What Is Section 179? How the Deduction Works for Micro Welding Equipment, and How to Qualify

Section 179 of the federal tax code lets a business deduct the full purchase price of qualifying equipment in the year it's placed in service (installed and ready to use), instead of writing it off a little at a time over several years. The deduction is capped by an annual limit, and it can't be more than your business income for the year. If a new welder is already in your plans, Section 179 is one of the best reasons to buy it this year instead of next.

What Section 179 can save your business

Say a manufacturer adds a $10,500 Wave AC resistance welder to its production line and has it installed and ready to run by the end of its tax year. It can deduct the full $10,500 from that year's taxable income: about $2,205 less in federal tax at the 21% corporate rate. The same goes for a laser welder on a jeweler's or dental lab's bench.

Section 179 is simple to use: buy qualifying equipment, put it in service by the end of your tax year, and deduct it from that year's taxable income, even if you financed it. Here's how it works for micro welding equipment, how to qualify, this year's limits, the deadline and examples of deductions for various welders.*

* The following post contains general information about Section 179, and is not tax advice. Talk with your tax advisor about the particulars of your situation.

In this guide

• Does your welder qualify for Section 179?
• Section 179 limits and deadline for 2026
• How Section 179 financing works
• What "placed in service" means for production equipment
• Section 179 vs. bonus depreciation
• Section 179 examples for welding equipment
• How your business structure changes your savings
• Section 179 carryover: when your deduction is bigger than your income
• Plan backward from the end of your fiscal tax year
• Section 179 checklist for your tax advisor
• Section 179 financing FAQ

Does your welder qualify for Section 179?

Most micro welding equipment qualifies. What qualifies for Section 179 comes down to five requirements, and your purchase needs to meet all five:

• It's equipment you use in your business. The IRS calls qualifying equipment "Section 179 property," and machinery like welders, weld heads and laser welding cells falls into that group.
• You bought it. Paying cash and financing both count. Equipment bought from a family member, or from a company you or your family control, doesn't qualify.
• It's new to you. New and used equipment both qualify, as long as your business hasn't owned or used it before.
• It's used for business more than 50% of the time. If it's also used for other things, you can only deduct the business-use share of the price.
• It's placed in service by the end of your tax year. That means installed and ready to use, not just delivered. See what "placed in service" means for examples.

You don't need a large tax bill to use Section 179. If your deduction is more than your business income for the year, the rest becomes a carryover you can deduct in a later year.

Section 179 limits and deadline for 2026

Section 179 has a yearly deduction limit, and that limit shrinks for businesses that put a lot of equipment into service in one year. For example, a business that puts $4,200,000 of qualifying equipment into service in 2026 is $110,000 over the $4,090,000 threshold, so its limit drops from $2,560,000 to $2,450,000. Most small and midsize businesses never get close.

How Section 179 financing works

Financing equipment allows you to make payments on your purchased business equipment over time and still qualify for Section 179 tax savings. When you finance your equipment the deduction is based on the full purchase price, not the dollar amount of the payments you've made. Example: a financed system placed in service in December is fully deductible on that year's return, even though the payments run on into the next few years.

Here's an example of what that could look like with an Omega PA250i Welding System at its $37,000 list price:

• The welder is financed in November, installed and ready for business use in December.
• The full $37,000 is deducted on that year's return. At the 21% corporate rate, that's about $7,770 less federal tax owed.

This financing example is for illustration only. Actual payments vary, and financing is subject to credit approval.

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What "placed in service" means for production equipment

Placed in service means that in order to be eligible for a Section 179 tax deduction, equipment must be set up and ready to use by December 31.

Note: If your business uses a fiscal year, the deadline is the last day of your tax year rather than December 31.

The IRS says equipment is placed in service when it's "ready and available for a specific use." Ordering it, paying for it, and having it delivered isn't sufficient to meet Section 179 requirements. The machine has to be installed and ready to run, though production isn't required to have started. The day that it's ready to run is your placed-in-service date, and decides which tax year you're eligible for the deduction.

The following chart contains three examples for a business whose tax year ends December 31:

If you want a system to qualify for the current tax year, make sure to budget time for installation and setup by planning in advance with a Sunstone micro welding expert.

Section 179 vs. bonus depreciation

Bonus depreciation is a separate tax break that also lets a business write off the full cost of qualifying equipment in the year it's placed in service. Since the One Big Beautiful Bill Act passed in 2025, 100% bonus depreciation is permanent. It applies automatically to qualifying equipment acquired and placed in service after January 19, 2025, unless a business opts out.

Under 2017 tax law, that write-off was shrinking by 20 percentage points a year (80% in 2023, 60% in 2024 and 40% in 2025); "permanent" means it now stays at 100%, with no phase-down scheduled.

