California Class B License Requirements: Exams, Permit, and Skills Test

To meet California’s Class B license requirements, you must be at least 18 years old, hold a valid California driver license, pass a DOT medical exam, complete federally registered entry-level driver training, pass a written knowledge test at the DMV, hold a commercial learner’s permit for at least 14 days, and then pass a three-part behind-the-wheel skills test. The application fee is $100, and the whole process typically takes a few weeks at minimum.¹

What a Class B License Lets You Drive

A California Class B commercial driver license covers any single vehicle with a gross vehicle weight rating over 26,000 pounds, and you can tow a separate vehicle behind it as long as the towed unit’s GVWR is 10,000 pounds or less. It also covers any three-axle vehicle weighing over 6,000 pounds.² Think straight trucks, transit buses, concrete mixers, dump trucks, and large box trucks.

What Class B does not cover: combination vehicles where the towed unit’s GVWR is above 10,000 pounds. Those need a Class A. If your goal is driving a tractor-trailer, Class B is the wrong license.

Age, Residency, and Documents

You must be 18 to apply, but at that age you’re limited to intrastate driving. Crossing state lines or hauling hazardous materials requires you to be at least 21.³ You also need a current, valid California driver license before you can apply for the CDL.

At your DMV appointment, bring proof of identity, legal presence in the United States, and California residency. A U.S. passport or birth certificate handles identity and legal presence. Utility bills, bank statements, or a residential lease work for residency. You’ll also give the DMV your Social Security number.

The FMCSA Clearinghouse Check

Since November 18, 2024, the California DMV queries the FMCSA Drug and Alcohol Clearinghouse before issuing or renewing any CDL or commercial learner’s permit. A prohibited status on the Clearinghouse — the result of a drug or alcohol program violation — will get your application denied, even if you’ve never held a CDL before.⁴ Prohibited status stays active until you complete a return-to-duty process with a substance abuse professional.

The DOT Medical Exam

Every applicant needs a current Medical Examiner’s Certificate (Form MCSA-5876), earned by passing a physical with a doctor on the FMCSA’s National Registry of Certified Medical Examiners.⁵ The exam checks your vision, hearing, blood pressure, and general physical fitness to drive commercially. Most DOT physicals run between $50 and $200, and standard health insurance usually doesn’t cover them.

A standard certificate is valid up to two years. Certain conditions — insulin-treated diabetes and vision waivers among them — can shorten the certification to one year or less.⁶

When you submit the certificate to the DMV, you also self-certify which type of commerce you’ll operate in. Most new applicants choose non-excepted interstate (if crossing state lines) or non-excepted intrastate (California only). The category you pick determines which medical standards apply to you.⁷

Entry-Level Driver Training

Federal law requires you to complete Entry-Level Driver Training (ELDT) through a provider listed on the FMCSA’s Training Provider Registry before you can take the skills test.⁸ This is a one-time requirement for anyone getting a Class B CDL for the first time or upgrading from a lower class.

Training has two components. The theory portion covers vehicle inspections, basic control, speed and space management, hazard perception, hours-of-service rules, and post-crash procedures, and you must score at least 80 percent on the theory assessment. Behind-the-wheel training covers range exercises like straight-line backing, alley dock backing, offset backing, and parallel parking, plus on-road driving with lane changes, highway entry and exit, and communication with other drivers.⁹

There’s no federal minimum number of hours. What’s required is that every curriculum topic is covered and you demonstrate proficiency. Most Class B programs run a few weeks and cost several thousand dollars, though tuition varies widely. Verify any school you’re considering is registered at tpr.fmcsa.dot.gov.¹⁰

Applying at the DMV and Passing the Knowledge Test

You apply in person at a DMV field office that handles commercial licensing. Bring your medical certificate, identity and residency documents, and your California driver license. You’ll complete the commercial driver license application and, if applicable, a 10-Year History Record Check (Form DL 939). The nonrefundable Class B application fee is $100, which includes the commercial learner’s permit.¹

At the same visit you take the written knowledge test. It covers general commercial driving principles and Class B-specific material: vehicle inspection procedures, safe driving practices, air brakes if applicable, and cargo handling. If you’re also seeking endorsements like passenger or hazmat, each has its own written test. You get three attempts to pass the knowledge tests on a single application.¹¹

The Learner’s Permit and 14-Day Wait

Once you pass the knowledge test, the DMV issues a commercial learner’s permit. You must hold it for at least 14 days before you can schedule the skills test.¹¹ This window exists so you can practice in a real Class B vehicle before testing.

While driving on the permit, a qualified CDL holder must ride in the front passenger seat at all times. You cannot carry passengers for hire and cannot transport hazardous materials. The permit is valid for 180 days from issuance. Miss that window and you renew, but any skills test segments you already passed reset to zero.

The Three-Part Skills Test

The skills test is a behind-the-wheel exam in a Class B vehicle, scheduled by appointment at a DMV commercial driving test office. It has three parts:

Vehicle inspection: You walk around the vehicle and tell the examiner what you’re checking and why, covering the engine compartment, brakes, tires, lights, mirrors, steering, and safety equipment like reflective triangles and a fire extinguisher.
Basic vehicle control: You demonstrate you can move the vehicle forward, backward, and turn it within a defined space, with maneuvers like straight-line backing and alley dock backing.
Road test: You drive a DMV-specified route in real traffic, showing lane changes, turns, highway merging, and safe driving behavior.

