If you’ve heard that a short-term rental can reduce taxes for high-income earners, your first question is probably, “How?”
The deduction doesn’t come from what you paid for the property or the rent it generates. It comes from cost segregation and bonus depreciation. These two tax tools work together to front-load a large portion of the property’s value as a first-year deduction.
Why the Default Depreciation Timeline Works Against You
When you buy something for your business, the IRS usually won’t let you deduct the full cost in the year you bought it. This rule also applies to rental properties. The default depreciation schedule is 27.5 years.
If you are looking to mitigate your taxes next year, the standard depreciation schedule won’t help. Take a $500,000 property and divide it across 27.5 years. The annual depreciation deduction is roughly $18,000.
While you eventually recover the cost over nearly 30 years, the yearly deduction is minimal. If you’re facing a $200,000 or $300,000 annual tax bill, that $18,000 annual deduction doesn’t make much difference.
The deeper problem is that the property is treated as a single entity with a 27.5-year life, rather than as a building made up of hundreds of different parts. The walls and foundation might last 50 years. Other things like the flooring, fixtures, and appliances wear out much faster.
Under the default schedule, everything is lumped together and depreciated equally over 27.5 years, including items that should be replaced much sooner. That means the deductions you’re entitled to take now get pushed into the future, where they don’t help you much.
Cost segregation is a tool that addresses this by dividing the property into its components and assigning each to the appropriate schedule.
What a Cost Segregation Study Does to That Timeline
A cost segregation study is a formal, engineering-based analysis of a property that breaks it into its individual components and assigns each to a depreciation schedule that better matches its typical lifespan.
The IRS already recognizes that different parts of a building wear out at different rates. Under the Modified Accelerated Cost Recovery System (MACRS), components can qualify for 5-, 7-, or 15-year schedules instead of the default 27.5-year schedule.
A cost segregation study’s job is to find every component that qualifies for one of those shorter timelines and document the case for moving it.
The things that typically get reclassified include:
- Certain flooring types
- Specialty lighting and electrical fixtures
- Cabinetry
- Appliances
- Landscaping
- Paving
- Decorative woodwork
- Certain plumbing components
None of these realistically lasts 27.5 years, and the IRS doesn’t require you to depreciate them that slowly; you just have to identify and document them properly.
A cost segregation study can reclassify a good portion of a short-term rental’s total property value onto faster schedules. The exact amount can depend on:
- Construction quality
- Age and condition of the components
- Extent of the improvements
- Study methodology
A CPA can be a big help with projections and answering questions.
How Bonus Depreciation Compresses Everything Into Year One
Cost segregation can move components from a 27.5-year schedule to a 5-year or 7-year schedule. While it’s an improvement, it still spreads the deduction across multiple years. This is where bonus depreciation kicks in.
Bonus depreciation allows those shorter-schedule assets to be combined into a single year.
Under Internal Revenue Code Section 168(k), certain qualifying property can be fully deducted in the first year. When the bonus depreciation rate is 100%, you don’t have to wait at all. The entire deduction can be applied in the first year.
The property doesn’t have to be brand new; it just has to be new to you.
Cost segregation identifies the components that qualify for shorter depreciation schedules. Bonus depreciation then makes those components fully deductible in year one. This portion of the property’s total value then becomes a single large deduction in the year you acquire the property.
Cost segregation and bonus depreciation work together to create a paper deficit, not a real loss. Your property doesn’t lose value. It still produces rental income. It still operates as an asset. Depreciation only reduces your taxable income on paper, while what you own and what you earn stay the same.
How the Tools Work Together in a Short-Term Rental
A typical long-term rental generates losses, but they are considered passive, and only passive losses can offset passive income. This situation doesn’t help most W-2 earners.
A short-term rental is different. If it’s operated by an owner who meets the material participation standard, the losses generated by cost segregation and bonus depreciation directly lower a high-salary income in the same year.
For example, if a property owner acquires a qualifying short-term rental and commissions a cost segregation study, the study might identify $175,000 in components eligible for bonus depreciation. At a 100% bonus depreciation rate, if the owner meets the material participation standard, that full amount can be deducted against W-2 income in year one.
The actual outcomes vary depending on the property’s condition, cost segregation results, applicable depreciation rates, and your tax situation. A managing partner or CPA can give you more property-specific estimates.
What the OBBBA Changed About Bonus Depreciation
For the past several years, bonus depreciation was being phased out. The One Big Beautiful Bill Act (OBBBA), passed in 2025, permanently restored it to 100% for properties acquired and placed in service after January 19, 2025. The full deduction is available on eligible acquisitions going forward.
A few things to know before making any plans:
- Acquisition date: The rate that applies is determined by when you signed your contract, not when the property closed.
- State conformity: Many states don’t follow federal bonus depreciation rules, and state tax obligations should also be evaluated.
- Tax law changes: The 100% bonus depreciation rate is permanent under current law, but legislation can and does change. Treat any projection as an estimate.
What This Means for Your Tax Bill
The short-term rental tax strategy isn’t just one thing. It’s three separate things working together. Material participation establishes that your losses are non-passive. Cost segregation identifies the components of your property that qualify for faster depreciation. Bonus depreciation makes those components fully deductible in year one.
When all three are in place, a big portion of your property’s value becomes a first-year deduction against the W-2 income driving your tax bill. A managing partner familiar with real estate and STR tax strategy is a good place to start.
