To amend the Internal Revenue Code of 1986 to modify and make permanent bonus depreciation.

[AI summary unavailable — showing source text] This bill amends the Internal Revenue Code to make permanent the additional 50% depreciation allowance, known as bonus depreciation, for depreciable business property (i.e., qualified property) placed in service after December 31, 2014. The term "qualified property" is modified to include qualified improvement property, in lieu of qualified leasehold improvement property, which is defined as any improvement to an interior portion of a building that is nonresidential real property if such improvement is placed in service after the date such building was first placed in service. The bill also increases by $8,000 (with an annual inflation adjustment after 2015) the maximum allowable depreciation deduction for a passenger automobile (i.e., any 4-wheeled vehicle that is manufactured primarily for use on public streets, roads, and highways and is rated at 6,000 pounds unloaded gross vehicle weight or less). Also made permanent, for taxable years ending after December 31, 2014, is the election to increase the alternative minium tax credit limitation in lieu of bonus depreciation. The bill allows an additional depreciation allowance for any specified plant that is planted, or gra…