2026 Section 179: cap jumps to $2.56M, bonus depreciation back to 100%

The Section 179 deduction limit for tax year 2026 is $2,560,000, with the phase-out threshold beginning at $4,090,000 in total equipment purchases. The 2026 cap is roughly double the pre-OBBBA 2024 limit and applies to property placed in service during the 2026 tax year. Separately, the One Big Beautiful Bill Act (OBBBA), signed in mid-2025, restored 100% bonus depreciation for qualifying property, reversing the TCJA phase-down that had stepped bonus depreciation to 40% in 2025 and would have taken it to 20% in 2026.

For most small and mid-size fleet operators the higher Section 179 cap is comfortably abstract — a fleet adding three trucks at $95,000 each is at $285,000 in equipment purchases, an order of magnitude under the phase-out threshold. The change that actually moves the math for larger operators is bonus depreciation: fleets that exceed the Section 179 cap, or that hit the business income limitation (Section 179 deduction cannot exceed net income from active trades or businesses), can now write off the remaining basis at 100% in year one rather than the 40%/20% step-down that would otherwise have applied.

What qualifies

Section 179 applies to tangible personal property used for business purposes. For fleet operators that includes:

• Commercial trucks and trailers placed in service in 2026 and used for business more than 50% of the time
• Specialty equipment: liftgates, refrigeration units, safety equipment installed on existing vehicles
• Off-the-shelf software used for fleet management or dispatch

Real-property improvements (facility renovations, building additions) generally do not qualify for Section 179, though some qualified improvement property may qualify for bonus depreciation separately. The SUV cap moved to $32,000 for 2026 — relevant for operators buying SUVs above 6,000 lbs GVWR for crew transport or executive use.

What it looks like on a single truck

For a $95,000 Class 8 truck placed in service in 2026 at a 25% effective tax rate, the full purchase price falls under the Section 179 cap. Year-one deduction is $95,000, first-year tax savings are $23,750, and the after-tax cost of the truck is approximately $71,250. The OBBBA bonus-depreciation restoration does not change this math — Section 179 already covers the full basis.

Where OBBBA matters: a fleet placing $5M of equipment in service in 2026 exceeds the Section 179 cap by $2.44M. Under the prior TCJA phase-down schedule only 20% of that excess (~$488,000) would have been first-year deductible via 2026 bonus depreciation. Under restored 100% bonus depreciation the full $2.44M is first-year deductible — a $1.95M swing in year-one write-off, worth ~$488,000 in tax savings at a 25% rate.

Small fleets are largely unaffected by the bonus-depreciation change; Section 179 alone already covers the equipment. Mid-to-large fleets making single-year capital pushes — terminal build-outs, multi-truck adds, equipment-heavy contract starts — capture the full benefit.

Talk to your accountant before year-end if you are planning equipment purchases. The interaction of Section 179, bonus depreciation, business income limits, and OBBBA effective dates is fact-specific, and the timing of a purchase into 2026 versus 2027 can shift which year you capture the benefit.