Every fall, someone at a trade show tells another contractor he can "write off a truck" and that contractor goes home half-excited, half-confused, and eventually does nothing because he's not sure what he heard was real. It is real. Section 179 is a legitimate IRS provision and most small contractors aren't using it as well as they could.
What Section 179 Actually Is
Normally, when you buy a piece of equipment, you depreciate it over several years. A $50,000 truck doesn't give you a $50,000 deduction in year one. It might give you $10,000 per year for five years. That's standard depreciation.
Section 179 lets you elect to deduct the full purchase price of qualifying equipment in the year you put it in service. Buy a $50,000 truck in December, use it for business, and you can potentially deduct the whole thing on this year's return instead of spreading it out. That's the simplified version.
What Qualifies
Vehicles, tools, equipment, computers, software, and certain improvements to business property. The big contractor purchases almost all qualify: service vans, compressors, diagnostic equipment, tablets for the field, even HVAC units you use as loaners.
There are limits. The 2024 limit was over $1.2 million in total deductions, which is way more than most small contractors will ever spend in a year. Vehicles have special rules, especially if they're under 6,000 pounds. Heavy trucks and SUVs get better treatment than light-duty vehicles. Your accountant knows which side of the line your truck falls on.
The Catch Nobody Mentions
You can only deduct up to your business income. If your business made $80,000 and you bought $120,000 worth of equipment, you can't create a $40,000 loss with Section 179. You can carry forward the unused deduction to future years, but you can't use it to manufacture a loss in the current year (bonus depreciation works differently, but that's another article).
Also, if you buy equipment and stop using it for business before its useful life is up, the IRS wants some of that deduction back. Don't take a Section 179 deduction on a truck you're planning to sell in six months.
How to Actually Use It
Talk to your accountant before you buy, not after. The best time to plan a Section 179 purchase is in the fall when you have a clear picture of what your taxable income looks like. If you're having a good year, buying that second van in November instead of January saves you money on this year's taxes.
If you're doing your own taxes, Form 4562 is where you report the election. Most tax software will walk you through it. But seriously, if you're buying equipment over $10,000, have a professional review it. The savings almost always pay for the advice.
The short version: Section 179 is a real tax break, it's not complicated once you understand it, and most contractors aren't fully taking advantage of it. Fix that before April rolls around again.
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Written by
Dina Good
Founder, WerkOps
Dina grew up in the trades. Her father was a contractor, then a building inspector, and the job site was her classroom long before any formal one was. She went on to own her own contracting company, which is where she first felt the pain of running a skilled trade business on bad software and worse spreadsheets. A love of data pulled her into programming, and the two worlds eventually collided into WerkOps - software built by someone who has actually been on the truck.