Borrowing against your home's equity — whether through a home equity loan, a HELOC, or a cash-out refinance — can raise questions about whether the interest you pay is tax-deductible. The general rules are more nuanced than many people assume, and they've changed in recent years. This article explains the broad concepts involved, but tax treatment depends heavily on individual circumstances, how loan proceeds are used, and current tax law, so it should not be treated as a substitute for advice from a qualified tax professional.
The General Concept: Interest Deductibility Depends on Use
Under current federal tax law, interest on home equity debt is generally deductible only when the borrowed funds are used to "buy, build, or substantially improve" the home that secures the loan. This standard applies broadly whether the debt takes the form of a home equity loan, a HELOC, or the additional amount borrowed in a cash-out refinance. Funds used for other purposes — such as paying off credit card debt, funding a vacation, covering tuition, or supporting a business unrelated to the home — are generally treated differently for deduction purposes than funds used directly on the property itself.
This is a meaningful shift from how home equity borrowing was treated in the past, when interest was often deductible regardless of how funds were used, up to certain dollar limits. Because tax rules around mortgage and home equity interest have changed over time and could change again, checking current IRS guidance or consulting a tax professional before assuming a deduction applies is important.
What Counts as "Substantially Improving" a Home
The general concept behind "buy, build, or substantially improve" typically includes things like:
- Adding a room, garage, or other structural addition
- Replacing a roof, HVAC system, or major structural components
- Kitchen or bathroom remodels that add value to the property
- Energy efficiency upgrades in some cases
It generally does not include routine repairs, maintenance, or cosmetic touch-ups that don't add substantial value or extend the home's useful life — though the line between "improvement" and "repair" for tax purposes can be genuinely ambiguous in specific situations, which is another reason individualized professional guidance matters.
Deduction Limits and Itemizing
Even when home equity interest qualifies as deductible under the buy/build/improve standard, several other conditions generally apply:
- You must itemize deductions on your federal return rather than taking the standard deduction. Because the standard deduction has increased significantly in recent years, many taxpayers no longer itemize, which means the mortgage and home equity interest deduction may provide no additional tax benefit for them even if the underlying debt technically qualifies.
- Total mortgage debt limits apply. The combined balance of your primary mortgage and any home equity debt used for qualifying purposes is generally subject to an overall cap for deduction purposes, which has also changed over time depending on when the debt was originated.
- Acquisition debt vs. home equity debt distinctions can matter for older loans originated before certain law changes, adding another layer of complexity for homeowners who've had a mortgage for many years.
Why Documentation Matters
If you use home equity funds for a mix of purposes — for example, part toward a kitchen remodel and part toward paying off a car loan — only the portion used for qualifying home improvements may be eligible for interest deduction consideration, and the IRS generally expects you to be able to substantiate how funds were used. Keeping clear records, invoices, and account statements showing exactly how borrowed funds were spent can be important if you intend to claim any portion of the interest as deductible.
State Tax Treatment May Differ
State income tax rules don't always mirror federal rules exactly. Some states allow deductions that federal law doesn't, or vice versa, and rules vary by state. If you file state income taxes, it's worth checking whether your state's treatment of home equity interest differs from the federal approach, ideally with help from a tax professional familiar with your state's rules.
This Is Not Tax Advice
Nothing in this article should be read as a statement of how your specific home equity borrowing will be treated on your tax return. Tax law is complex, subject to change, and applied differently based on individual facts — including when your loans originated, how you use the funds, whether you itemize, your state of residence, and other factors specific to your situation. Before assuming any interest deduction applies to your home equity borrowing, consult a CPA, enrolled agent, or other qualified tax professional, and consider reviewing current IRS publications on home mortgage interest.
Related Reading
If you're still deciding how to access your equity, our comparisons of home equity loans vs. HELOCs and HELOC vs. cash-out refinance cover the structural and cost differences between these options, separate from tax considerations. Our overview of the pros and cons of borrowing against your home also covers broader financial tradeoffs worth weighing alongside any potential tax treatment.