Depreciation is one of the most powerful “hidden” benefits of real estate investing. It’s a non-cash tax deduction that acknowledges the wear and tear on a property over time, allowing you to keep more rental income in your pocket.

Here is the breakdown of how to calculate it and what you need to know before you start.

The Ground Rules

Before grabbing a calculator, ensure your property qualifies. The IRS requires that:

• You own the property and use it to produce income.
• It has a determinable “useful life” (it wears out over time).
• You intend to hold it for more than one year.
• The clock starts when the property is “placed in service”—meaning it is ready and available for rent, even if a tenant hasn’t signed a lease yet.

Note: Land never depreciates because it doesn’t wear out. You can only depreciate the building and improvements.

How to Calculate Your Depreciation in 4 Steps

1. Identify the Purchase Price

Start with the total acquisition cost. For example, if you bought a rental home for $350,000, that is your starting point.

2. Separate Land from Building

You must carve out the value of the land. Investors typically find this ratio through property tax assessments or professional appraisals.

• Example: If your tax assessor values the land at 20% of the total price, your land value is $70,000 and your building value is $280,000.

3. Adjust Your Cost Basis

Your “basis” isn’t just the building price; you can add qualifying closing costs (like legal fees, recording fees, and survey costs) to increase your depreciable amount, which ultimately leads to a larger tax break.

4. Apply the 27.5-Year Rule

The IRS mandates a recovery period of 27.5 years for residential rental property. To find your annual deduction, use this formula:

Annual Depreciation= Cost Basis / 27.5 

Using our previous example of a $280,000 building value

280,000 / 27.5 =$10,181.82 per year

The “Catch”: Depreciation Recapture

While depreciation saves you money now, the IRS will want a portion of it back when you sell. This is called Depreciation Recapture. You may be taxed up to 25% on the total depreciation you claimed (or could have claimed) during your ownership.

Catch-Up Depreciation: If you missed claiming depreciation in previous years, you don’t necessarily need to amend every old return. You can often use IRS Form 3115 (Change in Accounting Method) to claim all that “missed” depreciation in a single year.

Remember to keep every receipt for renovations. When you eventually sell, a higher adjusted basis means a lower capital gains tax bill!