Is your business depreciating over 30 years the entire cost of constructing the building that houses your enterprise? If so, you should consider a cost segregation study. It may allow you to accelerate depreciation deductions on certain items, thereby reducing taxes and boosting cash flow. Depreciation basics Business buildings generally have a 39-year depreciation period (27.5 years for residential rental properties). In most cases, a business depreciates a building’s structural components, including walls, windows, HVAC systems, elevators, plumbing and wiring, along with the building. Personal property — including equipment, machinery, furniture and fixtures — is eligible for accelerated depreciation, usually over five or seven years. And land improvements, such as fences, outdoor lighting and parking lots, are depreciable over 15 years. Frequently, businesses allocate all or most of...