What a bus driver's license is and who needs one

A commercial driver's license (CDL) with a passenger endorsement is the legal requirement to drive a bus that carries passengers for money. This includes city transit buses, school buses, tour buses, and shuttle services. If you drive a bus with more than 15 passengers (including the driver), you must have this license — it is not optional, and driving without one is a criminal offense in every state.

The passenger endorsement is separate from the base CDL. You first obtain a CDL by passing written and driving tests, then add the passenger endorsement by passing an additional written test specific to passenger safety and procedures. Some states combine these into a single test sequence; others require you to pass the base CDL first, then return for the passenger test.

School bus drivers in most states need a separate school bus endorsement (often called an "S" endorsement) in addition to the passenger endorsement. The requirements and testing vary by state, so confirm with your state's Department of Motor Vehicles (DMV) or equivalent agency before you begin.

Key Takeaways

  • You must hold a valid CDL with a passenger endorsement to legally drive any bus carrying more than 15 passengers for compensation.
  • The process involves obtaining a regular CDL first, then adding the passenger endorsement through a separate written test.
  • School bus drivers need an additional school bus endorsement in most states, with its own medical and background requirements.
  • Medical certification and a clean driving record are required before you can test; some states also require fingerprinting and background checks.
  • The entire process typically takes four to eight weeks from start to CDL issuance, depending on your state and how quickly you pass the tests.

Prerequisites before you can test for a CDL

Before you walk into a testing facility, your state's DMV will require proof that you meet basic conditions. You must be at least 18 years old (21 in some states for interstate driving), hold a valid regular driver's license, and have a clean driving record with no disqualifying violations in the past three to five years. Disqualifying violations include DUIs, reckless driving, and certain traffic convictions — your state's DMV website lists the full set.

You will also need a medical certificate from a certified medical examiner. This is not a full physical; it is a brief check to confirm you can safely operate a large vehicle — vision and hearing tests, blood pressure check, and a review of any medications that might impair driving. The examiner fills out a form (MCSA-5875 in most states) that you bring to the DMV. This certificate is valid for two years and must be current when you test and when you renew your CDL.

Some states require fingerprinting and a background check before you test. School bus drivers face stricter background requirements in all states, including checks for criminal history and sex offender registry status. Check your state's DMV website or call their commercial driver services line to confirm what you need before scheduling anything.

Getting your commercial driver's license (CDL) first

The CDL is a two-part process: a written knowledge test and a behind-the-wheel driving test. You cannot take the driving test until you pass the written test and obtain a commercial learner's permit (CLP). The CLP allows you to practice driving a commercial vehicle with a licensed CDL holder in the passenger seat.

The written test covers vehicle inspection, safe driving practices, air brake systems (if you will drive a bus with air brakes), and hazmat rules. Most states allow you to take this test at any DMV office. You can study using your state's CDL manual, which is free online, or through third-party study guides and practice tests. The test is usually 50 questions, and you must score at least 80 percent to pass.

After you pass the written test, you receive your CLP and can begin practicing. Most states require you to hold the CLP for at least one week before you can test for the driving portion, though some have no waiting period. The driving test itself takes 30 to 45 minutes and includes a vehicle inspection walk-around, basic control maneuvers, and on-road driving. You must bring a commercial vehicle to the test — your employer, a driving school, or a private owner can provide one.

Adding the passenger endorsement

Once you hold a CDL, you add the passenger endorsement by passing a written test focused on passenger safety, boarding procedures, and emergency evacuation. This test is shorter than the base CDL test — typically 20 to 30 questions — and covers topics like how to handle disruptive passengers, wheelchair securement, and what to do if a passenger becomes ill or injured during the route.

You do not need to take another driving test for the passenger endorsement. The written test alone is sufficient. In some states, you can take this test on the same day you pass your CDL driving test; in others, you must wait a few days for the system to process your CDL before you can test for the endorsement. Check your state's rules before scheduling.

After you pass the passenger endorsement test, the DMV issues a new CDL card with the passenger endorsement printed on it. This usually happens within one to two weeks. Until you receive the physical card, you may receive a temporary paper permit that you can carry while driving.

