California Class B License Requirements, Training, and Skills Test

To meet the California Class B license requirements, you need to be at least 18, hold a valid California driver license, pass a DOT medical exam, complete federally registered entry-level driver training, pass the commercial written knowledge test, 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 process typically runs several weeks from your first DMV visit to a license in hand.

What a Class B License Lets You Drive

A California Class B CDL covers any single vehicle with a gross vehicle weight rating over 26,000 pounds, and it lets you tow a separate vehicle behind it as long as that trailer’s GVWR stays at or below 10,000 pounds. The classification also picks up any three-axle vehicle weighing more than 6,000 pounds.¹ Think straight trucks, transit buses, concrete mixers, dump trucks, and large box trucks.

What a Class B does not cover is a combination vehicle where the towed unit’s GVWR exceeds 10,000 pounds. That’s a Class A, which is what tractor-trailer drivers hold. If the vehicle you’ll drive is built to carry 16 or more people including you, the Class B covers the vehicle itself, but you’ll also need a passenger endorsement.

Age, Residency, and Documents

You have to be at least 18 to apply, and at that age you’re limited to intrastate driving: routes that begin and end inside California. Crossing state lines or hauling hazardous materials requires that you be at least 21.² You also need a valid California driver license already in your name before you apply for the commercial version.

Bring proof of identity, legal presence in the United States, and California residency to your DMV appointment. A U.S. passport or birth certificate handles identity and legal presence. Utility bills, bank statements, or a residential lease work for residency. The DMV will also want your Social Security number.

Drug and Alcohol 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 in the Clearinghouse means the DMV will deny your application.³ This applies even if you’ve never held a CDL, because the Clearinghouse tracks violations across employers and states. A prohibited status stays active until you complete a return-to-duty process with a substance abuse professional.

DOT Medical Exam

Every CDL applicant has to show a current Medical Examiner’s Certificate (MEC), Form MCSA-5876. You get one by passing a physical with a doctor on the FMCSA’s National Registry of Certified Medical Examiners.⁴ The exam looks at your vision, hearing, blood pressure, and overall physical fitness to drive a commercial vehicle.

Most DOT physicals cost between $50 and $200, and standard health insurance usually doesn’t cover them. A standard certificate is valid up to two years, but certain conditions like insulin-treated diabetes or vision waivers can shorten the window to one year or less.⁵ You submit the MEC to the DMV, which links it to your driving record.

When you submit the certificate, you also self-certify the type of commerce you plan to engage in. Most new Class B applicants choose non-excepted interstate (if they’ll ever cross state lines) or non-excepted intrastate (California only). The category you choose determines which medical standards apply.⁶

Entry-Level Driver Training

Before you can take the skills test, federal law requires you to complete Entry-Level Driver Training (ELDT) through a provider listed on the FMCSA’s Training Provider Registry.⁷ This applies to anyone getting a Class B for the first time or upgrading from a lower class. Training has two parts: classroom theory and behind-the-wheel instruction.

Theory covers vehicle inspections, basic control, speed and space management, hazard perception, hours-of-service rules, and post-crash procedures, among other topics. You need to score at least 80 percent on the theory assessment. The behind-the-wheel portion includes range exercises like straight-line backing, alley dock backing, offset backing, and parallel parking, plus on-road driving covering lane changes, highway entry and exit, and communication with other drivers.⁸

There is no federally mandated minimum number of training hours. The requirement is that your program covers every curriculum topic and that you demonstrate proficiency. In practice, most Class B programs run a few weeks and cost several thousand dollars, though tuition varies widely. You can search the Training Provider Registry at tpr.fmcsa.dot.gov to confirm a school is registered.⁹

Applying at the DMV and Taking the Written 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 application fee is $100, which includes the cost of your commercial learner’s permit.¹⁰

At that same visit, you take the written knowledge test. It covers general commercial driving principles and Class B-specific material: vehicle inspection, safe driving practices, air brakes (if your vehicle has them), and cargo handling. Endorsement knowledge tests are separate and can be taken the same day or later. You get three attempts to pass the knowledge tests on a single application.¹¹

The Commercial Learner’s Permit and 14-Day Wait

Pass the knowledge test and the DMV issues a commercial learner’s permit (CLP). You have to hold the CLP for at least 14 days before you can schedule the skills test.¹¹ The waiting period gives you time to practice in a Class B vehicle.

