Section 179 Deduction 2026: A Complete Guide to Equipment Tax Write-Offs

If you’ve bought equipment, vehicles, or software for your business this year, you’ve probably heard some version of “you can just write it all off.” That’s often true, but it glosses over a decision that actually matters: how you write it off. Section 179 and bonus depreciation can both get you to 100% first-year expensing at the federal level, and it’s tempting to treat them as interchangeable. They aren’t, and the gap between them shows up most in thin-profit years and growth-stage businesses financing large purchases, plus state handling can differ from federal as well.

This post is the complete mechanics reference for Section 179 heading into the 2026 tax year: what qualifies, what changed under the One Big Beautiful Bill Act (OBBBA), and how it actually compares to bonus depreciation once you get past the “it’s all 100% anyway” headline.

What Section 179 Actually Does

Section 179 of the Internal Revenue Code lets a business deduct the full cost of qualifying property in the year it’s placed in service, instead of depreciating it gradually over several years. Rather than writing off a $50,000 piece of equipment a little at a time over five or seven years, you take the entire $50,000 as a deduction against this year’s business income.

The deduction is elective and asset-specific. You choose which qualifying purchases to expense under Section 179, up to the annual dollar limit, and let anything you don’t elect follow regular depreciation (or bonus depreciation) instead. That flexibility, choosing exactly which assets to expense and which to spread out, is one of the underappreciated features of the provision, and it’s part of what separates Section 179 from bonus depreciation, which we’ll get to below.

The OBBBA change: For tax years beginning after December 31, 2024, OBBBA roughly doubled the Section 179 deduction limit to $2.5 million, up from the $1.25 million limit that had been in place under prior law (as adjusted for inflation). The phase-out threshold, the point at which total qualifying purchases start reducing the available deduction, was also increased substantially. Both figures are indexed for inflation going forward, so confirm the exact current-year numbers before finalizing a purchase decision late in any given year.

For most small businesses, a $2.5 million annual limit is well beyond what a normal year of equipment purchases will ever approach. The practical effect of the increase is less about hitting the ceiling and more about certainty. Congress made the higher limit and full bonus depreciation permanent features of the tax code rather than provisions set to shrink or expire, which matters when you’re making multi-year capital planning decisions.

What Property Qualifies for Section 179

Section 179 covers a broad range of tangible business property, generally:

• Machinery and equipment used in your trade or business
• Office furniture and fixtures
• Computers, printers, and other business technology
• Off-the-shelf computer software (software you buy and use as-is, not custom-developed software)
• Certain business vehicles (with important limits, covered below)
• Qualified improvement property and certain other improvements to nonresidential real property (such as roofs, HVAC, fire protection, and security systems)

Two requirements apply across the board. First, the property must be used more than 50% for business purposes. Second, it has to be placed in service, meaning ready and available for use in your business, not just purchased or sitting in a warehouse, during the tax year you’re claiming the deduction.

Property that generally does not qualify includes land, buildings used as residential rental property, and property acquired from certain related parties. Real property improvements that qualify are a narrower category than the equipment and personal property side of the deduction, so if you’re planning a building improvement rather than an equipment purchase, that’s worth confirming separately.

The De Minimis Safe Harbor: An Even Simpler Option for Small Purchases

Not every purchase needs to go through the Section 179 or bonus depreciation analysis at all. For routine, lower-dollar purchases, there’s a simpler tool: the de minimis safe harbor election under Treas. Reg. §1.263(a)-1(f).

Under this election, a business can deduct the cost of qualifying tangible property outright, as a routine expense, rather than capitalizing and depreciating it, as long as the amount falls under a set threshold. That threshold is $5,000 per item or per invoice if you have an applicable financial statement, generally an audited financial statement, which most small businesses don’t have, or $2,500 per item or per invoice if you don’t. When an invoice lists several items separately, the threshold generally applies item by item rather than to the invoice total, so five $800 pieces of equipment on one itemized invoice can each qualify even though the invoice adds up to $4,000.

This isn’t automatic. It requires a business accounting policy in place at the start of the tax year treating amounts under the threshold as expenses for book purposes, plus an annual election attached to your tax return for the year you’re using it. Once that’s in place, it’s genuinely simpler than Section 179 for small purchases: no asset-by-asset election, no depreciation schedule to maintain, and no business-use recapture risk to track down the road.

A new laptop, a set of office chairs, a handful of small tools, these are exactly the purchases where the de minimis safe harbor often makes more sense than reaching for Section 179. Section 179 and bonus depreciation earn their keep on the larger purchases, the equipment and vehicles running into the thousands or tens of thousands of dollars, where the de minimis threshold doesn’t reach.

