The short-term rental loophole: using STR losses against W-2 income

Rental losses are normally passive and can only offset passive income. The so-called short-term rental loophole is not a special provision. It follows from the way the passive activity regulations define a "rental activity."

The seven-day rule

Treasury Regulation §1.469-1T(e)(3)(ii) excludes from the definition of rental activity any property where:

• The average period of customer use is seven days or less, or
• Customer stays average 30 days or less and you provide significant personal services, such as daily cleaning, concierge service or meals.

Average stay equals total rental days divided by the number of separate stays, and days you or your family use the property don't count as rental days. Personal use also needs monitoring. If it exceeds the greater of 14 days or 10% of the days rented, §280A treats the property as a home, caps deductions at rental income, and allows no loss at all.

Because the activity is not a rental, the per-se passive rule for rentals doesn't apply, and you don't need real estate professional status. Whether the losses are passive or nonpassive then depends on a single question, which is whether you materially participate.

Material participation tests that STR owners use

The regulations provide seven tests, and in practice STR owners rely on three:

1. Participation of more than 500 hours in the activity during the year.
2. More than 100 hours of participation, and not less than any other individual, including cleaners and property managers.
3. Substantially all of the participation in the activity is yours.

Spouses' hours are combined for material participation. A property manager who handles everything will usually defeat test 2, so this strategy fits owners who self-manage or who use a manager only for limited tasks.

Key numbers: average stay of 7 days or less · more than 100 hours and at least as many as anyone else, or more than 500 hours · first-year deductions boosted by 100% bonus depreciation on furnishings and land improvements.

A worked example

A couple with $450,000 of W-2 income buys a $900,000 mountain cabin in February 2026 and manages it themselves. The average stay is 3.8 nights. They log 160 hours, and the cleaner logs 110. A cost segregation study supports $230,000 of first-year depreciation, and after operating income the property shows a $190,000 loss.

Because the activity is not a rental and they materially participate, the $190,000 loss is nonpassive. After the $32,200 standard deduction, their taxable income is about $417,800, so the first $14,250 of the loss saves tax at 32% and the rest at 24%. The federal tax reduction is about $46,700 in 2026.

In Connecticut

Because Connecticut's income tax starts from federal AGI, the seven-day rule carries over, but the state adds back the bonus depreciation in a first-year loss and returns it at 25% a year over the next four years. Stays of 30 days or less in a furnished home are also subject to the state's 15% room occupancy tax. Booking platforms that meet the facilitator threshold collect it, while direct bookings require your own DRS registration and Form OP-210 returns. See our Connecticut investor guide.

Documentation the IRS asks for

• A contemporaneous log showing the date, the task, the time spent and who did the work.
• Booking platform reports showing each stay and its length.
• Evidence of other people's hours, such as cleaner invoices and manager reports, to prove you exceeded them.

The regulations accept any reasonable proof, including calendars and appointment books, but courts regularly reject vague hour estimates pieced together at filing time.

Common mistakes

1. Counting investor-type hours, such as reviewing statements, which generally don't count unless you are directly involved in day-to-day management.
2. Mixing STR nights and 30+ day stays across the year without recalculating the average.
3. Forgetting that the losses are still subject to the excess business loss limitation for very large amounts.
4. Treating the property as a Schedule C business without considering self-employment tax when substantial services are provided.

How Summer Associates helps

Summer Associates' real estate tax team sets up hour-tracking templates before you close, models the year-one loss with a cost segregation estimate, and reviews your average-stay calculation before the return is filed.

This guide is general education based on federal and Connecticut law as of 2026-11-15. State rules differ and facts matter. Before acting, get advice for your situation from Summer Associates or another qualified advisor.