Short-term rental income lands on Schedule E by default, even when stays average 2 nights. Schedule C applies only when you provide substantial services to guests, and that distinction carries a 15.3 percent price tag.
What counts as substantial services
The Schedule E instructions and IRS Pub 527 draw the line at services primarily for the guest's convenience that go beyond what a landlord customarily provides: cleaning the unit daily while guests are staying, changing linens mid-stay, serving meals, concierge or tour services, or guest transportation. Customary services do not change the schedule. Cleaning between guests, providing utilities and wifi, trash collection, repairs, and furnishing the unit are normal landlord behavior. Treasury Reg 1.1402(a)-4(c) applies the same standard for self-employment tax, excluding rental real estate income from SE tax unless the services rendered are primarily for the occupant's convenience. A typical Airbnb that is cleaned between bookings belongs on Schedule E. A bed and breakfast that serves food and cleans daily is running a lodging business and belongs on Schedule C.
The self-employment tax consequence
Schedule C profit is subject to SE tax of 15.3 percent, which is 12.4 percent Social Security up to the annual wage base plus 2.9 percent Medicare. Suppose your rental nets $38,000 after expenses. On Schedule E that profit carries only income tax. On Schedule C it also picks up roughly $5,370 of SE tax, 15.3 percent of 92.35 percent of the profit, softened slightly by the deduction for half of SE tax. The tradeoff is not entirely one-sided, since Schedule C profit is earned income that can support solo 401(k) contributions. For most hosts, though, Schedule E is the better outcome.
The 7-day rule does not move you to Schedule C
A persistent myth says that average stays of 7 days or less force Schedule C. Treasury Reg 1.469-1T(e)(3) decides whether the activity is a rental for passive loss purposes, not which schedule it files on. The standard short-term rental structure is Schedule E reporting with non-passive losses: average stay of 7 days or less, material participation under Reg 1.469-5T, no substantial services, and therefore no SE tax. That is exactly the combination that lets a cost segregation loss offset W-2 income without handing 15.3 percent back on future profits.
A loss year looks the same either way
In the year a cost segregation study front-loads depreciation, the property usually shows a paper loss, and there is no SE tax on a loss on either schedule. The schedule question matters most in later profit years, which is why adding hotel-style services after harvesting the big deduction can quietly convert rental profit into SE-taxed business income. Amadae prepares and files both schedules and applies the substantial-services test property by property rather than defaulting everything to one form. One caveat that trips up new hosts: state and local lodging taxes are a separate regime and apply no matter which federal schedule you file.