Is Bridge Loan Interest Tax Deductible: Cap, Uses, and Records

Bridge loan interest is tax deductible when the loan is secured by a qualified home and the borrowed money is used to buy, build, or substantially improve that home. In that situation the IRS treats it like any other mortgage interest, subject to the $750,000 total mortgage debt cap and the requirement that you itemize. When a bridge loan funds an investment property, rental, or flip, the interest can still be written off, but it moves onto a different schedule and follows different timing rules.

When Bridge Loan Interest Counts as Mortgage Interest

Two things have to be true. The loan must be secured by a qualified home, meaning the lender has a recorded lien against the property. And the proceeds must go toward acquiring or improving a qualified home.¹ A bridge loan that covers your down payment on a new house while the old one is still listed fits cleanly, as long as one of the properties secures the debt.

The use-of-proceeds rule is where people slip up. If you borrow against your current home through a bridge loan and spend part of the money on credit card balances, a car, or living expenses, the interest on that portion is not deductible. The IRS no longer allows any deduction for home-secured debt when the proceeds go toward something other than acquiring or improving a home.¹

The loan paperwork matters too. The agreement must identify real property as collateral, and the lien must be recorded or otherwise perfected under state law.² Some bridge products from private or hard-money lenders are structured as unsecured personal loans. Without a lien on the property, the interest is personal interest, which is not deductible at all.

Owning Two Homes During the Bridge

A bridge loan usually creates a stretch of time when you own two houses at once, and the tax code accommodates that. You can deduct mortgage interest on your main home plus one designated second home simultaneously.¹ Once you move into the new house it becomes your main residence, and the old house still sitting on the market can carry the second-home label.

You are also allowed to switch which property counts as the second home during the year. If the old house sells in June, another property can hold the designation from that point on. Only one property can carry the second-home label at any given moment.¹

The $750,000 Cap and the Itemizing Test

Two ceilings can shrink the benefit even when the loan otherwise qualifies. The first is the debt limit. For loans taken out after December 15, 2017, interest is deductible on up to $750,000 of total mortgage debt, or $375,000 if you file married filing separately.¹ That cap covers everything at once: the mortgage on your old house, the mortgage on the new house, and the bridge loan itself all count together.

This is where bridge loans create a real squeeze. During the overlap your combined balance is temporarily inflated because all three loans are outstanding. If the total pushes past $750,000, only a proportional share of the interest is deductible for the period you were over the limit. Once the old house closes and you pay off the bridge, you drop back under the ceiling, but the interest paid while over it is only partially deductible.

The second ceiling is the itemizing threshold. Mortgage interest only helps if your itemized deductions on Schedule A beat the standard deduction. For 2026, the standard deduction is $32,200 for married couples filing jointly, $16,100 for single filers and married filing separately, and $24,150 for heads of household.³ Mortgage interest, state and local taxes, charitable gifts, and the rest of your itemized items have to beat that number for itemizing to pay off. A large bridge loan can push you over on its own, but run the math both ways.

Bridge Loans for Rentals, Investments, and Flips

Bridge financing for real estate you don’t live in follows a different path. The interest doesn’t go on Schedule A. Where it lands depends on what you’re doing with the property.

Rental and Investment Property

For a property held as a long-term rental, bridge loan interest is generally deductible against the rental income the property produces, reported on Schedule E as a rental expense. If the property is a pure investment, such as vacant land held for appreciation, the interest falls under the investment interest rules of Section 163(d).²

The investment interest limitation catches many buyers off guard. You can only deduct investment interest expense up to your net investment income for the year. Anything over that amount carries forward to future years but does nothing for the current return.²

Fix-and-Flip Projects

Flippers face a wrinkle of their own. When you buy with the intent to renovate and resell, the IRS often treats you as producing real property for sale rather than holding an investment. Under Section 263A, taxpayers producing real property generally must capitalize interest into the property’s basis instead of deducting it currently.⁴ Capitalizing means the interest is added to the cost of the property, reducing taxable profit at sale, but no deduction is available while you’re carrying the loan.

