You can write off a travel trailer on your taxes through one of two routes: treat it as a qualified second home and deduct the loan interest, or use it more than half the time for business and depreciate the purchase price. A trailer can also generate smaller deductions for sales tax, personal property tax, and rental expenses. None of this is automatic, and the paperwork rules are strict enough that a sloppy claim can wipe out the deduction.
When a Travel Trailer Counts as a Second Home
The IRS treats a travel trailer like a house, condo, or boat for the mortgage interest deduction, but only if two conditions are both met. The trailer must have sleeping space, cooking facilities, and a toilet, all permanently installed. A utility trailer or a bare cargo conversion does not qualify. And the loan has to be secured by the trailer itself, meaning the lender can repossess it if you default.1Internal Revenue Service. Publication 936 (2025), Home Mortgage Interest Deduction
Fail either test and the interest is personal interest, which is not deductible.2Office of the Law Revision Counsel. 26 USC 163 – Interest
One trap worth flagging: a home equity line of credit against your main house, used to buy the trailer, does not give you deductible mortgage interest. HELOC interest is deductible only when the borrowed funds buy, build, or substantially improve the home securing the loan.1Internal Revenue Service. Publication 936 (2025), Home Mortgage Interest Deduction
If You Also Rent It Out
Renting the trailer complicates second-home status. You have to use it personally for the greater of 14 days or 10 percent of the days it was rented at a fair market rate during the year. Miss that threshold and the IRS stops treating it as your second home for the year.3Internal Revenue Service. Publication 527 (2025), Residential Rental Property – Section: Dwelling Unit Used as a Home
Claiming the Mortgage Interest Deduction
Once the trailer qualifies, the interest deduction goes on Schedule A of Form 1040, which means itemizing rather than taking the standard deduction. For 2026, the standard deduction is $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for heads of household.4Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Your itemized total, trailer interest included, has to exceed that number before itemizing saves you anything.
If you paid $600 or more in interest during the year, the lender should send you Form 1098 reporting it.5Internal Revenue Service. About Form 1098, Mortgage Interest Statement The deductible amount goes on line 8a of Schedule A.6Internal Revenue Service. Instructions for Schedule A (Form 1040) (2025)
There is a ceiling on how much acquisition debt qualifies. For loans taken out after December 15, 2017, your combined balances on primary and second home cannot exceed $750,000 ($375,000 if married filing separately). Older loans have a $1 million cap ($500,000 if married filing separately). Balances above the applicable cap mean only a proportional share of the interest is deductible.1Internal Revenue Service. Publication 936 (2025), Home Mortgage Interest Deduction
Sales Tax and Personal Property Tax
Sales tax on a trailer purchase can run into the thousands, and you can deduct it on Schedule A if you elect to deduct state and local sales taxes instead of state and local income taxes. You cannot claim both. Recreational vehicles are specifically included in the IRS definition of motor vehicles eligible for this deduction, and it applies even if the trailer’s sales tax rate differed from your state’s general rate.7Internal Revenue Service. 2025 Instructions for Schedule A (Form 1040) The election lives on line 5a of Schedule A, and it tends to pay off if you live in a state without an income tax or if the trailer sales tax alone exceeds your state income tax for the year.
Many states or counties also charge an annual ad valorem tax on travel trailers. If the tax is based solely on the trailer’s value and assessed annually, it is deductible as a state and local personal property tax. Flat registration fees or weight-based fees do not count.
All of these state and local taxes share one bucket under the SALT cap. The One, Big, Beautiful Bill raised that cap from $10,000 to $40,000 starting in 2025 ($20,000 for married filing separately), with small inflation adjustments beginning in 2026.4Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Most trailer owners will not hit the $40,000 ceiling from the trailer alone, but combined with a high property tax bill or high state income taxes, the cap can bite.
Writing Off a Trailer Used for Business
If the trailer is used primarily for business, the tax treatment shifts away from interest deductions and toward depreciation of the purchase price. This path applies when the trailer serves as a mobile office, lodging at remote job sites, or part of a rental fleet, and when business use exceeds 50 percent of total use for the year.8Internal Revenue Service. Publication 946 (2025), How To Depreciate Property – Section: What Is the Business-Use Requirement
Travel trailers are classified as listed property under the tax code because they fall into categories tied to transportation or recreation.9Office of the Law Revision Counsel. 26 USC 280F – Limitation on Depreciation for Luxury Automobiles and Certain Other Property That label means heightened recordkeeping. You need contemporaneous logs showing the date, duration, and purpose of each business trip and each personal use. The IRS scrutinizes listed property claims more aggressively because the personal appeal of a trailer is obvious.
