Important exam update: the current official PSI Candidate Information Bulletin effective September 11, 2026 lists a 75% passing score for the Oklahoma Plumbing Business and Law examination. Candidates should use the official PSI bulletin as the final authority if older prep or marketing material shows a different passing score.
What Is the Oklahoma Plumbing Business and Law Contractor Exam?
The Oklahoma Plumbing Business and Law exam is the business-side examination required as part of the plumbing contractor licensing process administered by the Oklahoma Construction Industries Board.
It is separate from the Plumbing Contractor and Natural Gas trade examination. The trade test asks whether you understand plumbing systems, codes, gas piping, drainage, vents, fixtures, water supply, and technical installation. Business and Law asks whether you understand the responsibilities of operating a contracting business.
That includes estimating jobs, managing projects, understanding contracts, handling company finances, supervising employees, maintaining insurance and bonds, managing payroll taxes, understanding lien issues, and following Oklahoma plumbing licensing requirements.
Exam: Oklahoma Plumbing Business and Law.
Questions: 50 scored items.
Time: 120 minutes.
Passing score: 75% under the current official PSI bulletin.
Format: open book.
The Oklahoma Plumbing Business and Law Online Exam Prep Course provides structured business, financial, legal, project-management, and licensing review for contractor candidates preparing for this examination.
Oklahoma Plumbing Contractor Licensing Path
The Business and Law test is one piece of a larger contractor licensing process.
| Step | Requirement | What to Verify |
|---|---|---|
| Journeyman-Level Qualification | Meet the Oklahoma journeyman experience requirements | Generally three years of qualifying plumbing trade experience, military equivalent, or an accepted out-of-state license route |
| Additional Contractor Experience | Gain one additional year of qualifying plumbing trade experience | Contractor applicants must meet journeyman requirements plus an additional year |
| Plumbing Trade Examination | Pass the applicable Oklahoma plumbing contractor trade examination | Current PSI trade-exam classification, code cycle, passing score, and references |
| Plumbing Business & Law | Pass the separate contractor Business and Law examination | 50 scored questions, 120 minutes, 75% passing, open book |
| Bond and Insurance | Maintain required financial responsibility for active contractor status | $5,000 bond or approved equivalent and minimum $50,000 general liability insurance under current plumbing rules |
| License Maintenance | Renew and maintain active contractor status | Continuing education, bond, insurance, renewal, display, apprentice, and compliance requirements |
Research Authority and Verification
The current Oklahoma CIB licensing pages, PSI Candidate Information Bulletin, plumbing rules, and 1 Exam Prep materials were compared before building this page.
| Verified Point | Authority | Research Result |
|---|---|---|
| Exam administrator | Oklahoma Construction Industries Board / PSI | CIB determines eligibility and PSI administers the licensing examinations |
| Business and Law exam | PSI Candidate Information Bulletin effective September 11, 2026 | 50 scored questions, 120 minutes, 75% passing, open book |
| Contractor experience | Oklahoma CIB Plumbing Contractor guidance | Contractor applicants meet journeyman requirements plus one additional year of plumbing trade experience |
| Bond requirement | Oklahoma Plumbing Industry Regulations | Active plumbing contractors generally maintain a $5,000 surety bond or approved equivalent |
| Insurance requirement | Oklahoma Plumbing Industry Regulations | Minimum general liability policy of $50,000 for active plumbing contractor status |
| Continuing education | Oklahoma Plumbing Industry Regulations | Journeymen and contractors generally complete 6 hours of approved CE every 36 months, subject to current exemptions and rules |
Oklahoma Plumbing Business and Law Exam Breakdown
The current official PSI outline contains eight scored subject areas. Bidding and Estimating is the largest category with 10 questions. Financial topics follow with 8 questions, while Project Management and Supervision contains 7.
Payroll and Payroll Taxes contains 6 questions. Contracts, Labor and Personnel, and Licensing Requirements each contain 5 questions. Risk Management contains 4 questions.
That means the exam is not simply a plumbing-law quiz. A large part of the test is about running a contracting company: preparing bids, supervising work, managing money, understanding agreements, handling employees, protecting the company from risk, and complying with Oklahoma licensing rules.
