California CDL Exam Prep

California Department of Motor Vehicles (DMV) is the state agency responsible for issuing Commercial Driver's Licenses (CDL) in California. A CDL is required to legally operate commercial motor vehicles covered by 49 CFR Part 383, including large trucks, buses, and other vehicles above the federal weight and passenger thresholds. DMV administers the knowledge and skills testing process, working within the framework set by the Federal Motor Carrier Safety Administration (FMCSA), while applying its own state-specific fees, scheduling, and administrative rules.

Every CDL applicant must first hold a Commercial Learner's Permit (CLP), pass the applicable knowledge test or tests, and wait at least the federal minimum 14 days after CLP issuance before attempting the skills test. Anyone applying for a first-time Class A or Class B CDL, upgrading from Class B to Class A, or applying for the P, S, or H endorsement for the first time must also complete Entry-Level Driver Training (ELDT) through a provider listed on the FMCSA Training Provider Registry before testing, a federal requirement in effect since February 7, 2022. California requires skills-test appointments; walk-in skills testing is not offered.

California issues the three federal CDL classes defined in 49 CFR 383.91:

• Class A - Any combination of vehicles with a combined gross vehicle weight rating of 26,001 pounds or more, provided the vehicle(s) being towed have a gross vehicle weight rating of more than 10,000 pounds.
• Class B - A single vehicle with a gross vehicle weight rating of 26,001 pounds or more, or such a vehicle towing a unit with a gross vehicle weight rating of 10,000 pounds or less.
• Class C - A vehicle that does not meet the Class A or B definition but is designed to transport 16 or more passengers including the driver, or is used to transport hazardous materials requiring placards under 49 CFR 383.5.

Endorsements can be added to any class as needed: H (hazardous materials), N (tank vehicle), P (passenger), S (school bus), T (doubles/triples), and X (combined tank vehicle and hazmat).

California DMV administers the skills test directly by default, and skills-test appointments are mandatory; the DMV explicitly states that skills tests are not given without an appointment. An alternative path is the Employer Testing Program (ETP), where certified employers test their own employees for Class A or B only (Class C is excluded), under 13 CCR Division 1, Chapter 1, Article 2.1 and California Vehicle Code Section 15250. The DMV does not publish an exact question count for the general knowledge test on its current pages, so confirm the current format in the commercial driver handbook before your test date.

DMV does not publish an exact passing percentage for its CDL knowledge tests on its official materials. The federal minimum passing score under 49 CFR 383.135(a)(1) is 80 percent, and it is reasonable to expect California follows that floor, but California has not stated the number itself in the sources reviewed for this guide. Confirm the current passing standard directly with DMV or in the current manual before your test date.

Typical requirements to obtain a CDL in California include:

• Minimum age 18 for intrastate-only driving; minimum age 21 for interstate operation, hazmat (H or X endorsement), or passenger and school-bus (P or S) transport.
• A valid DOT medical certificate from an examiner listed on FMCSA's National Registry of Certified Medical Examiners.
• Entry-Level Driver Training (ELDT) through a provider on the FMCSA Training Provider Registry, required since February 7, 2022, for first-time Class A or B applicants, Class B-to-A upgraders, and first-time P, S, or H endorsement applicants (anyone who already held the relevant credential before that date is grandfathered).
• A Commercial Learner's Permit (CLP), held for a federal minimum of 14 days before the skills test may be scheduled.
• Passing the applicable knowledge test (general knowledge, plus air brakes and combination vehicles if applicable) and the skills test (vehicle inspection, basic controls, and road test).
• For the H or X hazmat endorsement, a TSA Security Threat Assessment (fingerprint-based background check) under 49 CFR Part 1572, in addition to the age-21 minimum.

Requirements can change. Always confirm current licensing rules with DMV before applying.

California DMV publishes these CDL fees: an original Class A or B CDL is $100; renewal of a Class A or B is $59; a Class C original or renewal is $59; a skills retest is $46; the N, H, and T endorsements are $59 each; the P endorsement is $100 for Class A or B; a Class C endorsement grouping is $59. The DMV does not publish a separate CLP fee, a distinct S or X endorsement fee line, or a separate first-attempt skills-test fee. Always confirm current fee amounts on the official DMV fee page before paying.

A focused 6 to 8 week study plan works well for most California CDL candidates:

• Week 1-2: Learn the CDL class definitions (A, B, C), the endorsement letter codes (H, N, P, S, T, X), and the restriction codes (E, L, Z, K, O, M, N, V) from 49 CFR 383.153.
• Week 3-4: Study general knowledge topics: vehicle inspection, basic control, safe driving practices, and air brakes.
• Week 5: Focus on the combination vehicles section (coupling and uncoupling, doubles and triples basics) if you are pursuing a Class A license.
• Week 6: Review any endorsement-specific content you need (hazmat, tank vehicle, passenger, school bus) and confirm ELDT training provider requirements if this is your first Class A or B CDL.
• Week 7-8: Take full-length practice tests, review missed questions, and confirm the current knowledge and skills test format with DMV before your test date.