About the CSLB Law and Business Exam
Every contractor license applicant in California must pass the Law and Business exam. Here's what you need to know before you sit down at the testing center.
The CSLB Law and Business Exam
The Law and Business exam is one of two exams required to obtain a California contractor's license. It is administered by the Contractors State License Board (CSLB) and tests your knowledge of California business law, employment regulations, contract requirements, insurance, liens, safety, and financial management as they apply to the construction industry.
Every applicant takes the same Law and Business exam regardless of trade classification. You must also pass a separate trade-specific exam for your license category (B — General Building, C-10 Electrical, C-36 Plumbing, etc.).
Exam Format
| Questions | Approximately 115 multiple-choice (four answer choices each) |
|---|---|
| Time Limit | Approximately 3 hours |
| Format | Computer-based at a PSI testing center |
| Open/Closed Book | Closed book. No notes, books, or reference materials allowed |
| Guessing Penalty | None. Answer every question, even if you're unsure |
| Tools Provided | On-screen calculator; scratch pad and stylus for notes |
| Results | Displayed immediately after you finish (pass/fail) |
Passing Score
The CSLB does not publicly publish the exact passing threshold — you'll be informed of the required score at the testing center. Based on the official CSLB study guide and widely reported figures, the passing score is approximately 72%, meaning you need roughly 83 correct answers out of 115 questions. If you don't pass, your actual score will be shown so you know how close you were.
Exam Topics and Weights
The exam draws from seven topic areas. The CSLB assigns each area a percentage weight that determines how many questions come from that topic.
| Topic | % of Exam |
|---|---|
|
Business Organization and Licensing Company organization, licensing requirements, and advertising and subcontracting | 13% |
|
Business Finances Cash management, budget and planning, taxes, and financial reporting | 15% |
|
Employment Requirements Hiring employees, supervising and training employees, evaluation and record-keeping, and payroll | 20% |
|
Insurance and Liens Workers' compensation insurance, business insurance, and liens and other remedies | 12% |
|
Contract Requirements and Execution Bidding, cost control, project organization, contracts, and payments | 21% |
|
Public Works Prevailing wage requirements, bonding requirements, and insurance requirements | 5% |
|
Safety Training and reporting requirements, general safety, and hazardous/unknown materials | 14% |
The heaviest areas are Contract Requirements (21%) and Employment Requirements (20%). Together they make up over 40% of the exam, so allocate your study time accordingly.
Recommended Study Materials
The CSLB recommends the following primary resources. A study guide listing topic breakdowns, sample questions, and resource recommendations is sent to you with your Notice to Appear.
California Contractors License Law & Reference Book — the core reference covering Business & Professions Code sections relevant to contractor licensing. Available for free download from the CSLB website.
CSLB Law & Business Study Guide — outlines each topic area and its weight, includes sample questions, and lists additional recommended reading. Also available on the CSLB website.
PSI also sends applicants a Candidate Information Bulletin that includes exam topic breakdowns and testing procedures. This material is available on the CSLB website as well.
Additional resources include employer guides from state and federal tax agencies, Cal/OSHA safety publications, and materials on business management and construction law.
Exam Day Tips
Time management: With approximately 3 hours available, you have roughly 1 minute 50 seconds per question. Don't rush, but don't get stuck on any single question either.
Answer every question: There's no penalty for guessing. Never leave a question blank. Eliminate the answer choices you know are wrong and pick from the rest.
Read carefully: Pay attention to words like "except," "not," "always," and "never." Many questions test whether you can distinguish between similar-sounding rules.
Know the numbers: Dollar thresholds, timeframes (days to respond, deadlines for filing), and percentage requirements come up frequently. These are exactly the kinds of details this practice tool is designed to help you memorize.