Cost Segregation for Short-Term Rentals in 2026: How Airbnb & VRBO Owners Cut Year-One Taxes
Updated July 2026
Quick answer: Short-term rentals like Airbnbs and VRBOs are depreciated over 39 years — not the 27.5 years most people assume — because the IRS treats any property with an average guest stay of 30 days or less as nonresidential. That slow schedule is exactly why cost segregation pays off so well for STR owners. A cost segregation study reclassifies the furniture, appliances, flooring, landscaping, and other short-life components into 5-, 7-, and 15-year property — often 25–35% of a furnished rental's value. Under the One Big Beautiful Bill Act (OBBBA), 100% bonus depreciation is now permanent for property placed in service after January 19, 2025, so that entire reclassified amount can be written off in year one. On a $750,000 Airbnb, that can mean roughly $189,000 in extra first-year deductions and about $70,000 off your tax bill — and if you materially participate in a rental with an average stay of seven days or less, that loss can offset your W-2 or business income, not just your rental income.
If you own a short-term rental, there's a good chance your accountant is depreciating it the slow way and leaving a large chunk of first-year deductions on the table. Not because they're doing anything wrong — but because the default depreciation schedule for a building is glacial, and unless someone runs a cost segregation study, that's the schedule your property is stuck on.
Here's the whole strategy in plain English, why 2026 is a genuinely good year to act, and a real example with actual dollar figures.
The thing almost everyone gets wrong about Airbnb depreciation
Most people assume a rental property is depreciated over 27.5 years, because that's the rule for residential rentals. But a short-term rental usually isn't "residential" in the eyes of the IRS.
When your average guest stay is 30 days or less, the tax code treats your property as nonresidential — the same category as a hotel — and stretches the building's depreciation over 39 years instead of 27.5. So your Airbnb actually depreciates slower than a normal long-term rental down the street.
That sounds like bad news, and on its own it is. But it's also the reason cost segregation is more valuable for STR owners than for just about anyone else. The slower your default schedule, the more you gain by pulling deductions forward. You're starting from a worse baseline, so the upside is bigger.
What a cost segregation study actually does
When you buy a building, the IRS lets you write off its cost a little at a time as it "wears out." Left alone, the whole thing gets lumped together and depreciated over that long 39-year life.
But you didn't just buy a building. You bought flooring, cabinetry, appliances, furniture, light fixtures, a patio, landscaping, a driveway, maybe a hot tub. Those things don't last 39 years, and the tax code knows it. A cost segregation study is an engineering-based analysis that goes through the property and reclassifies those shorter-lived pieces into their correct, faster depreciation buckets:
5-year property — appliances, furniture, carpeting, decor, electronics, window treatments
7-year property — certain fixtures and equipment
15-year property — land improvements like driveways, fencing, patios, and landscaping
Everything that gets reclassified comes out of the 39-year bucket and into a 5-, 7-, or 15-year bucket, where it can be written off far faster. For a furnished short-term rental, that's typically 25–35% of the property's value — a meaningfully higher share than an unfurnished rental, because all that furniture and equipment counts.
What OBBBA changed, and why 2026 matters
Here's where it gets good. Reclassifying assets into shorter buckets is only half the strategy. The other half is bonus depreciation — a rule that lets you write off the entire value of qualifying short-life property in the first year, instead of spreading it out.
Bonus depreciation was on its way out. Under the old law, it was phasing down — 40% in 2025, 20% in 2026, gone by 2027. The One Big Beautiful Bill Act reversed that completely. As of OBBBA, 100% bonus depreciation is permanent for property with a recovery period of 20 years or less — which covers everything a cost segregation study reclassifies.
The one gate to know: this applies to property you both acquired and placed in service after January 19, 2025. If you bought before that cutoff, you may fall under the older phase-down rates instead, so the timing of your purchase matters. (If you're not sure which side of the line you're on, that's exactly the kind of thing worth a quick conversation before you file.)
Put the two pieces together and the strategy is simple: a study moves 25–35% of your property's value into fast buckets, and bonus depreciation lets you deduct all of it in year one.
A real example: a $750,000 Airbnb
Let's run actual numbers. Say you buy a furnished short-term rental for $750,000. Strip out the land (which can't be depreciated) at 20%, and you're left with a $600,000 depreciable basis.
Without a cost segregation study, that entire $600,000 sits in the 39-year bucket. Your first-year depreciation is roughly $8,000. That's it.
With a cost segregation study, the analysis reclassifies about $192,000 — roughly 32% of the basis — into 5-, 7-, and 15-year property. Thanks to 100% bonus depreciation, all of it comes off in year one. Add the sliver of regular depreciation on the remaining building, and your first-year deduction jumps to nearly $198,000.
That's about $189,000 in additional first-year deductions. At a 37% marginal tax rate, that works out to roughly $70,000 knocked off your tax bill in the first year — from a study on a single property.
Without cost segWith cost segFirst-year depreciation~$8,000~$198,000Extra first-year deduction—~$189,000First-year tax savings (37%)—~$70,000
(These are preliminary estimates based on typical furnished-STR allocations. A full engineering study produces precise, IRS-defensible numbers for your specific property, and your actual result could land higher or lower.)
The part that gets high earners excited: offsetting W-2 income
For a lot of rental owners, a big paper loss isn't as useful as it sounds, because passive losses can generally only offset passive income. You can't use them against your salary.
