How does the Section 179 vehicle deduction work?

Occasionally we receive inquiries from clients who've heard they can purchase a vehicle for work and write off the full cost upfront. They're commonly referring to the Section 179 vehicle deduction provision and bonus depreciation rules in tax law.

The 179 deduction is often misunderstood and misused. Many tout it as a way to get a free SUV (or huge deduction), but unfortunately it's not that simple! There are many key requirements and restrictions to get larger deductions for these business vehicles, which I’ve included below (and asterisked the main ones which usually disqualify folks or significantly limit the benefits)…

• Only counts on purchases (whether financed or paid in cash); Section 179 and bonus depreciation do not apply on leases
  
• Must be new or used (new to you) and put in biz use the first year (same tax year that you purchased the vehicle)
• SUVs with a gross vehicle weight rating (GVWR) of 6,001-14,000 pounds qualify
  
• Upfront 179 deduction for these vehicles is $31,300 for 2025
  
• Bonus depreciation for remaining basis then kicks in
  
• ** Must be used > 50% for business (every year for 5-6 years…cannot sell, give it away, convert, etc.). Otherwise, deduction applies over 6-year period based on biz use
  • ….and have depreciation recapture of prorated amount (most businesses don’t have business vehicle use that truly exceeds 50% of overall use, which then essentially eliminates the net deduction benefit)
• **Depreciation deduction reduced by any personal use percentage
• **IRS very hard on this, since it’s common for small businesses/rental property owners looking to dump lifestyle/personal expenses into the business to reduce income taxes…so detailed records are vital (purchase agreement, loan terms, GVWR, date placed in service, as well as mileage log to show business vs. personal use kept at time of travel, not reconstructed later)
• You cannot deduct more than your biz net income for the year, so you must have corresponding net income to offset
  • ​If not, the deduction can carry over to future years
• Must be titled in name of business if the business is its own legal entity (LLC, S-Corp, C-Corp). For sole proprietors, the vehicle can be titled in your personal name and still qualify.

Example: You purchase a $75,000 SUV with GVWR of 7,400 pounds and use the vehicle 100% for business. You would get a $31,300 section 179 deduction upfront. You would then get an additional $43,700 deduction for your remaining basis ($75,000 - $31,300). So your total first year deduction would be $75,000.

Important Notes: But remember, once you sell the vehicle, your basis and possible gains will be reconciled. So because you've deducted the full value of the vehicle upfront, your remaining basis is now $0. So let's say you sell the vehicle in year 5 for $25,000...you would have a $25,000 gain reported on your tax return that year ($25,000 sales price - $0 basis). So even if you use the vehicle for business > 50% every year, you may still have a reportable/taxable gain upon sale.