School bus endorsement requirements (if applicable)

If you plan to drive a school bus, you need an additional school bus endorsement (the "S" endorsement in most states). This endorsement requires a separate written test covering student management, loading and unloading procedures, and emergency protocols specific to school transportation. The test is typically 20 questions.

School bus drivers also face stricter medical and background requirements than other bus drivers. Many states require annual medical recertification rather than the standard two-year cycle. You must pass a background check that includes fingerprinting, a criminal history search, and a sex offender registry check. Some states also require a child abuse and neglect registry check. These checks can take two to four weeks to complete.

Once you pass the school bus endorsement test and clear the background checks, the endorsement is added to your CDL. You will receive an updated card in the mail. Some school districts also require additional training or certification beyond the state CDL requirements — ask your employer what their specific requirements are before you begin the state process.

Timeline and testing locations

The entire process from your first DMV visit to holding a CDL with passenger endorsement typically takes four to eight weeks. This timeline assumes you pass all tests on your first attempt and that background checks (if required) process without delays. If you need to retake any test, add two to four weeks per attempt. School bus endorsement adds another two to four weeks due to background check processing.

You can take the written tests at any DMV office in your state. The driving test must be scheduled at a DMV facility that administers commercial driving tests — not all DMV locations do this. Call ahead or check your state's DMV website to find the nearest testing location and current wait times. Some states have long backlogs for driving tests, so schedule as soon as you pass the written test.

If you fail a test, you can usually retake it within a few days to a week. There is no limit on how many times you can test, but each attempt costs a fee (typically $10 to $50 per test). Some states allow you to take practice tests online or at a third-party testing center before attempting the official DMV test.

What happens after you receive your CDL

Once you hold a CDL with a passenger endorsement, you can legally drive a bus for any employer that hires you. Your CDL is valid for four to eight years depending on your state. Before it expires, you must renew it at the DMV — renewal usually requires passing the written test again and updating your medical certificate, though some states waive the written test for renewals if you have a clean record.

Your employer may require additional training beyond the state CDL requirements. Many transit agencies, school districts, and tour companies have their own safety training programs, defensive driving courses, or customer service training that you must complete before your first day. This training is separate from the CDL and is not part of the state licensing process.

Keep your medical certificate current. If it expires, your CDL becomes invalid even if the card itself has not expired. Renew your medical certificate every two years (or annually if you have a school bus endorsement) by visiting a certified medical examiner and bringing the updated form to the DMV.

Frequently Asked Questions

Can I get a CDL if I have a DUI or reckless driving conviction?

Most states disqualify you for three to five years after a DUI or reckless driving conviction. After that waiting period, you may be able to test, but the conviction will remain on your record. Some employers will not hire you regardless of state rules. Check your state's DMV website for the specific disqualifying violations and waiting periods.

Do I need to attend a driving school to get a CDL?

No, but many people do. You can study the manual on your own and practice with a licensed CDL holder. However, professional CDL schools provide structured training, practice tests, and access to a commercial vehicle for the driving test, which many people find helpful. Schools typically cost $3,000 to $7,000 and take two to six weeks.

What if I fail the driving test?

You can retake it as soon as your state allows — usually within a few days to a week. There is no limit on attempts. Each retake costs a fee. Many people pass on the second or third attempt after additional practice with a CDL holder or a professional instructor.

Do I need air brake certification to drive a bus?

Most buses have air brakes, so you will need to pass the air brake test as part of your CDL written exam. If you take the test without air brake certification, your CDL will have a restriction that prohibits you from driving vehicles with air brakes. This restriction makes you unhirable for most bus positions.

How much does it cost to get a bus driver's license?

State fees vary widely — typically $50 to $200 for written tests and $100 to $300 for the driving test. Medical certification costs $50 to $150. If you attend a professional CDL school, add $3,000 to $7,000. Background checks and fingerprinting (for school bus drivers) add $50 to $200. Total cost ranges from $300 to $7,500 depending on whether you use a school and your state's fees.