Section 179 expensing lets businesses deduct the entire cost of certain equipment on their federal tax return in the year of purchase. When you dispose of an asset with a section 179 expense deduction, the disposition isn't included on Form 4684, 4797, 6252, or 8824.When businesses purchase tangible property, in general, they are not allowed to deduct the full cost of the property in the year it was placed in service. Section 179 of the Internal Revenue Code is a tax incentive designed to encourage businesses to invest in equipment and other qualifying property. As a rule of thumb, assets with a depreciable life of three, five, seven, 10 or 15 years would qualify for Section 179. This item addresses how S corporations and partnerships that have a Sec. 179 recapture event should report the event to their owners. You can take Section 179 in the year you place an asset in service, whether it's new or used. The asset must simply be new to you.