The Truth About Home Equity Interest Tax Deductibility
I am going to tell you something that might surprise you. Most of what people think they know about deducting home equity interest is wrong. They remember the old rules — before 2018 — when you could deduct interest on up to $100,000 of home equity debt no matter what you used the money for. Those rules are gone. They have been gone for eight years. But I still have clients walk into my kitchen and say, “My CPA told me I can deduct my HELOC interest.”
Maybe. Maybe not. It depends entirely on what you spent the money on.
The Tax Cuts and Jobs Act of 2017 fundamentally changed the deductibility of home equity interest. Starting in 2018, you can only deduct interest on home equity debt if the proceeds are used to buy, build, or substantially improve the home that secures the loan. That is it. No more deducting interest for credit card consolidation, college tuition, medical bills, or buying a boat.
Let me walk you through exactly what the rules are, where the gray areas live, and how to avoid an expensive surprise from the IRS.
The old rule versus the new rule. Before 2018, you could deduct interest on up to $100,000 of home equity debt regardless of use. That was on top of the $1 million limit for acquisition debt (mortgage used to buy or build the home). So a homeowner could have a $300,000 mortgage plus a $100,000 HELOC, and deduct interest on all $400,000, even if the HELOC was used for a vacation.
The TCJA changed everything. Starting in 2018 and continuing through 2026 — the TCJA provisions are scheduled to expire at the end of 2025, but they have been extended through 2026 — interest on home equity debt is deductible only if the proceeds are used for acquisition or home improvement. And the total combined limit for acquisition debt plus home equity debt is now $750,000 for married couples filing jointly ($375,000 for single filers). Not $1 million plus $100,000. A single, combined cap.
So if you have a $700,000 mortgage to buy your home, you have only $50,000 of room left for deductible home equity interest. If you borrow more than that, the interest on the excess is not deductible, even if you use it for home improvements.
The “substantially improve” test is where most people get tripped up. The IRS says you can deduct interest on home equity debt used to “substantially improve” your home. That means the improvement must add value, prolong the home’s useful life, or adapt it to new uses. Think new roof, new HVAC, kitchen remodel, bathroom addition, finished basement, new windows, solar panels.
Routine repairs and maintenance do not count. Painting a room? Not deductible. Fixing a leaky faucet? Not deductible. Replacing a broken garage door opener? Not deductible. The line between improvement and repair is fuzzy. The IRS looks at whether the expense restores the property to its original condition (repair) or enhances it beyond its original state (improvement).
I had a client in Tampa who took a $30,000 HELOC to replace his AC and his roof. Both are clearly improvements. He kept his receipts. He deducted the interest. No problem. His neighbor took a $20,000 HELOC to repaint the exterior, replace a few broken fence boards, and clean the carpets. None of those are substantial improvements. The neighbor’s interest was not deductible. He found out when he was audited.
The tracing rule is the killer. You cannot just take a HELOC, mix the money with your other funds, and claim the interest is deductible because you also spent money on home improvements. The IRS requires you to trace the borrowed funds directly to the improvement expense.
Here is what that means. If you take a $50,000 HELOC deposit into your checking account, and over the next six months you spend $30,000 on a kitchen remodel and $20,000 on credit card bills, only the interest on the $30,000 is potentially deductible. But you have to prove it. You need a paper trail showing that the specific dollars borrowed went to the specific improvement.
The easiest way is to keep the HELOC funds in a separate account. Open a dedicated account for the HELOC draw. Pay for home improvements directly from that account. Do not mix it with your regular checking. Do not pay for groceries, utilities, or credit cards from that account. If you do, the tracing becomes messy, and the IRS can disallow the deduction.
I have seen CPAs advise clients to “just keep good records.” But when an audit happens, “good records” means canceled checks, invoices, and a clear line from the loan to the expense. If your HELOC money went into a checking account that also had payroll deposits and Social Security payments, good luck tracing it.
**The $750,000 cap applies to the total of your first mortgage plus your home equity debt.** Many people do not realize this. They think their first mortgage is one bucket and their HELOC is another. They are not. The combined balance that generates deductible interest cannot exceed $750,000 ($375,000 if single).
So if you have a $600,000 first mortgage and you take a $100,000 HELOC for a home addition, your total acquisition debt is $700,000. That is under the $750,000 cap. All the interest on both loans is potentially deductible (assuming the HELOC proceeds are used for improvement). If you have a $700,000 first mortgage and a $100,000 HELOC, your total is $800,000. Only the interest on $750,000 of that debt is deductible. The interest on the extra $50,000 is not, even if you used it for home improvements.
For Florida homeowners, where home values have risen significantly over the past decade, the $750,000 cap is a real constraint. In Tampa, many homes are now worth $500,000, $600,000, even $800,000 or more. If you bought recently with a large mortgage, you may have little room left for deductible home equity debt.
The standard deduction change made deductibility less valuable for many people. Even if your interest is technically deductible, you only benefit if you itemize deductions. The TCJA nearly doubled the standard deduction. For 2026, the standard deduction is $15,000 for single filers, $30,000 for married couples filing jointly. If your total itemized deductions — mortgage interest, state and local taxes (capped at $10,000), charitable contributions, medical expenses — do not exceed the standard deduction, you get no tax benefit from deducting your HELOC interest.
