Updated September 02, 2026
Quick answer
This is general information, not tax advice. The treatment of interest on home-secured borrowing depends on what the proceeds were used for, how well that use is documented, and your own circumstances — there is no single answer that applies to every reader. The primary sources are IRS Publications 936 and 535. Confirm your position with your CPA before relying on any treatment.
Why There Is No Single Answer
People want a yes or a no here, and the honest response is that the question is not well formed without more facts.
Interest on borrowing is generally categorised by what the borrowed money was used for, not simply by what secured it. That means the same HELOC can be treated differently depending on where the proceeds went, and a single line drawn for several purposes can have its interest split between categories.
So an article cannot tell you your answer. What it can do is set out the shape of the question so that the conversation with your accountant is a short one.
The Two Primary Sources
| Source | What it covers |
|---|---|
| IRS Publication 936 | Home mortgage interest — the rules on interest secured by a residence, and how the use of the proceeds bears on it |
| IRS business expense guidance | Deductible business expenses, including interest on borrowing used in a trade or business |
Both are federal and current. Neither replaces advice on your own facts, and state treatment can differ from federal.
Tracing Is the Practical Issue
Whatever the treatment turns out to be, the ability to support it rests on being able to show where the money went. That is the part you control, and the part most often neglected.
What makes tracing straightforward:
- Draw for one purpose at a time rather than taking a lump and spending it across categories
- Move business draws into the business account directly, rather than through a personal account
- Keep the paperwork for what the money bought, matched to the draw
- Avoid mixing a business draw with personal spending in the same account and period
- Tell your accountant when it happens, not at year-end
Money that lands in a personal account and is spent from there is considerably harder to trace afterwards than money that went straight to the business.
What Your Accountant Will Want
Turning up with these makes the question answerable in one conversation:
- The loan documents, showing what secures the line and when it was taken
- A schedule of draws with dates and amounts
- What each draw funded, with supporting invoices
- The account trail from draw to expenditure
- Your entity structure, since treatment can depend on how the business is organized
Without those, an accountant is guessing, and a guess is not a position you would want to defend.
Do Not Let the Tax Question Drive the Decision
A closing caution, because it is a real pattern.
The treatment of the interest is a second-order consideration next to the fact that the borrowing is secured by your home. A favorable treatment does not make an unwise loan wise, and the difference it makes is small relative to what is at stake if the business does not work — see what happens if the business fails.
Decide whether to pledge the house on the merits of the borrowing. Then ask your CPA how to treat the interest.
This page is general information and does not constitute tax or legal advice. Axiant Partners is a financing brokerage, not a tax adviser. Confirm your own position with a qualified CPA before relying on any treatment described here.
Frequently Asked Questions
Is HELOC interest deductible if I use it for my business?
This is general information, not tax advice. The treatment depends on what the proceeds were used for, how that use is documented, and your circumstances, so there is no answer that applies to every reader. IRS Publications 936 and 535 are the primary sources. Confirm your position with your CPA.
Does it matter what I spent the money on?
Yes — use is central. Interest on borrowing is generally categorised by what the borrowed money funded rather than simply by what secured it, which is why a single line drawn for several purposes can have its interest split between categories.
What is interest tracing?
Following borrowed money from the draw to what it actually paid for. It is what supports any treatment you claim, and it is far easier when a draw goes straight into the business account for one purpose than when it lands in a personal account and is spent from there.
What records should I keep?
The loan documents, a schedule of draws with dates and amounts, what each draw funded with supporting invoices, and the account trail from draw to expenditure. Also tell your accountant as it happens rather than at year-end.
Should the tax treatment decide whether I use a HELOC?
No. It is a second-order consideration next to the fact that the borrowing is secured by your home. A favorable treatment does not make an unwise loan wise. Decide on the merits of the borrowing, then ask your CPA how to treat the interest.
Sources & Further Reading
- IRS Publication 936: Home Mortgage Interest Deduction — The federal rules on when home-secured interest is deductible and how the use of the proceeds affects it.
- IRS Guide to Business Expense Resources — Federal guidance on deductible business expenses, including interest on borrowing used in a trade or business.
- CFPB: What is a home equity loan? — Consumer Financial Protection Bureau explainer on home equity borrowing, including how draw and repayment periods work.
Figures above describe ranges commonly seen across lenders and reflect published guidance as of the date on this page. Confirm current terms with the cited source or your lender before acting.