There is an exception for small business taxpayers with average annual gross receipts of $25 million or less over the prior three years. They are not subject to Section 263A’s capitalization requirements.⁴ Most individual flippers sit well under that ceiling.

How You Spend the Money Decides the Category

The collateral behind a loan doesn’t determine whether the interest is business, investment, or personal. What decides is where the borrowed dollars actually went. This is called interest tracing, and it lives in Treasury Regulation 1.163-8T.⁵

The rule traces each dollar to what it funded and categorizes the interest accordingly. Take out a $200,000 bridge loan, spend $150,000 on a rental property down payment and $50,000 on personal expenses, and 75% of the interest is potentially deductible as a rental expense while 25% is nondeductible personal interest.

Commingling proceeds makes tracing harder. When bridge loan funds land in an account that already holds other money, the regulation applies an ordering rule: borrowed funds are treated as spent first, before any unborrowed amounts already in the account.⁵ A 15-day safe harbor also lets you treat an expenditure made within 15 days of receiving the funds as coming from the loan proceeds. The cleanest approach is a dedicated account with the bridge funds spent directly on the target property.

Points and Origination Fees

Bridge loans often carry origination fees or points, and these can also be deductible, though the timing differs from a typical purchase mortgage. The general rule is that points are spread across the life of the loan rather than deducted all at once.⁶ For a six-month bridge, that amortization plays out quickly. On longer bridges the difference is more noticeable.

An exception lets you deduct points fully in the year paid, but only if the loan is for buying or building your principal residence, the home secures the loan, points are standard in your area, the charge isn’t inflated beyond local norms, and you provided funds at closing at least equal to the points.⁶ A bridge loan secured by the departing home rather than the new one flunks the test because the collateral isn’t the property being acquired. In that case the points are amortized over the loan term.

What to Keep for Tax Time

The starting document is IRS Form 1098, the Mortgage Interest Statement. Any lender in the business of making loans who receives $600 or more in interest from you during the year must send you one.⁷ It shows the interest and any points paid at closing.

Bridge loans have a common gap here. Many bridge lenders are private or hard-money outfits that don’t issue a Form 1098. Without one, you can still claim the deduction by reporting the interest on Line 13 of Schedule A. You’ll need to include the lender’s name, address, and tax identification number, and keep your own records: loan statements, payment confirmations, and bank records showing what you paid. Hold them for at least three years.

Beyond Form 1098, keep the closing disclosure from the property purchase. It shows how proceeds were distributed, confirms the collateral, and lists points and fees. For interest tracing, also keep bank statements showing where the bridge funds landed and how they were spent. Clean records connecting borrowed dollars to a specific property are what separate a deduction that holds up from one that gets denied.

AMT for High Earners

If your income triggers the alternative minimum tax, bridge loan interest may not deliver everything you expect. Under the AMT, the only deductible mortgage interest is interest on debt used to buy, build, or substantially improve a qualified home. Any portion of bridge proceeds spent on something else has to be added back when calculating AMT liability.

For 2026, the AMT exemption is $140,200 for married couples filing jointly, $90,100 for single filers, and $70,100 for married filing separately. The exemption phases out once income passes $1,000,000 for joint filers or $500,000 for single and separate filers. Near those thresholds, work through the AMT interaction with a tax professional before assuming the full deduction will hold.

1
Internal Revenue Service. Publication 936 – Home Mortgage Interest Deduction
2
Office of the Law Revision Counsel. 26 USC 163 – Interest
3
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
4
Internal Revenue Service. Interest Capitalization for Self-Constructed Assets
5
eCFR. 26 CFR 1.163-8T – Allocation of Interest Expense Among Expenditures
6
Internal Revenue Service. Home Mortgage Points
7
Internal Revenue Service. Instructions for Form 1098 – Mortgage Interest Statement