Idaho HVAC License Cost

State License Fees at Each Level

Idaho's HVAC license fees are set by the Division of Occupational and Professional Licenses (DOPL) and vary by credential level:

• Apprentice Registration: $10
• Journeyman License: $150
• Contractor License: $225
• Application Processing Fee: $35 (non-refundable, required for both journeyman and contractor applications)

These fees are paid directly to DOPL when you submit your license application. The application fee is separate from the license fee — you pay $35 to have DOPL process your paperwork, and the license fee is charged when the credential is issued.

PSI Exam Fees

Trade exams in Idaho are administered by PSI Services, and the fees are separate from DOPL's charges:

• Journeyman Trade Exam: $75 per attempt
• Contractor Trade Exam: $75 per attempt
• Business and Law Exam (contractors only): $75 per attempt

Each fee is non-refundable and the testing credit stays valid for one year. There's no waiting period between failed attempts, so you can reschedule immediately — but every retake costs another $75. Three failed attempts on the journeyman exam alone adds $225 to your total cost.

Budget for reference materials too. The journeyman exam requires the 2018 International Mechanical Code and 2018 International Fuel Gas Code as open-book references. The contractor exam adds the DBS Contractor's Business & Law Manual and Idaho HVAC Statutes/Rules. Purchasing these code books typically runs $150 to $250 depending on format and vendor.

Contractor Startup Costs Beyond the License Fee

The $225 license fee is just the DOPL charge. Contractors face several additional mandatory costs:

$2,000 Compliance Bond: Filed with DOPL on Form HVC-02A, this surety bond guarantees that your work conforms to state mechanical codes. You don't pay the full $2,000 — you pay a premium to a surety company, typically $100 for a one-year bond or $250 for a three-year bond. The bond must remain effective for your entire licensing period.

General Liability Insurance: DOPL itself only requires the compliance bond at the state level. However, virtually every municipal building department — Boise, Meridian, Nampa, and others — requires proof of at least $300,000 single-limit general liability insurance before you can pull mechanical permits locally. Plan on this expense as effectively mandatory.

Workers' Compensation Insurance: Legally required if you employ anyone — full-time, part-time, temporary, or family members. Sole proprietors without employees can file an exemption statement instead.

General Contractor Registration: If your projects exceed $2,000 in value and include work outside the narrow HVAC trade scope, you'll need a separate registration with the Idaho Contractors Board. This costs $50 and requires its own proof of $300,000 GL insurance.

The Biennial Renewal Transition

Idaho is shifting from annual to biennial (two-year) renewal cycles. Individual licenses now renew every two years on your birthday. Business licenses renew on the original registration anniversary date.

During this transition, DOPL has implemented a fee holiday: timely renewals currently cost $0. Once the transition completes and the fee holiday lifts, expect biennial renewal fees to aggregate — roughly $300 for contractors and $150 for journeymen per two-year cycle.

Late renewals don't get the fee holiday benefit. If you miss your renewal window, you'll owe the full accumulated fees plus reinstatement penalties. An expired license also means you cannot legally work until it's reinstated, which can cost you weeks of income on top of the financial penalties.

Total First-Year Cost Estimates

Here's a realistic range for each credential level, assuming you pass on the first attempt:

The gap between the minimum contractor cost ($510 to get the license issued) and the operational cost ($1,500 or more to actually pull permits and start working) is one of the biggest surprises for new contractors. The state license is relatively affordable, but the local insurance requirements to actually operate add up fast.

The Idaho HVAC License Guide includes a complete fee schedule and startup cost calculator so you can budget for the full licensing process before you begin.

See more Idaho guides →