STR 39-Year Recovery Period and Nonresidential Property (2026)

Most short-term rental owners assume their property depreciates over 27.5 years like any residential rental. For a genuine short-term rental, that is usually wrong.

Under IRC Sec. 168(e)(2)(A), residential rental property requires that 80% or more of gross rental income come from dwelling units, and the definition of a dwelling unit excludes units in an establishment where more than half the units are used on a transient basis. A property rented in stays of a week or less is transient.

That pushes the structural component to a 39-year nonresidential schedule. It matters less than it sounds, and it matters more in one specific case.

The Transient Use Exclusion

IRC Sec. 168(e)(2)(A)(ii)(I) provides that a dwelling unit does not include a unit in a hotel, motel, or other establishment where more than half the units are used on a transient basis.

There is no bright line defining transient in this provision, but the widely applied standard follows the average period of customer use, and stays of 30 days or less are generally treated as transient.

A single-family home rented on Airbnb with an average stay of four nights is functioning as transient lodging. The structure is nonresidential real property with a 39-year recovery period under IRC Sec. 168(c).

A property rented on annual leases is plainly residential at 27.5 years. A mid-term rental with 60 to 90 day stays is residential as well, since those stays are not transient.

The awkward zone is 8 to 29 day average stays, which are too long for the passive activity seven-day exception and arguably short enough to be transient for the depreciation classification. Owners in that zone can face the worst of both: a 39-year schedule and a rental activity classification.

Why It Usually Does Not Matter Much

The difference between 27.5 and 39 years applies only to the structural component. A cost segregation study moves 20% to 30% of basis into five-year and 15-year property that is bonus eligible under IRC Sec. 168(k) regardless of the structure's recovery period.

On a property with $700,000 of depreciable basis and 26% reclassification, $182,000 is fully deductible in year one either way. The remaining $518,000 of structure produces $18,836 annually at 27.5 years versus $13,282 at 39 years.

The annual difference is $5,554, which at a 37% rate is about $2,055 per year. Real, but not decisive.

By comparison, the material participation determination on the same property is worth $67,000 in year one. The classification question is a rounding error next to it.

Where It Does Matter

Conversion. An owner who operates a property as a short-term rental and later converts it to long-term rental, or the reverse, has a change in the property's classification.

The recovery period is generally determined when the property is placed in service, and a change in use triggers the rules in Treasury Regulation Sec. 1.168(i)-4. A change from nonresidential to residential use, or the reverse, requires computing depreciation for the year of change and subsequent years as though the property had been originally placed in service with the new classification, using the adjusted basis at the beginning of the year of change.

Owners who flip between STR and LTR operation, which is common when occupancy or regulation changes, need to track this rather than continuing on the original schedule.

Qualified improvement property. QIP under IRC Sec. 168(e)(6) applies only to nonresidential real property. An STR classified as nonresidential can treat qualifying interior improvements as 15-year QIP with full bonus eligibility. A residential rental cannot.

This is genuinely favorable and cuts the other way from the recovery period. An owner who renovates the interior of a nonresidential short-term rental may deduct that work in year one rather than over 27.5 years.

The Bonus Depreciation Interaction

Neither 27.5-year nor 39-year property is bonus eligible. Bonus depreciation under IRC Sec. 168(k) applies only to property with a recovery period of 20 years or less.

So the structural classification question never affects the bonus depreciation available. What affects it is the reclassification percentage from the cost segregation study, which is driven by the property's components rather than by its recovery period.

Short-term rentals typically reclassify well because they are furnished. Furniture, appliances, electronics, housewares, decor, and outdoor equipment are all five-year property, and a fully furnished property carries $25,000 to $70,000 of it.

Documenting the Classification

The classification should be supported by the property's actual operating data: average length of stay pulled from the booking platform or property management system, occupancy, and booking counts.

That same data supports or undermines the passive activity analysis, so it is worth pulling annually and retaining regardless.

Where a property's operating model changes materially, document the change and the date, since it affects both the depreciation classification and the passive activity treatment from that point forward.

Worked Example: Classification and Renovation

An investor acquires a $840,000 beach property, furnishes it for $46,000, and operates it with an average stay of 5.3 nights. Land is allocated at $180,000, leaving $660,000 of depreciable building basis.

The property is nonresidential real property on a 39-year schedule because more than half the use is transient.

A cost segregation study reclassifies 27%, producing $178,200 of five-year and 15-year property, all bonus eligible. The $46,000 of furnishings is separately five-year property, fully deductible.

Structural basis of $481,800 depreciates at $12,354 annually rather than $17,520 under a 27.5-year schedule, a difference of $5,166 per year.

Two years later the owner spends $118,000 renovating the interior. Because the property is nonresidential, the qualifying portion is QIP under IRC Sec. 168(e)(6), carrying a 15-year life with full bonus eligibility. Roughly $96,000 of the renovation is deductible in the year placed in service.

Under a 27.5-year residential classification, QIP would have been unavailable and the same renovation would have depreciated over 27.5 years at roughly $3,490 annually.

The 39-year classification cost $5,166 per year on the structure and saved roughly $92,000 in the renovation year. On net, it was favorable.

Frequently Asked Questions

Is my Airbnb 27.5-year or 39-year property?

Generally 39-year nonresidential property if the average stay is short enough to be transient. IRC Sec. 168(e)(2)(A) excludes from dwelling units any unit in an establishment where more than half the units are used on a transient basis, and stays of 30 days or less are generally treated as transient.

How much does the difference cost me?

Less than most owners expect. On $500,000 of structural basis, the annual difference is roughly $5,500 of depreciation, or about $2,000 of tax at a 37% rate. The material participation determination on the same property is worth far more.

Does the classification affect bonus depreciation?

No. Bonus depreciation under IRC Sec. 168(k) applies only to property with a recovery period of 20 years or less, so neither 27.5-year nor 39-year structure is eligible either way. The reclassified five-year and 15-year components are bonus eligible regardless.

Is 39-year classification ever better?

Yes, for renovations. Qualified improvement property under IRC Sec. 168(e)(6) applies only to nonresidential real property. An owner renovating the interior of a nonresidential STR can deduct the qualifying work in year one, which a residential rental owner cannot.

What happens if I convert from short-term to long-term rental?

The classification changes, and Treas. Reg. Sec. 1.168(i)-4 governs. Depreciation for the year of change and later years is computed as though the property had originally been placed in service under the new classification, using adjusted basis at the beginning of the year of change.

Why Your Short-Term Rental Is 39-Year Property, Not 27.5