Generally, you should report your Airbnb activity on Schedule C if the average rental period for the property is less than 7 days or if the average rental is less than 30 days, and you provide substantial services that are primarily for your tenant's convenience.
If you provide substantial services that are primarily for your tenant's convenience, such as regular cleaning, changing linen, or maid service, you report your rental income and expenses on Schedule C. Substantial services don’t include the furnishing of heat and light, cleaning of public areas, trash collection, etc.
Further discussion of “substantial services,” from IRS Pub. 334:
Trailer park owner: Rental income from a trailer park is subject to SE tax if you are a self-employed trailer park owner who provides trailer lots and facilities and substantial services for the convenience of your tenants.
You are generally considered to provide substantial services for tenants if they are primarily for the tenants' convenience and are not normally provided to maintain the lots in a condition for occupancy. Services are substantial if the compensation for the services makes up a material part of the tenants' rental payments.
Examples of services that are not normally provided for the tenants' convenience include supervising and maintaining a recreational hall provided by the park, distributing a monthly newsletter to tenants, operating a laundry facility, and helping tenants buy or sell their trailers.
Examples of services that are normally provided to maintain the lots in a condition for tenant occupancy include city sewerage, electrical connections, and roadways.
Hotels, boarding houses, and apartments: Rental income you receive for the use or occupancy of hotels, boarding houses, or apartment houses is subject to SE tax if you provide services for the occupants.
Generally, you are considered to provide services for the occupants if the services are primarily for their convenience and are not services normally provided with the rental of rooms for occupancy only. An example of a service that is not normally provided for the convenience of the occupants is maid service. However, providing heat and light, cleaning stairways and lobbies, and collecting trash are services normally provided for the occupants' convenience.
Schedule E is appropriate for rentals, with an average rental period of seven days or more, and you do not provide substantial services to the renters.
Please see also this TurboTax tips article for Airbnb users.
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