Contractor Examination Providers
Five organizations administer the overwhelming majority of contractor licensing examinations in the United States. State contractor boards do not write or proctor their own exams in most cases; they contract a third-party testing vendor and publish the candidate information bulletin (CIB) on the vendor's portal. The directory below is generated from every state license page on this site and shows which provider each board uses for each trade.
PSI Services LLC
https://www.psiexams.com/en-gb/test-takers/
PSI is the largest contractor licensing exam administrator in the United States. PSI delivers tests at company-owned test centers and at partner Pearson Professional Centers. Most state boards contract PSI for both trade and business-and-law portions. Candidates schedule online, pay PSI directly (typical fee $80–$110 per part), and receive a pass/fail score report at the test center.
Used by 272 state-trade combinations on this site
- Alabama — Carpentry
- Alabama — Low Voltage
- Alabama — Masonry
- Alabama — Painting
- Alabama — Pool Contractor
- Alabama — Roofing
- Alabama — Solar
- Alaska — Low Voltage
- Arizona — Carpentry
- Arizona — Electrician
- Arizona — Fire Sprinkler
- Arizona — General Contractor
- Arizona — HVAC
- Arizona — Landscaping
- Arizona — Low Voltage
- Arizona — Masonry
- Arizona — Painting
- Arizona — Plumber
- Arizona — Roofing
- Arizona — Solar
- Arkansas — Carpentry
- Arkansas — Electrician
- Arkansas — General Contractor
- Arkansas — HVAC
- Arkansas — Low Voltage
- Arkansas — Masonry
- Arkansas — Painting
- Arkansas — Plumber
- Arkansas — Pool Contractor
- Arkansas — Roofing
- California — Carpentry
- California — Electrician
- California — Fire Sprinkler
- California — General Contractor
- California — HVAC Technician
- California — Landscaping
- California — Low Voltage
- California — Masonry
- California — Painting
- California — Plumber
- California — Roofing
- California — Solar
- Colorado — Electrician
- Colorado — General Contractor
- Colorado — HVAC
- Colorado — Plumber
- Colorado — Solar
- Connecticut — Electrician
- Connecticut — Fire Sprinkler
- Connecticut — HVAC
- Connecticut — Plumber
- Connecticut — Solar
- Delaware — Solar
- District of Columbia — Electrician
- District of Columbia — HVAC
- District of Columbia — Low Voltage
- District of Columbia — Plumber
- District of Columbia — Solar
- Florida — Masonry
- Georgia — Carpentry
- Georgia — Electrician
- Georgia — General Contractor
- Georgia — HVAC Technician
- Georgia — Low Voltage
- Georgia — Plumber
- Georgia — Roofing
- Georgia — Solar
- Hawaii — Carpentry
- Hawaii — Electrician
- Hawaii — Fire Sprinkler
- Hawaii — General Contractor
- Hawaii — HVAC
- Hawaii — Landscaping
- Hawaii — Low Voltage
- Hawaii — Masonry
- Hawaii — Painting
- Hawaii — Plumber
- Hawaii — Pool Contractor
- Hawaii — Roofing
- Idaho — General Contractor
- Idaho — Masonry
- Idaho — Solar
- Indiana — Electrician
- Indiana — Plumber
- Iowa — Electrician
- Iowa — Solar
- Kentucky — Electrician
- Kentucky — HVAC
- Kentucky — Low Voltage
- Kentucky — Solar
- Louisiana — Carpentry
- Louisiana — Electrician
- Louisiana — General Contractor
- Louisiana — HVAC
- Louisiana — Low Voltage
- Louisiana — Masonry
- Louisiana — Painting
- Louisiana — Pool Contractor
- Louisiana — Roofing
- Louisiana — Solar
- Maine — Low Voltage
- Maryland — Carpentry
- Maryland — Electrician
- Maryland — General Contractor
- Maryland — HVAC
- Maryland — Landscaping
- Maryland — Low Voltage
- Maryland — Masonry
- Maryland — Painting
- Maryland — Plumber
- Maryland — Pool Contractor
- Maryland — Roofing
- Maryland — Solar
- Massachusetts — Carpentry
- Massachusetts — General Contractor
- Massachusetts — Masonry
- Massachusetts — Solar
- Michigan — Carpentry
- Michigan — Electrician
- Michigan — General Contractor
- Michigan — HVAC
- Michigan — Low Voltage
- Michigan — Masonry
- Michigan — Painting
