Qualifying your short-term rental was step one. Most owners stop there, take the deduction the default way, and leave the biggest part of it sitting on a schedule that runs for decades.
A short-term rental cost segregation study is the second decision, and it controls how big the deduction gets. The study breaks the property into its parts (furniture, appliances, flooring, certain electrical and plumbing work, land improvements) and assigns each one the class life it actually qualifies for: some at 5 years, some at 7, some at 15. Under current law, anything with a class life of 20 years or less can be deducted in full in the year you place it in service. If the rental already qualifies as a short-term rental, that deduction lands against your business or W-2 income this year, not over the next few decades.
None of this works unless the rental clears the qualifying tests first. In the short-term rental loophole Q&A, I walked through what decides whether a short-term rental cuts your taxes or just sits there doing nothing:
If all of that checked out, the rental qualifies as a short-term rental and you can use the loss as a deduction against business or W-2 income. That is the green light. Now you move to depreciation, which decides how much that deduction is actually worth.
Most people depreciate a rental one way: the whole building, on one schedule, the same amount every year for decades.
That is not the only way to do it.
For tax purposes, a property is not one thing. It is many things: furniture, appliances, flooring. Certain electrical and plumbing work. Land improvements such as a driveway, landscaping, or a fence. Each of those has its own depreciable life, and it is much shorter than the building's. You can see how this gets complicated quickly.
A cost segregation study separates them out. Someone who does this for a living goes through the property and assigns each piece the class life it actually qualifies for, some at 5 years, some at 7, some at 15, instead of one number for the whole thing.
This is where the study turns into cash. Right now, anything with a class life of 20 years or less can be deducted in full, in the year you place it in service. It does not need to be spread out. You can apply all of it this year.
That is current law. 100% bonus depreciation was restored, permanently, for qualified property acquired and placed in service after January 19, 2025. Every 5-, 7-, and 15-year component the study identifies falls under that 20-year line.
If you decide to do these two things together, the sequence is everything. Qualify the rental as a true short-term rental first. Then run the cost segregation study to pull a much bigger slice of that property into this year's return, against everything else you earned.
Skip step one and the study will still run the numbers. It will still produce a large loss on paper. But without the short-term rental qualification, that loss goes right back to sitting passive. Do not put the cart before the horse.
Not sure your rental clears step one? That is exactly what a planning conversation is for. Schedule a Free Tax Strategy Session and we will look at where your property stands before you spend money on a study.
No. And yes, I know what you are thinking: you could use AI for this. Don't. Not yet.
A cost segregation study costs money, and it has to be run by someone who does this professionally. But on a property bought with the rest of this year in mind, the cost of the study is usually dwarfed by what it frees up.
Whether a study pays off depends on more than the two steps above. What you paid, what is in the building, and when you closed all factor in. Those details decide whether the study is worth doing on your property and how much it can free up this year.
If you want to talk it through, let's book a conversation.
A cost segregation study on a short-term rental separates the property into its components (furniture, appliances, flooring, certain electrical and plumbing work, and land improvements like a driveway, landscaping, or a fence) and assigns each one its own class life, typically 5, 7, or 15 years, instead of depreciating the whole building on one long schedule.
Not the whole property. The building itself stays on its long schedule. Under current law, the components a cost segregation study identifies with a class life of 20 years or less can be deducted in full in the year they are placed in service, through 100% bonus depreciation. That covers the 5-, 7-, and 15-year items the study pulls out.
Yes. Qualify the rental as a true short-term rental first, then run the cost segregation study. If the rental does not qualify, the study will still calculate the loss, but that loss stays passive instead of offsetting your business or W-2 income.
No. A cost segregation study has to be run by a professional who does this for a living. The study costs money, but on a property bought with this tax year in mind, the cost is usually dwarfed by the deduction it frees up.
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