When a business buys equipment, the tax code normally requires you to deduct the cost over several years through depreciation. A $30,000 piece of equipment might give you a $6,000 deduction per year for five years. Section 179 of the tax code changes that: it allows eligible businesses to deduct the entire cost of qualifying business assets in the year they’re placed in service. For cash-flow-conscious small businesses, that front-loaded deduction can be significant.
What Is Section 179?
Section 179 is an elective expensing provision. Instead of capitalizing an asset and depreciating it over its useful life, you elect to expense (fully deduct) the purchase price in year one. The 2024 Section 179 deduction limit is $1,220,000, with a phase-out beginning at $3,050,000 in total asset purchases. For nearly all small businesses, the phase-out is not a concern.
What Qualifies for Section 179
Qualifying property includes:
- Machinery and equipment (manufacturing machines, restaurant equipment, salon chairs)
- Computers, servers, printers, and technology
- Office furniture and fixtures
- Business vehicles (with important limitations ? see below)
- Software (off-the-shelf business software)
- Improvements to nonresidential real property (HVAC, roofs, security systems, fire protection)
The property must be used more than 50% for business, must be purchased (not inherited or gifted), and must be placed in service during the tax year you’re claiming the deduction.
Vehicle Limitations: The “Luxury Auto” Cap
Section 179 for passenger vehicles is subject to strict annual deduction caps. For 2024, the maximum Section 179 deduction for a car or light SUV is approximately $12,400. These “luxury auto” limits apply regardless of the vehicle’s actual cost or business-use percentage.
The exception: heavy vehicles ? SUVs, trucks, and vans with a Gross Vehicle Weight Rating (GVWR) over 6,000 pounds ? are not subject to the luxury auto caps. A $60,000 heavy-duty pickup truck used 100% for business can be fully expensed under Section 179 (up to the $1.22M limit). This is why many business owners specifically shop for vehicles over 6,000 lbs GVWR at year-end.
Section 179 vs. Bonus Depreciation: What’s the Difference?
Both allow accelerated deductions on business assets, but they work differently:
Section 179
- You choose how much to deduct (up to the full cost, up to the annual limit)
- Cannot create a tax loss ? deduction is limited to your taxable business income
- Can be split across multiple assets
- Must be elected on your tax return
Bonus Depreciation
- Applies automatically to all qualifying assets unless you elect out
- Can create a tax loss (which can be carried forward)
- For 2024: 60% bonus depreciation (down from 100% in prior years, declining by 20% per year)
- Applies to new and used property
In practice, businesses often combine both: use Section 179 first to eliminate taxable income to zero, then apply bonus depreciation if there’s remaining cost basis ? though the loss-creation risk needs to be evaluated carefully.
The Income Limitation on Section 179
Section 179 deduction cannot exceed your taxable income from business activity. If your business has $40,000 in net income before Section 179, you can deduct up to $40,000 ? not more. Any Section 179 amount in excess of income is carried forward to the next tax year, not lost permanently.
This limitation is why Section 179 alone isn’t always the answer if you’re in a loss year. Bonus depreciation doesn’t have the income limitation, which can make it more powerful in specific situations.
Timing: Why Year-End Equipment Purchases Come Up So Often
Section 179 deductions require the asset to be “placed in service” during the tax year ? meaning it’s operational and available for business use, not just ordered or paid for. A computer you buy and set up on December 30 qualifies for the full deduction that year.
This is why many business owners accelerate equipment purchases before December 31. If you need new equipment and you’re having a profitable year, buying it before year-end can significantly reduce your tax bill.
Common Pitfalls
Forgetting the 50% Business Use Test
Property that drops below 50% business use in any year after it’s placed in service is subject to depreciation recapture. You’ll owe back some of the deduction you took. For assets used in both personal and business contexts, track usage carefully.
Expensing Assets You Might Sell Soon
If you fully expense an asset under Section 179 and then sell it, you’ll recognize the sale proceeds as ordinary income (up to the amount expensed). For assets with a high likelihood of resale, standard depreciation may actually result in better tax treatment.
Not Keeping Purchase Records
Maintain receipts, invoices, and proof of payment for every asset you expense. The IRS can ask for documentation years after the purchase.
Should You Elect Section 179 This Year?
It depends on your current year income, your marginal rate this year vs. future years, your state tax treatment (not all states conform to federal Section 179), and your overall tax planning picture. As year-end approaches, a tax projection that includes Section 179 modeling can clarify whether accelerating the deduction now or spreading it out is the better strategy for your situation. Book a free call to run those numbers before December 31.