- Michigan — Plumber
- Michigan — Pool Contractor
- Michigan — Roofing
- Michigan — Solar
- Minnesota — Carpentry
- Minnesota — General Contractor
- Minnesota — Landscaping
- Minnesota — Low Voltage
- Minnesota — Masonry
- Minnesota — Pool Contractor
- Minnesota — Roofing
- Minnesota — Solar
- Mississippi — Carpentry
- Mississippi — Electrician
- Mississippi — General Contractor
- Mississippi — HVAC
- Mississippi — Low Voltage
- Mississippi — Masonry
- Mississippi — Painting
- Mississippi — Plumber
- Mississippi — Pool Contractor
- Mississippi — Roofing
- Mississippi — Solar
- Missouri — Roofing
- Montana — Electrician
- Montana — Low Voltage
- Montana — Plumber
- Montana — Solar
- Nevada — Carpentry
- Nevada — Electrician
- Nevada — Fire Sprinkler
- Nevada — General Contractor
- Nevada — HVAC
- Nevada — Landscaping
- Nevada — Low Voltage
- Nevada — Masonry
- Nevada — Painting
- Nevada — Plumber
- Nevada — Pool Contractor
- Nevada — Roofing
- Nevada — Solar
- New Hampshire — Electrician
- New Hampshire — HVAC
- New Hampshire — Plumber
- New Hampshire — Solar
- New Jersey — Low Voltage
- New Jersey — Solar
- New Mexico — Carpentry
- New Mexico — Electrician
- New Mexico — Fire Sprinkler
- New Mexico — General Contractor
- New Mexico — HVAC
- New Mexico — Landscaping
- New Mexico — Low Voltage
- New Mexico — Masonry
- New Mexico — Painting
- New Mexico — Plumber
- New Mexico — Roofing
- New Mexico — Solar
- New York — Electrician
- North Carolina — Carpentry
- North Carolina — Electrician
- North Carolina — Fire Sprinkler
- North Carolina — General Contractor
- North Carolina — Masonry
- North Carolina — Painting
- North Carolina — Roofing
- North Carolina — Solar
- North Dakota — Solar
- Ohio — Electrician
- Ohio — Fire Sprinkler
- Ohio — General Contractor
- Ohio — HVAC
- Ohio — Low Voltage
- Ohio — Plumber
- Ohio — Solar
- Oklahoma — Electrician
- Oklahoma — Fire Sprinkler
- Oklahoma — HVAC
- Oklahoma — Plumber
- Oregon — Carpentry
- Oregon — Electrician
- Oregon — HVAC
- Oregon — Landscaping
- Oregon — Low Voltage
- Oregon — Masonry
- Oregon — Painting
- Oregon — Plumber
- Oregon — Pool Contractor
- Oregon — Roofing
- Oregon — Solar
- Pennsylvania — Low Voltage
- Rhode Island — HVAC
- Rhode Island — Plumber
- South Carolina — Carpentry
- South Carolina — Electrician
- South Carolina — Fire Sprinkler
- South Carolina — General Contractor
- South Carolina — HVAC
- South Carolina — Landscaping
- South Carolina — Low Voltage
- South Carolina — Masonry
- South Carolina — Painting
- South Carolina — Plumber
- South Carolina — Pool Contractor
- South Carolina — Roofing
- South Carolina — Solar
- Tennessee — Carpentry
- Tennessee — Electrician
- Tennessee — Fire Sprinkler
- Tennessee — General Contractor
- Tennessee — HVAC
- Tennessee — Landscaping
- Tennessee — Low Voltage
- Tennessee — Masonry
- Tennessee — Painting
- Tennessee — Plumber
- Tennessee — Roofing
- Tennessee — Solar
- Texas — Electrician
- Texas — HVAC Technician
- Texas — Landscaping
- Texas — Solar
- Virginia — Carpentry
- Virginia — Electrician
- Virginia — Fire Sprinkler
- Virginia — General Contractor
- Virginia — HVAC
- Virginia — Landscaping
- Virginia — Low Voltage
- Virginia — Masonry
- Virginia — Painting
- Virginia — Plumber
- Virginia — Pool Contractor
- Virginia — Roofing
- Virginia — Solar
- West Virginia — Carpentry
- West Virginia — Fire Sprinkler
- West Virginia — General Contractor
- West Virginia — Landscaping
- West Virginia — Masonry
- West Virginia — Painting
- West Virginia — Roofing
- Wisconsin — Electrician
- Wisconsin — HVAC
- Wisconsin — Low Voltage
- Wisconsin — Plumber
- Wisconsin — Solar
Prometric
Prometric runs a global network of test centers and is the second-most-common contractor exam vendor in the United States. State boards that contract Prometric typically use it for both written and computer-based knowledge tests. Booking is done online via the Prometric scheduler.
