and Jobs Act (TCJA) in 2017 and were scheduled to sunset on December 31, 2025 — potentially reverting to the more generous pre-2018 rules. That reversion did not happen. The One Big Beautiful Bill Act (OBBBA), signed into law on July 4, 2025, made the TCJA individual tax provisions permanent. The current rules — including the $750,000 debt limit and the use-of-funds requirement — are now the permanent law of the land, not temporary provisions. There is no further sunset to plan around.
This matters for planning purposes. Before the OBBBA passed, some homeowners were waiting to see whether the rules might revert to the pre-TCJA framework (which allowed deduction of home equity interest regardless of use, up to $100,000). That option is now definitively off the table. The current rules are permanent.
Source: IRS.gov — One Big Beautiful Bill Act provisions; Tax Foundation 2026 analysis.
What IRS Publication 936 actually says
IRS Publication 936 — Home Mortgage Interest Deduction is the primary IRS guidance document for this topic. The October 2025 edition (for use in preparing 2025 returns) states the rule directly in its reminders section:
"Home equity loan interest. No matter when the indebtedness was incurred, you can no longer deduct the interest from a loan secured by your home to the extent the loan proceeds weren't used to buy, build, or substantially improve your home."— IRS Publication 936, October 2025 edition (irs.gov/pub/irs-pdf/p936.pdf)
The publication applies this rule equally to first mortgages, home equity loans, and HELOCs — it is a unified standard based on use of funds, not loan type. Publication 936 also defines the phrase "substantially improve" as work that adds value to the home, prolongs its useful life, or adapts it to new uses. Routine maintenance (painting, fixing a leaky tap) does not qualify as a substantial improvement. A kitchen renovation, bathroom addition, or structural extension does.
The full publication is available directly from the IRS at: irs.gov/pub/irs-pdf/p936.pdf
What qualifies — and what doesn't
✔ Interest IS deductible (if you itemise)
- Kitchen renovation or extension
- Bathroom addition or remodel
- New roof, windows, or HVAC system
- Basement conversion or finishing
- Garage addition
- Accessibility modifications (ramp, lift)
- Solar panel installation
- Structural repairs that add value
✘ Interest is NOT deductible
- Paying off credit card debt
- Consolidating personal loans
- Buying a car or boat
- Funding tuition or education costs
- Covering medical bills
- Holidays or personal expenses
- Day-to-day living costs
- Investing in stocks or other assets
IRS Publication 936 distinguishes between routine maintenance (not deductible) and substantial improvements (deductible). Repainting a room is maintenance. Adding a room is an improvement. Replacing a broken boiler is maintenance. Replacing a boiler as part of a comprehensive energy-efficiency upgrade that increases the home's value may qualify. When in doubt, document the scope of work carefully and consult a tax professional — the IRS applies a facts-and-circumstances test, not a fixed list.
The $750,000 combined debt limit
Even when your HELOC funds qualify under the use-of-funds test, the deduction is subject to a combined debt ceiling. For tax years 2026 onwards (under OBBBA-made-permanent rules), you can only deduct interest on the first $750,000 of total qualified home loan debt — combining your first mortgage and your HELOC together.
| Filing status | Maximum deductible home loan debt | Applies to loans taken out after… |
|---|---|---|
| Single / married filing jointly | $750,000 | December 15, 2017 |
| Married filing separately | $375,000 | December 15, 2017 |
| Pre-2018 mortgages (grandfathered) | $1,000,000 | Before December 16, 2017 |
Source: IRS Publication 936 (October 2025 edition).
For most homeowners this limit is not a practical constraint — a $500,000 mortgage plus a $60,000 HELOC totals $560,000, well below the $750,000 cap. It becomes relevant for homeowners in high-cost markets with large mortgages who are also drawing significant HELOC balances. If your combined total approaches or exceeds $750,000, only the interest on the first $750,000 of debt is deductible; you must prorate.
The standard deduction hurdle — the real reason most people get no benefit
This is the part that most articles on HELOC tax deductibility skip over — and it's the most practically important piece for the majority of homeowners.
To claim the mortgage interest deduction, you must itemise your deductions on Schedule A. But itemising only makes sense if your total itemised deductions exceed the standard deduction for your filing status. Since the TCJA nearly doubled the standard deduction in 2018 — and the OBBBA has now made those higher amounts permanent — the majority of homeowners never reach the itemisation threshold.
Here are the exact 2026 standard deduction figures, as published by the IRS following the OBBBA:
| Filing status | 2026 standard deduction | 2025 standard deduction | Change |
|---|---|---|---|
| Single | $16,100 | $15,750 | +$350 |
| Married filing jointly | $32,200 | $31,500 | +$700 |
| Head of household | $24,150 | $23,625 | +$525 |
| Married filing separately | $16,100 | $15,750 | +$350 |
Sources: U.S. Bank / IRS 2026 adjustments; Tax Foundation.
To benefit from the mortgage interest deduction in 2026, a married couple filing jointly must have total itemised deductions — mortgage interest, HELOC interest, state and local taxes (now capped at $40,400 under OBBBA), charitable contributions, and other qualifying expenses — that exceed $32,200. If they don't, the standard deduction is larger and they should claim that instead, receiving zero additional benefit from their mortgage interest.
Tax Policy Center data shows the share of filers who itemise dropped from approximately 30% before the TCJA to around 9–11% after it. With the 2026 standard deduction increases and those amounts now permanent under the OBBBA, that proportion will not increase materially. The practical implication: if you have a modest mortgage balance, a relatively small HELOC, and live in a lower-tax state, there is a reasonable chance the mortgage interest deduction provides you with no actual tax saving — even if your HELOC use technically qualifies.
