Summit County Short-Term Rental Tax

The Short-Term Rental Tax Loophole, Explained for Summit County Buyers

Written by Tucker Zimmerman, Summit County Realtor with Slifer Smith & Frampton.

More and more buyers bring this up before we have even looked at a property. They have heard about a tax strategy for short-term rentals, the Airbnb and VRBO kind, often shortened to STR, usually called a loophole, that can offset regular income. It is a real part of the tax code, not a gimmick, and it is getting a lot of attention again after the 2025 tax law. Here is the plain-English version of what people are talking about, and the actual IRS language behind it.

What people mean by the loophole

Normally, rental real estate is treated as passive. That matters because passive losses generally cannot offset your active income, the W-2 wages or business income most people live on. So a typical rental that shows a paper loss does not usually lower the tax on your salary.

Short-term rentals get treated differently. If the average guest stay is seven days or less, the activity is not considered a rental activity under the passive-loss rules. If you then materially participate in running it, the activity is treated like a business you are active in, and its losses can offset your other income. Combine that with a cost segregation study, which breaks a building into shorter-life components that depreciate faster, and bonus depreciation, which lets you take a large chunk of that depreciation up front, and a short-term rental can throw off a sizable paper loss in the first year. That first-year loss offsetting ordinary income is the whole reason people call it a loophole.

A hypothetical example: who it actually helps

This mostly benefits high earners with a lot of active income to offset. Here is a made-up but realistic example to show the shape of it. The numbers are illustrative, not a promise, and the real figures depend on the property and the tax work.

The actual IRS language

I would rather show you the real wording than paraphrase it. Two pieces of the regulations do the work.

Why a short-term rental is not treated as a passive rental. Treasury Regulation 1.469-1T(e)(3)(ii) lists when renting property is not a rental activity. The first condition is:

What "materially participate" means. Treasury Regulation 1.469-5T(a) sets out the tests. You generally need to meet one of them. The two people aim at most often are:

Where bonus depreciation stands now. The deductions that make the first-year loss large come from depreciation under Section 168(k). Under the 2025 tax law, often called the One Big Beautiful Bill Act, 100% bonus depreciation was restored and made permanent for qualifying property placed in service after January 19, 2025. How much applies to a given purchase depends on the property and the year, but the headline is simple: the big first-year deduction is back in full.

The part I can actually help with: can you run a qualifying rental here?

This is where a lot of the national content falls apart for Summit County buyers, and where I earn my keep. The entire strategy depends on actually operating a short-term rental with that seven-day-or-less average. In Summit County, whether you can do that on a specific property is a town-by-town, and sometimes zone-by-zone, question. Some towns cap the number of licenses and run waitlists. Licenses do not transfer when a property sells, so a unit renting today does not guarantee you can rent it tomorrow.

A beautiful condo that cannot hold a short-term rental license is a non-starter for this strategy, no matter how good the tax math looks on paper. That is the first thing I check for a buyer, before anyone spends money on a cost segregation study. Start with the Summit County short-term rental rules, then the specific town page, for example Breckenridge, Frisco, or Keystone. Because the mailing address is often the worst possible guide to which rules actually apply, confirm the jurisdiction on the Summit County GIS map. If you want the broader picture of how rental income really pencils out here, read my honest take on Summit County real estate as an investment.

What actually decides whether it works

None of these kill the strategy. They are the details that decide whether it fits you, and they are worth understanding before you buy.

Material participation is the real test. Look back at that 100-hour rule. It requires that nobody put in more time than you. If you hand the place to a full-service property manager who handles everything, the manager may easily out-hour you, and you could miss the test. Buyers who plan to be hands-on, or who structure their management carefully, are the ones this tends to fit. What counts as participation, and keeping track of it, is worth getting right from day one.

It is timing, not free money. Accelerated depreciation lowers the property's tax basis, and when you sell, some of that benefit can come back as depreciation recapture. The strategy is powerful for shifting the timing of taxes, but it is not a permanent erasure, so it is worth looking at the eventual sale, not just year one.

The details matter. How the seven-day average is measured, how much you personally use the home, your other income, and how Colorado treats it all factor in. This is normal planning, and it is the reason a one-size answer does not exist.

Who looks into this, and who skips it

It tends to fit buyers with meaningful active income to offset, who will own a property that can legally run a short-term rental here, and who are willing to be genuinely involved in operating it or to plan their management around the participation rules. It is usually not worth the effort for a buyer who wants a fully hands-off second home, or whose target property cannot hold a rental license in the first place. The honest first step is cheap: confirm the property can rent, then run your numbers.

Common questions

What is the short-term rental tax loophole?

It is the treatment of a short-term rental, one with an average guest stay of seven days or less, as a non-passive activity when the owner materially participates. That lets its losses, often amplified by cost segregation and bonus depreciation, offset active income like wages.

Who does the short-term rental tax strategy benefit most?

High earners with significant active income to offset, who own a property that can legally run a short-term rental and who materially participate in operating it. In a simplified example, someone earning about $500,000 who buys and self-manages a $1 million short-term rental might use cost segregation and bonus depreciation to lower first-year taxable income by around $250,000.

What is the seven-day rule?

Under Treasury Regulation 1.469-1T(e)(3)(ii)(A), if the average period of customer use is seven days or less, the activity is not a rental activity for the passive-loss rules. That is the doorway the strategy walks through.

Do I have to manage the rental myself?

You have to materially participate, which usually means meeting one of the IRS tests, such as more than 100 hours and more than anyone else, or more than 500 hours. If a property manager does most of the work, you may not qualify.

Is this legal?

Yes. It is based on the IRS passive-activity regulations, not a trick. It is also fact-specific and gets scrutinized, so it needs to be set up correctly for your situation.

Does 100% bonus depreciation still apply?

Under the 2025 tax law, 100% bonus depreciation was restored and made permanent for qualifying property placed in service after January 19, 2025. How much applies to your purchase depends on the details.

Do I have to be a real estate professional to use it?

No. The short-term rental path does not require real estate professional status, which is part of why it appeals to people with high W-2 income. The requirement is material participation in the activity.

Does my Summit County condo qualify?

The first question is whether the property can legally operate a short-term rental in its town and zone, which varies across Summit County and is not guaranteed. If it cannot, the strategy does not apply, no matter the tax math. I can check that for a specific property.

Can I use the loophole on an Airbnb or VRBO in Summit County?

Potentially, if the property can legally operate as a short-term rental in its town and you meet the IRS material participation rules. The tax treatment does not care whether you list on Airbnb, VRBO, or book guests yourself. What matters is the average stay being seven days or less and how involved you are. Whether the place can be licensed as a vacation rental here is the Summit County piece to check first.