Tax

Section 179

Section 179 is a tax rule that lets a business deduct the full cost of qualifying property in the year it is placed in service, instead of depreciating it over several years. The deduction is subject to an annual limit and to taxable income.

Reviewed November 3, 2026

Why it matters

Section 179 can reduce a profitable business's tax bill in the year it buys equipment. The client still needs the purchase records, the placed-in-service date and the business-use percentage.

Example

A client buys $50,000 of qualifying equipment and places it in service before year end. The preparer reviews the Section 179 limit, the business income and the client's elections before deducting the cost.

Related terms

Questions about Section 179

Does Section 179 apply to every asset?

No. The property must qualify and be used in the business. The rules exclude some property and limit the deduction for assets used partly for personal purposes.

Can Section 179 create a loss?

The deduction is generally limited to the business's taxable income from the active trade or business. A business with no income may not be able to use the full deduction in that year.

Sources

Checked November 3, 2026. Public pages and tax rules change; confirm them before relying on them.

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