Is HELOC interest always tax deductible?

No. Under the Tax Cuts and Jobs Act (TCJA) and IRS Notice 2018-32, HELOC interest is deductible only when the loan proceeds are used to buy, build, or substantially improve the home securing the HELOC. If you used a HELOC for debt consolidation, living expenses, or any non-home-improvement purpose, that interest is not deductible — regardless of when the HELOC was originated.

What does IRS Notice 2018-32 say about HELOC deductions?

IRS Notice 2018-32 clarifies that the TCJA suspended the deduction for home equity interest used for non-acquisition purposes through December 31, 2025 (and potentially beyond unless Congress acts). The deduction is preserved only when interest is allocable to buying, building, or substantially improving the qualified home that secures the debt. The Notice applies to all home equity loans and HELOCs regardless of origination date.

What is the $750,000 acquisition debt limit for HELOCs?

For loans originated after December 15, 2017, the combined acquisition debt limit is $750,000 for married filing jointly ($375,000 for married filing separately). This cap covers your first mortgage plus any qualifying home equity debt combined. If your primary mortgage already uses the full $750,000, additional HELOC interest is not deductible even if the proceeds were used for home improvement. Source: IRS Publication 936.

Can I deduct HELOC interest if I used the funds for home improvement?

Yes — if you used a HELOC to buy, build, or substantially improve the home that secures the loan, and the combined acquisition debt stays under $750,000 (married filing jointly), the interest qualifies for deduction. Substantial improvement means a capital improvement — replacing a roof, adding a room, finishing a basement — not routine maintenance or repairs. Keep all receipts, contractor invoices, and building permits as documentation.

What happens if I used a HELOC for both home improvement and debt payoff?

You must prorate the interest. Only the portion of the HELOC used for qualifying home improvement is eligible for deduction. For example, if you drew $100,000 and used $60,000 for a kitchen remodel and $40,000 to pay off a car loan, only 60% of the HELOC interest qualifies. Maintain clear records of each draw's purpose — the IRS can request documentation if you claim a mixed-use deduction.

Do pre-TCJA HELOCs (originated before December 2017) get different treatment?

Not under current law. The TCJA suspended the home equity interest deduction for non-acquisition use regardless of when the HELOC was originated — the origination date does not grandfather the deduction for non-home-improvement uses. Both old and new HELOCs are subject to the use-based test under IRS Notice 2018-32. The TCJA's individual provisions were set to expire after 2025 — check with a tax professional for the current legislative status.

What documentation do I need to support a HELOC interest deduction?

To substantiate the deduction, keep: (1) contractor invoices and receipts showing what the HELOC funds were spent on, (2) building permits for any permitted work, (3) your lender's Form 1098 showing total HELOC interest paid during the year, and (4) for mixed-use HELOCs, a clear draw-by-draw accounting. A tax professional should review your documentation before you claim the deduction. Source: IRS Publication 936.

Does the HELOC deduction apply to investment properties or second homes?

The deduction applies to a 'qualified home' — defined as your main home or one second home (that you use personally). A HELOC on a purely rental or investment property is not subject to the home mortgage interest deduction rules; instead, that interest may be deductible as a rental expense under IRS Schedule E. Consult IRS Publication 527 and a tax professional if you have a HELOC on a property you rent out.

Can I deduct HELOC interest if I used it to invest in stocks or a business?

No. Using HELOC proceeds to invest in stocks, fund a business, or for any purpose other than improving the home that secures the HELOC makes the interest non-deductible under the home mortgage interest rules. It may potentially qualify as investment interest expense (IRS Form 4952) or business interest expense under different rules — but that is a separate analysis requiring a tax professional.

When does the HELOC interest deduction suspension expire?

The TCJA suspended the deduction for non-acquisition home equity interest through December 31, 2025. If Congress does not act to extend the TCJA provisions, the pre-2018 rules (which allowed broader deductions) could return for 2026 and beyond. However, as of mid-2026, Congress has not yet acted on TCJA extenders — consult a tax professional or the IRS for the current legislative status before filing.

Is HELOC interest tax deductible in 2026?

