If your business is depreciating over a 30-year period the entire cost of constructing the building that houses your operation, you should consider a cost segregation study. It might allow you to accelerate depreciation deductions on certain items, thereby reducing taxes and boosting cash flow. And under current law, the potential benefits of a cost segregation study are now even greater than they were a few years ago due to enhancements to certain depreciation-related tax breaks. Fundamentals of depreciation Generally, business buildings have a 39-year depreciation period (27.5 years for residential rental properties). Usually, you depreciate a building’s structural components, including walls, windows, HVAC systems, elevators, plumbing and wiring, along with the building. Personal property — such as equipment, machinery, furniture and fixtures — is eligible for...