Vehicles: Where Section 179 Gets More Complicated

Vehicles are the single most common source of confusion with Section 179, because the rules vary significantly depending on the type and weight of the vehicle.

Heavy vehicles over 14,000 pounds gross vehicle weight rating (GVWR): These are generally eligible for full Section 179 expensing without a special vehicle cap, subject to the overall Section 179 limit and business-use requirements. This category covers larger work trucks and specialized equipment vehicles.

Heavy SUVs between 6,000 and 14,000 pounds GVWR: This is the category that generates the most planning interest, and also the most confusion. Congress has long been wary of business owners buying large SUVs, which often have substantial personal utility, and expensing the entire purchase price. As a result, there’s a separate, much lower dollar cap on the Section 179 deduction for SUVs in this weight class. That cap is indexed for inflation and adjusts annually: it’s $32,000 for 2026, up from $31,300 in 2025. Any remaining cost above the SUV cap can generally still be depreciated using regular or bonus depreciation, just not expensed immediately under Section 179.

Vehicles under 6,000 pounds GVWR: These fall under a different set of restrictions entirely, the “luxury auto” depreciation limits under IRC §280F, which cap total depreciation deductions (including Section 179 and bonus depreciation combined) at a relatively modest annual amount, also indexed for inflation. Most passenger cars and smaller SUVs and trucks fall into this category. For a vehicle placed in service in 2026, the federal caps break down by year, and this is where the two-period wrinkle for 2026 specifically matters:

That first-year gap, $20,300 versus $12,300, is the effect of bonus depreciation being available. Beyond year one, the annual cap is the same either way, since the accelerated deduction is already baked into that first-year number.

The practical lesson: before you assume a vehicle purchase gets you a full write-off, check its GVWR (usually on a sticker inside the driver’s door) and confirm which category it falls into. The difference between a vehicle at 5,900 pounds and one at 6,100 pounds can be the difference between a few thousand dollars of first-year deduction and the full purchase price.

The Phase-Out Threshold

Section 179 isn’t unlimited. Once a business places more than a certain amount of qualifying property in service during the year, the $2.5 million deduction limit starts phasing out dollar-for-dollar.

This threshold exists to keep Section 179 targeted at small and mid-sized businesses rather than large corporations with enormous annual capital budgets. For the overwhelming majority of small business owners, this phase-out is a non-issue; you’d need several million dollars of equipment purchases in a single year to even begin approaching it. But if you’re in a capital-intensive industry, construction, manufacturing, trucking, or you’re making an unusually large one-time purchase, you’ll want to have your total qualifying purchases for the year in view before you assume the full deduction is available.

Section 179 vs. Bonus Depreciation

Here’s where the real planning decision lives. Under OBBBA, 100% bonus depreciation was made a permanent feature of the tax code for qualifying property acquired and placed in service after January 19, 2025, reversing what had been a scheduled phase-down toward zero. That means, in a lot of cases, you can get to the same place, a full first-year federal deduction, using either method. So why does the choice matter?

Section 179 has a taxable income limitation. Bonus depreciation doesn’t. Your Section 179 deduction for the year cannot exceed your net taxable income from the active conduct of your trade or business. It can reduce your business income to zero, but it cannot create or increase a loss. Bonus depreciation has no such restriction. It can push your business into a net operating loss, which then carries forward (or in limited cases, back) to offset income in other years. If you’re in a thin-margin year, a startup phase, or you’ve made a large capital investment that genuinely exceeds this year’s profit, bonus depreciation gets you the deduction where Section 179 would simply stop working and push the excess to next year instead.

Section 179 has a phase-out cap. Bonus depreciation doesn’t. As covered above, Section 179 disappears once total qualifying purchases for the year cross the phase-out threshold. There’s no equivalent ceiling on bonus depreciation. A business making an exceptionally large capital investment in a single year may find that bonus depreciation is the only path to full first-year expensing once Section 179 has phased out.

Section 179 is elective, asset by asset. Bonus depreciation applies by default, at the class level. This is a genuinely useful planning tool that gets overlooked. Because you choose exactly which assets to expense under Section 179, up to your taxable income limit, you can dial in precisely how much deduction you want to take this year, expense just enough assets to bring taxable income down to a target level (useful for managing the Qualified Business Income deduction, avoiding pushing yourself into a higher bracket unnecessarily, or preserving basis for a future year), and let the rest ride on regular depreciation schedules. Bonus depreciation, by contrast, applies automatically to an entire class of qualifying property unless you formally elect out of it for that class. It’s a blunter instrument by design.

