Class A and Class B are based on the vehicle or combination's weight ratings, not simply the size of the truck. The right choice depends on the equipment you plan to operate and the jobs available in your market.
Federal class definitions
| License | Core definition | Common examples |
|---|---|---|
| Class A | A combination with a gross combination weight rating of 26,001 pounds or more when the towed vehicle has a gross vehicle weight rating over 10,000 pounds. | Tractor-trailers, many flatbeds, tank combinations, and some heavy equipment combinations. |
| Class B | A single vehicle with a gross vehicle weight rating of 26,001 pounds or more, or that vehicle towing one rated at 10,000 pounds or less. | Straight trucks, many dump trucks, large box trucks, and some buses with the required endorsement. |
| Class C | A vehicle outside Class A or B that is designed for 16 or more people including the driver, or carries federally regulated hazardous material requiring placards. | Some passenger vehicles and smaller placarded hazmat vehicles. |
Choose Class A when...
- You want the broadest access to tractor-trailer jobs.
- OTR, regional, dedicated, flatbed, reefer, tanker, or intermodal work is your target.
- You may need to tow equipment with a rating over 10,000 pounds.
- You are prepared to test in representative combination equipment.
Choose Class B when...
- Your target employer uses straight trucks or other qualifying single vehicles.
- You want local delivery, construction, utility, refuse, or certain transit work.
- You have confirmed that the local jobs you want do not require a Class A combination.
- A shorter equipment-specific path fits your plan better than a broad tractor-trailer path.
Training and testing
First-time Class A and Class B applicants are subject to federal Entry-Level Driver Training. ELDT sets curriculum and provider requirements but does not impose a federal minimum number of classroom or behind-the-wheel hours. The provider must be registered, and training completion must be recorded before the applicable skills test.
Test equipment affects restrictions. For example, testing in an automatic-transmission CMV can produce an E restriction, and failing to test with a full air-brake system can limit the vehicles you may operate. Choose the training vehicle with the jobs you want in mind.
Can you upgrade from B to A?
Yes, but a Class B holder upgrading to Class A must complete the applicable Class A ELDT and pass the required state tests. Starting with B can be sensible when a specific employer is ready to hire you, but it is not automatically cheaper if you soon return for a Class A upgrade.
Decision checklist
- Collect 10 current job postings in your commuting area.
- Record the required class, endorsements, transmission, and air-brake requirements.
- Verify training providers and the equipment used for the skills test.
- Compare total tuition, fees, travel, and time away from work.
- Choose the license that matches real job demand, not a generic promise.
After choosing a class, follow the complete CDL application process and compare open CDL jobs by location and route.