HELOC interest is deductible only if the loan is used to buy, build, or substantially improve the home that secures it — per IRS Publication 936 and IRS Notice 2018-32. If you used a HELOC to consolidate debt, pay medical bills, or fund living expenses, that interest is not deductible under the Tax Cuts and Jobs Act (TCJA). The rule applies regardless of when the HELOC was originated.

The Tax Cuts and Jobs Act (TCJA), effective for tax years starting January 1, 2018, significantly changed the rules for home equity interest deductions. The IRS clarified the application in IRS Notice 2018-32. Here's what the rules actually say.

The core rule: use matters, not product type

Under IRS Publication 936, you can deduct HELOC interest only if the loan is used to buy, build, or substantially improve the qualified home that secures the loan. The product label — HELOC, home equity loan, cash-out refinance — does not determine deductibility. What the money was used for does.

Deductible: HELOC used to add a room, replace a roof, finish a basement, or otherwise substantially improve the home that is the collateral.
Not deductible: HELOC used to pay off credit card debt, fund a vacation, pay medical bills, invest in another property, or cover living expenses.
Mixed use: If you used a $100,000 HELOC to remodel ($60,000) and pay off car debt ($40,000), only the $60,000 portion that improved the home is eligible for interest deduction. You must prorate the interest.

The $750,000 acquisition debt limit (TCJA)

Even if your HELOC qualifies as home acquisition debt, there's a cap. For loans originated after December 15, 2017, the combined acquisition debt limit is $750,000 for married filing jointly ($375,000 for married filing separately). This is the combined total of your first mortgage plus any qualifying home equity debt. If your primary mortgage already uses the full $750,000, additional HELOC interest is not deductible even if used for home improvement.

Pre-TCJA HELOCs (originated before December 16, 2017)

The TCJA suspended the deduction for home equity interest used for non-acquisition purposes through December 31, 2025 — the TCJA's individual provisions are scheduled to expire after 2025 unless extended by Congress. As of the 2026 tax year, this suspension is active. Check with a tax professional for the most current legislative status before filing.

Documentation: how to support a deduction claim

Keep all records showing what the HELOC proceeds were spent on — contractor invoices, building permits, receipts.
For mixed-use HELOCs, maintain a clear accounting of which draws were used for qualifying improvement vs. other uses.
Your lender will issue a Form 1098 reporting HELOC interest paid during the year. That's the figure you start with — but the deductible portion may be less if use was mixed or if you exceeded the debt limit.
A tax professional (CPA or enrolled agent) should review your specific situation before you claim the deduction. IRS Publication 936 is the primary reference document.

Verified: IRS rules on HELOC interest deductibility

IRS Notice 2018-32 clarifies that under the Tax Cuts and Jobs Act, the deduction for interest on home equity loans and home equity lines of credit is allowed only for interest that is allocable to buying, building, or substantially improving the qualified home that secures the debt. — Internal Revenue Service — Notice 2018-32
IRS Publication 936 specifies that home equity debt interest is deductible only if used for acquisition purposes (buying, building, or substantially improving the securing home), and that the combined acquisition debt limit is $750,000 for married filing jointly for loans originated after December 15, 2017. — Internal Revenue Service — Publication 936 (Home Mortgage Interest Deduction)
The TCJA suspended the deduction for interest on home equity loans and lines of credit used for purposes other than buying, building, or substantially improving the home through December 31, 2025 (with potential expiration unless Congress extends). — Internal Revenue Service — Tax Cuts and Jobs Act overview

Key takeaways

HELOC interest is only deductible when proceeds are used to buy, build, or substantially improve the home securing the HELOC.
Using a HELOC for debt consolidation, living expenses, or non-home purposes makes the interest non-deductible under TCJA.
The combined acquisition debt limit is $750,000 (married filing jointly) for loans originated after December 15, 2017.
Mixed-use HELOCs require prorating — only the home-improvement portion of interest qualifies.
IRS Notice 2018-32 and IRS Publication 936 are the primary authorities. Consult a tax professional before claiming the deduction.

A HELOC used for debt payoff or personal expenses is not deductible

Many homeowners assume HELOC interest is automatically deductible because it's home-secured. Under TCJA it is not — use determines deductibility, not product type. If you're opening a HELOC for debt consolidation or personal expenses and expecting a tax break, revisit that math with a CPA before you close.