Mortgage Interest Deduction for Rental Property: What Owners Can Claim

Mortgage Interest Deduction for Rental Property

Rental property owners can generally deduct the mortgage interest they pay on loans secured by the property. The deduction applies to loans used to buy, build, or substantially improve the rental, and it flows through to Schedule E of Form 1040. The amount deductible depends on the property's use, the loan's purpose, and whether the owner itemizes deductions. Understanding these rules helps owners avoid errors that trigger audits or lost write-offs.

What Counts as Mortgage Interest

The term covers more than just the interest portion of a monthly payment. Points paid to obtain the loan, mortgage insurance premiums on older loans, and prepayment penalties may qualify. If the lender escrows interest, the owner can deduct the portion allocated to the rental period. Late-payment interest is generally not deductible. Owners should keep loan statements, settlement documents, and Form 1098 to substantiate the deduction.

Rental Use and the Personal-Use Rules

The deduction changes when the property is also used personally. If the owner rents the property for 15 or more days and uses it personally for fewer than 10 percent of the rental days or 14 days, whichever is greater, the property qualifies as a rental under IRS rules. Interest is deductible as a rental expense, subject to income limitations. If personal use exceeds those thresholds, the property is treated as a personal residence, and the interest deduction is limited to the qualified residence interest rules, with some expenses allocated to rental use.

How Refinancing Affects the Deduction

Refinancing does not reset the loan's character. The deductible interest is allocated based on what the original loan proceeds were used for. If the original loan purchased the rental and the refinance pays it off, the full interest remains deductible as a rental expense. If a cash-out refinance shifts proceeds to personal use, only the portion of interest related to the rental portion is deductible. The Tax Cuts and Jobs Act suspended miscellaneous itemized deductions, so rental interest remains deductible against rental income and is not subject to the old 2 percent floor.

Depreciation Recapture and the Interest Trade-Off

Rental owners cannot deduct both depreciation and the full mortgage interest without consequence on the back end. Depreciation reduces taxable income each year while the property is owned, but when the property is sold, the accumulated depreciation is recaptured as ordinary income. Because mortgage interest is typically deductible in full against rental income during ownership, owners often prefer the interest deduction while the property is held, but they should plan for the eventual recapture.

Handling Multiple Loans and HELOCs

Rental owners often carry a first mortgage and a home equity line of credit or second mortgage. The deduction for home equity debt is limited to interest on up to $750,000 of qualified acquisition debt combined ($375,000 for married filing separately), with the loan secured by the rental or the owner's qualified residence. Interest on equity debt used for personal expenses is not deductible. If the HELOC funds rental improvements, the interest becomes a deductible rental expense.

Record-Keeping That Supports the Deduction

The IRS requires clear records linking interest payments to the rental. Owners should track the loan purpose at origination, allocate interest between rental and personal periods when the property has mixed use, and keep copies of Form 1098, bank statements, and settlement statements. A simple spreadsheet matching each payment to the rental period and loan purpose reduces the risk of disallowance at audit.

Working With a Professional

The interaction between rental use, refinancing, and depreciation makes this area prone to error. Owners who have complex loan structures, mixed-use properties, or cash-out refinances should consult a tax professional. A qualified preparer can model the deduction, allocate interest correctly, and advise on whether the mortgage interest deduction or the depreciation approach better fits the owner's overall tax plan.