I get asked about the short-term rental (STR) loophole on almost every call I have with investors, and there’s a lot of bad information out there.

The short version is that the loophole lets you use losses from a rental, mostly depreciation, against your W-2 or business income, as long as your average guest stay is 7 days or less and you materially participate in running the property.

Both tests have to hold up every year. Below I’ll walk you through each one, show you how cost segregation makes the losses big enough to matter, and cover the mistakes I see most.

The 7-Day Rule: What Qualifies as a Short-Term Rental

Normally, rental income is passive under IRC §469. Passive losses can generally only offset passive income, so the depreciation on a typical long-term rental can’t touch your W-2 or business income unless you qualify as a real estate professional.

The STR loophole isn’t really a loophole. It’s an exception written into the passive activity rules. Under Temp. Reg. §1.469-1T(e)(3)(ii), your property isn’t treated as a “rental activity” at all if:

  • Your average period of customer use is 7 days or less, or
  • Your average period of customer use is 30 days or less and you provide significant personal services.

If you meet one of those, the tax code treats the property as a regular business for passive-loss purposes. That’s half the strategy. The other half, material participation, which I'll get to next.

How to calculate your average stay

Your average period of customer use is total rental days divided by the number of separate stays. If you rented 210 nights across 35 bookings, your average is 6 days and you’re in. Leave your personal-use days out of the math. Pull the numbers from your booking platform at year-end and save the export. That’s the number you’ll need if the IRS ever asks.

What counts as significant personal services

If your average stay is between 8 and 30 days, you need significant personal services to qualify. It depends on the facts: how often you provide the services, how much labor they take, and what they’re worth compared to the rent. Routine items like utilities, repairs, trash collection, common-area maintenance, and security generally don’t count. Recurring maid or linen service during a stay, meals, transportation, or recreational equipment are stronger examples. Cleaning only between guests usually isn’t enough by itself.

How the STR Loophole Works with Material Participation

Passing the average-stay test gets your STR out of the “rental activity” bucket, but your losses are only nonpassive if you materially participate in the property that year. That means meeting at least one of seven IRS tests, and for most STR owners, that means logging more than 100 hours and outworking everyone else on the property.

The three tests STR owners actually use

  • More than 500 hours on the property during the year.
  • Substantially all of the participation in the activity is yours, counting everyone, not just owners.
  • More than 100 hours, and no other individual participates more than you.

There are four other tests (prior-year history, personal service activities, and a facts-and-circumstances test), but they rarely fit a newer STR owner.

Why your property manager and cleaners matter

The tests count everyone’s hours, not just the owners’. If your property manager or cleaning crew puts in 150 hours and you put in 120, you fail the 100-hour test even though you cleared 100. This is the most common way I see investors lose the loophole. If you hand the property to a full-service manager, you probably won’t qualify. The good news is that your spouse’s hours count together with yours.

Which hours count

Hours that count: guest messaging, scheduling, buying supplies, coordinating repairs and turnovers, managing pricing, and working on the property directly. Hours that usually don’t: investor-type work like reviewing financial statements, monitoring performance, or researching your next deal.

How to document your hours

You don’t need a minute-by-minute daily log, but you do need records that hold up. Keep a running record of what you did and roughly how long it took, and back it up with calendars, guest messages, invoices, mileage logs, platform records, and vendor texts. A spreadsheet you rebuild from memory in April is exactly what loses in an audit.

How Cost Segregation Supercharges the STR Loophole

Material participation makes STR losses usable against your other income. Cost segregation makes those losses big enough to matter. A cost seg study breaks your property into shorter-life components, so you can deduct a big chunk of the purchase price in year one instead of spreading it over 27.5 or 39 years.

How the Reclassification Works

Without a study, your building (not the land) is depreciated over 27.5 or 39 years, and many STRs with mostly short-stay guests end up on the 39-year schedule. A cost seg study identifies the parts of the property that qualify for shorter-life treatment, often 5-, 7-, or 15-year property depending on the asset and how the property is used. For an STR, that usually means furniture, appliances, and certain fixtures in the shorter buckets, and land improvements like driveways, landscaping, fencing, and pools in the 15-year bucket. The exact split depends on your property, and that’s what the engineering study is for.

Where Bonus Depreciation Fits

As of 2026, the One Big Beautiful Bill Act permanently restored 100% bonus depreciation for qualifying property acquired after January 19, 2025 and placed in service after that date. Everything a study moves into 5-, 7-, and 15-year property can generally be written off in the year the property goes into service.

If you acquired the property before January 20, 2025, including under a binding contract signed before that date, you’re still on the old phase-down: 40% for property placed in service in 2025 and 20% in 2026.

What It Looks Like in Practice

Say you buy a $600,000 STR and $120,000 of that is land. If a study reclassifies 25% of the remaining $480,000 into shorter-life property, and that property qualifies for 100% bonus, you’re looking at roughly $120,000 of first-year depreciation (plus regular depreciation on the rest of the building).

If you pass both tests, you can put that against your W-2 income. At a 35% bracket, that’s about $42,000 in tax you’re not paying this year, and you can put that cash into your next property. Every property is different, so treat this as an illustration, not a projection.

The Limits That Still Apply

Nonpassive losses still have to clear the basis and at-risk rules and the excess business loss limitation, and some of that depreciation can be recaptured when you sell.

Benefits of the STR Loophole for Real Estate Investors

The benefits of utilizing the STR loophole can be significant:

  • Tax Advantages: One of the biggest advantages is the ability to use depreciation and other expenses from your STR to offset active income.
  • Increased Cash Flow: By paying less in taxes, you’ll have more cash available for other investments, renovations, or simply to boost your overall portfolio performance.
  • Flexibility: STRs offer flexibility both in terms of the type of service you provide and how you manage them, allowing you to be more hands-on and take advantage of the tax benefits without needing to make real estate your full-time gig.

5 Mistakes That Can Cost You the Loophole

1. Getting the average-stay math wrong. The rule is 7 days or less on average, not less than 7. A 7.0-day average qualifies and a 7.3 doesn’t. Track every booking, including direct ones, and check your average before year-end so you can adjust if you’re drifting.

2. Treating material participation as a formality. The hours test is where most claims fall apart. See the material participation section above, especially the part about property managers.

3. Mixing long-term and short-term rentals. Each property’s average stay is generally measured on its own, and a property that switches from long-term to short-term mid-year can land on the wrong side of the line. Keep separate booking records and books for each one.

4. Assuming your STR goes on Schedule C. The STR exception is a passive-activity rule. It doesn’t decide Schedule C reporting or self-employment tax. Many STRs with short stays but no substantial services still go on Schedule E.

5. Waiting until tax season to plan. The year you buy matters most, because that’s when bonus depreciation hits. Line up the cost seg study and start your hours log the day the property goes live, and bring your CPA in before year-end, not in April.

3 Questions to Answer Before You Buy an STR for Taxes

If you’re weighing a short-term rental tax strategy, answer three questions honestly first.

1. Will the average stay really land at 7 days or under?

2. Will you, not a manager, put in the most hours?

3. And are you buying (or did you buy) after January 19, 2025, so the cost seg numbers get full bonus treatment?

If all three are yes, this is one of the strongest moves available to a W-2 earner. If any of them is shaky, figure that out before you close, not after.

If you’re buying an STR this year, or you bought one and haven’t had a cost seg study done, let’s look at the numbers together. Request a free proposal and my team will show you what a study could reclassify on your property.