To get a contractor license in Oklahoma, you work through the Construction Industries Board (CIB) for one of four regulated trades — electrical, plumbing, mechanical (HVAC), or roofing — by documenting the required work hours, passing two PSI exams, securing a surety bond and liability insurance, and submitting a $330 application packet. If you plan to work as a general contractor rather than in one of those trades, Oklahoma does not issue a statewide license at all; you register with the city or county where you’ll be building.
Who Needs a State License and Who Doesn’t
Oklahoma only licenses four construction trades at the state level: electrical, plumbing, mechanical, and roofing. Electrical covers wiring and equipment for lighting, heating, and power. Plumbing covers water supply and waste piping. Mechanical covers heating, ventilation, air conditioning, and related systems. Roofing is handled through a separate registration system rather than a full trade license.
If you coordinate construction projects without personally doing electrical, plumbing, mechanical, or roofing work, you don’t need a CIB license. You deal with local government instead. Cities and counties set their own registration rules, usually a local fee plus proof of insurance or financial responsibility, and the requirements vary from one municipality to the next. Check with the building department where you plan to work. This catches people off guard when they move from states that license general contractors statewide.
The rest of this article walks through the licensing path for the three trades on the three-year cycle — electrical, plumbing, and mechanical — with roofing’s lighter registration system noted where it differs.
Step 1: Document the Required Work Hours
Experience is measured in verifiable hours worked under a licensed contractor, not in years. The CIB will reject applications with gaps in the work history, so keep records as you go.
Electrical
Electrical contractor licensing has three tiers, each with its own hour threshold:
- Unlimited Electrical Contractor: 12,000 verifiable hours total, including 4,000 hours as a licensed Unlimited Electrical Journeyman and 6,000 hours in commercial or industrial work under a licensed electrical contractor. Up to 2,000 hours of formal electrical education can substitute for work experience.
- Residential Electrical Contractor: 8,000 verifiable hours total, with 4,000 hours as a licensed Residential or Unlimited Journeyman Electrician working under a licensed contractor.
- Limited Electrical Contractor: a degree in electrical engineering plus 8,000 hours of field experience, or 16,000 hours of experience in field construction, estimating, or project management in commercial or industrial electrical work.1Oklahoma.gov. Electrical Contractor
Plumbing and Mechanical
For both plumbing and mechanical, you must first meet every requirement for a journeyman license in that trade, then add one more year of experience beyond the journeyman level before applying as a contractor.2Oklahoma.gov. Plumbing Contractor3Oklahoma.gov. Mechanical Contractor You can’t skip the apprentice and journeyman stages — you work through them, documenting hours at each level.
Roofing
Roofing uses a registration system under the Roofing Contractor Registration Act rather than a full trade license. Experience documentation and exam requirements are lighter, but insurance requirements are much higher (covered below).4Oklahoma.gov. Active Roofing Contractor Requirements
Step 2: Pass the PSI Exams
Oklahoma contracts with PSI Services LLC to administer all CIB trade exams. You take two tests: a trade-specific exam covering technical knowledge and code requirements, and a Business and Law exam on running a licensed construction operation. Both are computer-based, open-book, and require a 70% passing score.5Oklahoma.gov. PSI Candidate Information Bulletin
Open-book sounds forgiving, but the exams are timed and the code questions are specific enough that flipping through an unfamiliar codebook under pressure won’t save you. Knowing where to find answers quickly matters more than memorizing them. Candidates who fail often underestimate the Business and Law portion, which covers financial obligations, contract requirements, and the CIB’s enforcement authority.
Schedule your exams through PSI and pay the exam fee directly to PSI at that time. The CIB will not process your license application until you’ve passed both tests.
Step 3: Get Your Bond and Insurance in Place
Before you submit the application, you need to assemble a documentation packet. A missing item gets the whole packet returned.
Surety Bond
Active plumbing, electrical, and mechanical contractors must carry a $5,000 corporate surety bond payable to the Oklahoma Construction Industries Board. It must include original signatures, seals, and a Power of Attorney attachment, and it must come from an authorized surety company. Personal bonds and cash deposits are not accepted.6Oklahoma.gov. Active Contractor Requirements Roofing contractors don’t need a surety bond.
