Can a Primary HELOC Be Deducted From Rental Income?

HELOC From Primary Deducted From Rental Income From Investment — The Quick Read: This question really splits into two parts. On the tax side, interest on a primary-residence HELOC can offset rental income on Schedule E. But this only works if the draw was actually spent on the rental. It doesn’t matter which house sits on the deed. On the underwriting side, things work differently. A primary HELOC payment does not get netted against rental income inside a DSCR calculation. That’s because DSCR loans qualify on the subject property’s own rent-to-payment math. They don’t look at the borrower’s outside debts.

These are two different questions. Each one has its own rulebook. Mixing them up is where most investors get tripped up.

Key Terms Defined

Interest tracing — the IRS rule that follows where borrowed money actually went, not which property secures the loan.

DSCR (Debt Service Coverage Ratio) — the ratio a lender uses on an investment-property loan, comparing the rent a property produces against its own monthly obligation.

PITIA — principal, interest, taxes, insurance, and any HOA dues rolled into one monthly figure.

CLTV (Combined Loan-to-Value) — every lien on a property added together, divided by the property’s value.

Passive activity loss — the Section 469 limit on how much rental-related loss, including allocated interest, can offset a taxpayer’s other income in a given year.

Schedule E — the tax form where rental income and expenses, including traced mortgage interest, get reported.

Does It Matter Which Property Secures the HELOC?

No, it doesn’t. The IRS doesn’t care which house is on the loan documents. It cares where the money went. That’s the entire point of the interest-tracing doctrine under Treasury Regulation §1.163-8T. This rule allocates debt and interest to expenditures based on how the proceeds were actually used. It doesn’t matter which property is pledged as collateral.

Current IRS Publication 936 restricts the personal, Schedule A home-mortgage-interest deduction. That deduction only covers funds spent buying, building, or substantially improving the home securing the loan. Read alone, that sounds like it kills any rental-related write-off for primary-home HELOC interest. It doesn’t. That restriction only governs the personal deduction pathway. The IRS made this explicit in News Release IR-2018-32. Taxpayers can often still deduct interest on a home equity loan or HELOC no matter how the loan is labeled by the bank. The label never controls the outcome. The use of the funds does.

Here’s how it plays out in practice. Say a HELOC is drawn against a primary residence and spent on a rental purchase. That interest follows the rental use. It gets reported on Schedule E as a rental expense. And it isn’t capped by the $750,000 acquisition-debt limit that applies to the personal deduction. That limit only governs the primary-residence pathway. One 2025 wrinkle is worth knowing. The One Big Beautiful Bill Act made the restriction on the personal home-equity deduction permanent, instead of letting it sunset. This comes from a Cozen O’Connor analysis of the Act. That permanence only touches the personal Schedule A pathway. It never touches the rental-tracing pathway, since that interest was never claimed as home mortgage interest to begin with.

What If the HELOC Draw Only Partly Funded the Rental?

Then only the rental-allocated share is deductible against rental income. The rest follows wherever else it went. Say a HELOC funded a down payment on a rental and also paid for a kitchen remodel at the primary residence. In that case, the interest has to be split pro rata between the two uses. According to TaxShark, the IRS requires precise allocation based on tracing rules any time HELOC proceeds serve more than one purpose. The rental-allocated portion is reported as an investment interest expense on Schedule E. It’s subject to passive activity loss limits under Section 469. It is not subject to the 2% AGI floor that applies to some other itemized deductions.

The paper trail matters more than the label on the loan. Keep draw-by-draw records of what each dollar paid for and when. That’s what an examiner will ask to see if the allocation is ever questioned.

Does a Primary HELOC Payment Get Subtracted From Rental Income on a DSCR Loan?

It doesn’t. A DSCR loan calculation stays isolated to the subject property. It compares rent against that property’s own PITIA. A payment on a HELOC secured by a different property — primary or otherwise — sits outside that math entirely. That’s a structural difference from a conventional mortgage. There, a personal debt-to-income calculation would count that HELOC payment against the borrower.

A standard home equity line works the opposite way. It qualifies the borrower’s personal credit, income, and debt-to-income profile. It does not look at the income of whichever property secures it. That’s true whether the line sits on a primary residence or on an investment property. The collateral property’s rental income is irrelevant to how a HELOC itself gets approved. Some investors have had a HELOC application denied because tax returns showed too little income. They’re running into exactly this problem — a personal-income underwriting model, not a property-income one.

