Material participation is the legal standard used by the IRS to determine if a taxpayer’s involvement in a business is "regular, continuous, and substantial" . For the STR owner, meeting this standard is the key to unlocking the ability to deduct rental losses against active income. The IRS provides seven distinct tests. You only need to pass one of these tests in a given tax year to be considered a material participant .

The Primary Tests for STR Owners

While there are seven tests, most short-term rental owners focus on the first three, as they are the most practical for someone managing a property alongside a full-time job.

Test One: The 500-Hour Rule

The most straightforward way to qualify is to participate in the activity for more than 500 hours during the tax year . This averages out to about 10 hours per week. For an owner with multiple properties, this is often the easiest target. Activities that count toward these hours include cleaning, communicating with guests, performing repairs, landscaping, and managing bookings.

Test Two: The "Do Everything" Rule

You qualify if your participation in the activity constitutes substantially all of the participation in that activity for the year . This means if you are the only person doing work on the property—no cleaning crews, no property managers, no outside contractors—you participate materially, even if you only spend 50 hours total. However, this is difficult for STRs because most owners hire professional cleaners between guests.

Test Three: The 100-Hour and "More Than Anyone Else" Rule

This is the "sweet spot" for many STR investors. You qualify if you participate for more than 100 hours and your participation is not less than the participation of any other individual .

Example: If you spend 120 hours managing your STR and your cleaning person spends 80 hours, you pass.
The Trap: If you hire a full-service property management company, they will almost certainly spend more time on the property than you, causing you to fail this test.

The Remaining Four Tests

While less common for beginners, the IRS provides four other avenues for qualification:
4. Significant Participation Activity (SPA): If you have multiple "significant participation activities" (businesses where you spend over 100 hours but don't meet other tests), and the total hours across all of them exceed 500 .
5. Prior Year Participation: If you materially participated in the activity for any five of the ten preceding taxable years .
6. Personal Service Activity: If the activity is a personal service (like health, law, or consulting) and you participated for any three prior years .
7. Facts and Circumstances: A "catch-all" test where you participate for more than 100 hours and can prove your involvement was regular, continuous, and substantial based on all facts . This is the hardest to defend in an audit.

What Counts as Participation?

Not all hours are created equal in the eyes of the IRS. To satisfy the material participation tests, the work must be "customarily done by an owner" and must not be "investor work" .

Activity Type	Counts Toward Hours?	IRS Reasoning
Cleaning/Turnover	Yes	Necessary for the daily operation of the business.
Guest Communication	Yes	Essential for customer service and management.
Repairs/Maintenance	Yes	Standard owner-operator tasks.
Shopping for Supplies	Yes	Direct operational involvement.
Reviewing Financials	No (usually)	Classified as "investor work" unless directly involved in management .
Commuting	No	Commuting to a place of business is never deductible or countable .
Organizing Records	No (usually)	Considered investor/administrative work .

The "Investor Work" Distinction

The IRS is particularly skeptical of hours spent "reviewing financial statements," "preparing summaries of operations," or "managing the finances" in a way that a typical passive investor would . To count these hours, you must be able to show you were involved in the day-to-day management. If you are simply looking at your bank account to see if the rent hit, those hours are disqualified.

Case Study: The "100-Hour" Strategy in Action

Consider Sarah, a software engineer earning $200,000 a year. She buys a short-term rental in a mountain town.

Her Involvement: She spends 110 hours over the year managing the listing, responding to guest inquiries, and doing minor repairs during her visits.
The Cleaner: She hires a local cleaner who spends 90 hours total over the year.
The Result: Sarah meets Test Three (over 100 hours and more than anyone else). Her STR is now an "active" business.
The Tax Benefit: Sarah uses cost segregation to generate a $60,000 depreciation loss. Because she materially participated, she can subtract that $60,000 from her $200,000 salary, paying taxes on only $140,000. This could save her roughly $15,000–$20,000 in actual cash.

Frequently Asked Questions (FAQs)

Can my spouse’s hours count? Yes. Participation by a spouse counts toward the material participation requirement, even if the spouse does not own an interest in the property or file a joint return .
Do I have to meet the test every year? Yes. Material participation is determined on a year-by-year basis. If you meet it in 2024 but hire a manager in 2025 and stop working, the 2025 income/losses become passive .
What if I have multiple STRs? You can choose to "group" your activities. If you group three STRs into one activity, you only need to meet the 500-hour or 100-hour test for the entire group rather than for each individual house.