While driving on a CLP, federal rules require a qualified CDL holder to ride in the front passenger seat at all times. You can’t carry passengers for hire, and you can’t transport hazardous materials. The CLP is good for 180 days from issuance. If you don’t pass the skills test in that window, you’ll need to renew it, and any skills test segments you had already passed expire with the renewal.

The Skills Test

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

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

You get three total attempts to pass the skills test on a single application. Failing any one segment counts as one attempt.¹¹ A retest of the basic control or road portion costs $46 each time.¹⁰ After three failures the application is dead, and you start over with a new $100 application.

Air Brake Restriction

If you take the skills test in a vehicle that doesn’t have full air brakes, the DMV places an “L” restriction on your license barring you from driving air-brake-equipped vehicles. Most Class B trucks and buses have air brakes, so this restriction effectively locks you out of most jobs. Pass the air brake knowledge test and test in a vehicle with a full air brake system to keep your license unrestricted.

Endorsements You May Need

The base Class B covers driving the vehicle. Many jobs also require endorsements, each with its own test and fee.

Passenger (P)

Required to drive a bus or any vehicle built to carry 16 or more people including the driver. It involves a written knowledge test and taking your skills test in a passenger-type vehicle. Adding it to a Class A or B costs $100.¹⁰ California applies a stricter threshold than the federal minimum and also requires the P endorsement for commercial vehicles carrying more than 10 people.¹²

School Bus (S)

Requires the passenger endorsement first, plus a separate knowledge test covering student loading and unloading, emergency evacuations, and railroad crossing rules, and then a skills test in an actual school bus.¹³ California school districts run their own background checks and training on top of the CDL requirements.

Tanker (N)

For hauling liquid or gaseous materials in a tank. Knowledge test only, no additional driving test. The fee is $59.¹⁰

Hazardous Materials (H)

Requires you to be at least 21, pass a knowledge test, and complete a TSA security threat assessment with fingerprinting.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 Your 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 results in a one-year disqualification. If you were hauling hazmat at the time, it’s three years. A second conviction for any of these means a lifetime disqualification, though most states allow reinstatement after 10 years with a rehabilitation program.¹⁶

One category has no reinstatement path: using a commercial vehicle in a felony involving controlled substance trafficking or severe forms of human trafficking is a lifetime ban. Serious traffic violations like speeding 15 mph or more over the limit, reckless driving, or improper lane changes stack: a second conviction within three years triggers a 60-day disqualification, and a third within the same window extends that to 120 days.¹⁶

Keeping the License After You Have It

A California Class B CDL is valid for five years. The renewal fee is $59, and you’ll take a vision test at the DMV.¹⁰ Depending on your endorsements, you may also need to retake a knowledge test.

Your medical certificate runs on its own clock, up to two years for most drivers and shorter for certain health conditions.⁵ Submit a new MEC to the DMV before the current one expires. If the DMV’s records show an expired certificate, the CDL is downgraded to a regular non-commercial license, and you can’t legally drive a commercial vehicle again until you recertify and restore the CDL status.

Transferring an Out-of-State CDL

If you already hold a valid CDL from another state and move to California, you transfer it rather than start over. Federal law allows only one CDL at a time, so you surrender your out-of-state license when you apply here. Visit a DMV office in person with your current CDL, proof of California residency, identity documents, and a current medical certificate. California generally doesn’t require a new skills test for a transfer, though you may need to pass knowledge tests for certain endorsements. The DMV verifies your record through national databases, including the Drug and Alcohol Clearinghouse, before issuing the California license.

1
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
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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
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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
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State of California Department of Motor Vehicles. Licensing Fees
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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
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eCFR. 49 CFR 383.123 – Requirements for a School Bus Endorsement
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State of California Department of Motor Vehicles. TSA Background Check for HAZMAT Endorsement
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Transportation Security Administration. HAZMAT Endorsement
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eCFR. 49 CFR 383.51 – Disqualification of Drivers