Primary SEO Target
Oklahoma Plumbing Business and Law Contractor Exam Prep
Licensing Authority
Oklahoma Construction Industries Board
Exam Administrator
PSI
Exam Questions
50 scored items
Exam Time
120 minutes
Passing Score
75% under the current official PSI bulletin
Exam Format
Open book
Largest Category
Bidding and Estimating, 10 questions
Primary Business Reference
NASCLA Contractors Guide to Business, Law and Project Management, Basic 14th Edition
Oklahoma-Specific Study
Plumbing License Law, Industry Regulations, Fine Schedule, Lien Law, Workers' Compensation, and CIB study aids
How to Study for the Oklahoma Plumbing Business and Law Exam
Do not study this like a plumbing-code exam. The questions are built around business decisions, contractor responsibilities, Oklahoma law, and reference navigation.
NASCLA topics: bidding, estimating, project management, contracts, financial management, labor, insurance, bonds, payroll, taxes, and business organization.
Oklahoma topics: plumbing licensing law, plumbing industry regulations, lien law, workers' compensation, CIB fines, renewal, insurance, bonds, and regulatory compliance.
Open-book skill: learn which book is most likely to contain the answer before you start turning pages.
Contractor Business Math and Financial Strategy
Business and Law includes financial topics, so plumbing contractors should be comfortable with more than pipe measurements. You may need to understand estimates, cash flow, accounts receivable, accounts payable, financial statements, taxes, financing, and financial ratios.
Oklahoma Plumbing Business and Law exam-prep illustration for bidding, financial management, taxes, liens, and licensing.
- Bidding: understand labor, materials, equipment, overhead, markup, scope, and bid documentation
- Cash Flow: recognize money coming into and leaving the business and why timing matters
- Receivables and Payables: understand amounts customers owe versus amounts the company owes
- Financial Statements: review balance sheets and income statements
- Payroll: study payroll taxes, forms, due dates, and employer responsibilities
- Insurance and Bonds: understand contractor risk management and licensing-related financial responsibility
- Liens: review Oklahoma lien concepts and the contractor's role in protecting payment rights
Your Oklahoma Plumbing Contractor Licensing Roadmap
Move from plumbing trade experience through contractor eligibility, PSI testing, and active contractor licensing.
1
Build qualifying plumbing experience
Work in the plumbing trade under the applicable licensing structure and keep verifiable records of your experience.
2
Meet journeyman-level requirements
Oklahoma journeyman applicants generally need three years of qualifying plumbing experience, an accepted military equivalent, or another qualifying route.
3
Complete the additional contractor experience
Contractor applicants meet the journeyman requirements plus an additional year of plumbing trade experience, subject to current substitutions and CIB rules.
4
Apply through the Oklahoma CIB
The Construction Industries Board reviews your application and determines whether you are eligible to sit for the required examinations.
5
Prepare for Plumbing Business and Law
Study bidding, project management, contracts, finance, labor, risk management, payroll taxes, licensing, and Oklahoma-specific laws and regulations.
6
Pass the required PSI exams
Plumbing contractor applicants must complete the applicable plumbing trade examination and the separate Plumbing Business and Law examination.
7
Provide bond and insurance
To maintain active contractor status, satisfy the current CIB bond and liability-insurance requirements.
8
Maintain the license
Keep your license active through renewal, continuing education, bond and insurance maintenance, and compliance with Oklahoma plumbing rules.
Oklahoma Plumbing Business and Law Exam Weighting
The bars below compare the 50 scored questions in the current official PSI content outline.
Bidding and Estimating
10 questions
Financial
8 questions
Project Management and Supervision
7 questions
Payroll and Payroll Taxes
6 questions
Contracts
5 questions
Labor and Personnel
5 questions
Licensing Requirements
5 questions
Risk Management
4 questions
Study priority: bidding, financial management, and project supervision account for half of the 50 scored questions. The Oklahoma-specific law and licensing references remain important because they control state-specific contractor obligations.
