The California Law and Business Exam
Updated 2026-09-28
Whatever trade you are licensed in, CSLB wants proof that you can run a construction business within California law. The Law and Business exam is that proof. Every qualifying individual must pass it, including C-61 applicants who have no trade exam and out-of-state licensees who get the trade exam waived through reciprocity.
CSLB's study guide for the exam, form 13E-LAW dated March 2026 and in use for exams since December 1, 2021, breaks it into seven sections. This page goes through each one, the test format, and the reading list CSLB attaches, so you can plan study time by weight instead of guessing.
Format and rules
The exam is closed book. You get four answer choices per question with one best answer, some questions involve math, and PSI supplies a calculator. There is no penalty for guessing. CSLB gives 3 1/2 hours for the sitting and does not publish the number of questions or the cut score, which you learn at the test site.
You schedule through PSI after CSLB accepts your application, and each attempt costs $51.43 under PSI's current fee record. Failing means a 21-day wait before trying again, all inside the 18-month life of the application. Once you pass, the result stays good for five years, so you need not repeat it if the trade exam takes longer.
According to the study guide, licensed contractors who are actively working in the trade write and review the questions. That shows in the style: the items read like decisions a business owner makes about payroll, a contract clause or a jobsite hazard, not like textbook definitions. A failing score report shows how you did in each of the seven sections, which makes a retake plan easy to build.
The seven sections and their weights
CSLB marks these percentages as approximate. Employment and contracts together make up more than 40 percent of the test, so they deserve the largest share of your study hours.
- Business Organization and Licensing, 13 percent: company organization, licensing requirements, advertising and subcontracting.
- Business Finances, 15 percent: cash management, budgeting and planning, taxes, financial reporting.
- Employment Requirements, 20 percent: hiring, supervising and training employees, evaluation and record-keeping, payroll.
- Insurance and Liens, 12 percent: workers' compensation, business insurance, liens and other remedies.
- Contract Requirements and Execution, 21 percent: bidding, cost control, project organization, contracts, payments.
- Public Works, 5 percent: prevailing wage, bonding and insurance requirements.
- Safety, 14 percent: training and reporting requirements, general safety, hazardous or unknown materials.
Licensing, organization and finances
The licensing section rests on the Contractors State License Law in the Business and Professions Code. Expect the rules CSLB applies every day: the $1,000 threshold for needing a license, who can serve as qualifier and for how many firms, what an RME must do, the $25,000 contractor bond and the separate bond of qualifying individual, and how a license changes when a business changes form. Advertising and subcontracting rules sit in this section too.
Business Finances is accounting at the level a contractor needs: cash flow, budgets, job costs versus overhead, and tax deposits. CSLB's own sample question on depreciation of a sales car tests the difference between general and administrative costs and direct job costs, which tells you the level of bookkeeping expected.
Employment, insurance and liens
At 20 percent, Employment Requirements is the second-heaviest section. It covers the life of an employee from hiring to payroll, and CSLB lists the EDD's California Employer's Guide (DE 44) and IRS Publication 15, the Employer's Tax Guide, as references. Payroll deposit timing, withholding and required records are fair game.
Insurance and Liens pairs workers' compensation and business insurance with lien rights and other payment remedies. Know which classifications must carry workers' compensation with no employees (C-8, C-20, C-22, C-39 and tree service) and that a lapse in coverage suspends the license. CSLB's reading list names no separate lien handbook, so its core reference, the License Law and Reference Book, is where to begin.
Contracts, public works and safety
Contract Requirements and Execution is the largest section at 21 percent. It runs from bidding and estimating through cost control, project organization, contract terms and getting paid. The contract rules in the Contractors License Law, including home improvement contracts, are reprinted in the License Law and Reference Book, and CSLB also lists the Financial Code for questions about the PACE financing program.
Public Works is only 5 percent but draws on a specific source, the Department of Industrial Relations Public Works Manual. Know that prevailing wages apply and that under Labor Code section 1725.5 a contractor or subcontractor must be registered with DIR to bid on or perform covered public work. Safety, at 14 percent, uses Cal/OSHA's Title 8 safety orders: required training and injury reporting, general jobsite rules, and how to respond to hazardous or unidentified materials.
CSLB's reading list
The study guide names the references questions are drawn from. None may be brought into the exam, but they define what is tested:
- California Contractors License Law and Reference Book (Matthew Bender), the core text; CSLB lets you view it online.
- Get Licensed to Build and Maintain and Change Your License, both published online by CSLB.
- California Employer's Guide (DE 44) from the Employment Development Department.
- IRS Publication 15 (Circular E), Employer's Tax Guide.
- Public Works Manual from the Department of Industrial Relations.
- Cal/OSHA General Industry, Construction and Electrical Safety Orders, Title 8.
- The California Labor Code and Financial Code, and the NASCLA Contractors Guide to Business, Law and Project Management, 14th edition.
A study plan that follows the weights
Give contracts, employment, finances and safety most of your time, since they add up to 70 percent. Read the License Law and Reference Book with the section list open, then use DE 44 and Publication 15 for payroll. Leave public works for a focused final pass. Because the exam is closed book, practice recalling rules rather than looking them up.
ContractorPrepHQ's California Law and Business practice costs $99 and includes original questions written to this outline, a diagnostic, topic drills with explanations, and timed practice exams that report a readiness score. It is a one-time purchase with lifetime access and a 30-day money-back guarantee.
Common questions
- Do I have to take Law and Business if I already hold a license in another state?
- Yes. CSLB's reciprocity pages say the trade exam may be waived for qualifying licensees from Arizona, Louisiana, Mississippi, Nevada and North Carolina, but the business law portion is still required.
- Can I bring the License Law book into the exam?
- No. The study guide says the exam is closed book and no reference materials may be used.
- Which section is weighted most heavily?
- Contract Requirements and Execution, at about 21 percent, followed by Employment Requirements at about 20 percent.
- Is the Law and Business exam offered in Spanish?
- PSI lists a Spanish version of the CA Law and Business test, and CSLB posts a Spanish study guide.
Keep reading
Sources
General information, not legal advice. Confirm current requirements, fees and forms with the state licensing board.