Does a Seasonal Airbnb Still Qualify for the STR Loophole?

People consistently get this formula wrong in both directions. The average period of customer use is total days actually rented divided by the number of separate stays. Days the property sat empty, days it was blocked, days you were fixing the furnace: none of them appear anywhere in the calculation. Vacancy neither rescues a failing average nor poisons a passing one.

That fragility is the seasonal owner’s real classification risk. With only 8 or 10 stays a year, every monthly or multi-week booking moves the average dramatically. A year-round property can absorb a 30-night booking; a seasonal one often cannot. Set maximum-stay limits on your listing during the season and check the running average before accepting anything long.

First, the 100 hours. The material participation thresholds are annual and are not prorated for a short operating season, the same principle covered in our late-closing guide. The good news: your hours do not have to occur during ski season. Pre-season prep, listing and pricing work, repairs you perform yourself, furnishing decisions, and post-season shutdown all belong to the activity. A defensible seasonal log usually looks like a mountain range: a tall peak around the season, foothills across the rest of the year. What it cannot look like is a flat line invented in April; see what hours count for the sorting rules.

Second, personal use. Here is the trap built into every seasonal property: the personal-use ceiling is the greater of 14 days or 10% of rented days. Rent 28 nights and 10% is 2.8, so the 14-day floor governs. The condo you bought because you love skiing gives you two personal weeks, in the exact months you want to be there. Fifteen family days across a 28-night rental season makes the property a residence under Section 280A, deductions cap at rental income, and the loss the whole strategy depends on evaporates. The full breakdown is in the vacation home personal use guide.

Frequently, yes, and this surprises people. Qualification is binary: pass the tests and the property’s depreciation, including the accelerated share from a cost segregation study, is fully in play against your W-2 income. The tax benefit is driven by the purchase price and your bracket, not by how many nights you rented. A $900K ski condo that legitimately qualifies delivers the same class of Year 1 deduction whether it earned 28 nights or 280 nights of revenue.

The honest counterweight: thin revenue means the property has to make sense as an investment on appreciation and your enjoyment of the remaining margin, and an examiner will expect the operation to look profit-motivated, market pricing, real listing effort, honest books. A seasonal STR run like a business is a fine loophole candidate. A seasonal STR run like an alibi is not.