Bonus depreciation and Section 179 work differently. Section 179 is elected, has a dollar cap and phase-out, and can't create a business loss. Bonus depreciation has no dollar cap or phase-out. Your tax advisor decides which to use, and the two can be combined.

The practical point is the same either way: timing is the decision. Equipment placed in service by the end of the fiscal tax year comes off that year's return; equipment placed in service during the next fiscal tax year waits for next year's return.

Section 179 examples for welding equipment

List prices as of November 5, 2026, with estimated first-year federal tax savings at the 21% corporate rate and a 24% owner's bracket.

View Omega PA250iView Advanced Dual Pulse CDView SFL Fiber LaserView Orion LZR PROView Orion 200xView Orion 150xView Picó DCView Wave AC

View these welders: Omega PA250i · Advanced Dual Pulse CD · SFL Fiber Laser · Orion LZR PRO · Orion 200x · Orion 150x · Picó DC · Wave AC

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How your business structure changes your savings

If a C corporation pays a flat 21% federal rate, its tax savings are up to the price of the equipment × 21%. In a pass-through business, like most LLCs, S corporations and sole proprietorships, the deduction flows to the owners, so the savings depend on each owner's tax bracket. Our Section 179 calculator lets you pick either one, the 21% corporate rate or your own tax bracket, to estimate your tax savings.

Section 179 carryover: when your deduction is bigger than your income

Section 179 has a second limit besides the dollar cap: the deduction can't be more than your business's taxable income for the year. Whatever that income limit blocks isn't lost. It becomes a Section 179 deduction carryover, also called a carryforward, that you can deduct in a later tax year, with no limit on how many years it can carry forward.

Say a business with $30,000 of taxable business income puts a $37,000 Omega PA250i in service and elects to expense all of it. It can deduct $30,000 this year. The other $7,000 carries over to next year or later.

Only the part blocked by the income limit carries over. Cost over the dollar limit doesn't; it's depreciated instead.

A carryover still counts toward the limits in the year you use it, so it can't push you past that year's dollar cap or income limit.

In an S corporation or partnership, the income limit applies at both the business level and the owner level.

Bonus depreciation isn't limited by income and can create a loss, which is why tax advisors often use it instead when income is tight.

Your tax advisor tracks the carryover on IRS Form 4562 each year.

Plan backward from the End of Your Fiscal Tax year

Step 1: Send samples for a free micro-weld evaluation

Our application team welds your parts and recommends the right system and configuration.

Step 2: Get a quote, and order early enough to have it placed in service before your tax year ends

Our experts will confirm the lead time, so you can leave room for delivery, installation and setup.

Step 3: Installed and ready by the end of your tax year

Once your equipment meets these conditions your tax advisor claims it on IRS Form 4562 with that year's return.

Section 179 checklist for your tax advisor

Keep these records and share them with your tax advisor when you file. They support your deduction if the IRS ever asks about it.

• Invoice showing the purchase price
• The placed-in-service date, with an installation sign-off or a dated photo
• Business-use percentage (more than 50%)
• Your loan or financing agreement, if you financed the purchase

Section 179 financing FAQ

How does Section 179 work?

It lets a business deduct the full price of qualifying equipment in the year it's placed in service, instead of depreciating it over several years. The equipment has to be used for business more than 50% of the time and be installed and ready to use by the end of your tax year.

Does financed equipment qualify for Section 179?

Yes. You deduct the full purchase price in the year the equipment is placed in service, even while you're making payments.

What is the Section 179 limit for 2026?

$2,560,000, with the phase-out starting once qualifying equipment placed in service passes $4,090,000.

What is the Section 179 deadline?

The equipment must be placed in service, meaning installed and ready to use, by December 31 of the year you claim it, or by the last day of your tax year if your business uses a fiscal year. Ordering or paying by then isn't enough. The equipment must be placed in service and be ready for business use.

Does used equipment qualify?

Yes, if it's new to your business.

What is Section 179 recapture?

If business use of the equipment drops to 50% or less in a later year of its depreciation schedule, part of the deduction is added back to your income. The amount is the difference between the Section 179 deduction you took and the depreciation you would have taken otherwise. Your tax advisor reports it on IRS Form 4797.

What happens if my Section 179 deduction is bigger than my business income?

The part the income limit blocks becomes a Section 179 carryover, which you can deduct in a later tax year. See Section 179 carryover for how it works.

Do state taxes follow the federal rules?

Not always. Some states follow the federal limits and some set their own. Your tax advisor will know your state's rules.

Get a system in service before your tax year ends

Estimate your savings with our Section 179 calculator, request a quote with our team, or start with a free micro-weld evaluation. For help with additional questions, application challenges, or anything related to microwelding, call (801) 658-0015 to speak with our experts.

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This article is general information, not tax advice. Talk with your tax advisor before you buy.