Rental Property Depreciation: How It Works & How to Calculate It

Depreciation is the single biggest tax advantage of owning rental property. It allows you to deduct the cost of your building over time — even though the property may actually be going UP in value. This creates a "paper loss" that can shelter thousands of dollars in rental income from taxes every year.

Yet most landlords either don't claim depreciation correctly or leave money on the table by not using strategies like cost segregation. This guide covers everything you need to know.

What Is Rental Property Depreciation?

Depreciation is an IRS-allowed tax deduction that lets you recover the cost of your rental property over its "useful life." The IRS considers residential rental property to have a useful life of 27.5 years.

Here's the key: you're deducting the cost of the building only — not the land. Land doesn't depreciate.

How to Calculate Depreciation

Step 1: Determine your cost basis

Your cost basis includes:

• Purchase price
• Closing costs (title insurance, attorney fees, recording fees)
• Capital improvements made before placing the property in service

Step 2: Subtract land value

The IRS doesn't let you depreciate land. Common methods to determine land value:

• Tax assessment: Use the land-to-total ratio from your property tax assessment
• Appraisal: Get a formal appraisal that breaks out land vs. building
• Comparable land sales: Look at vacant lot sales in the area

A common rule of thumb: land is typically 15-30% of total property value, depending on location. Urban areas tend toward the higher end.

Step 3: Divide by 27.5 years

For residential rental property, the IRS requires straight-line depreciation over 27.5 years using the mid-month convention.

Cost Segregation: Accelerate Your Depreciation

Cost segregation is a tax strategy that reclassifies components of your building into shorter depreciation periods — 5, 7, or 15 years instead of 27.5 years. This front-loads your tax deductions.

What qualifies for shorter depreciation?

When is cost segregation worth it?

• Properties worth $500K+ (below this, the study cost may not justify the benefit)
• New construction or major renovations
• Properties you plan to hold for 5+ years
• You have sufficient income to offset (or qualify as a real estate professional)

Cost segregation studies typically cost $5,000-$15,000 but can generate tax savings of $50,000-$200,000+ on larger properties.

Bonus Depreciation

Under current tax law, bonus depreciation allows you to deduct a large percentage of eligible asset costs in the first year. The bonus depreciation percentage has been phasing down:

Bonus depreciation applies to the assets identified in a cost segregation study (5, 7, and 15-year property). The 27.5-year building structure does not qualify for bonus depreciation.

Depreciation Recapture

Here's the catch: when you sell the property, the IRS recaptures the depreciation you claimed. Depreciation recapture is taxed at a rate of 25% (higher than the 15-20% long-term capital gains rate).

Example:

You bought a property for $300K (depreciable basis $240K). After 10 years, you've claimed $87,273 in depreciation. When you sell, the IRS taxes that $87,273 at 25% = $21,818 in recapture tax.

How to avoid depreciation recapture

• 1031 Exchange: Swap into another investment property and defer ALL taxes, including recapture
• Hold until death: Your heirs get a stepped-up basis, wiping out all depreciation recapture
• Convert to primary residence: Live in it for 2+ years before selling to use the Section 121 exclusion (partial)

Real Estate Professional Status (REPS)

Normally, rental losses (including depreciation) are passive losses and can only offset passive income. But if you qualify as a Real Estate Professional, you can use rental losses against ALL income — including W-2 wages.

Requirements for REPS:

1. Spend 750+ hours/year in real estate activities
2. Real estate is your primary profession (more time than any other job)
3. Materially participate in each rental activity (or group them under an election)

Property managers often qualify for REPS automatically, since property management IS their primary real estate activity. This makes the depreciation deduction even more valuable — you can use it to offset management fee income and other earnings.

Section 179 for Rental Property

Section 179 allows immediate expensing of certain business assets. However, it has limited application to rental real estate. Section 179 cannot be used for the building itself or its structural components for residential rental property.

Where Section 179 CAN apply to rental properties:

• Appliances (stoves, refrigerators, washers, dryers)
• Certain HVAC systems (rooftop units, non-structural)
• Fire protection and alarm systems
• Security systems

Depreciation for Common Property Types

Common Depreciation Mistakes

• Not claiming depreciation at all: The IRS will recapture depreciation whether you claimed it or not. If you don't take it, you lose the deduction but still owe recapture tax. Always claim it.
• Depreciating land: Only the building is depreciable. Always separate land value from your basis.
• Wrong placed-in-service date: Depreciation starts when the property is "placed in service" (available for rent), not when you bought it or when a tenant moves in.
• Confusing repairs vs. improvements: Repairs are deducted immediately; improvements must be capitalized and depreciated.
• Not doing cost segregation on larger properties: Leaving tens of thousands of dollars on the table.

The Bottom Line

Rental property depreciation is the most powerful tax tool available to real estate investors. At minimum, you should be claiming straight-line depreciation on every rental property. For larger portfolios, cost segregation and REPS status can create massive tax advantages.

Work with a CPA who specializes in real estate to maximize your depreciation strategy. The tax savings can significantly improve your cash-on-cash returns and help you scale your portfolio faster.