Oklahoma Plumbing Business and Law Exam References
The current PSI bulletin lists multiple approved references. Build familiarity with all of them before exam day.
| Reference | Primary Study Use | Important Note |
|---|---|---|
| NASCLA Contractors Guide to Business, Law and Project Management | Estimating, business organization, contracts, finance, project management, labor, insurance, bonds, and contractor operations | Current PSI list identifies the Basic 14th Edition |
| Oklahoma Plumbing License Law of 1955 | Oklahoma plumbing licensing statutes and contractor responsibilities | Oklahoma Statutes, Title 59, Chapter 27 |
| Oklahoma Plumbing Industry Regulations | Licensing procedures, contractor rules, experience, insurance, bonds, apprentices, journeymen, and compliance | Oklahoma Administrative Code, Title 158, Chapter 30 |
| Oklahoma CIB Fine Schedule | Violations, fines, enforcement, and compliance | Oklahoma Administrative Code, Title 158, Chapter 10 |
| Oklahoma Lien Law | Construction liens, payment protection, and contractor legal responsibilities | Oklahoma Statutes, Title 42, Chapter 3 |
| Oklahoma Workers' Compensation Act | Workers' compensation responsibilities and labor compliance | Oklahoma Statutes, Title 85A, Chapter 1, or approved statutory excerpts |
| CIB Unofficial Administrative Rules & Courtesy Exam Study Aids Book | Oklahoma CIB rules and exam-study support | Use the current edition |
How to Prepare for the Oklahoma Open-Book Business and Law Exam
Build these exam-prep habits
- Practice with the current PSI-listed references
- Learn which book controls each major subject
- Use permitted highlighting and underlining before exam day
- Use permanent tabs to organize major reference sections
- Practice timed reference-navigation drills
- Review Oklahoma-specific licensing and lien rules
- Complete full 120-minute practice sessions
Avoid these exam-prep mistakes
- Assuming open book means the exam is easy
- Studying only the NASCLA guide and ignoring Oklahoma law
- Using temporary Post-it style tabs
- Adding handwritten notes to exam references
- Bringing unauthorized loose papers
- Spending too long searching one book
- Using an old passing score instead of the current PSI bulletin
Oklahoma Plumbing Business and Law vs Plumbing Trade Exam
The Business and Law exam and the plumbing trade exam serve different purposes. Plumbing contractors need both business knowledge and technical plumbing knowledge.
The Plumbing Contractor and Natural Gas trade examination focuses on plumbing systems, sanitary drainage, vents, water supply, fixtures, piping, gas systems, safety, isometric analysis, and technical code application.
The Plumbing Business and Law examination focuses on running the contracting business. The questions involve estimates, contracts, financial management, supervision, employees, insurance, bonds, payroll, taxes, liens, and licensing compliance.
Being excellent at plumbing does not automatically make the business exam easy. A contractor can size a drain correctly and still need to know what a balance sheet is. The exam would be delighted to remind you of that.
Oklahoma Plumbing Contractor Exam Comparison
Know which examination you are preparing for before choosing books or practice questions.
| Exam / Requirement | Main Purpose | Important Difference |
|---|---|---|
| Plumbing Business & Law | Business, legal, financial, project-management, labor, and licensing knowledge | 50 scored questions, 120 minutes, 75% passing under the current PSI bulletin |
| Plumbing Contractor & Natural Gas Trade Exam | Technical plumbing and natural-gas knowledge | Separate examination with its own code references, content outline, and transition schedule |
| Journeyman Qualification | Establish qualifying plumbing trade experience | Contractor applicants must first satisfy the applicable journeyman-level requirements |
| Contractor Experience | Additional trade experience beyond journeyman qualification | Current CIB guidance requires one additional year for contractor applicants |
| Active Contractor Requirements | Keep the contractor license active and compliant | Bond, liability insurance, renewal, continuing education, and other requirements apply |
Oklahoma Plumbing Contractor Licensing Requirements
Experience Candidate
Build Verifiable Trade Experience
- Be at least 18 years old for journeyman examination eligibility
- Generally complete three years of qualifying plumbing experience
- Use accepted military or out-of-state routes where applicable
- Keep employer and work-history documentation
- Review educational substitutions approved by Oklahoma
- Add the required contractor-level experience
Business & Law Candidate
Contractor Business Exam Focus
- 50 scored questions
- 120-minute time limit
- 75% current official passing score
- Open-book format
- Eight scored subject categories
- Oklahoma and NASCLA references
Active Plumbing Contractor
Maintain the License
- Maintain required $5,000 bond or approved equivalent
- Maintain minimum $50,000 general liability insurance
- Keep CIB listed as certificate holder where required
- Complete required continuing education
- Renew the license on time
- Follow Oklahoma contractor compliance rules
Six-Week Oklahoma Plumbing Business and Law Exam Prep Plan
Build business knowledge and open-book reference speed in focused weekly blocks.
