Yes. You can convert a long-term rental to a short-term rental and use the loophole once the property qualifies, meaning an average guest stay of 7 days or less and material participation. The two traps are the conversion-year average (a prior long-term tenant counts in the calculation) and the switch from 27.5-year to 39-year depreciation.
Based on IRC §469, Treas. Reg. §1.469-1T(e)(3), and IRC §168, written from the perspective of an investor who has repositioned rentals.
Nothing stops you from converting
The tax code does not lock a property into long-term-rental status. The STR loophole is decided year by year based on how the property actually operated. If a property runs as a long-term rental for several years and then operates as a short-term rental with sub-7-day stays and your material participation, it qualifies as an STR for that year. The conversion itself is not a taxable event. You are changing how you use the asset, not selling it.
The nuance is all in timing and depreciation.
The conversion-year average is the first trap
The 7-day test uses the average period of customer use for the tax year, defined in Treas. Reg. §1.469-1T(e)(3)(iii) as total days of customer use divided by the number of customer-use periods. A long-term tenant who occupied the property for the first half of the year is one very long "period" in that average.
Why this matters: if a tenant lived there January through June (one period of roughly 180 days), then you ran 50 short-term bookings averaging 3 days in the back half of the year, that single long tenancy heavily weights the annual average.
Run the arithmetic. One 180-day tenancy is a single period. Add 50 short bookings that average 3 days each (150 customer-use days across 50 periods). Total customer-use days are 330 across 51 periods, for an average of about 6.47 days.
| Bookings in the year | Customer-use days | Periods | Average stay | Passes 7-day test? |
|---|---|---|---|---|
| One 180-day tenant + 50 short stays at 3 days | 330 | 51 | 6.47 days | Technically yes |
| One 180-day tenant + 20 short stays at 3 days | 240 | 21 | 11.43 days | No |
The first row clears 7 days only because a high volume of short bookings dilutes the long tenancy. Change the mix slightly and you blow the test. Relying on a literal reading where one giant 180-day period is blended in to drag the average under 7 is aggressive, and an examiner can challenge whether a property that housed a single tenant for half the year was really used by customers for 7 days or less on average.
The clean play: convert at a natural break, let the long-term tenant move out, and claim the loophole in the first full tax year the property runs as a short-term rental. That year your average is built entirely from short stays and there is nothing to argue about. If you want to see how a clean year pencils out, the STR Loophole Calculator runs the numbers.
For the mechanics of the average itself, see the 7-day rule explained.
Your depreciation life changes from 27.5 to 39 years
A long-term residential rental depreciates over 27.5 years under IRC §168. A short-term rental that qualifies under the loophole is treated as nonresidential property and depreciates over 39 years going forward. That sounds like a downside, and on the building shell it is slightly slower.
The shell rate is not where the money is. The value in a conversion comes from two places:
- Reclassification. Once the property qualifies, your losses are nonpassive and can offset W-2 and other active income. That is the whole point of the loophole, covered in the 100-hour material participation test.
- Cost segregation. Breaking the building into 5, 7, and 15-year components lets you accelerate depreciation and, where eligible, apply bonus depreciation. That is the lever that produces a large first-year loss.
You can do a look-back cost segregation study
If you owned the property as a long-term rental for years and never cost segregated it, you do not lose that depreciation. You file Form 3115 to change your method of accounting and claim a §481(a) catch-up adjustment in the year of change. That adjustment captures the accelerated depreciation you could have taken on the short-life components but did not.
Gray area, do not overclaim: whether the catch-up components qualify for bonus depreciation depends on the property's original placed-in-service date and the bonus phase-down schedule in effect then, not the conversion year. The conversion does not reset that date. This is a determination for your cost segregation firm and CPA to make together, not something to assume.
Old suspended passive losses do not unlock at conversion
This is the nuance most people get backward. During your long-term-rental years, rental losses were passive by default under IRC §469(c)(2). If your income was too high to use the $25,000 active-participation allowance, those losses suspended and carried forward.
Converting to an STR does not free them. Suspended passive losses from the long-term years stay suspended. They are released only when you have passive income to absorb them or when you dispose of the entire interest in a fully taxable sale under IRC §469(g). A conversion is not a sale. Only the new losses generated in a qualifying STR year are nonpassive and able to offset active income.
Key takeaways
- A long-term rental can be converted to a short-term rental and qualify for the loophole. The conversion is not a taxable event.
- The conversion-year average blends any prior long-term tenant into the calculation, which can push you over 7 days. The cleanest path is to claim the loophole in the first full STR tax year.
- Depreciation shifts from a 27.5-year residential life to a 39-year nonresidential life on the building going forward.
- A look-back cost segregation study with Form 3115 and a §481(a) catch-up can recover depreciation you never took. Bonus eligibility on the catch-up depends on the original placed-in-service date, so confirm it with a professional.
- Suspended passive losses from the long-term years do not unlock at conversion. They carry forward until you have passive income or sell.
Sources
- IRC §469 (Passive Activity Losses and Credits Limited): https://www.law.cornell.edu/uscode/text/26/469
- IRC §168 (Accelerated Cost Recovery System): https://www.law.cornell.edu/uscode/text/26/168
- Treas. Reg. §1.469-1T(e)(3) (Rental activity definition and exceptions): https://www.law.cornell.edu/cfr/text/26/1.469-1T
- IRS Publication 925 (Passive Activity and At-Risk Rules): https://www.irs.gov/pub/irs-pdf/p925.pdf
- IRS Form 3115 (Application for Change in Accounting Method): https://www.irs.gov/forms-pubs/about-form-3115
Last updated: June 2026 Author: Jennifer Beadles, a real estate investor with 17+ years of experience and a multi-state portfolio who operates the Timber & Tide short-term rental in Everett, WA.
This article is for educational purposes only and is not tax or legal advice. Consult a qualified CPA familiar with real estate before implementing any strategy.
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