Primary-Residence HELOC vs. Investment-Property HELOC

These two products aren’t interchangeable. The qualification bar shifts hard between them across Lendmire’s home equity network:

Here’s one detail worth knowing before shopping this product. An investment-property line caps at $500,000, and a full appraisal only kicks in above that threshold. Because of that, an investment HELOC in this network structurally sits in the automated-valuation lane almost every time. Most close without a traditional appraisal at all. It’s also worth flagging that neither program lets an LLC, corporation, or trust other than an individual or revocable living trust hold title. A property already deeded into an LLC needs a vesting change to use this product. Or it needs a different structure entirely. That’s one reason investors scaling past one or two rentals tend to end up looking at who offers a HELOC on an investment property, then pivoting away from a standalone line altogether.

Why Investors Scaling Past One Rental Usually Move to a DSCR Loan

A DSCR loan doesn’t run a personal debt-to-income calculation at all. Because of that, existing obligations — a primary HELOC among them — don’t cap how much an investor can borrow the way they would under a conventional or standard-HELOC framework. The qualification test is simple: does the property’s rent cover its own payment. That’s a very different question than “can this borrower’s income support another line of credit.”

DSCR loans are designed for non-owner-occupied investment properties. Because they’re business-purpose investor loans, they get reviewed differently than a standard owner-occupied mortgage.

Here are the practical numbers, drawn from across Lendmire’s wholesale network. Purchase transactions typically land at 75%-80% loan-to-value. Select high-leverage programs can reach 85% for borrowers with roughly a 700+ credit profile. A cash-out refinance on an existing rental generally tops out around 75% LTV. About six months of seasoning is the common expectation across the network. Coverage floors vary by program. Many set their line at 1.00x, though that’s a program-specific floor, not a universal rule. And coverage below 1.00 isn’t automatically a dead end — a handful of lenders in the network will still work with sub-1.00 coverage, with leverage and terms adjusted to compensate.

Credit requirements run on a sliding scale. A 620 floor shows up in parts of the network. Most programs prefer something closer to 660. Crossing into the 700s is what unlocks the strongest leverage tiers. Loan sizes generally run up to $3,000,000 on standard programs, with smaller balances available through select lenders. Above $2,500,000, the network generally holds to 30-year fixed structures. Reserve requirements vary by lender, leverage, loan size, and transaction type. They commonly land around six months of PITIA, though conservative rate-term files at modest leverage under $1,500,000 can see reserves waived. Loans above roughly $2,500,000 typically step up to nine months.

Unlike the home equity line, a DSCR loan can typically close in an LLC, subject to lender program eligibility. That matters for investors who’ve already titled properties in an entity, or who want to keep growing without that limitation. For a fuller breakdown of how the rent-to-payment math actually works, Lendmire’s complete DSCR loans guide walks through the mechanics in more detail. Investors comparing this path against pulling equity without full income documentation may also want to look at how a DSCR refinance works without traditional income verification.

The Edge Cases Investors Miss

The tracing rule runs both directions. Say a cash-out refinance is pulled off the rental property itself and spent on something personal — a vacation home, a car. That does not generate a deductible rental expense, even though the debt is secured by an income property. The deduction follows the use of the money every time. It never follows the collateral.

Conversion timing trips people up too. Picture a HELOC drawn while a property is still a primary residence, then used after the property converts to a rental. That draw still traces to the rental use from the moment the funds went there. The deduction analysis runs off use, not the occupancy status on the day the loan closed. And even where interest tracing clears a deduction as legitimate, Section 469’s passive activity loss rules can still cap how much of that deduction offsets other income in a given year. Tracing determines whether the interest is a rental expense. It doesn’t guarantee the resulting loss is fully usable right away.

Tax treatment isn’t the only place records matter. On the underwriting side, a lender reviewing a rental purchase or refinance will still want to see the property’s own rent history or a comparable-rent estimate, credit documentation, and reserves. DSCR lender review runs primarily on property-level rental income covering the payment, subject to lender guidelines. It’s never a substitute for full file review.

This is general information, not legal or tax advice. Interest tracing outcomes depend on the specific facts of how funds were used, documented, and reported. Investors should talk to a qualified CPA or attorney about their own situation before relying on any deduction.

About Lendmire

Lendmire (NMLS# 2371349) is a DSCR-focused mortgage broker that helps arrange investor financing across 41 markets, including Washington, D.C., through wholesale and investor-lending channels. DSCR eligibility is generally reviewed by the lender around the property’s rental income rather than personal income documentation, subject to lender guidelines — which works for self-employed investors, LLC operators, and portfolios above four financed properties. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. 26 CFR §1.163-8T, Cornell Legal Information Institute

2. IRS Publication 936

3. IRS News Release IR-2018-32

4. Cozen O’Connor — The Big Beautiful Bill: What Every High-Net-Worth Family Needs to Know