To add a school bus endorsement to your CDL, you need to complete FMCSA-approved entry-level driver training and then pass two sets of tests at your state licensing agency: the knowledge and skills tests for the passenger (P) endorsement, and the knowledge and skills tests for the school bus (S) endorsement. Both letters must appear on your CDL before you can legally transport students. Everything else in the process — the medical exam, the background check, the Clearinghouse query, arranging a bus for the road test — exists to get you to those tests and keep you eligible afterward.
Both P and S Are Required
The S endorsement alone does not qualify you to drive a school bus full of students. Federal regulations require you to pass the knowledge and skills tests for a passenger vehicle (P) endorsement first, and then pass additional school-bus-specific tests on top of that.1eCFR. 49 CFR 383.123 – Requirements for a School Bus Endorsement The P endorsement covers general passenger transport safety. The S endorsement layers on school-bus-specific content like loading zones, student management, and evacuation procedures.
The FMCSA states it directly: drivers transporting students to and from school or school-sponsored events must hold both the P and S endorsements.2Federal Motor Carrier Safety Administration. Are Drivers Required To Have Both the P Passenger and S School Bus Endorsement When Not Transporting Students When you finish, both letters appear on your license.3eCFR. 49 CFR 383.153 – Information on the CDL Document and CLP
What You Need Before You Start
You must already hold a valid Class A or Class B CDL. The school bus endorsement is not a standalone license; it sits on top of an existing one.4eCFR. 49 CFR 383.93 – Endorsements For interstate routes you must be at least 21.5Federal Motor Carrier Safety Administration. What Is the Age Requirement for Operating a CMV in Interstate Commerce Some states allow intrastate school bus driving at 18, so check with your state licensing agency.
You also need a current DOT medical examiner’s certificate. The exam has to be performed by a provider listed on the FMCSA’s National Registry of Certified Medical Examiners. It covers vision, hearing, blood pressure, and general physical fitness for commercial driving. The certificate lasts up to 24 months, though the examiner can issue a shorter card if a condition needs monitoring.6Federal Motor Carrier Safety Administration. DOT Medical Exam and Commercial Motor Vehicle Certification
Expect a thorough background check. Most states require fingerprinting and a criminal history review. Disqualifying offenses and lookback periods vary by state, and federal CDL rules independently disqualify drivers for certain serious traffic and criminal violations. A pattern of violations on your driving record will stop the process early.
Once you are hired, your employer must run a full query of the FMCSA Drug and Alcohol Clearinghouse before you can drive. The Clearinghouse tracks drug and alcohol violations by CDL holders, and an unresolved violation blocks you from behind the wheel. Employers must also run an annual query on every driver they employ.7Federal Motor Carrier Safety Administration. Commercial Driver’s License Drug and Alcohol Clearinghouse A full query requires your electronic consent through the Clearinghouse system.8Drug & Alcohol Clearinghouse. Query Plans
Entry-Level Driver Training
Federal rules require you to complete entry-level driver training (ELDT) through an approved provider before you can take the state skills test for the S endorsement. This applies to anyone getting the school bus endorsement for the first time.9eCFR. 49 CFR Part 380 Subpart F – Entry-Level Driver Training Requirements
Training has two parts: classroom-style theory instruction, and behind-the-wheel (BTW) training that includes both range exercises and driving on public roads. Theory covers danger zones and mirrors, loading and unloading, emergency exits and evacuation, railroad crossings, student management, pre- and post-trip inspections, and school bus security.10eCFR. 49 CFR Part 380 – Special Training Requirements, Appendix D BTW puts that material into practice in an actual school bus.
There is no federally required minimum number of hours for either portion. Your provider decides when you have demonstrated proficiency across every element of the curriculum. States can add stricter requirements though, including minimum hours or extra certifications like CPR or first aid.11FMCSA Training Provider Registry. Frequently Asked Questions You have one year to finish both portions once you start the first one.9eCFR. 49 CFR Part 380 Subpart F – Entry-Level Driver Training Requirements
Verify your provider before you enroll. Every ELDT provider must be listed on the FMCSA’s Training Provider Registry, and you can search the registry at tpr.fmcsa.dot.gov.12FMCSA Training Provider Registry. href=”https://tpr.fmcsa.dot.gov/search” target=”_blank” rel=”noopener”>Find a Provider If your provider is not listed, the training will not count toward the endorsement.
