A B endorsement lets you drive a bus carrying passengers for hire

A B endorsement on your commercial driver's license (CDL) authorizes you to operate a bus designed to carry more than 15 passengers, including the driver. This includes school buses, transit buses, tour buses, and shuttle services. Without it, you cannot legally drive a bus for compensation, even if you hold a valid CDL in another class.

The B endorsement is separate from your base CDL class (Class A, B, or C). You can hold a Class B CDL and still need a B endorsement to drive a passenger bus. The endorsement requires passing both a written knowledge test and a skills test specific to passenger vehicle operation.

States issue the B endorsement only after you pass these tests and meet medical and background requirements. The process typically takes a few weeks from start to finish, depending on your state's testing schedule and how quickly you prepare.

Key Takeaways

  • A B endorsement is required to drive any bus carrying more than 15 passengers for hire, regardless of your CDL class.
  • You must pass a written knowledge test covering passenger safety, emergency procedures, and vehicle operation specific to buses.
  • You must also pass a behind-the-wheel skills test in an actual bus or bus-sized vehicle, which includes pre-trip inspection, basic controls, and on-road driving.
  • Most states require a medical certificate and a clean background check before you can test for the B endorsement.
  • The B endorsement appears on your CDL as a separate notation and must be renewed along with your license.

Who needs a B endorsement

You need a B endorsement if you are paid to drive a bus. This includes school bus drivers, public transit operators, tour bus drivers, shuttle drivers for hotels or airports, and drivers for charter bus companies. If you drive a bus as part of your job—even part-time—you must have the endorsement.

You do not need a B endorsement if you drive a van or minibus designed to carry 15 or fewer passengers. Some states have separate endorsements for smaller passenger vehicles, but the B endorsement specifically covers buses with seating for 16 or more people.

If you currently drive a bus without a B endorsement, you are operating illegally. Your employer is also liable. Contact your state's Department of Motor Vehicles (DMV) or equivalent agency to begin the testing process.

Written knowledge test for the B endorsement

The written test covers passenger safety, emergency procedures, and bus-specific driving rules. You will answer questions about how to load and unload passengers safely, what to do if a passenger becomes ill or disruptive, how to handle emergency exits and evacuation procedures, and how to inspect a bus before driving.

The test also covers air brake systems (if your bus uses them), proper mirror use, backing procedures, and how to manage passengers during sudden stops or turns. Questions focus on real situations you will face as a bus driver, not abstract theory.

Most states allow you to study using the official CDL manual and practice tests. Your state's DMV website lists the specific topics covered. You typically have a set number of attempts to pass—often three—before you must wait a period of time before retesting.

Skills test and behind-the-wheel requirements

After passing the written test, you must pass a skills test in an actual bus or a vehicle of similar size and weight. The test has three parts: pre-trip inspection, basic vehicle control, and on-road driving.

During pre-trip inspection, you walk around and inside the bus, checking mirrors, lights, brakes, doors, emergency equipment, and passenger seating. The examiner watches to confirm you know where safety equipment is located and can identify problems that would make the bus unsafe to drive.

Basic vehicle control tests your ability to back up in a straight line, back into an alley or parking space, and perform a lane change. These maneuvers are harder in a bus than in a car because of the vehicle's length and the way it handles.

The on-road portion lasts 20 to 30 minutes. You drive in city traffic, on highways, and through residential areas. The examiner watches how you use mirrors, how you handle turns and stops, how you manage speed, and how you respond to other traffic. You must demonstrate safe passenger handling—for example, accelerating and braking smoothly so passengers do not fall.

Medical certificate and background requirements

Before you can test for a B endorsement, you must have a valid medical certificate issued by a certified medical examiner. This certificate confirms you meet federal health standards for commercial drivers. You need good vision, hearing, and blood pressure control. Certain medications and medical conditions can disqualify you.

You must also pass a background check. States look for disqualifying offenses such as felonies involving drugs or violence, certain traffic violations, and previous CDL suspensions. A DUI or reckless driving conviction may disqualify you or delay your endorsement.

Some states require fingerprinting and a check against national databases. This process can take two to four weeks. Contact your state's DMV to learn what documents you need to bring and whether you must schedule an appointment for the medical exam.

Cost and timeline for getting a B endorsement

The cost varies by state. Written test fees typically range from $10 to $50. Skills test fees are usually higher—often $100 to $300—because the test requires an examiner and a bus. Some states charge an additional endorsement fee of $10 to $30 to add the B to your license.

The medical exam costs $50 to $150 and is your responsibility, though some employers cover it. If you need to retake the written or skills test, you pay the fee again.

Timeline depends on your state's testing schedule and how quickly you prepare. If you study the manual and pass the written test on your first try, you might be ready for the skills test within two to four weeks. The skills test itself may have a waiting list, especially in busy areas. From the day you start studying to the day you receive your endorsed license, plan for four to eight weeks.

Renewing and maintaining your B endorsement

Your B endorsement renews along with your CDL. Most states require renewal every four to eight years, depending on your age and state law. When you renew, you must pass the written test again. Some states waive the skills test for renewals if you have a clean driving record, but others require it every time.

Your medical certificate must remain valid at all times while you hold a B endorsement. If your certificate expires, your endorsement becomes invalid, and you cannot legally drive a bus. Renew your medical certificate before it expires—do not wait until your CDL renewal date.

If you receive certain traffic violations or are convicted of a crime, you may lose your B endorsement when ready. Violations that can result in disqualification include driving under the influence, reckless driving, leaving the scene of an accident, or using a bus in a felony. Your state's DMV will notify you if your endorsement is suspended or revoked.

Frequently Asked Questions

Can I get a B endorsement if I have a DUI on my record?

It depends on how long ago the DUI occurred and your state's rules. Most states disqualify drivers with a DUI within the past five to ten years. Some states have a permanent ban. Contact your state's DMV to learn the specific timeline and whether you may be able to petition for reinstatement after a waiting period.

Do I need a B endorsement to drive a school bus?

Yes. School bus drivers must have a B endorsement on their CDL. Some states also require a separate school bus endorsement (often called an S endorsement) in addition to the B. Check with your state's DMV and your school district to confirm all required endorsements.

What happens if I drive a bus without a B endorsement?

You are breaking the law. You can be cited, fined, and your CDL can be suspended. Your employer can also face penalties. If you are currently driving a bus without the endorsement, contact your state's DMV when ready to begin the testing process.

Can I take the skills test in a different type of bus than the one I will drive for work?

Yes. The skills test can be taken in any bus or bus-sized vehicle, as long as it meets the state's size and weight requirements. However, once you are hired, your employer may require you to pass an additional company-specific training before you drive their buses.

How long is a B endorsement valid?

A B endorsement is valid for the same period as your CDL—usually four to eight years depending on your state and age. Your medical certificate must also remain valid. If either expires, you cannot legally drive a bus until you renew both.