What is the STR loophole?

A name for how some short-term rentals fall outside the tax definition of a "rental activity". If the average stay is 7 days or less and you materially participate, losses may be treated as nonpassive and can offset other income such as wages.

Does it help rental arbitrage operators?

Much less than owners. The big benefit comes from depreciating the building, which a tenant doesn't own. A leaseholder's losses come mostly from furniture, equipment and start-up costs. A profitable unit has no loss to use.

What counts toward material participation?

Work you do on the rental: guest messaging, cleaning, restocking, maintenance, bookkeeping. Keep a dated log. In most cases a spouse's hours count too.

What are the hour tests?

The two most used are more than 500 hours in the year, or more than 100 hours and not less than any other individual. Other tests exist.

Should I rely on this tool?

No. It shows which tests appear to be met from the numbers you enter. Confirm with a qualified tax professional before filing.

STR Loophole Checker

Check the two tests behind the short-term rental tax loophole, and what they mean if you lease.

Written by RentalArbitrage AdminUpdated: October 2026

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The “STR loophole” is one of the most searched tax topics among short-term rental hosts, and one of the most misunderstood by rental arbitrage operators. This checker runs the two tests that decide whether it can apply, then explains what changes when you lease the property instead of owning it.

The Two Tests

Average stay. Under the passive activity rules, a rental where the average guest stay is 7 days or less is generally not treated as a “rental activity”. A stay of 30 days or less can also qualify if you provide significant personal services.
Material participation. You must work on the activity regularly and substantially. The common tests are more than 500 hours in the year, or more than 100 hours and not less than any other individual, such as your cleaner or co-host.

If both tests are met, losses from the activity may be treated as nonpassive, which means they may offset other income such as wages.

Worked Example

A leased unit averages 3.5-night stays. You spend 160 hours on it in the year; your cleaner spends 90. The average stay is under 7 days, and 160 hours is over 100 and more than anyone else’s. Both tests appear to be met.

But you lease the unit, so there is no building to depreciate. The tax loss can only come from costs you bear, such as furniture you own, equipment and start-up costs. If the unit makes a profit, there is no loss to offset anything.

Why Owners and Operators Get Different Results

For an owner, the building’s depreciation, sometimes accelerated with a cost segregation study, can create a large paper loss in the early years. That is where the loophole’s reputation comes from. A rental arbitrage operator doesn’t have that asset, so the loophole usually matters little.

Keep Records Either Way

Material participation is decided by your actual hours, and you have to be able to show them. Keep a dated log of tasks and time.

Frequently Asked Questions

What Is the STR Loophole?: A name for how some short-term rentals fall outside the tax definition of a "rental activity". If the average stay is 7 days or less and you materially participate, losses may be treated as nonpassive and can offset other income such as wages.
Does It Help Rental Arbitrage Operators?: Much less than owners. The big benefit comes from depreciating the building, which a tenant doesn't own. A leaseholder's losses come mostly from furniture, equipment and start-up costs. A profitable unit has no loss to use.
What Counts Toward Material Participation?: Work you do on the rental: guest messaging, cleaning, restocking, maintenance, bookkeeping. Keep a dated log. In most cases a spouse's hours count too.
What Are the Hour Tests?: The two most used are more than 500 hours in the year, or more than 100 hours and not less than any other individual. Other tests exist.
Should I Rely on This Tool?: No. It shows which tests appear to be met from the numbers you enter. Confirm with a qualified tax professional before filing.