The most important thing to understand about rental property depreciation is that you don’t get a choice. The IRS requires you to depreciate your rental property, and when you eventually sell, they recapture that depreciation whether you actually claimed it or not. If you skip the deduction during your years of ownership, you lose the annual tax benefit but still owe recapture tax at sale. That is the worst of both worlds.

Residential rental property depreciates over 27.5 years using the straight-line method. You divide the depreciable basis by 27.5, and you deduct that amount every year. Commercial property follows the same approach but uses a 39-year recovery period. The math itself is straightforward. What trips up most real estate investors is determining the correct depreciable basis in the first place.

Land is not depreciable. When you buy a rental property for $500,000, some of that price represents the building and some represents the land underneath it. You can only depreciate the building portion. The standard approach is to use your county assessor’s breakdown of land versus improvement value. In Fairfax County and across Northern Virginia, land values often represent a large percentage of total property value. That means your depreciable basis may be lower than you’d expect. Getting this allocation right from the start matters because it affects your deduction every single year for nearly three decades.

Depreciation begins when the property is placed in service, meaning when it’s ready and available for rent. Not when you close on the purchase and not when your first tenant moves in. If you buy a property in March and it’s rent-ready in April, depreciation starts in April. The IRS uses a mid-month convention, so you get half a month’s worth of depreciation for the month the property enters service.

Each rental property you own carries its own depreciation schedule. Capital improvements like a new roof, HVAC system, or kitchen renovation also get their own separate schedule. These improvements typically depreciate over 27.5 years for residential properties as well, starting from the date they’re placed in service. Tracking multiple schedules across multiple properties gets complicated quickly, which is why consistent bookkeeping practices matter from the beginning.

The recapture piece deserves extra attention because it catches investors off guard at sale. When you sell a rental property, the IRS taxes the depreciation you claimed (or should have claimed) at a rate of up to 25%. This is on top of any capital gains tax you owe. Investors who never bothered claiming depreciation still face this recapture tax, which is why failing to depreciate is essentially giving the IRS free money year after year.

Working with bookkeepers in Fairfax who understand rental property accounting ensures your depreciation schedules are set up correctly from day one and that every deduction the tax code allows is being captured. Over the life of an investment property, depreciation represents tens of thousands of dollars in tax savings. That is real money you do not want to leave on the table because of a setup mistake or a misunderstanding about how the rules work.