Repairs to tangible property, such as buildings, machinery, equipment or vehicles, can provide businesses a valuable current tax deduction — as long as the so-called repairs weren’t actually “improvements.” The costs of incidental repairs and maintenance can be immediately expensed and deducted on the current year’s income tax return. But costs incurred to improve tangible property must be depreciated over a period of years. So the size of your 2017 deduction depends on whether the expense was a repair or an improvement. Betterment, restoration or adaptation In general, a cost that results in an improvement to a building structure or any of its building systems (for example, the plumbing or electrical system) or to other tangible property must be depreciated. An improvement occurs if there was a betterment,...