Is a Short-Term Rental 27.5- or 39-Year Property?

The passive-activity seven-day rule and the building depreciation rule answer different questions. A short-term rental's average guest stay can affect passive classification without, by itself, proving a 39-year recovery period for the building.

Two rules that should not be merged

For passive-activity purposes, IRS Publication 925 says an activity generally is not a rental activity if average customer use is seven days or less. That exception can make material participation relevant to whether the activity's loss is passive. It does not state the building's depreciation class. A property may also face basis, at-risk, and personal-use limits. Analyze those questions separately rather than treating one booking statistic as a universal tax status.

For depreciation, IRS Publication 946 says residential rental property is a building or structure for which 80% or more of gross rental income comes from dwelling units. Its definition of a dwelling unit excludes a unit in a hotel, motel, or other establishment where more than half the units are used on a transient basis. Residential rental buildings generally have a 27.5-year GDS recovery period; nonresidential real property generally has a 39-year period. The classification turns on the building and its use under this rule, not automatically on the seven-day passive-activity threshold.

Compare clear cases with the harder STR case

An apartment building leased to residents on annual terms is a straightforward residential rental example. A hotel with guest rooms predominantly used on a transient basis is a straightforward nonresidential example. A single vacation home rented through a platform can require a closer analysis of the dwelling-unit and transient-establishment language, actual guest use, services, and the property's facts. Avoid assuming that every Airbnb is a hotel or that every house is automatically residential rental property.

The source records should include annual gross rental income, booking lengths, floor plan and unit count, guest policies, services provided, and any mixed personal use. A change from long-term leasing to transient lodging can also call for a change-in-use depreciation analysis. Preserve the original placed-in-service date, basis schedule, and dates the property was used differently.

How cost segregation fits

Neither a 27.5-year residential rental building nor a 39-year nonresidential building is itself short-life property for bonus-depreciation purposes. A properly supported cost segregation study may identify separate assets with shorter recovery periods, such as certain tangible personal property and land improvements. The exact class depends on the asset's function and law, not a fixed percentage of the purchase price. The building's base recovery period affects the comparison, but a study can be useful under either classification.

Qualified improvement property is another distinct question. It generally concerns qualifying interior improvements to nonresidential real property after the building was first placed in service, subject to statutory exclusions. Calling an STR nonresidential does not automatically make every renovation QIP. A new roof, building enlargement, and separately classified personal property require their own analysis.

Illustrative decision paths

Suppose an owner has 40 bookings totaling 200 guest nights. The average period of customer use is five days for the passive-activity rental exception. The owner still needs a separate building-classification workpaper under Section 168 and Publication 946. If the property meets the residential rental definition, the building may use 27.5 years; if it is an excluded transient lodging establishment, the building may use 39 years. The five-day calculation alone does not settle that choice.

In a second example, a 20-room hotel operates 18 rooms for transient guests and two for longer stays. The transient-establishment exclusion is more directly implicated. The owner still has to identify land, building, and any separate depreciable assets. The examples show how an average-stay result and a building-life result can be documented without treating them as the same test.

What the tax file should contain

Write a short memo with the property's facts, the 80% gross-income computation, unit use, why the transient-establishment language does or does not apply, and the resulting building schedule. Separately calculate average customer use for passive-activity purposes and maintain an owner participation log if loss treatment depends on material participation. Keep a third file for any personal-use days. This separation makes a later study, amended return, or property sale easier to review.

Primary references: IRS Publication 946 for recovery periods and residential-rental classification, and Publication 925 for the passive-activity stay exception. See the STR planning guide and the cost segregation documentation guide for related decisions.