To get a Class B CDL, you pass a DOT physical, obtain a Commercial Learner’s Permit by passing your state’s written knowledge tests, complete federally required Entry-Level Driver Training through a provider on the FMCSA registry, hold the permit for at least 14 days, and then pass a three-part skills test at your state DMV. Federal rules set the requirements; your state handles the testing and issues the license. Start to finish, expect a few weeks to a few months.
What a Class B CDL Covers
A Class B CDL authorizes you to drive any single vehicle with a gross vehicle weight rating of 26,001 pounds or more, and to tow a trailer of 10,000 pounds or less. It does not cover combination vehicles where the trailer alone exceeds 10,000 pounds (that’s Class A) or smaller commercial vehicles built for 16 or more passengers or hazardous materials (Class C).
In practice, a Class B qualifies you for straight trucks, city transit buses, school buses with the right endorsement, large dump trucks, concrete mixers, and box delivery trucks.
Age, Residency, and Documents
You must be at least 18 to drive a commercial vehicle within your home state and at least 21 to cross state lines or haul hazardous materials.1Federal Motor Carrier Safety Administration. What Is the Age Requirement for Operating a CMV in Interstate Commerce? You also need a valid non-commercial driver’s license, proof of state residency, and proof of U.S. citizenship, lawful permanent residency, or another qualifying immigration status. Lawful permanent residents must present a valid, unexpired permanent resident card. States pull their accepted documents from a federal table at 49 CFR 383.71, so bring government-issued identification rather than utility bills or bank statements.
Pass the DOT Physical
Before you can get a permit, you need a Department of Transportation physical from a medical examiner listed on the FMCSA’s National Registry.2Federal Motor Carrier Safety Administration. DOT Medical Exam and Commercial Motor Vehicle Certification Qualifying examiners include doctors of medicine or osteopathy, physician assistants, advanced practice nurses, and chiropractors, provided they appear on the registry. If you pass, you receive a Medical Examiner’s Certificate (Form MCSA-5876), valid for up to two years.3Federal Motor Carrier Safety Administration. For How Long Is My Medical Certificate Valid?
The exam applies fixed thresholds. Distant visual acuity must be at least 20/40 in each eye with or without corrective lenses, horizontal field of vision must reach at least 70 degrees in each eye, and you must be able to distinguish red, green, and amber. For hearing, you need to perceive a forced whisper at five feet in your better ear, or score no worse than a 40-decibel average loss at 500, 1,000, and 2,000 Hz on an audiometric test.4eCFR. 49 CFR 391.41 – Physical Qualifications for Drivers Certain conditions such as insulin-treated diabetes, epilepsy, or severe diabetic retinopathy can result in permanent disqualification from interstate driving.
DOT physicals generally cost between $50 and $200 and are usually self-pay, not covered by standard health insurance. Drug testing fees are separate.
Get Your Commercial Learner’s Permit
The CLP is your permission slip to practice. Bring your driver’s license, proof of residency, citizenship or immigration documents, and your Medical Examiner’s Certificate to your state’s DMV, and take the written knowledge tests.
Every Class B applicant takes the general CDL knowledge test. If the vehicle you plan to drive has air brakes, and most Class B vehicles do, you also take an air brake knowledge test. Skipping or failing the air brake test means your CLP and eventual CDL will carry a restriction barring you from driving any vehicle with air brakes.5eCFR. 49 CFR Part 383 – Commercial Driver’s License Standards Passenger and school bus endorsements each require their own knowledge test at this stage. State fees across the full CDL process range roughly from $30 to $350.
What to Study
Your state’s Commercial Driver’s License Manual is the single best resource, covering vehicle systems, cargo handling, safe driving techniques, air brake operation and inspection, and endorsement material. Focus on pre-trip vehicle inspection procedures, air brake components and failure indicators, and federal hours-of-service basics. Free practice tests based on your state’s manual are widely available online.
CLP Rules and the 14-Day Wait
A CLP is not a solo license. You can only operate a commercial vehicle on public roads when a qualified CDL holder with the right class and endorsements sits in the front passenger seat, or directly behind you in a bus, under their direct supervision. You cannot carry passengers other than your supervising CDL holder, examiners, and fellow trainees, and you cannot transport hazardous materials at all.6eCFR. 49 CFR 383.25 – Commercial Learner’s Permit (CLP)
Federal rules require you to hold the CLP for at least 14 days before you’re eligible for the skills test. The permit is valid for up to one year from issuance. If it expires before you pass, you retake the knowledge tests.7eCFR. 49 CFR 383.25 – Commercial Learner’s Permit (CLP)
Complete Entry-Level Driver Training
Federal regulations require every first-time Class B applicant to complete Entry-Level Driver Training before the skills test.8eCFR. 49 CFR Part 380 Subpart F – Entry-Level Driver Training Requirements On and After February 7, 2022 ELDT has two parts: theory instruction (classroom or online) and behind-the-wheel training on both a range and public roads. The provider must appear on the FMCSA’s Training Provider Registry, searchable at tpr.fmcsa.dot.gov, where you can filter by Class B programs in your area.9Federal Motor Carrier Safety Administration. FMCSA Training Provider Registry
One detail catches people off guard: federal rules set no minimum number of training hours for either the theory or behind-the-wheel portions of a Class B program.10Federal Motor Carrier Safety Administration. Training Provider Registry – Frequently Asked Questions The regulations prescribe topics the curriculum must cover (49 CFR Part 380, Appendices A through E) and require the training vehicle to represent the CDL class you’re seeking, but duration is up to the provider. Programs typically run one to four weeks. Costs generally fall between $1,500 and $5,000 depending on school, region, and included endorsements.
