Yes. To drive a school bus in the United States you need a Commercial Driver’s License, and in almost every case that means a Class B CDL carrying two endorsements: Passenger (P) and School Bus (S). A regular driver’s license is not enough, even for a smaller yellow bus and even if the bus is empty. Alongside the license itself, you’ll need to pass a DOT medical exam, clear a background check, and complete federally mandated training before you can carry students.
Why a Regular License Won’t Do
Federal regulations define a commercial motor vehicle to include any vehicle designed to carry 16 or more people, counting the driver.1eCFR. 49 CFR Part 383 – Commercial Driver’s License Standards; Requirements and Penalties School buses sit squarely inside that definition. The Federal Motor Carrier Safety Administration has confirmed that even driving an empty school bus on a public road requires a CDL with at least a Passenger endorsement.2Federal Motor Carrier Safety Administration. Do the Regulations Require That a Person Driving an Empty School Bus Obtain a CDL The bus’s designed capacity is what triggers the requirement, not whether kids are actually on board that day.
Class B or Class C: Which CDL You Need
The right class of CDL depends on how much the bus weighs. Federal rules split commercial vehicles into groups by gross vehicle weight rating.3eCFR. 49 CFR 383.91 – Commercial Motor Vehicle Groups
- A Class B CDL covers a single vehicle weighing 26,001 pounds or more. Most full-size yellow school buses land here.
- A Class C CDL covers vehicles under 26,001 pounds that are designed to carry 16 or more passengers including the driver. Smaller and some mid-size buses fit this category.
A Class B license also lets you drive the lighter Class C vehicles, so it’s the more flexible credential. Because school districts overwhelmingly run full-size buses, Class B is what most new drivers pursue.
When a CDL Isn’t Required
Some districts use small vans or mini-buses that seat fewer than 16 people including the driver and weigh under 26,001 pounds. Those don’t meet the federal definition of a commercial motor vehicle for CDL purposes, so federal law doesn’t require a CDL to drive them. State rules are a different matter. Some states impose their own licensing, training, and background check requirements for drivers of these smaller school vehicles, so check with your state’s motor vehicle agency before assuming a regular license is enough.
The Two Endorsements: P and S
A plain CDL by itself doesn’t authorize you to transport students. You need two endorsements added to the license, each with its own knowledge test and skills test.4eCFR. 49 CFR 383.93 – Endorsement Requirements
- The Passenger (P) endorsement is required for any vehicle designed to carry 16 or more passengers.
- The School Bus (S) endorsement is required whenever you transport students to or from school or to and from school-sponsored events.
The S endorsement knowledge test covers loading and unloading students, emergency evacuation, railroad crossings, and the proper use of mirrors and warning equipment like stop arms and flashing lights.5eCFR. 49 CFR 383.123 – Requirements for a School Bus Endorsement
There’s one narrow situation where only the P endorsement is needed: driving an empty school bus, delivering a bus from a manufacturer, or carrying a group of adults to a non-school event.6Federal Motor Carrier Safety Administration. Are Drivers Required to Have Both the P Passenger and S School Bus Endorsement In practice, most districts require both endorsements for every driver because routes and assignments shift.
The Other Requirements That Come With the CDL
The license itself is one piece. Federal law also attaches a set of ongoing qualifications for anyone driving a school bus.
DOT Medical Exam
You must hold a valid medical examiner’s certificate showing you’re physically fit to operate a commercial vehicle.7eCFR. 49 CFR Part 391 – Qualifications of Drivers The exam is performed by a provider on FMCSA’s National Registry of Certified Medical Examiners. A standard certificate is good for two years. Certain health conditions shorten that: managed high blood pressure may bring a one-year certificate, and insulin-treated diabetes is limited to 12 months.
Some conditions can disqualify you outright, including vision loss, hearing loss, epilepsy, and uncontrolled insulin-dependent diabetes, though exemption programs exist for some of these.8Federal Motor Carrier Safety Administration. What Medical Conditions Disqualify a Commercial Bus or Truck Driver If you know you have a condition that might be a problem, look into FMCSA’s medical variance and exemption process before paying for training.