The Knowledge Tests
You take two written tests at your state DMV or commercial licensing office: one for the P endorsement and one for the S endorsement. The passenger test covers general passenger transport. The school bus test focuses on four areas:1eCFR. 49 CFR 383.123 – Requirements for a School Bus Endorsement
- Loading and unloading children, including proper use of stop arms, mirrors, flashing lights, and other warning devices
- Emergency evacuation procedures and use of emergency exits
- Federal and state rules for stopping at and crossing railroad-highway grade crossings
- Other school bus operating practices not covered by the categories above
Your best study resource is the school bus section of your state’s CDL manual, which most state DMVs post free on their websites. The manual is written to match the test.
The Skills Tests
After passing both knowledge tests, you move to the driving portion. The CDL skills test has three segments.13eCFR. 49 CFR 383.113 – Required Skills
Pre-Trip Vehicle Inspection
You walk around the bus and identify each safety-related component while explaining what you are checking and why. That covers the engine compartment, steering, suspension, brakes, wheels, and the sides and rear. For the school bus endorsement specifically, you also have to demonstrate knowledge of school-bus features: stop arms, flashing warning lights, the passenger entry door, handrails, emergency exits, and emergency equipment such as first aid kits.13eCFR. 49 CFR 383.113 – Required Skills If the bus has air brakes, expect to run the air brake inspection sequence as well.
Basic Vehicle Control
This segment tests low-speed handling in a controlled setting: smooth starts and stops, straight-line backing, backing along a curved path, turning, lane positioning, and gear selection.13eCFR. 49 CFR 383.113 – Required Skills Specific maneuvers vary by state.
On-Road Driving
The final segment is on public roads or a course that simulates them. The examiner watches your visual search habits, signaling, speed adjustment for road and weather, lane changes, gap selection, and overall safe driving.13eCFR. 49 CFR 383.113 – Required Skills For the school bus endorsement, you must take this test in a school bus of the same vehicle group you intend to drive.1eCFR. 49 CFR 383.123 – Requirements for a School Bus Endorsement If you plan to drive a Type C conventional school bus, you need to test in one, not in a transit bus or a van.
Getting a Bus for the Test
You have to bring a school bus to the skills test. The DMV does not provide one. Most applicants come in through a school district or a contracted bus company that hires them, trains them, and supplies a bus for testing. Some states even require employer sponsorship before you can begin the endorsement process. If you are pursuing the endorsement independently, contact your testing site well in advance to confirm the exact vehicle requirements and to arrange access to a compliant bus for the road test.
Fees and How to Apply
Combined fees for the endorsement application, knowledge tests, and skills tests generally run between $50 and $150, and vary by state. Add the cost of the DOT physical, fingerprinting and background check fees, and any training tuition your employer does not cover. Many school districts and bus companies pay all or most of these costs during hiring, so ask before you pay out of pocket.
To apply, go to your state’s DMV or commercial licensing office with your current CDL, a valid medical examiner’s certificate, proof of identity, and any background check paperwork your state requires. Once your application is processed and both knowledge tests are passed, you can schedule the skills test. After you pass all segments, the S endorsement is added to your CDL, along with the P endorsement if you did not already hold it. Turnaround is usually the same day or within a few business days.
Keeping the Endorsement Active
Passing the tests is not the end of the obligation. Your DOT medical certificate has to stay current, meaning a new physical at least every 24 months, or sooner if the examiner sets a shorter interval.6Federal Motor Carrier Safety Administration. DOT Medical Exam and Commercial Motor Vehicle Certification Letting the card lapse downgrades your CDL, and you cannot drive a school bus until it is renewed.
Your employer will run an annual Clearinghouse query, so a clean drug and alcohol record is an ongoing condition of employment, not a one-time hiring check.7Federal Motor Carrier Safety Administration. Commercial Driver’s License Drug and Alcohol Clearinghouse Many states also require periodic refresher training for school bus drivers, ranging from annual safety updates to full recertification on a multi-year cycle. Your employer or state licensing agency can tell you exactly what applies.
The endorsement itself renews with your CDL, so there is no separate renewal application. If any underlying requirement lapses though — medical card, background clearance, refresher training — the endorsement is effectively unusable until you fix it.