Taxes & Entities

Section 179

Section 179 lets a business immediately expense qualifying equipment up to an annual cap — but its cap, its phase-out for big spenders, and its no-loss rule are the real lesson: the limits written into a rule are a targeting mechanism, and reading a rule's shape tells you exactly who it's designed for.

  • Advanced
  • 10 min total
  • 12 chapters

What decision this helps you make: How to use Section 179 versus other acceleration tools — and, more broadly, how to read a rule's caps and phase-outs to know who it's meant for and when it fits you.

What this topic is

A provision letting a business elect to deduct the full cost of qualifying equipment immediately, up to an annual dollar limit, with a phase-out for large buyers and no ability to create a loss.

Why it matters

Its limits deliberately target small and medium businesses — teaching that a rule's caps and phase-outs reveal who it's designed for and how to read any incentive's intent.

Who should learn it

Small and medium business owners buying equipment, and anyone learning to read the structure of rules and offers to find their intent.

What you will understand

  • Section 179 immediately expenses qualifying equipment up to a cap
  • A phase-out reduces it once purchases exceed a threshold
  • It can't create a loss (limited to business income)
  • The limits reveal who the rule is designed for

Prerequisites

Common misconception

"Section 179 and bonus depreciation are basically the same thing." They both accelerate deductions, but they're shaped differently on purpose: Section 179 has a dollar cap, phases out for large buyers, and can't create a loss — limits that target it at smaller businesses — while bonus depreciation is broad and uncapped. The differences aren't trivia; they're the intent.