What is the Section 179 Deduction?The Section 179 IRS tax code allows businesses to deduct the full purchase price of qualifying equipment, such as commercial vehicles, that are purchased or financed during the tax year. Section 179 was created with the small business in mind, to encourage them to invest in themselves and help expand their business. The deduction limit for 2019 is $1,000,000 and the deduction is available to all small business that spend less than $3,500,000 during the tax year.