Idaho Plumber License Fees: Every Cost from Apprentice to Contractor
What You'll Actually Pay at Every License Tier
Idaho's Division of Occupational and Professional Licenses (DOPL) charges separate fees for the application, the initial license, and every renewal cycle — and the amounts differ by tier. The table below covers every active plumbing classification as of 2026.
| License Category | Application Fee | Initial License Fee | Term Length |
|---|---|---|---|
| Plumbing Apprentice | $22.50 | $50.00 | 5 years |
| Journeyman Plumber | $22.50 | $29.40 | 3 years (transitioning to 2 years) |
| Plumbing Contractor | $22.50 | $147.00 | 3 years (transitioning to 2 years) |
| Specialty Apprentice | $22.50 | $30.00 | 3 years |
| Specialty Journeyman | $22.50 | $29.40 | 3 years |
| Specialty Contractor | $22.50 | $147.00 | 3 years |
Application fees are separate from license fees, so making sure your paperwork is correct before you file matters more than it might seem.
Exam Fees (Separate from Licensing)
DOPL does not administer trade exams directly. PSI Services handles scheduling and proctoring, and candidates pay PSI a flat $75 per attempt. That fee is non-refundable, non-transferable, and valid for one year from payment. If you fail, you can retake the exam as many times as needed, but each attempt costs another $75.
The journeyman exam is a 100-point, open-book test with a three-hour time limit and a 70% passing threshold. The contractor exam runs four hours and adds business law sections. Both require scheduling at least two days ahead, and cancellations within that window forfeit the fee.
One sequencing rule catches people off guard: for a journeyman or specialty journeyman license, you must pass the PSI exam before submitting your license application to DOPL. The contractor process runs in the opposite order: submit the contractor application first, then schedule the contractor exam after DOPL approves it.
Renewal Fees and the Biennial Transition
Historically, journeymen and contractors renewed on a three-year cycle. Starting with renewals on or after July 1, 2026, DOPL is shifting plumbing licenses to a two-year biennial renewal. The transition is staggered by birth year:
- Even-year birthdays transition in even-numbered years (2026, 2028, etc.)
- Odd-year birthdays transition in odd-numbered years (2027, 2029, etc.)
When your license moves to the two-year cycle, the renewal fee doubles to cover both years upfront. So the journeyman renewal goes from roughly $21.60 per year to $43.20 for two years, and the contractor renewal jumps from about $108 per year to $216 for the full biennial period.
Apprentice registrations are also adjusting — the five-year term shifts to a two-year cycle at $60, with a $30 renewal fee. The exact fee scheduled for your specific birth-year tier is always visible in your DOPL customer portal at edopl.idaho.gov.
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Reinstatement Fees for Lapsed Licenses
Letting a license lapse has real consequences beyond the reinstatement fee itself. Any hours worked during a lapsed apprentice registration period are legally void and cannot count toward your experience total. DOPL charges the same reinstatement fee as the initial license fee:
- Apprentice reinstatement: $50.00
- Journeyman reinstatement: $29.40
- Contractor reinstatement: $147.00
If your apprentice registration lapses and you continue working, those hours simply vanish from your qualifying record. For someone close to the 8,000-hour threshold, that gap can push their journeyman exam eligibility back by months.
Hidden Costs That Don't Show Up on the Fee Schedule
The DOPL fee schedule only covers the state's cut. Several other costs hit your budget during the licensing process:
Trade school tuition. Apprentices on the schooling pathway (8,000 hours of OJT plus 576 classroom hours over four years) pay roughly $1,950 per year at programs like North Idaho College or the College of Western Idaho. Idaho Launch scholarships can offset some of that cost, but you'll need to apply through the school's workforce training division.
Compliance bond. Contractors must carry a $2,000 surety bond before DOPL issues the contractor license. The bond premium — the annual amount you pay to a bonding company — typically runs 1-5% of the bond amount for applicants with clean credit, so roughly $20-$100 per year for the $2,000 bond.
General liability insurance. The state minimum is $300,000 per occurrence. Most commercial project owners require $1,000,000/$2,000,000 aggregate before allowing site access, so the practical floor is higher than the legal one.
Workers' compensation. Required under Idaho Code Title 72 as soon as you hire your first employee.
Local permit fees. These vary by municipality. The state charges its own permit fees for unincorporated areas, and cities like Boise, Meridian, Idaho Falls, and Nampa set their own rates. Starting plumbing work before securing the appropriate permit triggers a double-fee penalty.
Keeping Costs Down
The biggest unnecessary expense in the Idaho plumbing licensing process is filing things incorrectly and paying again. A rejected application still costs $22.50. A failed exam still costs $75. A lapsed apprentice registration still voids every hour worked during the gap.
The Idaho Plumber License Guide walks through the complete fee schedule, application sequence, and documentation requirements for every tier — from apprentice registration through contractor licensing — so you can get each step right the first time.
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