Most first-time California contractor qualifiers need two exams:

1. The Law & Business exam and
2. The Trade exam (For the license classification being applied for.)

If you want to become a concrete contractor, for example, the usual combination is Law & Business plus C-8 Concrete. A general building applicant normally takes Law & Business plus B General Building.

The decision starts with the work you intend to contract for and the experience you can verify. Choose the classification first, then prepare for its exam. This guide helps you narrow that choice before completing your application or ordering a course.

1. Understand the two exams

The Law & Business Exam: Legally operating a California contracting business

The Law & Business exam covers the business responsibilities that come with a contractor license: licensing, business organization and finances, employment, insurance and liens, contracts, public works, and safety. It is a separate exam from the trade test. Read the official Law & Business study guide to see its topic outline.

The Trade Exam: the type of work classification you are requesting

The trade exam depends on the classification. B General Building, C-8 Concrete, and C-10 Electrical are all different trade exams. Passing Law & Business alone does not satisfy a required trade examination.

For example, the B General Building outline covers planning and estimating, framing and structural components, core trades, finish trades, and safety. The B-2 Residential Remodeling outline focuses on remodeling, including preparation, interior and exterior work, estimating, and safety. These outlines help you understand what to study; the classification’s legal description determines the permitted scope of work.

2. Choose the classification that fits your work

Start with CSLB’s classification directory. Read the full description for the classification you are considering, including its restrictions. A job title such as “remodeler” or “construction supervisor” does not settle the choice by itself.

A: infrastructure and engineering construction

The A General Engineering classification includes fixed works such as highways, bridges, drainage, sewers, and certain utility and industrial projects. The type of construction matters. A larger price or a commercial customer does not, by itself, make a job General Engineering.

B: general building, with specific contracting rules

A B license does not give unrestricted authority to take every single-trade job. For a project involving work beyond framing or carpentry, the usual rule requires at least two unrelated trades other than framing or carpentry. A B contractor may also take a framing or carpentry contract by itself.

For a prime contract outside that usual rule, holding the appropriate specialty classification or subcontracting the work to an appropriately licensed specialty contractor can matter. The subcontract rule differs: a B contractor taking a single-specialty subcontract cannot rely on that prime-contract subcontracting exception. Fire protection and well drilling also have specific restrictions. Read CSLB’s B classification and its General B job examples before deciding whether a particular contract fits.

B-2: residential remodeling, with a narrower scope

B-2 Residential Remodeling applies to existing residential wood-frame structures and requires at least three unrelated trades under one contract. It does not permit structural changes to load-bearing portions of the building.

B-2 also restricts installing, replacing, substantially altering, or extending electrical, plumbing, and mechanical systems unless the contractor holds the appropriate classification or uses an appropriately licensed subcontractor. Limited fixture work and minor alterations have specific allowances. Fire protection, asbestos abatement, and well drilling require the appropriate classification or licensed subcontractor. Read those limits before choosing B-2.

C classifications: a specific trade

If your business will concentrate on one trade, look at its specialty classification first. Examples include C-8 Concrete, C-10 Electrical, C-20 HVAC, C-27 Landscaping, C-33 Painting and Decorating, and C-36 Plumbing. There is no single general “C exam” covering all specialty trades.

C-61: limited specialty, with no Trade exam

CSLB identifies C-61 work using D subcategories. The license is limited to the field and scope CSLB accepts; it is not a general handyman license. The absence of a trade exam does not remove experience or other licensing requirements. Check the current C-61 list, since some older D categories have moved to other classifications. CSLB’s exam-guide directory confirms the C-61 trade-exam exception.

3. Work through practical examples

These fictional situations show how to investigate a classification. They are starting points for comparing scope and experience, rather than approvals for a particular project.

4. Match the choice to your qualifying experience

The Qualifying Individual (Qualifier) is the person meeting the experience and examination requirements for the business. That person may be the owner or another eligible person serving in the appropriate role. The business entity itself does not sit for the exams.

The usual requirement is four qualifying years in the classification within the ten years immediately before filing. Qualifying work is at journey level or in an eligible supervisory or contractor role. Education or apprenticeship credit may apply, and special exceptions exist. Check CSLB’s basic qualifications and experience and education-credit guidance.

Start by writing the duties you actually performed or directly supervised. Then identify a Certifier who can verify that experience from firsthand knowledge. Our Certification of Work Experience guide shows how to complete the form with short duty examples.

5. Check whether an exception changes your exam plan

• C-61: no trade exam is required. Law & Business normally remains part of a new Qualifier’s requirements.
• Previously qualified or passed California exams: CSLB has waiver provisions involving prior qualification or examination in the same classification, including specified five-year rules. Review the original-license waiver instructions; years of construction experience alone do not automatically waive exams.
• Adding a classification: use the additional-classification process. A required new trade exam, previous Law & Business qualification, and any waiver must be assessed for the individual Qualifier. See CSLB’s requirements for adding a classification.
• Licensed in another state: reciprocity and certain other routes can support a trade-exam waiver when their conditions are met. They do not automatically waive California Law & Business or transfer a license into California. Check CSLB’s current reciprocity and NASCLA requirements and the waiver questions on the applicable application.

Check these routes early, then follow CSLB’s determination for your application. Buying a trade-only package makes sense when you have confirmed that the trade exam is the preparation you still need.

6. Before you order exam preparation

• I know the exact classification code and name. For example, C-8 Concrete, rather than simply “contractor exam.”
• I read its complete CSLB scope. My intended contracts fit its limits.
• I checked the Qualifier’s experience. The duties and Certifier support the classification being requested.
• I know which exams remain required. Law & Business, the trade exam, or a combination, subject to CSLB’s review.
• I opened the official study guide. The course matches the exam title, current outline, and applicable exam instructions.

CSLB provides free examination study guides with topic breakdowns, sample questions, and study resources. Use yours to plan your preparation. Once the exam choice is settled, our study and test-day strategy guide explains how to build a useful routine.

Prepared by Thompson Learning, an independent exam-preparation provider. Classification summaries and fictional examples help you investigate your options; they do not replace CSLB’s descriptions or application review. Requirements and linked guidance checked October 15, 2026.