Commercial buildings and improvements generally are depreciated over 39 years, which essentially means you can deduct a portion of the cost every year over the depreciation period. (Land isn’t depreciable.) But enhanced tax breaks that allow deductions to be taken more quickly are available for certain real estate investments:
Business owners may be able to see substantial tax savings faster by conducting cost segregation studies. These studies identify property components and their costs, allowing you to maximize current depreciation deductions by using shorter lives and speeding up depreciation rates available for the qualifying parts of the property.