Fire Sprinkler Incentive Act - Amends the Internal Revenue Code to allow: (1) 100% expensing in a current taxable year of the cost of an automated fire sprinkler system, as defined by this Act; and (2) accelerated depreciation (i.e., a 15-year recovery period) of such an automated fire sprinkler system that is installed in a building where the floor of any occupiable story is greater than 75 feet above the lowest level of fire department vehicle access.