7 Rules for Deducting Home Equity Loan Interest

Last Updated: October 29, 2026

Table of Contents

• How the IRS Treats Home Equity Loan Interest Today
• Home Equity Loan Interest Deduction Rules That Decide Eligibility
  • The debt limit is where most guides go vague
  • Tax-year distinctions that change the answer
  • The use test is separate from the limit test
• Qualifying Uses: Buying, Building, or Substantially Improving Your Home
• Home Equity Loan Interest and Home Improvements: What Counts
• Home Equity Loan Tax Deduction Examples for Mixed-Use Proceeds
• When You Must Itemize: The Home Equity Loan Tax Deduction Itemize Decision
  • The break-even worksheet
  • A worked example
  • Why the interest alone rarely flips the decision
  • Filing errors to avoid
• Records, Reporting, and Edge Cases to Plan For
• Planning a Home Equity Borrowing Strategy With The Modern Lending Group
• Frequently Asked Questions

How the IRS Treats Home Equity Loan Interest Today

The short answer: home equity loan interest is tax deductible only when the borrowed funds buy, build, or substantially improve the home that secures the loan. That rule has applied since the Tax Cuts and Jobs Act took effect in 2018.

Most guides get this wrong: they treat the deduction as a property of the loan itself. It is not. The IRS looks at what you did with the money, not what the lender called the product.

The IRS guidance on home mortgage interest is clear on this point. Deductible interest depends on how the loan proceeds were used.

Two neighbors with identical home equity loans can therefore file very differently.

Below, we explain the rules, how mixed-use proceeds get split, and when itemizing may affect the deduction.

Home Equity Loan Interest Deduction Rules That Decide Eligibility

Seven rules control whether home equity loan interest survives on your return. The first four are pass/fail gates; the last three determine how much you can actually claim.

1. Qualified use. The money must buy, build, or substantially improve the home securing the debt.
2. Qualified residence. The property must be your main home or a second home you do not rent out full time.
3. Secured debt. The loan must be secured by that home, not unsecured.
4. Debt limit. The loan balance must fit within the mortgage debt limit for your filing status.
5. Itemizing. You must itemize deductions instead of taking the standard deduction.
6. Documentation. You need records tracing the funds to the improvement.
7. Filing status rules. Married filing separately faces a lower ceiling.

Miss any one of these and the interest becomes personal, nondeductible interest. That is the whole game.

The debt limit is where most guides go vague

Two mechanics matter here:

• The limit applies to the debt, not the interest rate or the lender. A low-rate home equity loan does not get a bigger ceiling, and a high-rate one does not get a smaller one.

A common mistake is assuming the lender's label settles it. A cash-out refinance and a home equity loan follow the same use test.

Tax-year distinctions that change the answer

The rules are not static, and a guide that ignores the calendar can steer you wrong. The TCJA suspended the old treatment of home equity indebtedness, before 2018, interest on up to $100,000 of home equity debt was deductible regardless of how the money was used. Since 2018, that standalone home equity deduction is gone; the only path is the qualified residence interest rules described above, subject to the $750,000/$375,000 limits. Those TCJA limits are scheduled to run through 2025, so confirm the rule for the specific tax year you are filing before you rely on a number. The IRS guidance on home mortgage interest and IRS Publication 936 on home mortgage interest are the controlling sources for the year in question.

The use test is separate from the limit test

Passing the debt limit does not make interest deductible. The proceeds still have to buy, build, or substantially improve the home that secures the loan. A borrower under the $750,000 cap who paid off credit cards gets no deduction. Run both tests, in that order, before you claim a dollar.

Seven rules decide whether home equity loan interest survives on your return, the first four are pass/fail gates, the last three determine how much you can claim.

Qualifying Uses: Buying, Building, or Substantially Improving Your Home

The IRS Publication 936 on home mortgage interest draws that line between improvements and repairs. Keep it in mind when you plan a project.

Home Equity Loan Interest and Home Improvements: What Counts

The home equity loan interest and home improvements pairing is where documentation earns its keep. The IRS wants a clear trail from loan dollars to the project.

Start with the lender statement showing the disbursement date and amount, then match contractor invoices and permits to that same window.

Watch out: paying a contractor in cash with no invoice can sink the deduction in an audit. You have the project, but you cannot prove the loan paid for it.

