Class B licenses cover medium-duty trucks and certain commercial vehicles

A Class B driver's license authorizes you to operate single vehicles with a gross vehicle weight rating (GVWR) between 10,001 and 26,000 pounds. This includes delivery trucks, box trucks, dump trucks, and some transit buses. The exact vehicles permitted vary by state, but the weight threshold is the defining boundary.

Class B is not the same as a commercial driver's license (CDL). A CDL requires a written knowledge test, a skills test, and medical certification; a Class B typically requires only a written test and a standard driving test. However, some states treat Class B as a step below CDL and impose additional requirements beyond a standard passenger license.

You need a Class B license if your job involves driving a truck or bus that exceeds the weight limit for a regular passenger license but does not meet the threshold for a CDL in your state. Many delivery companies, small construction firms, and municipal services use Class B drivers.

Key Takeaways

  • Class B covers vehicles weighing 10,001 to 26,000 pounds GVWR, which includes box trucks, dump trucks, and some buses.
  • You do not need a CDL to drive a Class B vehicle, but you do need to pass a written test specific to that class in most states.
  • Requirements differ by state: some require only a written test, while others add a behind-the-wheel driving test or medical exam.
  • Your current license type (passenger, motorcycle, or commercial) affects what tests you must take to upgrade to Class B.

Vehicles you can and cannot drive with a Class B license

A Class B license permits you to drive a single vehicle (not a combination of vehicles) with a GVWR between 10,001 and 26,000 pounds. Common examples include straight trucks: box trucks used for delivery, dump trucks for construction, flatbed trucks, and some full-size transit buses. The vehicle must not tow a trailer heavier than a certain weight—usually 10,000 pounds or less, depending on your state.

You cannot drive a Class B vehicle if it is part of a combination (a truck towing a trailer that together exceed the weight limit). You also cannot drive a vehicle requiring a CDL, such as a semi-truck or tractor-trailer, even if the truck itself weighs less than 26,000 pounds. Some states exclude certain passenger buses or vehicles carrying hazardous materials from Class B authority.

Check your state's DMV handbook for the exact list of vehicles permitted under Class B. Some states use different class names (like Class 3 or Class 4) or define the weight ranges slightly differently. Your license card will specify which classes you hold.

Written test requirements for Class B

Most states require a written knowledge test to obtain or upgrade to a Class B license. The test covers vehicle operation, safety, weight and load limits, braking systems, and state traffic laws specific to larger vehicles. The number of questions varies: typically 30 to 50 questions, with a passing score of 70 to 80 percent.

Study materials are usually available free on your state DMV website as a downloadable manual or online study guide. Some states offer practice tests. You must schedule the written test at a DMV office or authorized testing location; you cannot take it online in most states.

If you already hold a valid driver's license (passenger or motorcycle), you may not need to retake the written test for basic traffic laws. Some states allow you to test only on Class B–specific content. Confirm with your state DMV whether you test on the full knowledge exam or a Class B supplement.

Driving test and behind-the-wheel requirements

Whether you must take a behind-the-wheel driving test for Class B depends on your state and your current license status. If you hold a valid passenger license and are upgrading to Class B, some states waive the driving test. Others require a full driving test in a Class B vehicle to demonstrate you can handle the size, braking, and visibility differences.

If you do not hold any valid license, you will need to pass a standard driving test in a Class B vehicle. You must provide your own vehicle or use one supplied by the testing facility. The test typically lasts 20 to 40 minutes and includes basic maneuvers, parking, and highway driving.

A few states require a pre-trip vehicle inspection as part of the driving test. You may need to demonstrate knowledge of the vehicle's brakes, lights, mirrors, and tire condition before the examiner will allow you to drive.

Medical certification and other requirements

Most states do not require a medical exam for a Class B license. However, some states impose a medical certificate if the vehicle carries passengers (such as a bus) or if you are over a certain age. Check your state DMV website to see whether a Class B medical exam is required.

If your state does require a medical certificate, you must visit a licensed physician or certified medical examiner and complete a form (often called a Medical Examination Report or MER). The exam checks vision, hearing, blood pressure, and general fitness to drive. The cost is usually $50 to $150 and is paid to the medical provider, not the DMV.

You may also need to provide proof of identity, proof of residency, and your Social Security number when you explore. Bring your current driver's license if you hold one. Some states require a vision test at the DMV even if you do not need a full medical exam.

Fees and renewal timelines for Class B

The cost to obtain or upgrade to a Class B license varies by state. Typical fees range from $30 to $100 for the license itself, plus any test fees (usually $10 to $25 per test). If a medical exam is required, add $50 to $150 for that. Some states charge a single combined fee; others itemize each component.

Class B licenses are usually valid for 4 to 8 years, depending on your state and age. When you renew, you may need to retake the written test or medical exam, or you may be able to renew by mail or online if you meet certain conditions. Check your state DMV renewal notice to see what is required.

Processing time for a new Class B license is typically 1 to 2 weeks if you explore in person at a DMV office. Some states offer expedited processing for an additional fee. You will receive a temporary paper license at the time of process and the plastic card by mail.

State-by-state differences in Class B requirements

Class B definitions and requirements are not uniform across the United States. Some states use Class B; others use Class 3, Class 4, or different naming systems. Weight thresholds, vehicle types, and test requirements all vary.

For example, California defines Class B as a single vehicle with a GVWR over 11,500 pounds but not requiring a CDL, and does not require a separate written test if you hold a valid Class C (passenger) license. Texas uses a similar structure but requires a written test for all Class B applicants. New York calls it a Class D and has different weight ranges.

Before you begin the process, visit your state DMV website and search for "Class B license" or "medium-duty truck license." Read the official requirements for your state, because following another state's procedure could delay your process or result in the wrong license type.

Frequently Asked Questions

Do I need a Class B license or a CDL to drive a box truck?

It depends on the box truck's GVWR. If it is under 10,001 pounds, you can drive it with a standard passenger license. If it is between 10,001 and 26,000 pounds and you are not towing a trailer, a Class B license is sufficient. If the truck is over 26,000 pounds or you are towing a trailer that pushes the combination over the limit, you need a CDL.

Can I upgrade from a passenger license to Class B without retaking the written test?

Some states waive the general knowledge test if you hold a valid passenger license, but most require you to pass a Class B–specific written test. A few states allow you to take only a supplement test covering Class B rules. Contact your state DMV to confirm whether you must take the full test or a shorter version.

What happens if I drive a Class B vehicle without the proper license?

Driving a vehicle that requires a Class B license without one is a traffic violation. Penalties typically include a fine (often $100 to $500), points on your driving record, and possible vehicle impoundment. In some states, it can be treated as a misdemeanor if you cause an accident.

How long does it take to get a Class B license?

The process usually takes 1 to 2 weeks from the time you pass all tests and submit your process. This includes time for the DMV to process your paperwork and mail your license card. If you need a medical exam, add 1 to 2 weeks for scheduling and completing that appointment.

Is a Class B license the same as a commercial driver's license?

No. A CDL is required for heavier vehicles, combinations of vehicles, or vehicles carrying hazardous materials or passengers. A Class B covers a narrower range of single vehicles and does not require the same medical certification, written test, or skills test as a CDL. Class B is a step between a passenger license and a CDL.