Short-Term Rental Cost Segregation: What STR Owners Should Know
Short-term rental cost segregation identifies property components that qualify for faster depreciation than the building itself. For owners of vacation homes, Airbnb properties, and other short-term rentals (STRs), an engineering-based study helps determine which components belong in shorter recovery periods.
The potential benefit depends on the property, its acquisition and placed-in-service dates, and the owner’s tax situation. A well-supported study gives your CPA a documented basis for evaluating those deductions.
How Short-Term Rental Cost Segregation Works
A cost segregation study separates a property’s depreciable basis into asset categories. Instead of treating every component as part of the building, the study identifies qualifying personal property and land improvements.
Common categories include:
| Asset category | Potential examples |
|---|---|
| 5-year personal property | Appliances, carpeting, and qualifying rental furnishings |
| 15-year land improvements | Qualifying fencing, landscaping, and site paving |
| Building and structural components | The building shell and structural systems that remain on the applicable building recovery period |
Classification depends on each asset’s function, installation, and use. Flooring, cabinetry, decks, and building systems do not automatically receive a shorter recovery period simply because they are part of an STR.
Land is not depreciable and must be excluded from the depreciable basis.
Is Short-Term Rental Property Depreciated Over 27.5 or 39 Years?
Under the general depreciation system, residential rental buildings generally use a 27.5-year recovery period, while nonresidential buildings generally use 39 years.
The correct recovery period depends on whether the building meets the statutory definition of residential rental property, including the income test and rules for transient accommodations. Average guest-stay length alone does not settle the classification. Your CPA should evaluate the property’s actual use.
This analysis is separate from the passive activity rules discussed below. A property’s treatment under those rules does not automatically determine its building recovery period.
Bonus Depreciation for Short-Term Rental Assets
Eligible shorter-life assets identified through cost segregation may qualify for bonus depreciation.
Current federal law generally provides 100% bonus depreciation for qualifying property acquired and placed in service after January 19, 2025, subject to eligibility requirements and elections. The building itself does not qualify merely because it operates as a short-term rental.
For an older property, the applicable bonus depreciation rate depends on its original acquisition and placed-in-service facts. Completing a study today does not automatically make older assets eligible for today’s rate.
Your CPA should also evaluate state conformity and any limitations affecting the use of the resulting deductions.
Illustrative Example: Separating Building and Shorter-Life Assets
Assume an investor purchases a short-term rental for $525,000, with $75,000 allocated to land and $450,000 of depreciable basis.
An engineering-based study identifies the following hypothetical allocation:
| Category | Illustrative allocation |
|---|---|
| 5-year personal property | $95,000 |
| 15-year land improvements | $25,000 |
| Remaining building basis | $330,000 |
| Total depreciable basis | $450,000 |
If the $120,000 of shorter-life assets meets all requirements for 100% bonus depreciation, that amount could qualify for a first-year depreciation deduction. Depreciation on the remaining $330,000 of building basis would be calculated separately using its applicable recovery period and the mid-month convention.
For comparison, treating the entire $450,000 as building basis would produce approximately $11,500 in annual depreciation over 39 years or $16,400 over 27.5 years in a full recovery year. First-year depreciation would be lower because of the mid-month convention. Separately identified furnishings and other assets may already receive shorter recovery periods without a cost segregation study.
A $120,000 deduction is not $120,000 in tax savings. The actual tax effect depends on the owner’s applicable tax rates, available income, and deduction limitations.
These allocations are illustrative, not an expected result for every STR.
Can STR Depreciation Offset Other Income?
A cost segregation study identifies depreciation opportunities. It does not determine whether an owner can use every deduction immediately.
Under the passive activity rules, an activity with an average customer-use period of seven days or less generally is not treated as a rental activity. Material participation and other applicable requirements must still be evaluated to determine how a loss is treated.
Personal use matters too. If personal use exceeds the greater of 14 days or 10% of the days rented to others at a fair rental price, the dwelling unit is generally treated as a home under Section 280A. This can limit deductible rental expenses and losses.
Basis, at-risk rules, and other loss limitations may also restrict deductions.
Keep records of guest stays, personal-use days, and your participation. Operating an Airbnb does not automatically make losses deductible against wages or other income.
Cost Segregation for an Existing Short-Term Rental
If you already placed an STR in service, you may still have an opportunity to review its depreciation treatment.
When the requirements for an accounting method change are met, your CPA may use Form 3115, Application for Change in Accounting Method, to implement revised depreciation treatment. A Section 481(a) adjustment may account for the difference between depreciation under the previous method and the amount allowable under the corrected method.
This may allow a catch-up deduction without amending earlier returns. The appropriate filing method and timing depend on the property’s history and applicable IRS procedures.
What to Prepare for a Benefit Analysis
Before requesting an analysis, gather:
- Purchase documents and the existing depreciation schedule.
- Acquisition and placed-in-service dates.
- Renovation invoices and improvement records.
- Details about rental operations and personal use.
- Your expected holding period and plans for a future sale.
If you have improved the property, our guide to cost segregation for renovated properties covers additional considerations.
Also consider how accelerated depreciation may affect a future sale. Review our discussion of depreciation recapture with your CPA as part of the broader decision.
Request a No-Cost Benefit Analysis
Considering cost segregation for your short-term rental? CSA Partners can review your property information and estimate the potential depreciation opportunity.
Our engineering-based approach supports asset classifications with property-specific analysis and documentation, helping you and your CPA evaluate whether a study makes financial sense.
Request a no-cost Benefit Analysis
This article provides general information. Actual results depend on property facts and applicable tax rules. Consult your CPA or tax advisor about your specific circumstances.