Section 179 has a specific recapture trigger tied to business use dropping below 50%. Bonus depreciation is generally more exposed if you want to preserve future flexibility. More on recapture below, but the short version is that Section 179 carries an ongoing obligation to monitor how an asset is actually used in later years, not just how it started out.

For a lot of small business owners with straightforward, profitable years and modest equipment budgets, the federal answer genuinely doesn’t matter much, either method gets you to full expensing. The differences show up at the margins: thin-profit years, unusually large purchases, or situations where you want granular control over how much to deduct. And, as the next section covers, if you’re filing in Minnesota, the federal answer is only half the analysis.

Minnesota’s Wrinkle: Why the “It Doesn’t Matter” Instinct Is Wrong Here

This is the part of the analysis that federal-only guidance misses entirely, and it’s the reason the Section 179 versus bonus depreciation choice deserves real attention for Minnesota business owners specifically.

Minnesota does not conform to full federal bonus depreciation. When you claim bonus depreciation on your federal return, Minnesota requires you to add back 80% of the bonus depreciation deduction claimed in the year the asset is placed in service. That addback is codified in Minn. Stat. § 290.0131, subd. 9. In practical terms, only 20% of your federal bonus depreciation deduction reduces your Minnesota taxable income in year one. Then, in each of the following five tax years, you get to subtract back one-fifth of the amount you originally added back, recovering the rest of the deduction gradually. The math works out so that you eventually recover the full deduction, but instead of landing entirely in year one, it’s spread across six tax years.

Minnesota now conforms to the full federal Section 179 limit. This is the change that makes the comparison worth revisiting. Minnesota’s Section 179 conformity used to be capped well below the federal limit, at $1 million, which meant Minnesota businesses often faced their own addback-and-recover mechanic for Section 179 purchases above the state cap. Minnesota has since updated its conformity to match the full federal $2.5 million limit under OBBBA. That means, for the vast majority of small businesses, a Section 179 election doesn’t trigger any Minnesota addback at all. What you deduct federally under Section 179, you also deduct on your Minnesota return, in full, in the same year.

Let’s make this concrete. Say a Minnesota-based manufacturing shop, run by an owner named Renata, buys $200,000 of production equipment in 2026 and places it in service before year-end.

If Renata elects 100% bonus depreciation: Federally, she deducts the full $200,000 in 2026. On her Minnesota return, she has to add back 80% of that, $160,000, meaning only $40,000 reduces her Minnesota taxable income this year. Over each of the following five years, she subtracts back one-fifth of the $160,000 addback, $32,000 per year, until the full amount is recovered by year six.

If Renata instead elects Section 179 for the same $200,000 purchase: Because the purchase falls well within Minnesota’s now-conforming $2.5 million cap, she deducts the full $200,000 on both her federal and Minnesota returns in 2026.

Essentially, Section 179 front-loads the entire deduction in year one for Minnesota, the same as federal, while 100% bonus depreciation ends up taking portions of it over six years instead.

Minnesota’s conformity position is set by state legislation, and state conformity to federal tax law changes periodically, sometimes retroactively, sometimes with a lag. Before finalizing a purchase or an election, it’s worth confirming the state’s current position directly through the Minnesota Department of Revenue’s guidance on bonus depreciation and Section 179 expensing, or with a tax professional familiar with current-year Minnesota conformity. If you’re in a different state, you will have different rules, and it’s worth checking with your state agency on your local rules.

Carryforward: What Happens to Unused Section 179

If the taxable income limitation caps how much Section 179 you can actually use in a given year, don’t worry, the unused portion isn’t lost. Any Section 179 deduction you’re unable to use because it would exceed your business’s taxable income carries forward indefinitely to future tax years, where it can be used once you have sufficient taxable income to absorb it. This is one of the more forgiving aspects of the provision. A slow year doesn’t waste the deduction; it just delays when you get to use it.

Placed-in-Service Deadline: December 31 Is a Hard Line

Section 179 (and bonus depreciation, for that matter) requires the asset to be placed in service by the last day of your tax year, December 31 for most small businesses. Placed in service means the asset is ready and available for its intended business use, not merely ordered, paid for, or delivered.

This trips up business owners every year around the holidays. Ordering a piece of equipment on December 28th does you no good for the current tax year if it doesn’t arrive and get installed until January. If you’re planning a year-end equipment purchase specifically for the deduction, build in enough lead time for delivery, installation, and any setup required before the asset is actually usable in your business. A signed purchase order or a deposit isn’t enough. The asset has to be in service.

