Key Takeaways
- Depreciation is a mandatory non-cash deduction—the IRS recaptures it at sale whether or not you claim it.
- Residential buildings: 27.5 years; commercial: 39 years; land improvements: 15 years; personal property: 5 or 7 years.
- Only the building portion is depreciable—land is excluded and typically represents 15-25% of purchase price.
- Cost segregation reclassifies 25-35% of building components into shorter-lived categories, accelerating deductions.
Depreciation is the most powerful non-cash tax deduction available to real estate investors. It allows you to deduct the cost of a building over its useful life—generating real tax savings on income you actually received in cash. This lesson introduces the depreciation framework, recovery periods, and the cost segregation strategy that accelerates depreciation into the early years of ownership. This is educational content, not tax advice.
What Is Depreciation?
Depreciation is an annual tax deduction that represents the theoretical decline in value of a building over time due to wear and use. The IRS allows property owners to deduct a portion of the building's cost each year, even though the property may actually be appreciating in market value. This creates the unique real estate phenomenon of positive cash flow combined with a tax loss. Only the building (improvement) portion of the property is depreciable—land is not depreciable because it does not wear out. A property purchased for $300,000 with an 80/20 building-to-land ratio has a depreciable basis of $240,000. The land value ($60,000) is never depreciated. Depreciation is not optional—the IRS requires it and will impose recapture tax at sale on depreciation "allowed or allowable," whether or not the deduction was actually claimed.
Recovery Periods and Methods
The IRS assigns specific recovery periods (useful lives) to different property types. Residential rental property: 27.5 years using the straight-line method. Commercial (nonresidential) property: 39 years using the straight-line method. Land improvements (sidewalks, parking lots, landscaping): 15 years. Personal property within a building (appliances, carpeting, cabinetry): 5 or 7 years. Straight-line depreciation divides the depreciable basis equally across the recovery period. A $240,000 residential building depreciates at $240,000 / 27.5 = $8,727 per year. A $390,000 commercial building depreciates at $390,000 / 39 = $10,000 per year. The first and last years of depreciation are prorated based on the "mid-month convention"—the IRS assumes you placed the property in service at the midpoint of the month of acquisition.
| Property Component | Recovery Period | Method | Example Annual Deduction |
|---|---|---|---|
| Residential Building | 27.5 years | Straight-line | $8,727/yr on $240K basis |
| Commercial Building | 39 years | Straight-line | $10,000/yr on $390K basis |
| Land Improvements | 15 years | Straight-line or accelerated | $6,667/yr on $100K basis |
| Personal Property (5-yr) | 5 years | Accelerated (MACRS) | Varies by year; front-loaded |
| Personal Property (7-yr) | 7 years | Accelerated (MACRS) | Varies by year; front-loaded |
| Land | Not depreciable | N/A | $0 |
IRS depreciation recovery periods for real estate components
Introduction to Cost Segregation
Cost segregation is an engineering-based study that reclassifies components of a building from the standard 27.5 or 39-year recovery period into shorter-lived categories (5, 7, or 15 years). Instead of depreciating an entire $2M apartment building over 27.5 years ($72,727/year), a cost segregation study might identify that 25-35% of the building consists of components with shorter lives: cabinetry and countertops (7-year), appliances (5-year), site improvements like parking lots and landscaping (15-year), and electrical systems serving specific equipment (5-7 year). Reclassifying these components accelerates depreciation into the early years of ownership, creating larger deductions when they are most valuable. Cost segregation is the single most impactful tax planning strategy for real estate investors with properties valued above $500,000.
Key Takeaways
- ✓Depreciation is a mandatory non-cash deduction—the IRS recaptures it at sale whether or not you claim it.
- ✓Residential buildings: 27.5 years; commercial: 39 years; land improvements: 15 years; personal property: 5 or 7 years.
- ✓Only the building portion is depreciable—land is excluded and typically represents 15-25% of purchase price.
- ✓Cost segregation reclassifies 25-35% of building components into shorter-lived categories, accelerating deductions.
Sources
Common Mistakes to Avoid
Depreciating the land value along with the building
Consequence: Land is not depreciable; including it inflates the depreciation deduction, which the IRS will disallow in an audit with back taxes and penalties
Correction: Allocate the purchase price between land and building using the property tax assessment ratio, an appraisal, or a reasonable allocation method; document the basis for the allocation
Failing to claim depreciation on a rental property because the investor wants to "save it" for later
Consequence: The IRS requires "allowed or allowable" depreciation—unclaimed depreciation still reduces the property's basis, creating a larger gain on sale without any corresponding tax benefit during ownership
Correction: Claim depreciation every year the property is in service as a rental; the deduction is mandatory, not optional, under the "allowed or allowable" rule
Test Your Knowledge
1.What is the standard depreciation recovery period for residential rental property?
2.What does a cost segregation study accomplish?
3.Which component of a property purchase is NOT depreciable?