Oklahoma Plumbing Business and Law

Oklahoma Plumbing Business and Law Exam: Complete Study Guide (2026)

To earn your Oklahoma Plumbing License, you must pass two exams: the trade exam and the Business and Law exam. Many candidates focus heavily on the technical side and underestimate the Business and Law portion — a mistake that costs real money and weeks of waiting to retest. This guide covers everything you need to know about the Oklahoma Plumbing Business and Law exam: the format, topic breakdown, what to study, approved references, and how to register. Work through it systematically and you will walk into the test center prepared.

Oklahoma Plumbing Business and Law Exam Overview

The exam is administered by PSI and consists of 50 scored questions with a 120-minute time limit. To pass, you must answer 75% correctly — that means 38 of 50 questions. The exam is open book, which sounds reassuring, but candidates who rely on flipping through references without solid preparation routinely run out of time.

For scheduling, visit the exam registration page or call PSI at (855) 834-8750. You'll need your OK Con ID number from the Oklahoma Construction Industries Board to create your account. The exam fee is $92 per portion, and that fee is non-refundable and non-transferable whether you're testing for the first time or retaking.

Once the Board approves your application, your eligibility does not expire — there is no deadline to schedule. For full details, consult the official exam bulletin.

Topics Covered on the Oklahoma Plumbing Business and Law Exam

The exam covers eight topic areas. Study time should be allocated based on how heavily each area is weighted on the real exam:

• Bidding and Estimating (10 items) — Quantity take-off methods, labor cost and burden calculations, overhead and markup, bid ethics (shopping, peddling, rigging), and bid document requirements. This is the single heaviest topic — prioritize it.
• Financial (8 items) — Balance sheets, income statements, cash flow statements, bookkeeping, financial ratios (liquidity, quick, debt, profitability, activity), and contract accounting methods including percentage of completion.
• Project Management and Supervision (7 items) — Scheduling methods (bar chart, CPM), project life cycle phases, supervisory roles, and progress tracking through daily and status reports.
• Payroll and Payroll Taxes (6 items) — FICA, federal income tax withholding, FUTA, gross-to-net pay calculations, deposit schedules, and employer tax forms (W-2, W-3, W-4, Form 941, Form 940).
• Contracts (5 items) — Elements of a binding contract, contract types (lump-sum, unit-price, cost-plus, turnkey, fast-track), contract provisions, breach and liquidated damages, and progress payments with retainage.
• Labor and Personnel (5 items) — Oklahoma workers' compensation coverage requirements, employer and subcontractor liability, disability benefit types and calculations, anti-retaliation protections, and FLSA wage and overtime rules.
• Licensing Requirements (5 items) — License categories (unlimited vs. residential), eligibility and experience requirements, apprentice supervision ratios, exam procedures, and renewal timelines.
• Risk Management (4 items) — Insurance types (general liability, property, auto, workers' comp), surety bond requirements under Oklahoma CIB rules, bond types (bid, performance, payment, maintenance, fidelity), and subcontractor insurance obligations.

Sample Questions

The following questions are representative of what you'll encounter on the Oklahoma Plumbing Business and Law exam. Work through them — but the correct answers are not listed here. Take the free practice exam to check your reasoning.

Question 1 — Licensing Requirements
You are a plumbing contractor applying for the contractor license examination. You already have three years of plumbing trade experience working for a licensed contractor. How much total experience is required before you are eligible to sit for the contractor examination?
- A) Five years
- B) Four years
- C) Two years plus an associate degree
- D) Three years

Question 2 — Licensing Requirements
What distinguishes an unlimited plumbing contractor license from a residential plumbing contractor license in terms of the scope of work permitted?
- A) An unlimited contractor may only work on commercial projects, while a residential contractor may work on any dwelling
- B) An unlimited contractor may engage in plumbing business without category restrictions, while a residential contractor is limited to detached one- or two-family dwellings and townhouses not more than three stories in height
- C) An unlimited contractor is exempt from bonding requirements, while a residential contractor must carry a bond
- D) An unlimited contractor may hire unlimited apprentices, while a residential contractor may hire only one

Question 3 — Labor and Personnel
Under Oklahoma workers' compensation law, an injured employee who is temporarily totally disabled is entitled to receive compensation equal to _____ percent of the employee's average weekly wage.
- A) 60
- B) 66⅔
- C) 70
- D) 80

Question 4 — Labor and Personnel
Under Oklahoma workers' compensation law, the maximum duration for permanent partial disability compensation for the body as a whole is ______ weeks.
- A) 156
- B) 300
- C) 350
- D) 500

Question 5 — Payroll and Payroll Taxes
An employer is generally liable for both state and federal unemployment taxes if wages totaling what amount or more are paid to employees in any quarter of a calendar year?
- A) $1,500
- B) $1,000
- C) $2,500
- D) $500

These questions test your ability to recall specific thresholds, statutory percentages, and regulatory distinctions — not just general concepts. That precision is what separates passing candidates.

