Plumber License Requirements in Oklahoma
| Licensing Authority | Oklahoma Construction Industries Board (CIB) |
| License Type | Journeyman / Plumbing Contractor |
| Experience Required | Journeyman: completion of a 4-year plumbing apprenticeship or 8,000 hours of supervised experience under a licensed plumbing contractor. |
| Exam Required | Yes — Plumbing Trade Exam + Business and Law Exam |
| Bond Required | Yes — $5,000 |
| Insurance | General liability: required. Workers comp: required with employees |
| Continuing Education | 6 hours every 3 years |
| Processing Time | 4-6 weeks |
Fee Breakdown
| Application Fee | $65 |
| Exam Fee | $90 |
| Initial License Fee | $115 |
| Est. Initial Total | $270 |
Related & additional fees
Separate or ongoing costs — not included in the estimate above.
| Contractor license fee | $330 |
| Contractor renewal | $200 |
Renewal: $75 every 3 years
Exam Requirements
Plumbing Trade Exam
Business and Law Exam
Exam provider: PSI
Recommended exam prep
Formal prep pays for itself against a $100+ retake. Many states examine contractors on two separate papers — the trade exam and a business and law exam — so we list the course covering both first, with trade-specific depth after.
Some links below are affiliate links. If you buy through them we may earn a commission at no extra cost to you.
Mometrix · SponsoredContractor License Online Study CourseFull online prep course covering the trade and business-and-law exams — video lessons, practice questions, and a study plan built for a first-try pass.See the course →
Mometrix · SponsoredPlumber's Exam Secrets Study GuideCovers plumbing code, systems, and installation for the journeyman and master plumber exams — organized topic reviews plus practice questions for a first-try pass.See the study guide →
Mometrix · SponsoredPlumber's Exam FlashcardsPortable flashcards for the high-frequency plumber-exam topics — a cheaper add-on for drilling code references and terms on the go.See the flashcards →Set up the business before you apply in Oklahoma
Most states license the company as well as the person, so the application usually asks for an LLC or corporation and a registered agent in Oklahoma. Northwest forms the entity and acts as your registered agent — a flat fee, no upsell funnel.
Some links below are affiliate links. If you buy through them we may earn a commission at no extra cost to you.
Form an LLC with Northwest→License Tiers
Apprentice
Entry level — must work under supervision
Exam: Not required
Journeyman Plumber
8,000 hours (approx. 4 years) supervised experience
Exam: Required
Plumbing Contractor
Journeyman license plus business qualifications
Exam: Required
You're licensed in Oklahoma as a plumber — the next 30 days
Most of the steps below are required before your first paid job; the order is the order the state and its counties will ask for them.
Some links below are affiliate links. If you buy through them we may earn a commission at no extra cost to you.
Form the business and get an EIN.
The Oklahoma Construction Industries Board issues the Journeyman / Plumbing Contractor; the business that invoices Oklahoma customers is a separate decision. A sole proprietorship is the default, an LLC keeps business liability off your personal assets, and either needs an EIN before the first payroll. Settle it before the license number goes on an estimate.
Post the bond.
Oklahoma requires a $5,000 surety bond. Active plumbing contractors must carry a $5,000 corporate surety bond payable to the Oklahoma CIB. How contractor bonds work→
Carry the insurance the license requires.
Oklahoma requires general liability insurance for this license. Active contractors must maintain minimum $50,000 commercial general liability insurance. Workers' compensation is required once you hire employees. Contractor insurance requirements→
Set up quoting, scheduling and invoicing before the first call.
Your first customers will ask for a written estimate and expect to pay by card on site. Most one-truck plumber businesses run that on field-service software; Housecall Pro is the one we link because it is built for this size of company and this link carries 20% off your first 12 months. Start a free trial of Housecall Pro→
Keep the license.
Renewal is every 3 years at $75. Continuing education: 6 hours every 3 years.
Other licenses in Oklahoma
- General Contractor license in Oklahoma
No statewide license — check local requirements
- Electrician license in Oklahoma
Statewide license required · $195 in initial government fees · CIB
- HVAC Technician license in Oklahoma
Statewide license required · $420 in initial government fees · CIB
- Roofing Contractor license in Oklahoma
Statewide registration, not a license · $75 in fees · CIB
Frequently Asked Questions
Do I need a plumber license in Oklahoma?
Yes, Oklahoma requires a statewide plumber license through the Oklahoma Construction Industries Board.
How much does a plumber license cost in Oklahoma?
The estimated initial cost is $270, including application, exam, and license fees. A $5,000 surety bond is also required.
What experience do I need for a plumber license in Oklahoma?
Journeyman: completion of a 4-year plumbing apprenticeship or 8,000 hours of supervised experience under a licensed plumbing contractor.
What exams are required for a plumber license in Oklahoma?
You must pass the Plumbing Trade Exam and Business and Law Exam exams. A passing score of 75% is required. Exams are administered by PSI.
Do I need a bond for a plumber license in Oklahoma?
Yes, a $5,000 surety bond is required. Active plumbing contractors must carry a $5,000 corporate surety bond payable to the Oklahoma CIB
How long does it take to get a plumber license in Oklahoma?
Processing time is typically 4-6 weeks after submitting a complete application.
Is continuing education required for plumbers in Oklahoma?
Yes, 6 hours per every 3 years is required for license renewal.
Next steps
You know the requirements for plumbers in Oklahoma— here's how to actually pass and apply.
Data last verified: 2026-04-02 | Source: CIB