Week 1
Exam Setup + References
- Review PSI bulletin
- Gather current references
- Organize permanent tabs
- Learn which topics belong in each book
- Take a diagnostic practice test
Week 2
Bidding + Project Management
- Estimating basics
- Bid preparation
- Scheduling
- Budget control
- Quality and material control
Week 3
Contracts + Liens
- Contract terminology
- Contract types
- Change orders
- Warranties
- Oklahoma lien concepts
Week 4
Financial Management
- Business organization
- Cash flow
- Receivables and payables
- Balance sheets
- Income statements and ratios
Week 5
Labor + Risk + Payroll
- Workers' compensation
- Labor standards
- Insurance and bonds
- Payroll taxes
- Forms and due dates
Week 6
Licensing + Full Simulation
- Oklahoma plumbing law
- Industry regulations
- CIB fine schedule
- 120-minute practice exam
- Review every missed question
How Hard Is the Oklahoma Plumbing Business and Law Exam?
The Business and Law exam can surprise experienced plumbers because the hardest questions may have nothing to do with installing plumbing. You are being tested as a future contractor and business operator.
The exam is open book, but candidates have only 120 minutes for 50 scored questions. That gives you a little over two minutes per scored question on average. If every question turns into a slow search across six different books, the clock becomes a serious problem.
The strongest candidates learn the concepts first and use the references to confirm details. They also know whether a question belongs in the NASCLA guide, plumbing law, plumbing regulations, lien law, workers' compensation material, or the CIB fine schedule before opening a book.
Oklahoma Plumbing Business and Law Exam Day Checklist
Do this
- Confirm your PSI appointment and exam title
- Bring valid required identification
- Bring the current approved references
- Use only permanent tabs and permitted markings
- Bring an allowed silent non-printing non-programmable calculator if desired
- Know which reference controls each subject
- Use a steady 120-minute pacing plan
Do not do this
- Use temporary Post-it notes
- Bring unauthorized loose papers
- Write in references before or during the exam if prohibited by current PSI rules
- Study only general NASCLA topics
- Ignore Oklahoma plumbing laws and regulations
- Spend too long on one reference lookup
- Rely on an outdated passing score
Oklahoma Plumbing Business and Law Contractor Exam Prep Options
Complete Pass Package
Books + Course + Flash Cards
- Highlighted and tabbed NASCLA Business reference
- Highlighted and tabbed Oklahoma plumbing law materials
- Oklahoma CIB Fine Schedule
- Workers' Compensation and Lien Law materials
- NASCLA Business flash cards
- Online Oklahoma Business & Law course
Online Exam Prep Course
Structured Business & Law Training
- Bidding and estimating review
- Project management
- Contracts
- Financial management
- Labor, payroll, and risk management
- Oklahoma licensing preparation
Highlighted & Tabbed Book Package
Reference Navigation Preparation
- Oklahoma Plumbing License Law
- Oklahoma Plumbing Industry Regulations
- CIB Fine Schedule
- Oklahoma Lien Law
- NASCLA Business Guide
- Highlighted and permanently tabbed preparation
Passing-score reminder: some 1 Exam Prep product-page text currently displays 70%. The official PSI Candidate Information Bulletin effective September 11, 2026 lists 75% for Oklahoma Plumbing Business and Law, so use the official PSI score for current exam planning.
Prepare for Oklahoma Plumbing Business and Law with the Correct References
This Oklahoma-specific package is designed around the business and legal responsibilities of plumbing contractors.
• The current official PSI exam contains 50 scored questions
• Candidates receive 120 minutes
• The current official passing score is 75%
• The examination is open book
• Bidding and Estimating is the largest category with 10 questions
• Oklahoma-specific plumbing law and regulations are part of the reference list
• The NASCLA Basic 14th Edition guide supports contractor business topics
• Permanent reference tabs are allowed, while temporary tabs are prohibited under current PSI rules
Practice with the same books you plan to use on exam day, because open-book success depends heavily on knowing where information lives.
Frequently Asked Questions
Oklahoma Plumbing Business and Law Exam
The current official PSI bulletin lists 50 scored questions.
Candidates currently receive 120 minutes, or two hours, to complete the Oklahoma Plumbing Business and Law examination.
The current official PSI Candidate Information Bulletin effective September 11, 2026 lists a 75 percent passing score for the Oklahoma Plumbing Business and Law exam.
