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A short-term rental is a house plus a furniture showroom, a hot tub, a fire pit, a deck, a driveway, a landscaped yard and a stack of linens, and the tax code treats many of those pieces very differently from the building. The structure sits on 27.5 or 39 years, but furniture and appliances are examined as 5-year property, and many outdoor features as 15-year land improvements. A cost segregation study identifies and documents those pieces so they can be depreciated over their shorter lives and, under current law, deducted in the first year using 100 percent bonus depreciation. The catch is that the deduction only offsets a paycheck if you materially participate, and a hot tub on a 5-year schedule needs documentation behind it before it earns that treatment.
Consider a hypothetical couple, Pete and Dana. Pete is a software engineer, Dana is a physician assistant, and together they earn a solid W-2 income. In March 2025 they bought a four-bedroom cabin outside Reno, Nevada, on the road up toward Mount Rose, for $780,000, and had it listed and ready for guests in April. They spent another $62,000 furnishing it, adding a hot tub, building a fire pit patio, and installing a gravel driveway extension for guest parking.
At tax time the following spring their CPA asked a question that surprised them: "How did you record the furniture and the outdoor work?"
"It's all part of the cabin," Pete said. "We just put it all in the building."
That was a costly assumption. The furniture belonged in the 5-year class. The fire pit patio, driveway and landscaping belonged with the 15-year land improvements. Both classes are eligible for bonus depreciation, so a large part of the $62,000 plus a share of the purchase price could have been deducted in the first year. Moving even the $38,000 of furnishings into the correct class and deducting it in full would have been worth roughly $14,000 in federal tax at a 37 percent rate in year one alone. They had been taking pennies a year instead.
Land is never depreciable. The building and the things that go with it are depreciable, but over different periods depending on what they are.
A fully engineered and accounted cost segregation study costs each component and classifies it with documentation.
Residential rental property gets the 27.5-year life, but the statute excludes units in a hotel, motel or similar establishment where more than half the units are used on a transient basis, and a transient basis generally means an average stay under 30 days. Many advisors still put a platform-rented vacation home on 27.5 years. The transient test points the other way: a short-term rental with an average stay under 30 days is nonresidential real property on a 39-year schedule. Settle that with your CPA before the study. It changes the building's recovery period and nothing about the 5-year and 15-year classifications that follow.
This is the simplest category and the one most owners underestimate. Furnishings are tangible personal property, separate from the building:
Two tools apply. The de minimis safe harbor election lets you expense items costing $2,500 or less per invoice or item, rather than depreciating them, if the election is made on a timely filed return. For larger items, 100 percent bonus deducts the full cost in the year placed in service. Furniture bought separately is easy to document from receipts. Furniture that came with the property needs a reasonable, supported allocation out of the purchase price, which is one more thing the study does.
Hot tubs are the favorite example in short-term rental tax conversations, and the one most often oversimplified. The classification depends on what the item is and how it is installed. A permanently installed pool is generally analyzed as a land improvement with a 15-year recovery period. A built-in spa that is integrated with a deck or a pool structure is often analyzed along the same lines. A self-contained, portable hot tub that sits on a pad and plugs in may be analyzed as personal property with a shorter life. Which treatment applies depends on the Whiteco factors, which look at whether the asset is movable, whether it is designed to be moved, whether removing it would cause damage, and how permanently it is affixed. We explain those factors in The Whiteco 6-Factor Test.
The related electrical work, plumbing, decking and enclosure are evaluated the same way. Documenting the facts is what keeps owners and preparers out of trouble.
Outdoor spaces drive bookings, and the tax treatment depends on whether a feature is part of the building or a separate site improvement.
Plantings tied to the building are land improvements, but the portion that is simply preparing the land is part of the land and never depreciable. That line is easy to get wrong without an engineer.
Inside the building, specialty lighting and decorative fixtures, removable flooring such as carpet, window coverings, dedicated electrical for appliances and hot tubs, security systems, smart locks and removable specialty finishes are examined for shorter-life treatment, with the reasoning documented item by item so your CPA and an examiner can follow it.