General Liability Insurance
Minimums vary sharply by trade. Electrical, plumbing, and mechanical contractors need at least $50,000 in commercial general liability coverage.6Oklahoma.gov. Active Contractor Requirements Roofing contractors face a much higher bar: $500,000 for residential work and $1,000,000 for commercial projects.4Oklahoma.gov. Active Roofing Contractor Requirements Your certificate of insurance must name the Construction Industries Board as the certificate holder.
Workers’ Compensation
If you have employees, you need workers’ compensation insurance. A sole proprietor with no employees can file an affidavit of exemption under Oklahoma’s Workers’ Compensation Act, but that exemption only applies to natural persons. LLCs, corporations, and partnerships cannot claim it regardless of employee count.
Business Identifiers
Your application must include your registered business name, a Social Security number or Federal Employer Identification Number (EIN), and the detailed work history documenting your experience hours. An EIN is free from the IRS online and takes minutes; don’t pay a third-party site for one.7Internal Revenue Service. Get an Employer Identification Number If you’re forming an LLC or corporation, complete your state entity filing before applying for the EIN.
Step 4: Submit the Application and Pay the Fees
Contractor fees come in two parts: a $30 application fee and a $300 initial license fee, for a total of $330. For reference, journeyman applicants pay $25 for the application and $50 for the initial license, and apprentice registration is $25 total.8Legal Information Institute. Oklahoma Admin Code 158:30-9-2 – Fee Schedule for Contractors Exam fees are separate and go directly to PSI.
Submit the completed packet to the CIB office at 2401 NW 23rd Street, Suite 2F, Oklahoma City, OK 73107. You can mail it or use the 24/7 drop box on the south sidewalk. Payment must be by personal check or money order; the CIB does not accept credit cards for initial applications.9Oklahoma.gov. Construction Industries Board Contact The CIB runs an online portal for renewals, but initial applications still appear to require paper submission.
Renewal and Continuing Education
Electrical, plumbing, and mechanical contractor licenses renew on a three-year cycle. Renewal costs $200, with a $100 late fee if you miss the deadline.8Legal Information Institute. Oklahoma Admin Code 158:30-9-2 – Fee Schedule for Contractors Each renewal period requires six hours of CIB-approved continuing education, based on the current National Electrical Code or the relevant trade code. CE courses are available online or in person through approved providers.
Roofing contractor registrations renew every year rather than every three.4Oklahoma.gov. Active Roofing Contractor Requirements
Letting a license lapse is a bigger problem than people realize. Working on an expired license carries the same penalties as working without one at all, and reactivation often involves more paperwork than renewing on time.
Reciprocity for Out-of-State Electricians
Oklahoma has reciprocal journeyman electrician agreements with ten states: Alaska, Arkansas, Colorado, Idaho, Iowa, Montana, Nebraska, South Dakota, Texas, and Wyoming. If you hold an active journeyman electrical license in one of those states, you can apply for an Oklahoma journeyman license without retaking the full exam.10Oklahoma.gov. Guidelines for Electrical License Through Reciprocity
Two conditions apply. You must have held the out-of-state license for at least one year, and it cannot be a grandfathered license — you had to earn it through the normal testing and experience process. Reciprocity also applies only at the journeyman level. Moving from a reciprocal journeyman license up to an Oklahoma contractor license still means meeting the full contractor experience thresholds and passing the contractor exams.
The CIB does not publish reciprocity agreements for plumbing or mechanical trades on the same basis. If you hold an out-of-state license in either trade, contact the CIB directly to ask about your options.
Working Without a License
Performing licensed trade work without proper credentials is a misdemeanor in Oklahoma. For the mechanical trade, conviction carries a fine between $200 and $1,000, with potential jail time, and the CIB can add administrative fines of up to $500 per violation. Each day of unlicensed work counts as a separate offense, up to a $1,000 maximum.11Oklahoma.gov. Mechanical Licensing Act Electrical and plumbing violations carry similar penalty structures under their respective acts. Failing to register as a roofing contractor is a misdemeanor punishable by a fine of up to $500, enforced through the district attorney’s office.4Oklahoma.gov. Active Roofing Contractor Requirements
Beyond the criminal penalties, unlicensed work can void your insurance coverage, expose you personally to liability for injuries or property damage, and make it nearly impossible to collect payment through the courts if a client disputes your invoice.