Financing Doesn’t Disqualify You

A common misconception is that you need to pay cash, or pay off the purchase in full, to claim Section 179. That’s not the case. What matters is that the asset is placed in service and used for business, not how you paid for it. You can finance the purchase entirely, put a fraction down and carry a loan for the balance, or use a lease structured as a financed purchase, and still claim the full Section 179 deduction in the year the asset goes into service, as long as it otherwise qualifies.

This creates a genuinely useful cash flow opportunity: finance a piece of equipment with a small down payment, and deduct the full purchase price against this year’s income while paying for the equipment gradually over the life of the loan. The deduction and the cash outlay don’t have to happen on the same timeline.

Recapture Risk: What Can Undo the Deduction Later

Section 179 (and, to a similar extent, bonus-depreciated property) comes with an ongoing condition attached, not just a one-time election.

Disposition recapture. If you sell or dispose of Section 179 property, the gain attributable to the deduction you previously claimed is generally recaptured as ordinary income, rather than being taxed at more favorable capital gains rates, to the extent of the depreciation you claimed. This isn’t unique to Section 179, it mirrors how depreciation recapture works generally, but remember - just because you’re getting a tax break now doesn’t mean that tax break stays forever.

The 50% business-use trigger. This one catches people off guard because it isn’t tied to selling the asset at all. If business use of a Section 179 asset drops to 50% or below in any year after you placed it in service, before the end of its normal depreciation period, you’re required to recapture a portion of the deduction as income in the year the drop occurs. The recapture amount is generally the excess of the Section 179 deduction you originally claimed over what you would have been allowed under regular depreciation for the years you’ve owned it. This applies most commonly to vehicles and other mixed-use property, where business-use percentage can shift year to year based on how the asset is actually used, not how it was used when you bought it.

The practical takeaway: keep contemporaneous records of business-use percentage for any asset where personal use is even a possibility, particularly vehicles, and don’t treat the Section 179 election as a one-time decision that’s finished once you file the return.

What to Do Before Year-End

• Inventory planned equipment purchases now, including expected delivery and installation dates, so you know realistically what will actually be placed in service by December 31.
• For smaller purchases, check the de minimis safe harbor before reaching for Section 179. If a purchase falls under the $2,500 (or $5,000 with an applicable financial statement) per-item or per-invoice threshold, it may be simpler to just expense it directly.
• Know the current-year vehicle caps before finalizing a purchase: $32,000 for heavy SUVs, and the tiered luxury auto limits above for lighter vehicles. These adjust annually, so re-check them each year rather than assuming last year’s figures still apply.
• Estimate your taxable income for the year before deciding how much Section 179 to elect, since the deduction can’t create or increase a business loss.
• If you’re in Minnesota, run both scenarios, Section 179 versus bonus depreciation, before assuming the federal answer settles the question. For most straightforward equipment purchases under the state’s conforming limit, Section 179 will produce a cleaner, faster state tax result.
• Track business-use percentage on vehicles and other mixed-use assets going forward, not just in the year you bought them.

This post covers the mechanics of Section 179 on its own. My companion post, Year-End Tax Planning for Business Owners, publishing later this month, looks at how equipment purchase timing fits into the broader year-end planning picture alongside retirement contributions, entity elections, and other moves business owners are weighing before December 31.

The Bottom Line

Section 179 became more generous under OBBBA, and paired with permanent 100% bonus depreciation, most small businesses now have real flexibility in how they expense equipment purchases. But “flexibility” isn’t the same as “it doesn’t matter which one you pick.” The taxable income limitation, the phase-out cap, and the asset-by-asset election make Section 179 and bonus depreciation genuinely different tools, not two names for the same thing.

The information in this article is general in nature and hasn’t been customized for your specific tax situation. Section 179 limits, SUV and luxury auto caps, and Minnesota conformity provisions are subject to annual inflation adjustments and periodic legislative change, so confirm current figures before finalizing an equipment purchase or depreciation election. As an Enrolled Agent working with Minnesota small business owners, I help clients think through exactly this kind of purchase timing and method decision. For personalized guidance on Section 179, bonus depreciation, or your year-end equipment planning, please schedule a consultation.

Related Resources

The Business Operations resources hub has additional guides that pair well with this post:

• Vehicles — Business Use — standard mileage vs. actual expense method, luxury vehicle limits, Section 179, and bonus depreciation for business vehicles
• Business Expenses Worksheet — a tracking worksheet for organizing equipment and other business purchases for tax time
• Excess Business Loss and Net Operating Loss (NOL) — relevant if bonus depreciation pushes your business into a loss for the year