Yes. The current PSI bulletin lists the exam as open book. Candidates are responsible for bringing approved references and following PSI's rules for tabs, markings, and loose materials.
The Oklahoma Construction Industries Board determines examination eligibility, and PSI administers the licensing examinations after candidates have been approved.
Exam Content
Bidding and Estimating is currently the largest category with 10 scored questions.
The current official outline assigns 8 questions to Financial topics such as business organization, accounting methods, cash flow, receivables, payables, financial statements, financing, and ratios.
Yes. Contracts account for 5 scored questions and can include terminology, contract types, change orders, standardized documents, warranties, interpretation, and other obligations.
Yes. Payroll and Payroll Taxes currently account for 6 scored questions, including taxes, forms, and due dates.
Yes. Oklahoma-specific licensing law, plumbing industry regulations, lien law, workers' compensation material, and CIB compliance references are part of the approved Business and Law reference structure.
Exam References
The current PSI bulletin lists the NASCLA Contractors Guide to Business, Law and Project Management, Basic 14th Edition.
Yes. Current PSI rules allow approved references to be highlighted and underlined before the examination session.
Yes, but current PSI rules allow permanent tabs only. Temporary tabs such as Post-it notes are not allowed.
Current PSI rules state that references may not be written in prior to or during the examination session. Additional loose papers are also prohibited.
Plumbing Contractor Licensing
Current Oklahoma CIB guidance states that contractor applicants meet the same requirements as journeyman applicants and also complete one additional year of plumbing trade experience. The common journeyman experience route is three years, so this generally creates a four-year experience path, subject to approved substitutions and alternate qualification routes.
Active plumbing contractors generally must maintain a $5,000 corporate surety bond or an approved equivalent arrangement under the current Oklahoma plumbing rules.
Current Oklahoma plumbing regulations require a certificate showing at least $50,000 in general liability insurance for active contractor status, subject to the current rule details and exceptions.
Current Oklahoma plumbing rules generally require contractors and journeymen to complete at least 6 hours of approved continuing education every 36 months, subject to the current exemptions and timing rules.
1 Exam Prep
The current package includes highlighted and tabbed business and Oklahoma law references, the NASCLA Business reference, Oklahoma plumbing licensing materials, CIB fine-schedule material, workers' compensation and lien references, NASCLA-based flash cards, and an online Oklahoma Plumbing Business and Law exam prep course.
Yes. 1 Exam Prep offers a separate Oklahoma Plumbing Business and Law Contractor online practice-question product for candidates who want additional timed review without purchasing the full book package.
Some current product-page copy appears to contain an older 70 percent figure. The official PSI Candidate Information Bulletin effective September 11, 2026 lists 75 percent for Oklahoma Plumbing Business and Law, so candidates should use the current official PSI bulletin as the final authority.
Watch: Oklahoma Plumbing Business and Law Exam Prep
Watch this related 1 Exam Prep Oklahoma Plumbing Business and Law video for an introduction to contractor exam preparation, simulated testing, business-reference review, and the study approach used for Oklahoma plumbing contractor candidates.
Current-score reminder: use the video for study strategy and course context, but use the latest official PSI bulletin for current examination details. As of the current September 11, 2026 bulletin, Plumbing Business and Law requires 75% to pass.
Oklahoma Plumbing Business and Law Contractor Exam Prep Resources
Combine the official Oklahoma CIB and PSI information with structured 1 Exam Prep materials. Recheck the current PSI bulletin shortly before testing because examination requirements and reference information can change.
Oklahoma Complete Pass Package
Oklahoma Business & Law Online Course
Highlighted & Tabbed Book Package
Online Practice Questions
Business & Law Book Package
Plumbing Contractor Ultimate Rental Package
Oklahoma CIB Plumbing Contractor Requirements
Oklahoma CIB Testing Information
Current Oklahoma PSI Candidate Bulletin
Contact 1 Exam Prep
Ready for Oklahoma Plumbing Business and Law Contractor Exam Prep?
Build stronger bidding, estimating, project-management, contract, financial, labor, risk-management, payroll, tax, lien, and Oklahoma plumbing licensing knowledge while developing the open-book reference speed you need for the PSI examination.
Questions? Call 877-775-9400
or email sales@1examprep.com
Oklahoma Plumbing Business & Law Exam Prep
- Choosing a selection results in a full page refresh.
- Opens in a new window.