Guide · 6 min read · Updated August 2026
The 100-Hour Material Participation Test (And Its Second Half)
The 100-hour test is the one most short-term rental owners rely on, and the one most often misunderstood. The hours are the easy half. The comparison is the half that fails.
What the test actually says
You participate more than 100 hours during the year, AND no other individual participates more than you. Both halves have to be true. Clearing 100 hours on its own proves nothing if someone else cleared more.
“Any other individual” is broad. It is not limited to owners or to people you employ. Your cleaner, your co-host, your handyman, the property manager, a contractor doing turnovers — all of them count, whether or not they have any ownership interest and whether or not you pay them directly.
The arithmetic that catches people
Consider a property with 40 turnovers in a year and a cleaner who spends three hours on each. That is 120 hours from one person. An owner who logged 110 hours and felt comfortably past the threshold has in fact failed the test, and would not know it without having tracked the cleaner at all.
This is why the cleaner’s hours are not an optional nicety in your records. They are part of your evidence. Without them you cannot demonstrate the second half of the test in either direction.
How to track other people’s hours without chasing them
You do not need timesheets signed in triplicate. You need a defensible, consistent basis:
- Count turnovers from your booking calendar and apply a realistic per-turnover figure you can justify.
- Keep the cleaner’s invoices — if they bill hourly, the invoice is the record.
- Note it per property, per year, and write down the method you used so it can be explained later.
- Update it as you go rather than estimating the whole year at filing time.
If the comparison is close
When your total and your cleaner’s are within a few hours of each other, the position is fragile — a single disallowed entry can flip it. Two ordinary responses: do more of the work yourself, or track the 500-hour test instead, which has no comparison requirement at all. Which is realistic depends on your situation and is worth raising with your CPA before year end, while there is still time to act.
Track both sides in one place
STR Tracker keeps your hours and every other participant’s hours side by side, shows the comparison live rather than at filing time, and exports both in a single report — so the second half of the test is documented, not assumed.
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STR Tracker is a record-keeping tool and does not provide tax, legal, or accounting advice. This guide is general information, not advice about your situation — consult a qualified tax professional.