The Short-Term Rental Tax Strategy: How Cost Segregation Fits In

Short-term rental investors have access to a tax treatment that most long-term rental owners do not: the ability to use rental losses to offset W-2 and business income. This is not a loophole. It is how the IRS classifies qualifying STR activity, and cost segregation is the mechanism that generates the loss in the first place.

How the IRS Classifies Short-Term Rentals

An average guest stay of seven days or less is one exception to the rental-activity definition for passive-loss purposes. Material participation must be established separately; more than 100 hours alone does not establish it.

Non-passive losses may reduce ordinary income, but other deduction limits can apply. Long-term rental losses generally follow passive-activity rules, subject to specific exceptions.

Where Cost Segregation Comes In

A cost segregation study reclassifies portions of your property from the standard 27.5-year residential depreciation schedule into shorter recovery periods: 5-year personal property, 7-year property, and 15-year land improvements. Those reclassified components then qualify for bonus depreciation, which allows you to deduct a percentage of their cost in the first year.

Eligible assets acquired and placed in service after January 19, 2025 generally qualify for 100% bonus depreciation. Contract dates, elections, and other requirements can change the outcome.

A study identifies asset classifications. Your tax preparer determines whether and when the resulting deductions can be used. The study does not establish material participation or guarantee an income offset.

A Common Path to Non-Passive Treatment

One common route combines these two conditions; other rental exceptions may apply:

• Average guest stay of 7 days or less. This is calculated across all stays during the tax year. Calculate the actual average; a platform listing does not establish the result.
• Material participation. You must meet one of the IRS's seven material participation tests. The most commonly used for STR investors is the 100-hour test: you spend more than 100 hours on the activity during the year, and no one else spends more hours than you. Read more about the specific requirements for material participation.

How the Pieces Work Together

Think of it as a three-step chain. First, the cost segregation study identifies and reclassifies short-lived assets. Second, bonus depreciation generates a large first-year deduction on those assets. Third, the STR classification and material participation determine that the resulting loss is non-passive and can offset your ordinary income.

A property can produce deductible expenses or losses without a cost segregation study. The study changes depreciation timing; it does not by itself establish a loss or determine whether that loss is non-passive.

100% Bonus Depreciation Is Back

Eligible assets acquired and placed in service after January 19, 2025 generally qualify for 100% bonus depreciation. Contract dates, elections, and other requirements can change the outcome.

Long-Term Rental Owners Still Benefit

Long-term rental losses generally face passive-activity limits. Real estate professional status and material participation in the rental activity must both be considered before treating those losses as non-passive.

Use the free calculator to estimate the first-year deduction for your property. For the full breakdown of current bonus rates, see Bonus Depreciation for Property Investors.