Mixed-use trailers require splitting every deductible expense, including depreciation, insurance, maintenance, and storage, by the business-use percentage. Seventy percent business use means 70 percent of each qualifying cost is deductible. Sole proprietors report these on Schedule C.10Internal Revenue Service. Instructions for Schedule C (Form 1040)
Drop below 50 percent business use in any year and you lose accelerated depreciation. The IRS forces you onto the Alternative Depreciation System, which stretches the write-off over a longer period using straight-line.11Internal Revenue Service. Publication 587 (2025), Business Use of Your Home – Section: Listed Property If you previously claimed Section 179 or bonus depreciation and business use falls to 50 percent or less before the recovery period ends, you have to recapture the excess depreciation as ordinary income that year.12Internal Revenue Service. Instructions for Form 4562 (2025)
If the trailer is your primary workspace and you live in it while running a business, you may also qualify for the home office deduction. The IRS definition of “home” includes mobile homes, which covers travel trailers. You must set aside a specific area used exclusively and regularly for business, and you cannot have another fixed location where you handle substantial management or administrative work.13Internal Revenue Service. Publication 587 (2025), Business Use of Your Home A dinette that doubles as a dinner table fails the exclusive-use test.
Section 179 and Bonus Depreciation for 2026
Clear the 50 percent business-use bar and two accelerators become available, both claimed on Form 4562.14Internal Revenue Service. About Form 4562, Depreciation and Amortization
Section 179 lets you deduct the entire cost of the trailer the year it is placed in service, up to $2,560,000 for 2026. The ceiling phases out dollar-for-dollar once you place more than $4,090,000 of qualifying property in service during the year.15Internal Revenue Service. Rev. Proc. 2025-32 For most trailer buyers those caps are irrelevant. The real constraint is that Section 179 cannot create or increase a net business loss. If the trailer costs $80,000 but your net business income before the deduction is $50,000, you can expense $50,000 this year and carry the remaining $30,000 forward.
Bonus depreciation is the other accelerator. The One, Big, Beautiful Bill permanently restored 100 percent bonus depreciation for qualifying property acquired after January 19, 2025, replacing the phase-down that had dropped the rate to 40 percent earlier in the year.16Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One, Big, Beautiful Bill Unlike Section 179, bonus depreciation has no business income limit, so it can generate a net operating loss that carries to other years. Between the two, most trailer purchases in 2026 can be fully written off in year one.
Any remaining basis after Section 179 and bonus depreciation is recovered through MACRS. Business travel trailers generally follow a five-year recovery period, though the exact classification depends on how the trailer is used.
What Happens When You Sell
Depreciation gives you a big upfront break, but the IRS collects some of it back at sale. A travel trailer is personal property, not real estate, so it falls under Section 1245 recapture. The recaptured amount is the lesser of total accumulated depreciation or the gain on the sale, and it is taxed as ordinary income rather than at capital gains rates.
Say you buy the trailer for $80,000, expense the full amount through Section 179, and sell it later for $35,000. Adjusted basis is zero because the entire cost was deducted. Gain is $35,000, all of it Section 1245 recapture at ordinary rates. Sell the same trailer for $5,000 after five years of use and recapture is just $5,000. You only owe recapture tax on the actual gain, not on the full depreciation claimed.17Internal Revenue Service. Depreciation Recapture
A trailer that holds its value will trigger a larger tax bill at sale. One that depreciates sharply will produce little recapture because the sale price is low. Either way, you benefited from deducting the cost upfront.
If You Rent the Trailer Out
Rental income from peer-to-peer platforms or campground arrangements is reportable, and the rental activity opens up its own deductions. Rental income and expenses go on Schedule E, where you can deduct insurance, repairs, management fees, cleaning, depreciation, and advertising.18Internal Revenue Service. 2025 Instructions for Schedule E (Form 1040)
Using the trailer yourself part of the year means splitting expenses between rental and personal use. Divide the days rented at a fair price by the combined total of rental and personal-use days, then multiply each expense by that fraction. Only the rental portion is deductible.19Internal Revenue Service. Publication 527 (2025), Residential Rental Property
There is a useful exception for light rental activity. Rent the trailer for fewer than 15 days during the year and you do not have to report the rental income at all. The trade-off is that no rental expenses are deductible for those days either. This works well for owners who rent out a weekend or two but keep the trailer mostly for personal use.
Rental activity also interacts with second-home status. Rent extensively and fail the personal-use test described earlier, and the trailer loses its second-home classification. The mortgage interest moves from Schedule A to Schedule E as a rental expense. That is not necessarily worse, but the rules shift, and the passive activity loss limits under Section 469 may cap how much you can deduct against other income.