What is the Section 179 Deduction
Most people think the Section 179 deduction is some mysterious or complicated tax code. It really isn't, as you will see below.
Essentially, Section 179 of the IRS tax code allows businesses to deduct the full purchase price of qualifying equipment and/or software purchased or financed during the tax year. That means that if you buy (or lease) a piece of qualifying equipment, you can deduct the FULL PURCHASE PRICE from your gross income. It's an incentive created by the U.S. government to encourage businesses to buy equipment and invest in themselves.
Several years ago, Section 179 was often referred to as the "SUV Tax Loophole" or the "Hummer Deduction" because many businesses have used this tax code to write-off the purchase of qualifying vehicles at the time (like SUV's and Hummers). But that particular benefit of Section 179 has been severely reduced in recent years (see 'Vehicles & Section 179' for current limits on business vehicles.)
However, despite the SUV deduction lessened, Section 179 is more beneficial to small businesses than ever. Today, Section 179 is one of the few government incentives available to small businesses, and has been included in many of the recent Stimulus Acts and Congressional Tax Bills. Although large businesses also benefit from Section 179 or Bonus Depreciation, the original target of this legislation was much needed tax relief for small businesses - and millions of small businesses are actually taking action and getting real benefits.
What's the difference between Section 179 and Bonus Depreciation?
Bonus depreciation is offered some years, and some years it isn't. Right now in 2025, it's being offered at 100%.
The most important difference is both new and used equipment qualify for the Section 179 Deduction (as long as the used equipment is "new to you"), while Bonus Depreciation has only covered new equipment only until the most recent tax law passed. In a switch from recent years, the bonus depreciation now includes used equipment.
Bonus Depreciation is useful to very large businesses spending more than the Section 179 Spending Cap (currently $2,500,000) on new capital equipment. Also, businesses with a net loss are still qualified to deduct some of the cost of new equipment and carry-forward the loss.
When applying these provisions, Section 179 is generally taken first, followed by Bonus Depreciation - unless the business had no taxable profit, because the unprofitable business is allowed to carry the loss forward to future years.