You don’t need to finish ELDT before getting your CLP. The sequence is: pass the knowledge tests and get your CLP, complete ELDT through a registered provider, then take the skills test.
Pass the Three-Part Skills Test
A state-approved examiner administers all three segments. Failing one means retaking at least that portion.
Pre-Trip Vehicle Inspection
You walk around the vehicle identifying components and explaining what you’re checking and why, covering the engine compartment, brakes, steering, suspension, tires, lights, and mirrors. The examiner looks for your ability to spot defects that would make the vehicle unsafe. A memorized, systematic routine is the best preparation.
Basic Vehicle Control
This segment tests maneuvering in a controlled environment. Expect exercises like straight-line backing, offset backing, and forward stop control. Exact maneuvers vary by state.
On-Road Driving
The road test puts you in real traffic. You demonstrate turns, lane changes, intersection navigation, highway merging, and proper stopping technique. The examiner evaluates observation, mirror usage, speed control, and judgment.
Choose Your Test Vehicle Carefully
The vehicle you test in shapes your license. Test in an automatic, and your CDL is restricted to automatic-equipped commercial vehicles. Test in a vehicle without air brakes, or fail the air brake knowledge test earlier, and your license carries an air brake restriction barring you from air-brake-equipped vehicles. Since most Class B jobs involve air brakes, that restriction can seriously narrow your employment options.5eCFR. 49 CFR Part 383 – Commercial Driver’s License Standards
Both restrictions can be removed later. To lift the air brake restriction, pass the air brake knowledge test and perform the air brake pre-trip inspection; you don’t have to retake the full skills test. To lift the automatic-only restriction, take a modified skills test in a manual vehicle. Testing in the right vehicle from the start saves time and money.
After You Pass
Once you clear all three segments, the examiner documents your results. Take that documentation back to the DMV with any remaining fees and they’ll issue your Class B CDL, usually same-day or within a few days depending on the state.
Endorsements You May Need
The base Class B covers the vehicle, but certain jobs require added endorsements. Adding any of these for the first time also requires endorsement-specific ELDT.8eCFR. 49 CFR Part 380 Subpart F – Entry-Level Driver Training Requirements On and After February 7, 2022
- Passenger (P) is required to carry 16 or more people, including the driver. You pass a written knowledge test and a driving skills test in a passenger-carrying vehicle.
- School Bus (S) requires the passenger endorsement first, plus a knowledge test covering student loading and unloading, emergency evacuation, and railroad crossings, and a skills test in an actual school bus. Many states impose their own background check requirements on top of federal rules.11eCFR. 49 CFR 383.123 – Requirements for a School Bus Endorsement
- Hazardous Materials (H) requires a knowledge test and a Transportation Security Administration background check.
Drug Testing and Disqualifying Offenses
Federal law requires employers to obtain a negative drug test before letting you operate a commercial vehicle for the first time. Once you’re working, expect random tests, post-accident tests after certain crashes, and reasonable-suspicion tests if a supervisor believes you may be impaired.12Federal Motor Carrier Safety Administration. When Does Testing Occur and What Tests Are Required? State licensing agencies query the FMCSA Drug and Alcohol Clearinghouse before issuing, renewing, or upgrading a CDL or CLP, so a recorded violation can block your license until you complete a return-to-duty process with a substance abuse professional.13Federal Motor Carrier Safety Administration. About the FMCSA Drug and Alcohol Clearinghouse
Certain convictions trigger automatic CDL disqualification under federal rules, even if you weren’t driving a commercial vehicle at the time. A first conviction for driving under the influence, leaving the scene of an accident, using a vehicle to commit a felony, or causing a fatality through negligent driving results in a one-year disqualification, and a second conviction for any of those means a lifetime ban. Using a CMV in a drug trafficking felony or a human trafficking crime carries a lifetime ban with no possibility of reinstatement.14eCFR. 49 CFR Part 383 Subpart D – Driver Disqualifications and Penalties Clearing your record of these issues before you apply is worth the effort.