Plumbing & HVAC Business Tax Guide by State
2026-02-26 · 5 min read · Industry Guide
Trade Business Tax Basics
Plumbing and HVAC businesses average $500K in revenue with 12% profit margins. Vehicle expenses, tool purchases, and licensing fees are major deductible items.
Vehicle Deductions
Work trucks and vans are essential for plumbing/HVAC. You can deduct the full cost under Section 179 (up to $1.16M for 2025) if the vehicle weighs over 6,000 lbs. Lighter vehicles have a $20,400 first-year limit.
Licensing and Insurance
State licensing fees, liability insurance, bonding costs, and continuing education are all deductible. These can add up to $5,000-$15,000 annually.
Compare plumbing/HVAC taxes: all states.
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