Section 179: How the Equipment Deduction Works

What Section 179 actually does

It allows a business to expense the purchase price of certain qualifying property in the first year, rather than depreciating it slowly over its useful life.

Normally, when you buy a machine, you deduct its cost a little at a time over years through depreciation. Section 179 is an election that accelerates this. You choose to treat all or part of the cost as an expense in the year the asset is placed in service. That can lower taxable income sooner.

It is a timing benefit, not free money. A deduction reduces your tax by your tax rate times the amount deducted. A $50,000 machine does not produce a $50,000 refund. For background, see what is depreciation.

What generally qualifies

Tangible business equipment, certain software, and some improvements to nonresidential property can qualify, if the business uses it enough for business purposes.

Examples that commonly qualify include machinery, tools, office furniture, computers, off-the-shelf software and certain vehicles. The property must be used for business, and usually more than half of its use must be for business. Land and most buildings do not qualify, and some vehicle categories have special limits.

The rules about which vehicles qualify, and how much of a vehicle deduction is allowed, are detailed. Ask a tax professional before you assume a truck or van is fully deductible. Related reading: depreciation basics and how to track business expenses.

Limits, phase-outs and taxable income

Section 179 has an annual dollar cap, a phase-out when you buy a lot of equipment, and a limit tied to business taxable income. Check current numbers each year.

Three limits matter:

1. A maximum deduction for the year
2. A threshold of total equipment purchased, above which the maximum is reduced
3. A cap based on your business's taxable income, so you generally cannot create a loss with the deduction

The dollar amounts are adjusted over time and Congress changes them. We do not list them here because a wrong number would hurt you. Check the IRS instructions for Form 4562 or ask your accountant for the figures that apply to the year you buy.

How it differs from bonus depreciation

Bonus depreciation is a separate first-year deduction with different rules. Many owners use both, and an accountant can choose the best mix for the year.

Section 179 is an election you control asset by asset, and it is limited by income. Bonus depreciation applies automatically unless you opt out, has no income limit, and its percentage has been changing under current law. They interact, and the right combination depends on your income this year and next.

It may be smarter not to take the biggest deduction now. If you expect higher income next year, spreading deductions can save more. This is a planning decision, not a rule. Our overview of tax write-offs for the self-employed shows how deductions fit together.

Financed equipment can still qualify

You can generally take the deduction on equipment bought with a loan or financing, as long as you place it in service in the tax year. The debt does not cancel the benefit.

Many owners think they must pay cash to claim the deduction. In general, buying with financing still allows you to claim it for qualifying property placed in service during the year. The deduction reflects the cost of the asset, not how you paid for it. Confirm treatment of specific lease structures with your accountant, because a true lease and a financed purchase can be handled differently. See equipment leasing.

Do not let the deduction drive a purchase you would not otherwise make. Spending a dollar to save thirty cents of tax is still a loss of seventy cents.

Plan the payback, not just the deduction

The right test is whether the equipment earns more than it costs. A tax deduction improves the return, but it should not be the reason to buy.

Here is an illustrative example. A fabrication shop considers a $60,000 machine that adds $2,500 a month of net profit. Payback is 24 months before taxes. If a deduction saves, say, $15,000 of tax in the first year, the effective cost drops to $45,000 and payback shortens to about 18 months. That is a real help, but the machine must still earn its keep.

If you need to finance it, ROI Funder places equipment financing with funding in 2 to 7 days, and the equipment itself serves as collateral. It considers 500+ FICO, 6+ months in business and $20,000+ monthly revenue. Use the equipment payback period calculator before you commit.