Accumulated depreciation is the total amount of depreciation expense that has been recorded against a commercial property since it was placed in service. It lives on the balance sheet as a contra-asset that reduces the property's original cost down to its current book value.
Book Value = Original Cost − Accumulated DepreciationIf I buy a Nashville retail building for $1,000,000 and I've taken $200,000 of depreciation over five years, my accumulated depreciation is $200,000 and the book value is $800,000.
Tyler's take
Depreciation is one of the biggest reasons I tell new investors to look at commercial real estate instead of stocks. But most people mix up depreciation (the annual expense) with accumulated depreciation (the running total), and that confusion costs them when they go to sell.
Here's how I explain it to CRE Accelerator members: depreciation is the slice you take each year, accumulated depreciation is the whole pie you've eaten so far. The IRS lets you deduct a portion of the building's value every year as if it were wearing out, even though in Nashville the actual value usually goes up. That annual deduction shelters rental income from taxes. But every dollar you deduct stacks up on the balance sheet as accumulated depreciation, and when you sell, the IRS wants a piece of it back through depreciation recapture (taxed at up to 25%).
The move isn't to avoid depreciation, it's to plan for what happens to accumulated depreciation at exit. Pair it with a 1031 exchange (defers recapture) or a cost segregation study (front-loads the deduction). If you're holding long-term in Nashville, accumulated depreciation is basically a loan from the IRS you plan to roll forever.
How it works
Start with the depreciable basis. Purchase price plus closing costs and improvements, minus land value. Land doesn't depreciate.
Apply the IRS useful life. 39 years for commercial, 27.5 for residential rental.
Add each year's depreciation to the running total. That's accumulated depreciation.
Subtract from original cost to get book value.
Worked example: 10,000 SF Nashville flex building, $1,500,000 purchase. Land $300,000, depreciable basis $1,200,000. Annual depreciation = $1,200,000 / 39 = $30,769. After 5 years, accumulated depreciation = $153,846. Book value = $1,346,154. Meanwhile, actual market value might be $2.1M. Book and market value have almost nothing to do with each other. That gap is the point.
Where it lives on the financials
Accumulated depreciation is a contra-asset on the balance sheet. It sits under the property asset line with a negative balance, reducing reported value without touching the original cost. Balance sheet shows both lines: original cost, accumulated depreciation, net book value.
Common mistakes
Depreciating the land. Land never depreciates. Split it out at acquisition.
Forgetting about recapture. Build it into your exit model from day one.
Mixing up book value and market value. The IRS cares about book value. Buyers care about market value.
Not tracking improvements separately. A new roof or HVAC gets its own schedule.
FAQs
Is accumulated depreciation an asset or a liability? Neither. It's a contra-asset that reduces the value of a related asset.
What happens to accumulated depreciation when I sell? The IRS recaptures it. The portion of gain attributable to depreciation is taxed at up to 25%.
Can I reset accumulated depreciation through a 1031 exchange? No. It carries over. You're deferring, not erasing.
Does a cost segregation study change accumulated depreciation? Yes, it accelerates it by reclassifying portions of the building into shorter-life categories.
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