QUICK ANSWER
Section 179 lets small businesses deduct the full purchase price of qualifying equipment, vehicles, and off-the-shelf software in the year it is placed in service, instead of depreciating it over five to seven years. For tax years beginning in 2026 the deduction limit is 2.5 million dollars, indexed for inflation, with a dollar-for-dollar phase-out once total equipment purchases pass 4 million dollars — thresholds far above what a typical small business spends, so in practice most owners can write off everything they buy. You claim it on Form 4562, the equipment must be in actual use by December 31, and the deduction cannot exceed your business income for the year.
Key Takeaways
- Placed in service beats purchased — a machine bought December 28 but delivered January 5 is a 2027 deduction, so order early in Q4.
- Financing does not reduce the deduction — equipment bought on a loan or lease-to-own qualifies in full even though you have paid only a fraction in cash.
- Business income caps the write-off — Section 179 cannot create a loss, though unused amounts carry forward; 100 percent bonus depreciation can absorb the rest.
- Heavy SUVs have their own cap — vehicles between 6,000 and 14,000 pounds gross weight are limited to an inflation-indexed cap of just over 31,000 dollars in Section 179 expensing.
What Is the Section 179 Deduction?
Normally, when a business buys a 60,000 dollar skid steer, the tax code treats it as an asset to be depreciated — deducted in slices over its useful life. Section 179 of the tax code is the election that says: skip the slices, deduct all 60,000 dollars this year. For a profitable business in a combined 30 percent federal and state bracket, that election turns the purchase into roughly 18,000 dollars of immediate tax savings instead of the same savings dribbled out over seven years.
The 2025 tax law made expensing dramatically more generous and made the changes permanent: the Section 179 limit was raised to 2.5 million dollars (indexed for inflation going forward) with the phase-out starting at 4 million dollars in total purchases, and 100 percent bonus depreciation was restored permanently for property acquired after January 19, 2025. The practical upshot for 2026: almost any genuinely small business can immediately expense essentially all of its equipment spending, using Section 179, bonus depreciation, or both.
What Qualifies (and What Does Not)
Qualifying property includes machinery and equipment, work vehicles, computers and off-the-shelf software, office furniture, and certain improvements to nonresidential buildings — roofs, HVAC, fire suppression, security systems. Used equipment qualifies as long as it is new to you. The property must be used more than 50 percent for business, and only the business-use percentage is deductible. What does not qualify: land, buildings themselves, inventory, property used outside the US, and property bought from a related party. Air conditioning a rental house you own, for example, is out — Section 179 generally excludes residential rental property.
How to Claim Section 179, Step by Step
1. Buy It and Place It in Service by December 31
The equipment must be installed and ready for use in your business by year-end — delivery dates, not invoice dates, control. Financed purchases count in full, which is why Q4 equipment financing offers cluster around this deduction.
2. Keep the Paper Trail
Save the invoice, proof of payment or financing agreement, delivery or installation record, and a note of the in-service date. For vehicles, log business versus personal miles from day one — the 50 percent business-use test is where audits of this deduction focus.
3. Elect It on Form 4562
Section 179 is claimed in Part I of Form 4562, filed with your business return — Schedule C for sole proprietors and single-member LLCs, Form 1120-S or 1065 for S-corps and partnerships. List each asset, its cost, and the amount you elect to expense. Tax software handles the form, but you make the election asset by asset, which is where strategy comes in.
4. Mind the Business Income Limit
Your Section 179 deduction cannot exceed your net business income for the year (W-2 wages count for this test too). Anything disallowed carries forward indefinitely. If your income is low this year, consider electing bonus depreciation instead — it has no income limit and can create a net operating loss — or simply depreciating normally to save deductions for higher-bracket years.
Section 179 in 2026: The Key Numbers
| Item | 2026 Rule |
|---|---|
| Maximum deduction | $2.5 million (inflation-indexed) |
| Phase-out begins | $4 million in total equipment purchases |
| Heavy SUV cap (6,000–14,000 lbs) | Just over $31,000 |
| Bonus depreciation | 100%, permanent, no income limit |
| Deadline | Placed in service by December 31, 2026 |
| Claimed on | Form 4562, Part I |
Section 179 vs Bonus Depreciation
With bonus depreciation back at a permanent 100 percent, the two tools overlap heavily, but they are not identical. Section 179 is elected asset by asset and even dollar by dollar, giving you fine control — expense the truck, depreciate the shelving. Bonus depreciation applies automatically to entire classes of assets unless you elect out, and it ignores the business income limit. Many small businesses use Section 179 first for its precision, then let bonus depreciation sweep up the remainder. State taxes are the wrinkle: a number of states cap Section 179 at lower amounts or decouple from federal bonus depreciation entirely, so your state return may depreciate the same asset differently. This is a genuinely good question for a CPA in November, not April.
Recommended Resources
TurboTax Home & Business 2025 — walks Schedule C filers through Form 4562 and the Section 179 election interview, including the vehicle questions that trip people up.
Accounting All-in-One For Dummies — its fixed asset and depreciation chapters explain how expensed equipment should sit on your books versus your tax return.
Frequently Asked Questions
Can I take Section 179 on a vehicle for my business?
Yes, but the rules depend on the vehicle’s gross vehicle weight rating (GVWR), and this is where most mistakes happen. Ordinary passenger cars and light trucks under 6,000 pounds GVWR are subject to the annual luxury auto depreciation caps, which limit the first-year write-off to roughly 20,000 dollars when bonus depreciation applies — generous, but not the full price. Vehicles between 6,000 and 14,000 pounds GVWR — most full-size pickups, large SUVs like a Suburban or Expedition, and many work vans — can take Section 179 up to the inflation-indexed SUV cap of just over 31,000 dollars, and 100 percent bonus depreciation can generally cover much of the rest of the business-use portion. Vehicles that are clearly work equipment — cargo vans without rear seating, box trucks, vehicles with a fully enclosed cargo area — escape the SUV cap entirely and can be expensed in full. Two conditions apply across the board: business use must exceed 50 percent (only the business percentage is deductible), and you need a contemporaneous mileage log to prove it. If business use later drops below 50 percent, part of the deduction is recaptured as income, so do not expense a truck you expect to become the family car.