Short-term rentals are the exception, and it's a big one. When your average guest stay is seven days or less and you materially participate in running the property, the IRS doesn't treat it as a passive rental activity at all — it's a business. And business losses aren't passive. They can offset your W-2 wages, your 1099 income, your business profit — active income.
Stack that on top of a cost segregation study and the picture is striking: the study creates a large first-year loss, the short-term-rental rules make that loss nonpassive, and material participation lets it flow against the income you actually pay the most tax on. That combination is why cost segregation has become such a favorite move for high-income professionals who own an Airbnb or two.
One honest caution on "material participation": it's about your hours relative to everyone else's. If your cleaner or property manager logs more hours on the property than you do, you can fail the test — even if you're genuinely involved. Keep a real, contemporaneous log of your time. In an audit, the burden is on you to show it.
The honest caveats
Cost segregation is a legitimate, IRS-endorsed strategy — but it's acceleration, not free money, and a good advisor will tell you where it doesn't fit.
You're pulling deductions forward, not creating extra ones out of thin air. Over the full life of the property, the total depreciation is the same either way; the value is in getting the cash now instead of over four decades, and in offsetting today's income while your rate is high. For most owners that time value is well worth it — but it means the math depends on your situation.
A few things that matter:
Hold period. If you sell quickly, some of those accelerated deductions get "recaptured" and taxed back. Generally, holding more than three years lets the benefit comfortably outweigh the recapture. Very short holds need a closer look.
Your state. Some states don't follow federal bonus depreciation. California, for one, decouples from it — you'll get the full 100% on your federal return, but the state makes you add it back and depreciate the normal way. New York, Hawaii, New Jersey, Oregon, and Pennsylvania have their own addback rules too. It doesn't kill the strategy, but it changes the numbers.
Do it right. The deductions only hold up if the study is engineering-based and properly documented. A cheap "estimate" that lumps everything together is the kind of thing that draws IRS questions instead of surviving them.
Already own the property? You're not too late
A common misconception is that cost segregation only works in the year you buy. It doesn't. If you've owned your short-term rental for a few years and never had a study done, you can do a look-back study and claim all the depreciation you should have been taking — caught up into a single current-year deduction, without amending old returns. Your CPA files a form (Form 3115) to make the change. For owners who've been sitting on a property for a while, this can unlock a large one-time write-off.
Is a study worth it for your property?
Cost segregation tends to make the most sense when your short-term rental is worth roughly $250,000 or more, you're in a meaningful tax bracket, and you plan to hold the property for at least a few years. Furnished STRs are close to the ideal candidate, because so much of the value sits in the short-life furniture and equipment that a study captures.
If that sounds like you, the fastest way to know is to run the numbers on your actual property.
Frequently asked questions
Is my Airbnb depreciated over 27.5 or 39 years? Usually 39 years. If the average guest stay at your property is 30 days or less, the IRS treats it as nonresidential — like a hotel — and depreciates the building over 39 years, not the 27.5 years that apply to long-term residential rentals. This slower schedule is a big part of why cost segregation is so valuable for short-term rental owners.
Does cost segregation make sense for a short-term rental? For most furnished STRs worth around $250,000 or more, yes. Furnished short-term rentals carry a lot of value in appliances, furniture, and equipment — the exact short-life assets a cost segregation study reclassifies into 5-, 7-, and 15-year property, which typically works out to 25–35% of the property's value that can be accelerated.
Can cost segregation losses offset my W-2 income? They can, if your short-term rental has an average guest stay of seven days or less and you materially participate in running it. In that case the IRS treats the rental as a nonpassive business rather than a passive rental, so the paper loss a cost segregation study creates can offset active income like your salary or business profit — not just rental income.
Do I qualify for 100% bonus depreciation in 2026? Most likely, if you both acquired and placed the property in service after January 19, 2025. Under the One Big Beautiful Bill Act, 100% bonus depreciation is now permanent for qualifying short-life property, so the assets a cost segregation study reclassifies can be fully deducted in year one. Properties bought before that cutoff may fall under the older phase-down rates instead.
How much can cost segregation save on a short-term rental? It depends on the property, but the first-year impact can be large. On a $750,000 furnished Airbnb, a study might reclassify roughly $192,000 into accelerated buckets, producing about $189,000 in additional first-year deductions and — at a 37% tax rate — roughly $70,000 in first-year tax savings. Your actual result depends on the property and your tax situation.
What if I already bought the property a few years ago? You can still do a cost segregation study through a look-back. Rather than amending old returns, your CPA files Form 3115 to claim all the depreciation you should have taken, caught up into a single current-year deduction. For owners who've held a property for a while without a study, this can produce a substantial one-time write-off.
About Apex Reserve Group. We do engineering-based cost segregation studies for short-term rentals and investment properties nationwide — fully remote, no site visit required. We handle the engineering study that identifies and defends your accelerated depreciation; your CPA handles the filing. If you want to know what your property could unlock, we offer a free 30-minute consultation and a preliminary estimate before you commit to anything. Get in touch at apexreservegroup.com.
This article is educational and isn't tax advice for your specific situation. Depreciation results depend on your property and your tax profile — loop in your CPA on filing decisions, and we're glad to handle the engineering side.