Depreciation
A reduction in the value of an improvement (building) over time due to physical deterioration, functional obsolescence, or external factors.
What Is Depreciation?
In real estate, depreciation has two distinct meanings that are both tested on the licensing exam. For appraisal purposes, depreciation is any loss in property value from any cause, categorized into three types: physical deterioration (wear and tear, deferred maintenance, aging systems — can be curable or incurable), functional obsolescence (outdated features or design flaws that reduce desirability, such as a one-bathroom home in a market that demands two, or a bedroom accessible only through another bedroom — can be curable if the cost to fix is less than the value gained, or incurable if it is not economically feasible), and external (economic) obsolescence (factors outside the property boundaries that reduce value, such as proximity to a noisy airport, a declining neighborhood, or environmental contamination — always incurable because the owner cannot control or remedy external conditions). For tax purposes, depreciation is a non-cash deduction that allows owners of income-producing property to recover the cost of improvements (the building, not the land) over their IRS-defined useful life: 27.5 years for residential rental property and 39 years for commercial (nonresidential) property, using the straight-line method (equal annual deductions). Tax depreciation applies even when the property is appreciating in market value — it is an accounting concept, not a measure of actual value decline.
Depreciation Formulas
ƒ Key Formulas
Depreciation in Practice
A rental property is purchased for $400,000 with $80,000 attributed to land and $320,000 to the building. Annual straight-line tax depreciation = $320,000 ÷ 27.5 = $11,636 per year. This non-cash deduction reduces the owner's taxable rental income by $11,636 annually. If the property generates $24,000 in net rental income, only $12,364 is taxable after the depreciation deduction. Meanwhile, for appraisal purposes, the same property might suffer $15,000 in physical deterioration (aging roof and HVAC), $10,000 in functional obsolescence (outdated kitchen layout), and $5,000 in external obsolescence (new commercial development nearby) — a total depreciation of $30,000 from its replacement cost.
Why Depreciation Matters
Depreciation is one of the most tested topics on the real estate exam because it spans both property valuation and tax law — two major exam content areas. For appraisal, understanding the three types of depreciation is essential to the Cost Approach to value, where the appraiser estimates replacement cost and then subtracts accrued depreciation. For investors, tax depreciation is one of the most powerful benefits of real estate ownership: it reduces taxable income without requiring any cash outlay, effectively creating a tax shelter. Understanding depreciation also helps explain why 1031 exchanges are so popular — they defer the recapture of accumulated depreciation deductions that would otherwise be taxed at sale.
Key Factors That Affect Depreciation
- 1.Physical deterioration is the most straightforward type. It includes normal wear and tear, deferred maintenance, and aging building systems. Curable physical deterioration (painting, replacing carpet) is economically feasible to fix. Incurable physical deterioration (foundation settling, structural aging) costs more to fix than the value it would add.
- 2.Functional obsolescence results from outdated design or features. A home with only one bathroom in a market demanding two suffers functional obsolescence. If adding a bathroom costs less than the value increase, it is curable. If the floor plan cannot accommodate a second bathroom, it is incurable.
- 3.External (economic) obsolescence is always incurable because it stems from factors outside the property's boundaries. Proximity to an airport, a declining local economy, new zoning that permits industrial use nearby, or environmental contamination on adjacent land are all examples.
- 4.Tax depreciation only applies to income-producing property — not to a primary residence. The owner must allocate the purchase price between land (not depreciable) and improvements (depreciable). The IRS may challenge allocations that assign too little value to land.
- 5.Depreciation recapture is taxed at up to 25% when the property is sold. The accumulated depreciation deductions reduce the property's tax basis, creating a larger taxable gain at sale. This is a key reason investors use 1031 exchanges to defer recapture taxes.
Common Mistakes With Depreciation
- ✗Confusing appraisal depreciation with tax depreciation. Appraisal depreciation measures actual loss of value from physical, functional, or external causes. Tax depreciation is an accounting deduction that may bear no relationship to actual market value changes.
- ✗Depreciating land. Land is never depreciated for tax purposes — only the improvements (buildings, structures) are depreciable. The total purchase price must be allocated between land and improvements.
- ✗Thinking external obsolescence can be cured. External obsolescence is always incurable because the property owner has no control over conditions outside their property boundaries. A new highway, zoning change, or environmental contamination on adjacent land cannot be 'fixed' by the owner.
- ✗Using the wrong useful life. Residential rental property = 27.5 years. Commercial (nonresidential) property = 39 years. Mixing these up is a common exam error.
- ✗Forgetting that depreciation recapture is taxed at sale. When a depreciated property is sold, the IRS taxes the accumulated depreciation deductions at up to 25% (Section 1250 recapture). This often comes as a surprise to sellers who did not plan for it.
Depreciation vs. Related Metrics
Depreciation is used within the Cost Approach to appraisal. The appraiser estimates replacement cost of improvements, then subtracts accrued depreciation (physical, functional, external) to arrive at the depreciated value of improvements. Add land value to get total property value.
A 1031 exchange defers capital gains taxes AND depreciation recapture taxes. Without an exchange, accumulated depreciation deductions are 'recaptured' and taxed at up to 25% at sale. The exchange lets investors roll forward the deferred tax liability.
Depreciation is NOT included in NOI. NOI measures operating performance before financing costs, taxes, and non-cash deductions. Tax depreciation reduces taxable income but does not affect NOI or cash flow from operations.
How Depreciation Appears on the Real Estate Exam
Common question types, tested concepts, and what to watch out for
Know the three types of appraisal depreciation and which are curable vs. incurable. External obsolescence is ALWAYS incurable. Land is NEVER depreciated for tax purposes. Residential useful life = 27.5 years; commercial = 39 years. Straight-line method is required (equal annual deductions). The exam frequently tests the distinction between appraisal depreciation (loss of value) and tax depreciation (accounting deduction).
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