Can I Deduct My Truck? New 2026 Tax Rules for Contractors

Can I Deduct My Truck? New 2026 Tax Rules for Contractors

The short answer is yes—but the details matter enormously. Section 179 allows contractors to deduct the cost of work trucks, but the deduction depends on vehicle weight, business use percentage, and proper documentation.

Key Rules for 2026

• Vehicle Weight Matters — Trucks over 6,000 lbs GVWR qualify for larger Section 179 deductions
• Business Use Percentage — You can only deduct the business-use portion. A truck used 80% for business and 20% personal can only deduct 80%
• Mileage Logs Are Non-Negotiable — Without a mileage log or proof of business use, the IRS will disallow the deduction
• Bonus Depreciation at 40% — Down from 60% in 2025, making Section 179 even more important

How to Maximize Your Deduction

1. Keep a detailed mileage log (apps make this easy)
2. Document business purpose for every trip
3. Separate personal and business use clearly
4. Time purchases strategically within the tax year
5. Work with a controller who understands construction tax strategy

Common Mistakes

• Claiming 100% business use on a vehicle used personally
• No mileage documentation
• Missing the Section 179 phase-out threshold
• Not coordinating with bonus depreciation schedule