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There is also a timing issue. The interest must be paid during the tax year you claim it. A project that spans two calendar years needs interest allocated to each year's return.

Home Equity Loan Tax Deduction Examples for Mixed-Use Proceeds

This is also where a cash-out refinance gets complicated. The portion of new debt that funds improvements can qualify. The portion that pays off old debt or personal expenses usually does not. For a closer look at how that split is treated, see our breakdown of whether cash-out refinance interest is tax deductible.

When You Must Itemize: The Home Equity Loan Tax Deduction Itemize Decision

The home equity loan tax deduction itemize decision comes down to one comparison: your total itemized deductions versus the standard deduction. If itemizing does not beat the standard amount, the deduction delivers nothing. Here is the worksheet and a worked example.

The break-even worksheet

Work through these lines in order. Use the current standard deduction for your filing status and tax year, it changes annually, so pull the current figure rather than relying on memory.

1. Mortgage interest (Form 1098, Box 1). Enter the interest your lender reported. If part of the loan fails the use test, enter only the qualifying share.
2. Home equity loan interest (qualifying share only). Add the deductible portion you calculated from your use allocation.
3. State and local taxes. Enter income or sales taxes plus property taxes, subject to the state and local tax (SALT) cap. The cap is a fixed dollar amount per return and is lower for married filing separately.
4. Charitable contributions. Cash and noncash gifts to qualified organizations.
5. Medical expenses above the threshold. Only the amount exceeding the adjusted gross income floor counts.
6. Other eligible itemized deductions. Include any that apply to you.
7. Total itemized deductions. Sum lines 1 through 6.
8. Standard deduction for your filing status. Enter the current amount.
9. Compare line 7 to line 8. If line 7 is higher, itemize. If line 8 is higher, take the standard deduction and the home equity interest delivers no tax benefit.

A worked example

Suppose a married couple filing jointly has $9,000 of first-mortgage interest reported on Form 1098 and a $60,000 home equity loan used entirely for a kitchen remodel, generating $4,200 of interest. Their other itemizable amounts are $6,000 of state and local taxes (within the SALT cap) and $2,000 of charitable gifts. Their itemized total is $9,000 + $4,200 + $6,000 + $2,000 = $21,200.

If the standard deduction exceeds $21,200, itemizing gains them nothing and the home equity interest is wasted as a tax matter. If it is lower, they itemize and the full $4,200 is in play. The home equity interest is one line in a larger sum, and it only matters at the margin.

Why the interest alone rarely flips the decision

A modest home equity loan often pushes a household just over the line, but the interest alone rarely does it. The decision depends on your whole deduction picture, mortgage interest, SALT, charity, and medical. Households that already itemize get the home equity interest as a marginal add; households taking the standard deduction usually stay there unless the loan is large and fully qualifying.

Filing errors to avoid

If itemizing wins, report the qualifying interest on Schedule A. The IRS instructions for Schedule A show where each line lands. If the standard deduction wins, the home equity interest is not deductible for that year, and that is a planning fact worth knowing before you borrow, not after.

Records, Reporting, and Edge Cases to Plan For

Your lender reports mortgage interest on Form 1098, but that form does not separate qualifying from nonqualifying use. You do that work. Keep a folder with the closing disclosure, disbursement records, invoices, and proof of payment.

Reporting follows a set order:

1. Confirm the loan is secured by a qualified residence.
2. Confirm the proceeds went to a qualifying purpose.
3. Calculate the deductible share of interest.
4. Report it on Schedule A when you itemize.
5. Retain records for at least three years after filing.

Edge cases matter: a second home rented part of the year changes the analysis, married filing separately splits the debt limit, a home office can shift part of the interest to a business schedule, and a refinance restarts the use test on the new debt.

The IRS instructions for Schedule A confirm where the interest lands on the return.

Planning a Home Equity Borrowing Strategy With The Modern Lending Group

Our tailored mortgage solutions are designed for first-time buyers, investors, and refinancers, and we offer credit wellness guidance to help strengthen your financial profile.

The rules are simple once you separate loan product from loan purpose. If you want help mapping a borrowing strategy that fits your goals, our team can walk you through it. The Modern Lending Group offers a personalized mortgage experience, low-cost services, and credit wellness guidance designed to strengthen your financial profile. Reserve an appointment with a lending advisor and get a plan built around your situation.

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