How much does a mechanical contractor bond cost?

Mechanical contractor license bond premiums typically run 1%–3% of the bond amount. A $10,000 bond costs $100–$300 per year for contractors with good credit; larger amounts scale proportionally.

What trades need a mechanical contractor bond?

HVAC installers, refrigeration contractors, boiler mechanics, piping contractors, and (in some states) any contractor performing mechanical work on commercial buildings. Requirements vary by state — check with your licensing board.

Is a mechanical bond the same as an HVAC bond?

They overlap. States with separate HVAC licenses (Alabama HACR, Florida CACLB) require an HVAC-specific bond. States with a broader "mechanical" classification (Washington, Oregon CCB, NC NCLBGC) use one mechanical contractor bond covering HVAC, refrigeration, and related work.

Last reviewed: April 23, 2026|Next review due: July 22, 2026|Reflects current Mechanical contractor bond calculator requirements

✓ 2026 Requirements Verified

Rates 1% – 3% · HVAC, Refrigeration, Boiler, Piping

Mechanical Contractor Bond Cost Calculator

For HVAC, refrigeration, boiler, and mechanical trades licensed at the state level. Most qualified contractors pay 1%–3% per year.

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Related Resources

Mechanical Contractor Bonds

HVAC Contractor Bond Calculator

Plumbing Contractor Bond Calculator

Electrical Contractor Bond Calculator

Contractor License Bond Calculator

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Eric Drummond, Licensed Surety Producer

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