Reclassification gets the pieces into shorter lives. Bonus depreciation is what accelerates the deduction. Under the One Big Beautiful Bill Act, 100 percent bonus depreciation was permanently restored for qualifying property acquired and placed in service after January 19, 2025. That generally includes the 5-year, 7-year, and 15-year components identified in a study.
Used property qualifies if you bought it from an unrelated party and had not used it before, so an existing furnished rental is fine. The acquisition date, which is the written binding contract date, controls the rate, and IRS Notice 2026-11 addresses how that works; we explain it in What IRS Notice 2026-11 Means for Your Acquisition Date. A related point: "placed in service" means the date the property is ready and available to rent, which can be weeks after closing.
A rental activity is passive, and passive losses offset only passive income, which is why many W-2 owners hear that depreciation will not help them. The short-term rental rules offer a path. An activity is not a rental activity if the average period of customer use is seven days or less, or 30 days or less with significant personal services. Then the question is whether you materially participate. If you do, the loss is nonpassive and can offset other income, subject to basis, at-risk and the excess business loss limitation. The tests short-term rental owners use:
The second test is where owners get tripped up: a cleaner or property manager who spends more hours than you do defeats it. A spouse's hours count toward yours. Keep contemporaneous records, a calendar, a task log, messages and receipts, rather than a reconstructed estimate at tax time. We cover the tests in Material Participation Rules.
The deduction may also be subject to the 2026 excess business loss limit, which caps how much net business loss an individual can use against non-business income in a single year, with the excess carried forward. For tax years beginning in 2026 the cap is $256,000 for single filers and $512,000 on a joint return, adjusted annually.
Under Section 280A, a dwelling unit is a residence if your personal use exceeds the greater of 14 days or 10 percent of the days rented at a fair price, and then deductions are limited to the rental income. Owners who split time between personal use and rental should talk to their CPA before commissioning a study. If you converted a home to a rental, read Converted Your Home to a Short-Term Rental? What Cost Segregation Can (and Cannot) Do.
These figures are illustrative.
Suppose a cost segregation study of the building identifies 22 percent of the purchase-price basis, about $137,000, as 5-year and 15-year property such as specialty electrical, certain fixtures, and existing site improvements. Add the $38,000 of furnishings and $24,000 of new outdoor work, and the total eligible for shorter lives is roughly $199,000.
Without a study, Pete's version puts all $686,000 on the 39-year schedule. The IRS mid-month table gives April a first-year rate of 1.819 percent, so the 2025 deduction is $12,478.
With the study, the $199,000 of 5-year and 15-year property is deducted in full in 2025 under 100 percent bonus depreciation, with no proration, because the cabin was acquired and placed in service after January 19, 2025. The remaining $487,000 of building stays on 39 years at the April rate: $8,859. Total 2025 depreciation: $207,859, against $12,478 without the study. The extra $195,381 is worth $72,291 of federal tax at 37 percent, provided Pete and Dana can use the loss. They file jointly, and a loss this size sits well under the Section 461(l) cap of $626,000 for 2025 on a joint return, adjusted annually. If Pete and Dana materially participate in the short-term rental activity and meet the other requirements, the loss can offset their W-2 income. If they do not, it suspends and carries forward against future passive income.
Cost segregation does not create extra depreciation; total deductions equal depreciable basis either way. It changes the timing, and tax saved today can be reinvested, used to pay down debt or put toward the next property.
When you sell, depreciation on personal property such as furniture is recaptured as ordinary income up to the depreciation taken, and depreciation on the real property portion is taxed at up to 25 percent as unrecaptured Section 1250 gain, with remaining gain at capital gain rates. Long holds, a like-kind exchange and a stepped-up basis for heirs soften this, and suspended passive losses release on a fully taxable disposition. We lay out the math in Depreciation Recapture After a Cost Segregation Study. If you expect to sell in a year or two, the study may not make sense, and we would tell you so.
