Cost segregation on a mid-term rental: why the 30-day guest changes how you use the deduction.

The mid-term rental — the thirty-plus-day furnished stay for a travel nurse, a relocating family, or a homeowner waiting out an insurance claim — has quietly become one of the most popular plays in residential real estate. It rents like a short-term rental (furnished, higher rent per door, better margins than an annual lease) without the nightly-turnover grind. Owners who’ve read about the “short-term rental loophole” usually assume the same tax magic carries over. Mostly it doesn’t — and the reason isn’t that the deductions are smaller. It’s who gets to use them, and when.

Does a cost segregation study still work on a mid-term rental?

Yes, and the study itself is no different. Cost segregation reclassifies the components of a property that wear out faster than the 27.5-year building — flooring, appliances, cabinetry, specialty electrical, window treatments, landscaping and driveways — into 5-, 7-, and 15-year buckets that are eligible for bonus depreciation. A furnished mid-term rental actually reclassifies on the higher end, closer to a short-term rental than to a bare long-term one, because you’re carrying the same furniture, appliances, and décor a nightly rental carries. The building doesn’t care how long your guest stays. What the length of stay changes is the passive-activity treatment of the loss the study creates.

Why a 30-day guest fails the short-term rental test.

The “loophole” isn’t really a loophole; it’s a definitional quirk in the passive-activity rules. An activity where the average guest stay is seven days or fewer is not treated as a “rental activity” at all. So if you materially participate, the loss is non-passive and can offset ordinary income — W-2 wages, business income, the works. There is a second door: an average stay of 30 days or fewer combined with significant personal services. A true mid-term rental clears neither. Your average lease runs 30, 60, or 90 days, so you are well past the seven-day line, and a furnished lease with a turnover clean is not “significant personal services.” The result: the IRS treats a mid-term rental as an ordinary rental activity, which is passive by default. If you want the seven-day test in detail, we walk through it in the short-term rental loophole, explained without the fluff.

A worked example: a $520K furnished mid-term rental.

Take a $520,000 furnished house set up for traveling professionals, placed in service in 2026. Strip out land at roughly 20% and you are left with about $416,000 of depreciable basis that would otherwise crawl along a 27.5-year schedule. A furnished mid-term rental commonly reclassifies around 30% of that basis into short-life property — call it $125,000 — though the real figure depends on the property and the furnishings.

Because the property was acquired after January 19, 2025, 100% bonus depreciation applies, so that entire ~$125,000 is deductible in year one rather than spread across the shorter schedules. At a 32% marginal federal rate, the deduction is worth roughly $40,000 in tax — before any state benefit. That number is real. The catch is whether you can use it this year.

So who can actually use the deduction now?

Because the loss is passive, it can only offset passive income unless you fit one of two profiles. The first is a real estate professional: clear the 750-hour and more-than-half-your-working-time tests, materially participate, and your rental losses turn non-passive — the ~$40,000 lands against ordinary income this year. The second is an owner with other passive income: if you have other rentals throwing off net taxable income, or passive K-1 income from another venture, the mid-term rental’s loss soaks that up first.

Everyone else banks it. The suspended loss is not lost — it parks on Form 8582, offsets passive income while you hold the property, and releases in full in the year you sell. The write-off is the same size; you just collect it later.

When the mid-term play still pencils.

Even suspended, the deduction has value, and a study is still worth running. The reclassification is permanent and done once, so the only open question is timing. Three things can turn a banked loss into a used one: you sell, and the suspended losses release against the gain and depreciation recapture; you later drop the average stay under seven days and convert to a short-term rental you materially participate in; or your circumstances change and you qualify as a real estate professional. Meanwhile the deduction sits there, audit-ready, waiting for income to meet it. The mistake we see is the owner who assumes the loophole applies, plans around wiping out a W-2, and gets surprised at filing — run the numbers before you count on it.

A study is cleanest in the first year the property is placed in service, so if you have just set up a mid-term rental, this is the year to look at it. You can estimate the reclassification in a couple of minutes; if you bought the property in an earlier year and already filed, that is a conversation for your CPA before you order anything.