Worked example: does the deduction actually help Sarah?
Worked example
Sarah in Ohio — checking whether itemising is worth it
Sarah and her husband file jointly. They have a $280,000 mortgage at 6.5% and a $45,000 HELOC at 7.43% which they drew entirely for a kitchen renovation. Both qualify under the use-of-funds test. Their combined loan balance ($325,000) is well below the $750,000 cap.
To beat the standard deduction through itemising, Sarah's total Schedule A deductions need to exceed $32,200. She adds up: mortgage interest ($21,544) + state income tax ($5,200, Ohio) + property taxes ($3,800) + charitable donations ($1,200) = $31,744 total.
Her itemised total of $31,744 is $456 less than the standard deduction of $32,200. She claims the standard deduction. The HELOC interest deduction — despite qualifying on every technical test — provides her with zero actual tax benefit.
Sarah's situation is common. Itemising is more likely to beat the standard deduction for homeowners with large mortgage balances (closer to $750,000), large HELOC balances, significant state income taxes (particularly in California, New York, New Jersey), and substantial charitable giving. If you're unsure whether your situation justifies itemising, a tax professional or even a free online itemisation calculator can give you a quick answer without a full return.
Documentation: what you need to prove the deduction
If you do itemise and claim the HELOC interest deduction, you need to be able to demonstrate both that you paid the interest and that the funds were used for qualifying purposes. The IRS can audit deductions, and a poorly documented home improvement claim is a common audit trigger.
- Form 1098 from your lender — this shows the total mortgage interest paid during the year. Your lender should issue this automatically for any loan on which you paid $600 or more in interest.
- Contractor invoices and receipts for all home improvement work funded by the HELOC. Keep originals and digital copies. These should clearly describe the work done and confirm payment.
- Bank statements showing HELOC draws matched to contractor payments. The paper trail from your HELOC account to the contractor's account strengthens your documentation significantly.
- Permits and planning documents for any structural work. Building permits issued by your local authority confirm the nature and scope of the improvement.
- Before-and-after photographs of the completed work. While not strictly required by the IRS, they provide useful supporting evidence in the event of a query.
- Proration calculation if you used HELOC funds for mixed purposes (see next section). Document the proportion used for qualifying vs. non-qualifying purposes.
The IRS generally has three years from the filing date to audit a return, and up to six years if it suspects substantial underreporting. For records related to home improvements — which may affect your capital gains calculation when you sell the property — keeping documentation for as long as you own the home is prudent.
Mixed-use HELOCs: when you use funds for multiple purposes
Many homeowners use a HELOC for more than one purpose — part for a renovation, part to clear a credit card, part for a new car. When a HELOC is used for both qualifying and non-qualifying purposes, you can only deduct the interest attributable to the qualifying (home improvement) portion.
The IRS requires you to prorate the interest based on the proportion of the outstanding balance that was used for qualifying purposes. If you drew $60,000 from your HELOC — $40,000 for a renovation and $20,000 for debt consolidation — then two-thirds of your HELOC interest is potentially deductible and one-third is not.
Your lender reports total interest paid on Form 1098 — it doesn't know or care what you spent the money on. The proration calculation, the documentation, and the accuracy of the deduction you claim are entirely your responsibility. This is another reason why keeping a clear paper trail of what each HELOC draw was used for is important from the day you open the line, not retrospectively at tax time.
Frequently asked questions
Is HELOC interest tax-deductible in 2026?
Yes — but only if the funds were used to buy, build, or substantially improve the home securing the HELOC; your combined home loan debt is under $750,000; and you itemise your deductions (rather than claiming the standard deduction). All three conditions must be met. If any one is not satisfied, the interest is not deductible.
Did the rules change for 2026?
The One Big Beautiful Bill Act (OBBBA), signed July 4, 2025, made the TCJA individual tax provisions permanent — including the current HELOC deductibility rules and the $750,000 debt limit. These rules were previously scheduled to sunset at the end of 2025. They are now permanent law and will not revert to the pre-2018 framework. Source: IRS.gov OBBBA guidance.
What is the $750,000 debt limit?
Under current IRS rules (Publication 936), you can only deduct interest on the first $750,000 of total qualified home loan debt — your first mortgage plus any HELOC or home equity loan combined. For married couples filing separately, the limit is $375,000. Pre-2018 mortgages are grandfathered at the higher $1 million limit for those specific loans.
What is the 2026 standard deduction?
The 2026 standard deduction is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for heads of household — increased from 2025 levels by approximately 2.2% for inflation. These amounts are now permanent under the OBBBA. To benefit from itemising, your total Schedule A deductions must exceed these thresholds. Sources: U.S. Bank; Tax Foundation.
Is HELOC interest deductible if I use it to pay off credit cards?
No. Using a HELOC to pay off credit cards, personal loans, or any form of consumer debt is a non-qualifying use under IRS Publication 936. The interest on that portion of the HELOC is not deductible, regardless of how the loan is structured. This is one of the most commonly misunderstood aspects of the deduction — and one of the reasons the tax benefit should not be cited as a reason to use a HELOC for debt consolidation.
Do I need Form 1098 to claim the HELOC interest deduction?
Your lender is required to issue Form 1098 if you paid $600 or more in mortgage interest during the year. This form shows the total interest paid and is what you use when completing Schedule A. You should also retain your own supporting records (contractor invoices, bank statements) in case of an audit. Keep these for at least three years after filing — and ideally for as long as you own the home.
Can I deduct HELOC interest on a second home?
Yes — if the HELOC is secured by the second home and the funds are used to buy, build, or substantially improve that property. The $750,000 combined debt limit applies across all qualified residences (your primary home and one second home). Interest on a third or additional property does not qualify.