What is the difference between a Class A and a Class B CDL?

Class A: Any combination of vehicles with a gross combination weight rating or gross combination weight of 26,001 pounds or more (whichever is greater), inclusive of a towed unit or units with a gross vehicle weight rating or gross vehicle weight of more than 10,000 pounds. Class B: Any single vehicle with a gross vehicle weight rating or gross vehicle weight of 26,001 pounds or more, or such a vehicle towing a vehicle not exceeding 10,000 pounds GVWR or gross vehicle weight.

Federal rules

CDL vs non-CDL: where federal law draws the line

Q: Does the CDL weight line change from state to state?

No. The classes are federal standards that every state implements when issuing licenses. A CDL is required for drivers in interstate, intrastate, or foreign commerce driving a vehicle that meets one of the CMV classifications. FMCSA does not issue CDLs; state governments do.

A CDL is required for drivers in interstate, intrastate, or foreign commerce driving a vehicle that meets one of the CMV classifications below. FMCSA does not issue CDLs; state governments do. The same weight line applies in every state because the classes are federal standards; the class definitions below decide for pickups, box trucks, and hotshot rigs alike.

By Haul Handbook editorial team· Updated Sep 7, 2026

The three federal CDL classes

Here is the line, straight from FMCSA. Weigh your combination against these definitions and you have your answer:

Class A: Any combination of vehicles with a gross combination weight rating or gross combination weight of 26,001 pounds or more (whichever is greater), inclusive of a towed unit or units with a gross vehicle weight rating or gross vehicle weight of more than 10,000 pounds.
Class B: Any single vehicle with a gross vehicle weight rating or gross vehicle weight of 26,001 pounds or more, or such a vehicle towing a vehicle not exceeding 10,000 pounds GVWR or gross vehicle weight.
Class C: Any single vehicle or combination that does not meet Class A or B but is designed to transport 16 or more passengers including the driver, or transports placarded hazardous materials or select agents.

Which weight belongs in the CDL test?

The Class A test compares rated and actual combination weight and also checks the towed unit’s rated or actual weight. Class B checks the single vehicle. Passenger capacity and hazardous materials can require a CDL even below the Class A and B weight thresholds.

Keep GVWR, the single-vehicle rating, separate from GCWR, the combination rating and the weight recorded on a scale ticket. For the CDL rules, GCWR is the greater of the power unit manufacturer’s value on its certification label or the highest total produced by the ratings and actual weights of the power unit and towed units. A power unit’s GCWR does not define its CMV status when it is not towing.

Illustration: a combination has a GCWR of 34,000 pounds and a trailer rated at 20,000 pounds. It meets the Class A weight test even when the truck and trailer are empty. A lighter trailer does not by itself establish a non-CDL operation: compare the applicable ratings and actual weights, then check the passenger and hazardous-material rules.

For Form 2290, taxable gross weight combines the equipped vehicle’s unloaded weight, customary trailers and maximum customary load. State-declared registration weight can also affect the figure. GVWR alone does not determine the tax weight. See the Form 2290 weight and filing guide for that separate tax calculation.

The hotshot rule

Hotshot setups, a heavy-duty pickup pulling a gooseneck, live right at the line, and the math decides it. Here is how FMCSA's definitions play out:

A hotshot combination needs a Class A CDL when the greater of its GCWR or actual combination weight reaches 26,001 pounds and the greater of the towed unit’s rating or actual weight exceeds 10,000 pounds. Check Class B for a heavy single vehicle and Class C for passenger or hazardous-material use. Federal registration requirements depend separately on the operation.

Check the registration rules for your vehicle and operation separately. Start with the USDOT number requirements and interstate operating authority guide when planning for-hire work across state lines.

Endorsements

Endorsements: T (double/triple trailers), P (passenger), N (tank vehicle), H (hazardous materials), X (tank plus hazmat), S (school bus).

Getting a CDL: the training rules

Drivers issued a CLP on or after February 7, 2022 who seek a first Class A or B CDL, an upgrade from Class B to A, or a first S, P, or H endorsement must complete entry level driver training with a provider registered in FMCSA's Training Provider Registry before testing.

A CLP must be held 14 days before taking the CDL skills test.

Once you know a CDL is what you need, the federal sequence runs from the commercial learner's permit through registered training to the skills test: how to get a CDL.

Non-CDL does not mean non-regulated

Staying under the CDL line changes the license, not the business. A for-hire interstate operation still registers with FMCSA, files for authority, and faces the new entrant safety audit. Employ CDL drivers and the Drug and Alcohol Clearinghouse applies too. Pricing out the whole setup? Start with what it costs to start a trucking company.