Used by 34 state-trade combinations on this site
- Alabama — Electrician
- Alabama — HVAC
- Alabama — Plumber
- Arkansas — Solar
- Connecticut — Low Voltage
- Delaware — Electrician
- Delaware — HVAC
- Delaware — Plumber
- Hawaii — Solar
- Idaho — Low Voltage
- Iowa — HVAC
- Iowa — Plumber
- Kansas — General Contractor
- Maine — Electrician
- Maine — Plumber
- Maine — Solar
- Minnesota — Fire Sprinkler
- Oklahoma — Solar
- Utah — Carpentry
- Utah — Electrician
- Utah — General Contractor
- Utah — HVAC
- Utah — Landscaping
- Utah — Low Voltage
- Utah — Masonry
- Utah — Painting
- Utah — Plumber
- Utah — Roofing
- Utah — Solar
- Vermont — Electrician
- Vermont — Low Voltage
- Vermont — Plumber
- Washington — Low Voltage
- West Virginia — Solar
NASCLA
https://www.nascla.org/page/AccreditedExamInfo
The National Association of State Contractors Licensing Agencies administers the NASCLA Accredited Examination for Commercial General Building Contractors. The exam is delivered at PSI test centers and is recognized by approximately 16 states (see the Reciprocity page) for the commercial general building classification only. NASCLA does not administer trade-specific exams.
Used by 1 state-trade combinations on this site
- Alabama — General Contractor
Pearson VUE
Pearson VUE administers contractor exams in a smaller number of states (notably Hawaii through DCCA-PVL and certain electrical/plumbing trade boards). Pearson uses its own test center network plus on-site testing at participating community colleges.
Used by 19 state-trade combinations on this site
- Alaska — Solar
- Colorado — Carpentry
- Colorado — Masonry
- Florida — Electrician
- Florida — Fire Sprinkler
- Florida — Low Voltage
- Florida — Pool Contractor
- Florida — Roofing
- Kansas — Carpentry
- Kansas — Masonry
- Kentucky — Carpentry
- Missouri — Carpentry
- Missouri — Masonry
- Ohio — Carpentry
- Oklahoma — Carpentry
- Texas — Low Voltage
- Texas — Plumber
- Utah — Fire Sprinkler
- Wisconsin — Fire Sprinkler
ICC (International Code Council)
https://www.iccsafe.org/professional-development/assessment-center/
The International Code Council Assessment Center delivers code-based examinations widely accepted by municipal contractor and trade licensing programs (especially in Texas, Kansas, and Missouri municipalities). ICC publishes the I-Codes used as the technical reference for nearly every state contractor exam.
Used by 14 state-trade combinations on this site
- Alaska — Electrician
- Alaska — HVAC
- Alaska — Plumber
- Colorado — Low Voltage
- Colorado — Roofing
- Indiana — Carpentry
- Indiana — Low Voltage
- Kansas — Electrician
- Kansas — HVAC
- Kansas — Plumber
- Missouri — Electrician
- Missouri — Low Voltage
- New Jersey — Electrician
- Washington — HVAC
Other / state board
A small number of state boards still administer their own examinations in-house at the agency office or through a state university testing center. Check the individual state license page for the exact provider and contact information.
Used by 151 state-trade combinations on this site
- Alabama — Fire Sprinkler
- Alabama — Landscaping
- Alaska — Fire Sprinkler
- Alaska — General Contractor
- Alaska — Landscaping
- Arkansas — Fire Sprinkler
- Arkansas — Landscaping
- Colorado — Fire Sprinkler
- Colorado — Landscaping
- Connecticut — Landscaping
- Delaware — Fire Sprinkler
- Delaware — Landscaping
- Delaware — Low Voltage
- District of Columbia — Fire Sprinkler
- District of Columbia — Landscaping
- Florida — Carpentry
- Florida — General Contractor
- Florida — HVAC Technician
- Florida — Landscaping
- Florida — Plumber
- Florida — Solar
- Georgia — Fire Sprinkler
- Georgia — Landscaping
- Idaho — Electrician
- Idaho — Fire Sprinkler
- Idaho — HVAC
- Idaho — Landscaping
- Idaho — Painting
- Idaho — Plumber
- Illinois — Plumber
- Indiana — Fire Sprinkler
- Indiana — General Contractor
- Indiana — HVAC Contractor
- Indiana — Landscaping
- Indiana — Masonry
- Indiana — Solar
- Iowa — Fire Sprinkler
- Iowa — Landscaping
- Iowa — Low Voltage
- Kansas — Fire Sprinkler
- Kansas — Landscaping
- Kansas — Low Voltage
- Kansas — Solar
- Kentucky — Fire Sprinkler
