Converting a Short-Term Rental to a Long-Term Rental: What Happens to Your Depreciation
A Common Move With Uncommon Tax Consequences
Owners convert short-term rentals to long-term rentals constantly. A city tightens its ordinance, occupancy softens, the operational burden wears thin, or a good tenant appears. The operational decision is usually straightforward.
The tax consequences are not. A conversion changes the property's recovery period, changes how losses are characterized under the passive activity rules, and may trigger recapture of losses you already took.
None of this makes conversion a bad idea. It does mean the switch should be timed deliberately rather than discovered on the return.
The Recovery Period Actually Changes
Residential rental property under Section 168(e)(2)(A) is defined as a building where 80 percent or more of gross rental income is from dwelling units, and it recovers over 27.5 years. A unit used on a transient basis, where the average stay is short enough that it functions like lodging, is generally treated as nonresidential real property at 39 years.
So a short-term rental typically depreciates the structure over 39 years, and the same property under annual leases depreciates over 27.5 years.
The 80 percent test is applied annually. In the year of conversion, the classification depends on the actual income mix for that year, which means a mid-year conversion produces a fact question rather than a clean answer. Converting effective January 1 avoids it entirely.
How the Change Is Implemented
A change in the use of property is addressed in Regulation 1.168(i)-4. Where the change results in a different recovery period or method, depreciation is computed going forward using the adjusted basis at the beginning of the year of change and the new applicable recovery period.
It is not a change in accounting method requiring Form 3115, and it does not require recomputing prior years. You do not amend anything. Depreciation simply continues on the remaining basis under the new schedule.
Your 5-year, 7-year, and 15-year property from the cost segregation study is unaffected. Those classifications were made based on the nature of the assets, not the rental term, and they continue on their existing schedules.
The Passive Activity Consequence Is the Big One
This is where conversion actually costs money. A short-term rental with an average stay of seven days or less is outside the definition of a rental activity, so a materially participating owner has non-passive losses.
A long-term rental is a rental activity by definition, and it is passive per se under Section 469(c)(2) regardless of hours worked, unless the owner qualifies as a real estate professional.
So an owner who was offsetting W-2 income with rental losses stops being able to do so on conversion. Future losses suspend. If the cost segregation deduction has already been fully absorbed, this may not matter. If a portion remains, the timing of conversion matters a great deal.
What Happens to Losses You Already Claimed
Losses properly claimed as non-passive in prior years are not recaptured or reversed by a later conversion. The characterization is determined year by year on that year's facts.
There is an exception worth knowing. Section 469(f) contains former passive activity rules, and Regulation 1.469-2(f) contains recharacterization provisions that can convert income from a formerly passive activity. These are more likely to affect the treatment of future income than to claw back prior deductions, but they are why the analysis should not be done casually.
Suspended passive losses from the long-term rental period remain suspended, carrying forward until you have passive income or dispose of the entire interest in a fully taxable transaction. AE Tax Advisors covers the treatment in their comparison of STR and LTR tax treatment.
Timing the Conversion
If a large cost segregation deduction remains unabsorbed, finishing the absorption in a short-term rental year is generally worth more than converting early. That may mean holding the nightly model one additional year.
If the deduction is exhausted and the property is now generating positive taxable income, conversion is less costly and the operational benefits dominate.
Converting effective the first day of a tax year avoids the mixed-use classification question entirely and gives a clean record. Converting mid-year is workable but requires documenting the income mix to support the 80 percent test.
If You Never Ran a Study During the Short-Term Period
An owner who operated a short-term rental for several years without a cost segregation study, and now plans to convert, is in a specific and time-sensitive position.
A Form 3115 look-back can capture all the missed depreciation as a Section 481(a) adjustment in the current year. Filed in a year where the property is still short-term and the owner still materially participates, that catch-up is non-passive and can offset ordinary income.
Filed a year later, after conversion, the same adjustment is a passive loss that suspends. The economics of that one-year difference can run into six figures, and it is one of the clearest examples of why sequencing matters more than optimization.