Age
You must be at least 21 to drive a commercial vehicle across state lines.9Federal Motor Carrier Safety Administration. What Is the Age Requirement for Operating a CMV in Interstate Commerce For routes that stay inside one state, most states allow CDL holders as young as 18, but some hold the line at 21. Because school bus routes rarely cross state lines, your state’s intrastate minimum is the one that matters.
Drug and Alcohol Testing
School bus drivers fall under mandatory drug and alcohol testing rules covering all CDL holders in safety-sensitive work.10eCFR. 49 CFR Part 382 – Controlled Substances and Alcohol Use and Testing You’ll be tested before you start, at random throughout your employment, after certain accidents, and any time a supervisor has reasonable cause to suspect impairment. Violations are recorded in FMCSA’s Drug and Alcohol Clearinghouse, which employers must check before hiring you and at least once a year while you’re on the job.11Department of Transportation: Drug & Alcohol Clearinghouse. Drug and Alcohol Clearinghouse FAQ Topics
Background Check and Disqualifying Offenses
Every state runs criminal history and driving record checks on school bus drivers, and federal law lists convictions that automatically disqualify your CDL whether they occurred in a commercial vehicle or your personal car.12eCFR. 49 CFR 383.51 – Disqualification of Drivers A first DUI, leaving the scene of an accident, using a vehicle to commit a felony, or refusing an alcohol test brings a one-year disqualification. A second such conviction brings a lifetime disqualification, with most states allowing reinstatement after 10 years and a rehabilitation program. Drug trafficking using any vehicle brings a lifetime disqualification with no reinstatement. Serious traffic violations like excessive speeding, reckless driving, and improper lane changes trigger shorter suspensions when they stack up. States often add their own disqualifying offenses, particularly crimes involving children, so a clean federal record isn’t the whole picture.
How to Actually Get the License
Four phases stand between a regular license and a school bus behind the wheel.
Get a Commercial Learner’s Permit
Pass three written knowledge tests at your state DMV: general CDL, Passenger endorsement, and School Bus endorsement. That earns you a Commercial Learner’s Permit, valid for up to one year.13eCFR. 49 CFR 383.25 – Commercial Learner’s Permit With the CLP you can practice in a school bus, but a licensed CDL holder must be in the seat directly behind you or next to you, and you can’t carry student passengers during this phase.
Complete Entry-Level Driver Training
Before you can take the skills test, you must complete Entry-Level Driver Training through a provider listed on FMCSA’s Training Provider Registry.14eCFR. 49 CFR Part 380 – Special Training Requirements ELDT has a theory component and a behind-the-wheel component, and a first-time Class B applicant with P and S endorsements has to complete ELDT for the class and for each endorsement. Many districts partner with training providers or run their own registered programs, and some cover the full cost for new hires. Ask before you pay for a private program.
Pass the Skills Test
You must wait at least 14 days after your CLP is issued before taking the skills test, which is performed in an actual school bus and has three parts: a pre-trip inspection of safety-critical components, basic vehicle control maneuvers, and on-road driving with an examiner.15eCFR. 49 CFR 383.113 – Required Skills
File Your Medical Certification
Your DOT medical certificate must be on file with your state licensing agency. As of June 2025, medical examiners report results electronically to FMCSA, which passes them on to your state.7eCFR. 49 CFR Part 391 – Qualifications of Drivers Confirm with your DMV that the certificate is showing on your record, because a missing filing can downgrade your CDL to a regular license.
Keeping the License Active
CDL renewal periods run four to eight years depending on the state, and typically involve a vision test and a fee rather than another full skills test. Your DOT physical has to be renewed before it expires, every two years for most drivers and more often for shortened certificates. Random drug and alcohol testing continues the entire time you hold the position, and your employer must query your Clearinghouse record at least once every 12 months.11Department of Transportation: Drug & Alcohol Clearinghouse. Drug and Alcohol Clearinghouse FAQ Topics Let the medical certificate lapse and the state will downgrade your CDL until you file a new one. Let the CDL itself expire without renewing on time and some states will make you retake the knowledge or skills tests to reinstate it.