Short-term rentals: the seven-day rule, stated carefully

What the rule actually says

Under the passive activity regulations, an activity is not a rental activity if the average period of customer use is seven days or less. That matters because rental activities are passive by default regardless of how much work you do.

Falling outside the rental definition means the automatic passive classification does not apply. It does not mean the activity is automatically non-passive.

The second half nobody quotes

Once outside the rental definition, the activity is tested under the general passive rules — which means you must materially participate under one of the seven tests to treat losses as non-passive.

The commonly used tests are more than 500 hours in the activity, substantially all of the participation, or more than 100 hours with no other individual participating more. Owners who self-manage typically qualify. Owners who hand everything to a full-service property manager typically do not, because the manager's hours exceed theirs.

Average period of customer use

Total rental days divided by number of bookings, per property, per year. A cabin averaging 4.2 nights across the year is inside the rule. The same cabin with three thirty-day winter bookings averaging out to 8.1 nights is not — for that year.

It is tested annually. A property that qualifies in 2025 may not in 2026.

Why the property reclassifies so well

Short-term rentals are furnished and equipped far beyond long-term rentals: furniture, mattresses, televisions, kitchenware, smart locks, noise monitors, hot tubs, game rooms. Outside, the amenity spend is heavy — pools and decking, outdoor kitchens, fire pits, pergolas, docks. Typical reclassification runs 20% to 32%.

Documentation

Contemporaneous time records. Not a reconstruction written the following March. A calendar or log showing date, hours and task, kept as you go. This is the evidence that decides the question if anyone asks, and the absence of it is the most common reason the position fails.

The honest warning

This has been an area of focus. The strategy is legitimate and widely used, but it depends entirely on facts you have to prove. If a property manager runs your bookings, cleaning, maintenance and guest communication, be realistic about whether you materially participate before building a tax position on the assumption that you do.