If you have owned the rental for a few years without a study, a look-back study with Form 3115 captures the missed depreciation as a Section 481(a) adjustment in the year of change, without amending prior returns, and furnishings that were wrongly placed in the building category are caught up the same way. Cost Seg America prepares the Section 481(a) computation and, for a separate fee, the Form 3115 itself; your CPA files it. We explain the process in our guide to look-back studies and Form 3115.
The IRS Audit Techniques Guide describes six common approaches to cost segregation and prescribes none. A fully engineered and accounted study works under the first two: detailed engineering from actual cost records where they exist, which for a cabin means the closing statement and the furniture and contractor invoices, and engineering with documented estimates reconciled to the purchase price where they do not. Every item is examined on its own: the hot tub and its pad, the dedicated circuit that feeds it, the fire pit, the gravel extension, the beds and the washer and dryer, with a written reason for each class under the Whiteco factors. The result is a component schedule your CPA imports and an examiner can trace line by line, signed by credentialed professionals, and defended for as long as you own the property, with no time limit, hour cap or additional fee. An estimated study applies a percentage to the purchase price and has nothing behind it when someone asks how the hot tub ended up on a 5-year schedule.
If the depreciable basis after land is under $180,000, Cost Seg America's minimum, the fee eats the benefit. If you plan to sell within a couple of years in a fully taxable sale, Section 1245 recapture on the furniture and components can take back more than the time value gave you. If you cannot materially participate and have no passive income, the loss sits suspended and the cash benefit arrives late. And if personal use will push the cabin over the Section 280A line every year, the deduction is capped at rental income before the passive rules ever apply. We discuss these cases in When NOT to Do a Cost Segregation Study.
The practical deadline for the current year is your filing date, including extensions, so a study ordered in the fall can still land on the return you file next spring.
The closing statement, the contract and closing dates and the date the property was ready to rent, invoices for the furniture, hot tub and outdoor work, anything that supports the land allocation, booking records showing average stay and personal use days, your hours log, and prior depreciation schedules if you have owned it a while.
Yes. Furniture, appliances, and similar furnishings used in a residential rental activity are generally examined as 5-year property, separate from the building. They may qualify for 100 percent bonus depreciation, and items at or below the de minimis safe harbor threshold may be expensed if the election is made.
Often, yes, but the classification depends on the facts. A permanently installed pool or built-in spa is generally treated as a 15-year land improvement, while a portable hot tub may be analyzed as personal property. A study documents which treatment applies.
Freestanding site improvements such as patios, walkways, driveways, fencing, and outdoor lighting are generally 15-year land improvements. A deck that is structurally part of the building is generally part of the building.
Only if the average stay is seven days or less, which takes the activity outside the rental definition, and you materially participate, or if you qualify another way such as real estate professional status. The excess business loss limit still applies.
It can. If personal use exceeds the greater of 14 days or 10 percent of the days rented, the property is treated as a residence for purposes of the vacation home rules, and deductions are generally limited. Talk to your CPA before commissioning a study.
Usually not. A look-back study with a Form 3115 accounting method change can generally claim previously missed depreciation as a Section 481(a) adjustment in the year of change, without amending earlier returns.
Depreciation on personal property is generally recaptured as ordinary income up to the amount taken, and depreciation on the real property portion is generally taxed at up to 25 percent as unrecaptured Section 1250 gain. A like-kind exchange or a stepped-up basis at death can change the outcome.
Send Jim Dougherty and his team the closing statement, the furniture and contractor invoices, and the date the property was ready for guests. You will have a free proposal within 24 hours showing what a fully engineered and accounted study would likely move into the 5-year and 15-year classes, and the fee. If the numbers do not support a study, the proposal will say so. Call 1-888-365-5023 or email info@costsegamerica.com.
This article is for general educational purposes only; the examples are hypothetical and simplified, and you should confirm the treatment with your own CPA before acting.
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