Tax glossary

Section 179 Deduction

Section 179 Deduction — what it means, how it works, and a real example, explained without the jargon.

What is Section 179 Deduction?

Section 179 lets a business deduct the full cost of qualifying equipment in the year you buy it, instead of depreciating it slowly over years.

How it works

You elect it on Form 4562, up to an annual dollar limit that runs into the low millions. It's designed to reward businesses for investing in themselves, and it can turn a profitable year into a much lower tax bill.

A quick example

A contractor buys a $40,000 work truck and elects Section 179. Instead of deducting $8,000 a year for five years, they deduct the whole $40,000 now — cutting this year's taxable income sharply.

What people get wrong

Section 179 can't create a loss — it's capped at your business income. If you want to deduct beyond that, bonus depreciation can pick up where 179 leaves off.

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Frequently asked questions

What does Section 179 Deduction mean?

Section 179 lets a business deduct the full cost of qualifying equipment in the year you buy it, instead of depreciating it slowly over years.

How does Section 179 Deduction work?

You elect it on Form 4562, up to an annual dollar limit that runs into the low millions. It's designed to reward businesses for investing in themselves, and it can turn a profitable year into a much lower tax bill.

What's the most common mistake with section 179 deduction?

Section 179 can't create a loss — it's capped at your business income. If you want to deduct beyond that, bonus depreciation can pick up where 179 leaves off.