Depreciation Is Your Largest Non-Cash Deduction
For rental property investors, depreciation is the single most valuable tax benefit in the code. It allows you to deduct the cost of your building over time, reducing your taxable rental income without spending an additional dollar. While you collect rent and your property appreciates in value, the IRS lets you claim a paper loss that offsets your income.
But not all depreciation is created equal. The recovery period assigned to your property, whether 27.5 years or 39 years, determines how large your annual deduction is. Getting this classification right is essential.
How Depreciation Works Under IRC Sec. 168
The Modified Accelerated Cost Recovery System (MACRS), codified under IRC Sec. 168, is the depreciation method used for virtually all rental property. Under MACRS, you depreciate the cost of the building (not the land) over a prescribed recovery period using the straight-line method and the mid-month convention.
The depreciable basis is the purchase price minus the value allocated to land, plus capitalized closing costs and improvements. For example, if you purchase a rental property for $500,000 and the land is valued at $100,000, your depreciable basis is $400,000.
27.5-Year Residential Rental Property
Under IRC Sec. 168(c), residential rental property is depreciated over 27.5 years. A property qualifies as residential rental if 80% or more of its gross rental income comes from dwelling units. This includes single-family homes, duplexes, apartment buildings, and condominiums used as long-term rentals.
Using the example above, a $400,000 depreciable basis spread over 27.5 years produces an annual depreciation deduction of approximately $14,545. At a 37% marginal tax rate, that is $5,382 in tax savings every year from a non-cash deduction.
The mid-month convention under IRC Sec. 168(d)(2) means you claim a partial year in the year of acquisition. Purchase in January and you get 11.5 months of depreciation. Purchase in December and you get only half a month.
39-Year Nonresidential Real Property
Under IRC Sec. 168(c), nonresidential real property is depreciated over 39 years. Any property that does not meet the 80% residential rental income test is classified as nonresidential. This includes office buildings, retail spaces, warehouses, and many short-term rental properties.
The same $400,000 basis spread over 39 years produces an annual deduction of approximately $10,256. At a 37% rate, that is $3,795 per year. Compared to the 27.5-year schedule, you lose nearly $1,600 annually on a single property. Over the life of the investment, that gap compounds to tens of thousands of dollars.
The Short-Term Rental Classification Problem
This is where many investors get tripped up. Short-term rentals on Airbnb and VRBO often do not qualify as "residential rental property" for depreciation purposes, even though they are houses and apartments.
Under Treasury Regulation Sec. 1.168(e)-1(a), a property is residential rental only if 80% or more of its gross rental income is from dwelling units. The IRS has taken the position that units rented on a transient basis (stays of 30 days or fewer) are not "dwelling units" for this test. If your STR is rented exclusively on short-term stays, it fails the 80% test and must be depreciated over 39 years.
Many STR investors are incorrectly depreciating their properties over 27.5 years. If the IRS examines your return and reclassifies the property, you face depreciation recapture adjustments, penalties, and interest.
The Silver Lining for STR Owners
While the longer recovery period is a disadvantage, STR properties classified as nonresidential have a potential upside under IRC Sec. 469. An STR with an average rental period of 7 days or fewer is not treated as a "rental activity" under Temp. Reg. Sec. 1.469-1T(e)(3)(ii)(A). If the owner materially participates, the losses can offset active income. This is the foundation of the "STR loophole."
Bonus Depreciation and Cost Segregation
Under IRC Sec. 168(k), bonus depreciation allows you to deduct a large percentage of qualifying assets in the year placed in service. The building structure itself does not qualify for bonus depreciation, but individual components identified through a cost segregation study do.
A cost segregation study reclassifies building components into shorter recovery periods: 5-year property (appliances, carpeting, fixtures), 7-year property (furniture, equipment), and 15-year property (parking lots, landscaping, fencing). These shorter-lived assets are eligible for bonus depreciation, allowing first-year deductions that can reach 25% to 40% of the total purchase price. Whether your building is on a 27.5-year or 39-year schedule, cost segregation accelerates the depreciation of the component parts.
Depreciation Recapture: The Cost of the Benefit
When you sell a rental property, you must "recapture" the depreciation claimed. Under IRC Sec. 1250, unrecaptured Section 1250 gain is taxed at a maximum rate of 25%, higher than the 15% or 20% long-term capital gains rate on appreciation.
This recapture applies regardless of recovery period. The only ways to defer or avoid it are through a 1031 exchange (deferral) or holding the property until death, at which point heirs receive a stepped-up basis under IRC Sec. 1014.
Getting Your Classification Right from Day One
The depreciation recovery period is determined when the property is placed in service and cannot be changed retroactively without filing an accounting method change under IRC Sec. 446. If you have been depreciating incorrectly, the IRS allows automatic changes under Revenue Procedure 2015-13 (as updated) by filing Form 3115 and computing a Section 481(a) adjustment.
AE Tax Advisors specializes in depreciation strategy for rental property investors. Whether you own long-term rentals, short-term rentals, or a mix of both, we ensure every property is classified correctly and every available deduction is captured. Call us at (631) 614-5762 or email team@aetaxadvisors.com to schedule a depreciation review of your portfolio.