How the STR strategy works

Under Treas. Reg. §1.469-1T(e)(3)(ii)(A), an activity is not treated as a rental activity if the average period of customer use is 7 days or less. That single sentence is the entire foundation of the STR strategy — and it has nothing to do with being a real estate professional.

If your STR is not a rental activity and you materially participate, the activity is non-passive. Non-passive losses offset every other category of income on your return — wages, self-employment, K-1 active income, capital gains.

The four conditions

  • Average stay ≤ 7 days. Calendar-year average across all rental periods. Pull it from your Airbnb / VRBO statement.
  • Material participation. Most hosts qualify under the 100-hour-and-more-than-anyone-else test or the 500-hour test.
  • Cost segregation study. Generates the large year-one loss.
  • Property placed in service. The clock starts when the unit is first listed and available, not when you bought it.

Reclassification benchmark

STRs typically reclassify 20–30% of depreciable basis — often higher than long-term rentals because furniture, appliances, decor, and entertainment systems are usually included in the purchase or capitalized as part of the rental setup.