You get three attempts total on a single application. Failing any one segment counts as one attempt.¹¹ If you fail the basic control or road portion, the retest fee is $46 each time.¹ After three failures your application closes, and you start over with a new $100 application.

Avoiding the Air Brake Restriction

If you take your skills test in a vehicle without full air brakes, the DMV places an “L” restriction on your license that prevents you from driving air-brake-equipped vehicles. Most Class B trucks and buses have air brakes, so this restriction shuts you out of most jobs. To avoid it, pass the air brake knowledge test and take your skills test in a vehicle with a full air brake system.

Endorsements You May Need for the Job

Class B covers the vehicle itself. Many jobs require one or more endorsements on top of the base license, each with its own test and fee.

Passenger (P)

Required to drive a vehicle built to carry 16 or more people including the driver. You take a separate knowledge test on passenger safety and loading, and you take the skills test in a passenger-type vehicle. The fee to add a P endorsement is $100.¹ California applies a stricter threshold than federal law — a P endorsement is required for commercial vehicles carrying more than 10 people.¹²

School Bus (S)

Driving a school bus requires both the P and S endorsements. The S endorsement adds a knowledge test on student loading and unloading, emergency evacuations, and railroad crossings, plus a skills test in an actual school bus.¹³ School districts add their own background checks and training on top.

Tanker (N)

Required for hauling liquid or gaseous materials in a tank. Knowledge test only; no additional driving test. The fee is $59.¹

Hazardous Materials (H)

Requires a knowledge test, a TSA security threat assessment, and fingerprinting. You must be at least 21. After passing the hazmat knowledge test at the DMV, you pre-enroll online for the TSA threat assessment and then visit a Universal Enrollment Services center for fingerprints and identity documents.¹⁴ The TSA fee is $85.25 and the DMV endorsement fee is $59.¹⁵ TSA aims to process applications within 60 days, so start early.

Convictions That Can Block a CDL

Certain convictions disqualify you from holding a CDL, whether the offense happened in a commercial vehicle or your personal car.

A first conviction for driving under the influence, leaving the scene of an accident, or using a vehicle to commit a felony brings a one-year disqualification. If hazmat was on board at the time, that jumps to three years. A second conviction for any of those offenses means a lifetime disqualification, though most states allow reinstatement after 10 years with a rehabilitation program.¹⁶ One category has no reinstatement at all: using a commercial vehicle in a felony involving controlled substance trafficking or severe forms of human trafficking is a lifetime ban.

Serious traffic violations stack. A second conviction within three years for offenses like speeding 15 mph or more over the limit, reckless driving, or improper lane changes triggers a 60-day disqualification. A third within the same three-year window extends it to 120 days.¹⁶

Keeping the License Valid

A California Class B CDL is valid for five years. Renewal costs $59 and requires a vision test at the DMV, plus a knowledge test in some cases depending on your endorsements.¹

Your medical certificate runs on a separate clock — up to two years, sometimes less.⁶ Submit a new certificate to the DMV before the current one expires. If the DMV’s records show an expired medical certificate, the CDL is downgraded to a regular non-commercial license, and you can’t legally drive a commercial vehicle until you get recertified and restore CDL status. It’s one of the most common ways drivers lose their commercial privileges without meaning to.

1
State of California Department of Motor Vehicles. Licensing Fees
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State of California Department of Motor Vehicles. Commercial Driver’s License Classes and Certifications
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State of California Department of Motor Vehicles. Commercial Driver’s Licenses
4
United States Department of Transportation. FMCSA Drug and Alcohol Clearinghouse
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Federal Motor Carrier Safety Administration. Medical Examiner’s Certificate (MEC), Form MCSA-5876
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Federal Motor Carrier Safety Administration. Effect of the Length of Medical Certification on Safety
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U.S. Department of Transportation Federal Motor Carrier Safety Administration. How Do I Determine Which of the 4 Categories of Commercial Motor Vehicle (CMV) Operation I Should Self-Certify To
8
eCFR. 49 CFR Part 380 Subpart F – Entry-Level Driver Training Requirements On and After February 7, 2022
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Training Provider Registry. ELDT Entry-Level Driver Training Minimum Federal Curricula Requirements
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eCFR. 49 CFR Part 380 Subpart G – Registry of Entry-Level Driver Training Providers On and After February 7, 2022
11
California State Department of Motor Vehicles. Commercial Driver Handbook – Section 1 Introduction
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California Department of Motor Vehicles. Commercial Driver Handbook – Section 4 Transporting Passengers Safely
13
eCFR. 49 CFR 383.123 – Requirements for a School Bus Endorsement
14
State of California Department of Motor Vehicles. TSA Background Check for HAZMAT Endorsement
15
Transportation Security Administration. HAZMAT Endorsement
16
eCFR. 49 CFR 383.51 – Disqualification of Drivers