In Florida, we have no state income tax, so the state and local tax deduction is less valuable than in high‑tax states. Many Florida homeowners find that their mortgage interest plus property taxes (limited to $10,000) do not exceed the $30,000 standard deduction for couples. So they take the standard deduction. Their HELOC interest — even if it is for home improvements — gives them zero tax benefit.
I have had clients insist on getting a HELOC instead of a personal loan because “the interest is tax deductible.” When I ask about their other deductions, they realize they have not itemized in years. They are paying a higher HELOC rate for a tax benefit they will never receive. That is a mistake.
The documentation you must keep if you want to deduct. If you are certain you will itemize and your HELOC interest qualifies, keep the following: the loan statement showing the date and amount of the draw; the cancelled check or electronic transfer receipt; the invoice from the contractor or store where you bought the improvement materials; proof of payment to the contractor; and before‑and‑after photos of the improvement. The photos are not required by law, but they make an audit much easier.
The IRS has been known to disallow home equity interest deductions when the taxpayer cannot prove the funds were used for improvements. In one tax court case, the taxpayer took a HELOC, deposited it into his general account, and wrote checks for both a new roof and a vacation. He claimed the entire interest was deductible because he also spent money on the roof. The IRS disallowed the portion related to the vacation. The court agreed.
Do not let that be you. Keep your HELOC funds separate. Document everything.
What about reverse mortgages? Interest on a reverse mortgage is not deductible until you pay it off. That usually happens when you sell the home or die. At that point, the accumulated interest becomes part of the loan payoff. Your estate or heirs might be able to deduct it on the final tax return, depending on the value of the home and the loan balance. But for most seniors, reverse mortgage interest provides no annual tax benefit. That is fine — the benefit is no monthly payment, not a tax deduction.
The 2026 and 2027 outlook. The TCJA provisions are scheduled to expire at the end of 2025, but they have been extended through 2026. What happens after that depends on Congress. If the TCJA expires, the old rules could return — $1 million cap for acquisition debt, plus a separate $100,000 cap for home equity debt regardless of use. That would make HELOC interest deductible again for many purposes, including debt consolidation.
But do not count on it. Congress could extend the TCJA again, modify it, or let it expire partially. Tax planning based on future changes is guesswork. Assume the current rules will stay for the foreseeable future. If they change in your favor, great. If they do not, you are not caught off guard.
The Florida homestead angle does not affect deductibility. Florida’s homestead exemption protects your home from creditors, but it has nothing to do with the IRS. You can have full homestead protection and still not deduct your HELOC interest if the funds are not used for improvements. The two laws operate independently.
A real example from Tampa. A client of mine, a retired engineer in Westchase, wanted to consolidate $40,000 in credit card debt. He heard that HELOC interest was tax deductible. He almost opened a HELOC before calling me.
I walked him through the numbers. His total itemized deductions were $28,000 — mortgage interest, property taxes, and charitable gifts. The standard deduction for a married couple was $30,000. He would not itemize. So the HELOC interest would give him zero tax benefit. Instead, he took a home equity loan at a fixed rate of 7.8%. The rate was slightly higher than a HELOC, but he did not need the variable feature. He paid off his credit cards and saved $9,000 a year in interest. The tax deductibility was irrelevant.
He thanked me later. “I almost made a decision based on a rule I did not understand.”
What you should do right now. First, determine whether you itemize deductions. Look at your last tax return. If you took the standard deduction, you are not itemizing. Any HELOC interest you pay will not reduce your taxes. So ignore deductibility in your decision. Focus on getting the lowest interest rate and fees.
Second, if you itemize, calculate how much room you have under the $750,000 cap. Add your first mortgage balance to any existing home equity debt. If the total is below $750,000, you have room. If it is above, only part of your interest may be deductible.
Third, if you plan to use a HELOC for home improvements, keep the funds separate. Open a dedicated account. Pay contractors directly from that account. Keep every receipt and invoice. Take before‑and‑after photos. You will thank yourself if the IRS ever asks.
Fourth, do not take a HELOC for non‑improvement purposes — debt consolidation, tuition, medical bills, cars, vacations — and expect a tax deduction. You will not get one. The law is clear.
Fifth, talk to a tax professional. I am not a CPA. I am not an enrolled agent. I have read the IRS rules and I have seen how they apply to real people, but every tax situation is different. Spend a few hundred dollars on professional advice. It could save you thousands in disallowed deductions and penalties.
The bottom line on deductibility. The old rule — deduct HELOC interest for anything — is dead. It died in 2018. Some people still act like it is alive. They are wrong. The new rule is simple: home improvement only, up to $750,000 total mortgage debt, and only if you itemize.
Do not let a tax myth drive your borrowing decisions. Run the numbers. Talk to a professional. And if you are not sure, assume the interest is not deductible. That way, any deduction you get is a pleasant surprise, not a rude awakening.
— Maggie, Tampa
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