What Types of Questions to Expect

Here is a breakdown of the question types by topic area, along with the number of practice questions available in our question bank:

• Bidding and Estimating (62 practice questions) — Expect calculations: labor burden rates, overhead percentages, markup for profit margin, and quantity take-offs. You'll also see scenario-based questions on bid ethics — identifying bid shopping, peddling, and rigging situations.
• Project Management and Supervision (32 practice questions) — Questions covering CPM scheduling terminology (float time, activity duration, task sequences), supervisory role definitions, and project life cycle phase distinctions.
• Contracts (38 practice questions) — Identifying contract types from descriptions, determining whether a breach is material or immaterial, calculating retainage, and recognizing required contract elements.
• Financial (6 practice questions) — Reading and interpreting balance sheets and income statements, applying financial ratios, and distinguishing between accounting methods such as completed contract vs. percentage of completion.
• Labor and Personnel (59 practice questions) — Oklahoma workers' compensation benefit calculations (temporary total disability rates, maximum duration limits), employer vs. subcontractor liability rules, and FLSA overtime thresholds.
• Risk Management (50 practice questions) — Identifying appropriate bond types for specific situations, matching insurance coverage types to scenarios, and applying CIB bonding requirements for plumbing contractors.
• Payroll and Payroll Taxes (38 practice questions) — Gross-to-net paycheck calculations, FICA and FUTA rate applications, deposit schedule rules (monthly vs. semiweekly thresholds), and identifying the correct employer tax form for a given situation.
• Licensing Requirements (53 practice questions) — Experience requirements for journeyman and contractor licensure, apprentice-to-journeyman supervision ratios, exam passing score thresholds, and license renewal procedures.

Our full question bank contains 338 practice questions across all eight topic areas.

Study Materials for the Oklahoma Plumbing Business and Law Exam

This exam is open book, and the reference materials you bring are part of your preparation strategy — not a safety net for unprepared candidates. Approved references include:

• State of Oklahoma CIB Unofficial Administrative Rules & Courtesy Exam Study Aids Book (free at the CIB office)
• Oklahoma Plumbing License Law of 1955
• Oklahoma Plumbing Industry Regulations
• Oklahoma Fine Schedule
• Oklahoma Lien Law
• NASCLA Contractors Guide to Business Law and Project Management, Basic 14th Edition
• Oklahoma Workers' Compensation Act (or Statutory Excerpts)

References may be highlighted and tabbed, but permanent tabs only — Post-It notes and other temporary tabs are not allowed. If you download a reference from the internet, it must be spiral bound, hole-punched and placed in a binder, or stapled in the left-hand corner.

Organizing your references before exam day saves significant time during the test. Two products that work well for this:

Redi-Tag Permanent White Tabs — These laser-compatible adhesive tabs are durable, don't curl, and stay put under heavy use. Each pack includes 375 tabs, more than enough to index every reference. Because they're permanent tabs, they meet the exam's tabbing requirement.

Sharpie Tank Highlighters — A 12-pack in assorted fluorescent colors lets you color-code sections by topic area (yellow for financial, pink for workers' comp, etc.). The chisel tip handles both broad highlighting and margin notes. Sharpie's smear-resistant formula holds up through repeated reference use.

Study Tips for the PSI Oklahoma Plumbing Exam

Practice under timed conditions from the start. The open-book format does not remove time pressure — it redistributes it. Candidates who practice against a running clock build pacing discipline, which means they stop burning three minutes hunting for a single answer. By test day, the 120-minute window feels manageable because the format is already familiar.

Multiple choice rewards practice volume, not passive reading. Working through the PSI Oklahoma Plumbing study guide material is necessary, but reading alone does not build the pattern recognition that multiple-choice exams require. The terminology and question construction become second nature through repeated exposure to exam-style questions.

Target your weak topics, not your comfortable ones. After each practice session, identify the topics where you missed the most questions and focus your next session there. Re-testing weak areas produces measurably more score improvement than reviewing material you already understand.

Bring a compliant calculator. Silent, non-printing, non-programmable calculators are permitted. The calculator must have no paper tape and no alphabetic keyboard. Bidding, payroll, and financial questions involve real arithmetic — come prepared.

Frequently Asked Questions

How many questions are on the Oklahoma Plumbing Business and Law exam and how long do I have?
The exam has 50 scored questions and a 120-minute time limit. That averages to 2 minutes and 24 seconds per question — manageable if you keep moving and flag uncertain items for review rather than stalling.

What is the passing score for the Oklahoma Plumbing Business and Law exam?
You must answer 75% correctly to pass. Note that 75% of 50 questions is 37.5, and the Board rounds up — so the required count is 38 correct answers.

How much does it cost to take the exam?
The exam fee is $92 per examination portion. The fee is not refundable or transferable, and it applies whether you're taking the exam for the first time or retesting after a failure.

How do I register for the exam?
After the Oklahoma Construction Industries Board approves your application, schedule through the exam registration page or call PSI at (855) 834-8750. You'll need the OK Con ID number the Board provides to create your PSI account.

How long does my eligibility last?
Once the State approves your application, your eligibility does not expire. There is no deadline to schedule.

What is the retake policy if I fail?
After a first failure, you must wait 30 days before retesting. After a second failure or any subsequent failure, the waiting period extends to 90 days.

Is the exam open book?
Yes. You are responsible for bringing your own approved reference materials to the test center. Refer to the approved reference list above and ensure everything is properly tabbed and organized before exam day.

Can I use a calculator?
Yes — a silent, non-printing, non-programmable calculator is permitted. It must not have paper tape printing capability and must not have an alphabetic keyboard.

What topics does the exam cover?
Eight areas: Bidding and Estimating (10 items), Project Management and Supervision (7 items), Contracts (5 items), Financial (8 items), Labor and Personnel (5 items), Risk Management (4 items), Payroll and Payroll Taxes (6 items), and Licensing Requirements (5 items).

Start Your Preparation Today

The Oklahoma Plumbing Business and Law exam is a defined, passable test. The content is specific, the format is consistent, and candidates who prepare methodically pass at significantly higher rates than those who rely on open-book access alone.

Start with the free practice exam to gauge where you stand across the eight topic areas. When you're ready to build full exam readiness — timed, 50-question sessions drawn from a 338-question bank with detailed topic-level scoring — upgrade to the full practice exam. Use your results to direct your reference tabbing and study sessions, and you'll walk into the PSI test center with a clear advantage.