Section 179: How Contractors Can Write Off Equipment This Year

Section 179 of the IRS tax code lets qualifying businesses deduct the full purchase price of eligible equipment — including shipping containers and generators used for business purposes — in the year they're placed in service, rather than depreciating the cost over several years on a fixed schedule.

The practical difference is timing: normal depreciation spreads a deduction out over the equipment's useful life (sometimes 5–7+ years for this class of asset), while Section 179 lets an eligible business take the whole deduction against this year's income instead. For a profitable year where you need to offset taxable income, that timing difference is the entire appeal.

Contractors and ag operations are typical users of this deduction because both industries regularly buy tangible, business-use equipment outright — a jobsite storage container, a standby generator, a cold-storage unit for produce — rather than leasing it. Section 179 is built around exactly that kind of purchase.

In general, the deduction applies to equipment that's used more than 50% for business purposes and placed in service (meaning ready and available for its intended use, not just purchased) within the tax year you're claiming it.

Because the deduction is tied to the tax year the equipment is placed in service, a purchase made and delivered in December can typically be claimed for that year, while the same purchase delayed into January moves the deduction to the following year's return. If you're trying to offset a specific year's income, that placed-in-service date — not just the purchase date — is what your accountant will care about.

This phrase does a lot of work in the rules and it doesn't mean what people assume, so it's worth being precise about.

Placed in service generally means the equipment is ready and available for its intended use — not that you've paid for it, and not necessarily that you've started using it. A container delivered to your site and ready to store goods is generally placed in service even if you haven't loaded it yet.

The corollary is the part that catches people out: equipment that has been paid for but not delivered, or delivered but not yet usable, may not qualify for that year. A refrigerated container sitting on your pad with no power connection is arguably not ready for its intended use, which is one more reason to have the electrical work done rather than pending — see our reefer container electrical requirements guide if that applies to your purchase.

If timing is a significant part of why you're buying, work backwards from the date you need it operational, and build in delivery lead time and any site or electrical work. Cutting it fine against a year end is a risk with a real cost attached.

These two get conflated constantly, and while both accelerate deductions, they operate differently and interact in ways only your accountant can properly apply to your situation.

Section 179 is an election you make, with limits on the total amount that can be deducted and a phase-out once total equipment purchases for the year exceed a threshold. Because it's elected, you have some control over how much you claim, which matters if you'd rather spread deductions across years.

Bonus depreciation is a separate mechanism that has historically applied more automatically and without the same spending caps, though the applicable percentage has changed repeatedly through legislation.

The figures, thresholds, and percentages for both change from year to year, and I'm deliberately not quoting them here — a specific number in an article is exactly the sort of thing that ages badly and gets relied on when it shouldn't be. Your accountant will have the current figures and, more importantly, will know which mechanism serves your particular tax position.

Two conditions that come up frequently with equipment purchases of this kind.

Financing does not automatically disqualify a purchase. The general principle is that the deduction attaches to equipment placed in service, not to how it was paid for — which is why the deduction can sometimes exceed the cash actually outlaid in the first year. Whether that works in your case depends on the financing structure, and it's a question for your accountant rather than an assumption to make.

Business use generally needs to exceed 50%. Equipment used partly for personal purposes is treated proportionally, and if business use later drops below the threshold there can be recapture consequences — meaning some of the deduction gets clawed back. For a container or generator used entirely in a business this is rarely an issue, but it matters for mixed-use purchases, and it's worth being honest about at the outset rather than the point of an audit.

Whatever your accountant decides, the documentation burden falls on you, and it's much easier to assemble as you go than to reconstruct later.

Keep the itemised invoice showing what was bought and for how much. Keep evidence of the delivery date and of when the equipment became ready for use — a delivery note, a commissioning record, or a dated photograph is more useful than a memory. Keep records of any associated costs that formed part of getting it into service. And keep a note of the business purpose the equipment serves, which is straightforward at the time and surprisingly hard to reconstruct three years on.

For a multi-unit order, an itemised breakdown per unit is more useful than a single total, because it lets equipment be treated individually if that turns out to be advantageous.

Deduction limits, phase-outs, and eligibility rules change year to year and depend on your specific tax situation, total equipment spending, and business structure, so nothing here is tax advice — talk to your accountant about how Section 179 applies to your business before you buy.

We can't give tax advice, but we can make the paperwork side easy: every unit we sell comes with an itemized invoice your accountant can use to support the deduction, including a clear description and price breakdown for each item on a multi-unit order.