A furnished rental cabin in Gatlinburg, Pigeon Forge or Sevierville is one of the best candidates for cost segregation. The study moves part of the purchase price out of the building, which is written off over decades, and into furniture, equipment and site work that can be written off much faster. With 100% bonus depreciation back for property acquired after January 19, 2025, most of that faster write-off can land in the first year.
This article explains how it works for cabin investors. It is general information, not tax advice. The rules have conditions, and your CPA should confirm how they apply to you before you act.
What cost segregation is
When you buy a rental, the land is not depreciable, and the building is normally written off in equal amounts over 27.5 years for residential rental property or 39 years for nonresidential property. Many short-term rentals fall into the 39-year group, because a home rented mostly to transient guests does not meet the tax definition of residential rental property.
A cost segregation study, prepared by an engineer or a specialist firm, breaks the purchase price into its parts and assigns each part its proper recovery period. The parts that are not structural can be depreciated far faster than the building.
| Class | Typical items in a rental cabin | Recovery period |
|---|---|---|
| Personal property | Furniture, appliances, carpet, televisions, game room and theater equipment, decor | 5 years |
| Land improvements | Driveways, retaining walls, walkways, landscaping, outdoor lighting, fire pits, site utilities | 15 years |
| Building | Foundation, framing, roof, walls, windows, plumbing, electrical, HVAC | 27.5 or 39 years |
Why Smoky Mountain cabins are strong candidates
- They sell furnished. Beds, sofas, appliances, hot tubs and game room equipment are often a large share of what you pay for.
- Mountain lots need site work. Long driveways, retaining walls and stone walkways on steep lots are land improvements, not building.
- Amenities drive the rate. Theater rooms, arcades and outdoor living areas add short-life components that a plain rental house does not have.
- The land is often a modest share of the price. Less of what you pay is locked in non-depreciable land.
100% bonus depreciation is back, and permanent
The 2025 federal tax law, known as the One Big Beautiful Bill Act, made 100% bonus depreciation permanent for qualified property acquired after January 19, 2025. Qualified property generally means assets with a recovery period of 20 years or less, which includes the 5-year and 15-year parts a study identifies. Those parts can be deducted in full in the year the cabin is placed in service.
Property acquired before January 20, 2025 and placed in service in 2025 qualifies for 40% bonus depreciation instead. If you signed a binding contract before January 20, 2025, the cabin may not qualify for 100% even if it closed later. The IRS issued interim guidance on these rules in Notice 2026-11.
An illustration
| Purchase price of a furnished cabin | $850,000 |
| Allocated to land | $100,000 |
| Building, contents and site work | $750,000 |
| Reclassified to 5- and 15-year property (25%, assumed) | $187,500 |
| Deducted in year one with 100% bonus depreciation | $187,500, plus regular depreciation on the remaining $562,500 |
| Federal tax value of the bonus deduction at a 35% bracket | About $65,600 |
Without a study, the same cabin might produce under $20,000 of depreciation in its first year.
Who can use the deduction: the short-term rental rules
Depreciation this large usually creates a loss on paper. Rental losses are normally passive, which means they can offset only passive income, and the unused loss carries forward. That is where the short-term rental rules matter.
- Average stay of seven days or less. When the average guest stay for the year is seven days or less, the cabin is not treated as a rental activity under the passive loss rules. Many Smoky Mountain cabins average two to four nights.
- Material participation. You still have to materially participate. The common tests are more than 500 hours a year, or more than 100 hours and at least as much as anyone else, including cleaners and managers.
- The result. If both are met, the loss can be nonpassive and can offset wages or business income on your federal return.
A full-service property manager often works more hours on the cabin than the owner does, which can fail the 100-hour test. Keep a dated log of your hours as you go: guest messaging, pricing, hiring and supervising cleaners, maintenance and bookkeeping. Heavy personal use of the cabin can also limit the deduction.
The Tennessee angle
Tennessee does not tax individuals on wages or rental income, since the Hall income tax was fully repealed in 2021. The benefit of a cost segregation study on a Tennessee cabin is therefore on your federal return. If you live in another state, ask your CPA how your home state treats bonus depreciation, because some states do not follow the federal rules.
If you own the cabin through an LLC
Tennessee’s franchise and excise taxes can apply to an LLC or other entity that owns a cabin, even though individuals pay no state income tax. For the excise tax, Tennessee generally follows federal bonus depreciation on assets bought on or after January 1, 2023, under the Tennessee Works Act. The franchise tax is figured differently, and some entities qualify for exemptions, so ask your CPA how your ownership structure is treated before you file.
Timing, cost and the catch on resale
- Order the study for the year the cabin is placed in service, so the deduction is on that year’s return.
- Bought a cabin in an earlier year? A look-back study can still capture missed depreciation through a change in accounting method on Form 3115, generally without amending old returns.
- Weigh the fee against the benefit. Your CPA can tell you whether the deduction justifies the cost of the study for a cabin of your size.
- Depreciation is recaptured when you sell. The depreciation you claim reduces your basis, and much of it is taxed when the cabin is sold, part of it at ordinary income rates. A 1031 exchange into another property can defer it.
How this fits your financing
A DSCR loan qualifies the cabin on its rental income, not on your tax return. A large depreciation loss can make a personal return look weak to a conventional lender, but it does not affect the debt service coverage ratio we use. The tax you save can go toward reserves or the down payment on the next cabin.
The same treatment applies to a cabin you build once it is placed in service and available to rent, so the study can be planned alongside the construction budget. See DSCR rental loans, construction loans and cash-out refinancing a cabin.
Common questions
It is a study that splits a cabin’s cost into building, land improvements and personal property such as furniture and appliances. The non-building parts are depreciated over 5 or 15 years instead of 27.5 or 39, which moves deductions into the early years of ownership.
Generally yes. Under the 2025 tax law, 100% bonus depreciation is permanent for qualified property acquired after January 19, 2025, which covers the 5- and 15-year parts identified by a study. The building itself is not eligible.
They can if the average guest stay is seven days or less and you materially participate, for example by working more than 100 hours on the cabin and more than anyone else. Otherwise the loss is usually passive.
No. A DSCR loan is sized on the cabin’s rental income against its monthly payment. We do not use your tax returns to qualify you.
Yes. A look-back study can claim the depreciation you missed in the current year through Form 3115, generally without amending prior returns. The 100% bonus rate applies only to property acquired after January 19, 2025.
This article is general information and not tax or legal advice. Talk to a CPA who works with short-term rental owners before you order a study. When you are ready to finance a cabin, get pre-qualified or call (954) 598-4564.