What would you do with extra cash flow? Cost segregation is the method of re-classifying components and improvements of your commercial building from real property to personal property. This process allows the assets to be depreciated on a 5, 7 or 15 year schedule instead of the traditional 27.5 or 39 year depreciation schedule of real property. Thus your current taxable income will be greatly reduced and your cash flow could increase by 5% – 8% of your building’s cost.