- Kentucky — Landscaping
- Kentucky — Masonry
- Kentucky — Plumber
- Louisiana — Fire Sprinkler
- Louisiana — Landscaping
- Louisiana — Plumber
- Maine — Fire Sprinkler
- Maine — Landscaping
- Maryland — Fire Sprinkler
- Massachusetts — Electrician
- Massachusetts — Fire Sprinkler
- Massachusetts — HVAC
- Massachusetts — Landscaping
- Massachusetts — Low Voltage
- Massachusetts — Plumber
- Massachusetts — Roofing
- Michigan — Fire Sprinkler
- Michigan — Landscaping
- Minnesota — Electrician
- Minnesota — HVAC Contractor
- Minnesota — Plumber
- Mississippi — Fire Sprinkler
- Mississippi — Landscaping
- Missouri — Fire Sprinkler
- Missouri — HVAC
- Missouri — Landscaping
- Missouri — Plumber
- Missouri — Solar
- Montana — Fire Sprinkler
- Montana — Landscaping
- Nebraska — Electrician
- Nebraska — Fire Sprinkler
- Nebraska — HVAC
- Nebraska — Landscaping
- Nebraska — Low Voltage
- Nebraska — Plumber
- Nebraska — Solar
- New Hampshire — Fire Sprinkler
- New Hampshire — Landscaping
- New Hampshire — Low Voltage
- New Jersey — Fire Sprinkler
- New Jersey — HVAC
- New Jersey — Landscaping
- New Jersey — Plumber
- New York — Carpentry
- New York — Fire Sprinkler
- New York — HVAC Technician
- New York — Landscaping
- New York — Masonry
- New York — Painting
- New York — Plumber
- New York — Roofing
- New York — Solar
- North Carolina — HVAC
- North Carolina — Landscaping
- North Carolina — Low Voltage
- North Carolina — Plumber
- North Dakota — Electrician
- North Dakota — Fire Sprinkler
- North Dakota — HVAC
- North Dakota — Landscaping
- North Dakota — Low Voltage
- North Dakota — Plumber
- Ohio — Landscaping
- Oklahoma — Landscaping
- Oklahoma — Low Voltage
- Oregon — Fire Sprinkler
- Oregon — General Contractor
- Pennsylvania — Electrician
- Pennsylvania — Fire Sprinkler
- Pennsylvania — HVAC
- Pennsylvania — Landscaping
- Pennsylvania — Plumber
- Pennsylvania — Solar
- Rhode Island — Electrician
- Rhode Island — Fire Sprinkler
- Rhode Island — Landscaping
- Rhode Island — Low Voltage
- Rhode Island — Solar
- South Dakota — Carpentry
- South Dakota — Electrician
- South Dakota — Fire Sprinkler
- South Dakota — HVAC
- South Dakota — Landscaping
- South Dakota — Low Voltage
- South Dakota — Plumber
- South Dakota — Solar
- Texas — Carpentry
- Texas — Fire Sprinkler
- Vermont — Carpentry
- Vermont — Fire Sprinkler
- Vermont — HVAC
- Vermont — Landscaping
- Vermont — Solar
- Washington — Carpentry
- Washington — Electrician
- Washington — Fire Sprinkler
- Washington — Landscaping
- Washington — Plumber
- Washington — Solar
- West Virginia — Electrician
- West Virginia — HVAC
- West Virginia — Low Voltage
- West Virginia — Plumber
- West Virginia — Pool Contractor
- Wisconsin — Carpentry
- Wisconsin — Landscaping
How exam scheduling works
- Apply to the state board first. Most providers will not allow you to schedule an exam until the board has approved your application and issued an Authorization to Test (ATT) letter. The ATT contains a candidate ID required to book the seat.
- Download the candidate information bulletin (CIB) from the provider portal. The CIB lists the exact reference materials (NEC edition, IBC edition, NASCLA business book) you may bring to the open-book portion.
- Schedule online. PSI, Prometric, and Pearson VUE all use real-time seat-selection systems. Booking 7–10 days out is normal in most metros; rural test centers may book 3–4 weeks ahead.
- Pay the provider directly. Exam fees are separate from the state application fee and are non-refundable on the day of the test if you do not show.
- Bring two forms of ID, your ATT letter, and the approved reference materials. The provider will deny entry without a primary government-issued photo ID.
- Receive a pass/fail score sheet at the test center. PSI and Prometric automatically transmit results to the state board within 24 hours.
Provider assignments change when state boards renew their testing contracts (typical cycle: 3–5 years). The directory above is generated from each state license page on this site and re-verified quarterly. Always confirm the current provider directly with the state board before paying any exam fee.