The Six Main License Classes and What They Let You Drive

Every state issues driver licenses in classes, and the class you hold determines what vehicles you can legally operate. The six classes you will encounter across the United States are Class A, Class B, Class C, Class D, Class M, and commercial classes (CDL). Not every state uses all six, and some states name them differently — but the vehicles each class covers are consistent enough that you can move between states and understand what your license permits.

Class A covers any vehicle, including tractor-trailers and buses, but requires a commercial driver license (CDL) and is not issued to ordinary drivers. Class B also requires a CDL and covers single-unit trucks and buses. Class C is the standard passenger vehicle license most people hold — it covers cars, light trucks, and vans under a certain weight. Class D is a restricted version of Class C, issued in some states to drivers with medical conditions or age limits. Class M is the motorcycle license, issued separately or as an endorsement to another class. Some states collapse these into fewer categories or use numbers instead of letters, but the vehicle restrictions remain the same.

Key Takeaways

  • Class C is the standard license for cars and light trucks; most adult drivers hold this class.
  • Class M covers motorcycles and is issued as a separate license or endorsement depending on your state.
  • Class A and Class B are commercial licenses (CDL) and require training, testing, and medical certification beyond a standard license.
  • Class D is a restricted license issued to drivers with medical conditions or age limits, and it may prohibit night driving or highway use.
  • Your state's DMV website lists the exact weight limits and vehicle types for each class, because definitions vary slightly by state.

Class C: The Standard Passenger Vehicle License

Class C is what most people mean when they say "driver license." It permits you to operate passenger cars, pickup trucks, vans, and small utility vehicles up to a certain weight — usually 26,000 pounds gross vehicle weight rating (GVWR). You can tow a trailer with a Class C license, but the combined weight of vehicle and trailer cannot exceed the state's limit, which ranges from 40,000 to 80,000 pounds depending on the state.

To get a Class C license, you must pass a written test on traffic laws, a vision test, and a driving test. Most states issue Class C to drivers age 16 or 17 with a learner permit, then convert it to an unrestricted license at age 18. Some states issue a graduated license — a Class C with restrictions on night driving, passenger limits, or phone use — that expires and converts to a full Class C after a set period, usually six months to two years.

Class C is valid for four to eight years depending on your state and age. Renewal is usually by mail or online if you have no violations and your vision is still acceptable. Some states require an in-person renewal every other cycle or at age 70.

Class M: Motorcycle and Moped Licenses

Class M permits you to operate motorcycles and, in some states, mopeds or motorized bicycles. The definition of what counts as a motorcycle varies — some states set a minimum engine size (often 50 cubic centimeters), and some distinguish between motorcycles and mopeds based on top speed or engine displacement. A few states issue Class M as a standalone license; most issue it as an endorsement added to a Class C or other license.

To get Class M, you must pass a motorcycle-specific written test and a riding test on an actual motorcycle. Many states offer a Motorcycle Safety Foundation (MSF) course that, when completed, waives or shortens the riding test. The written test covers motorcycle-specific rules: how to lean in turns, braking technique, visibility, and hazard awareness. Some states require you to own or have access to a motorcycle before you can test; others provide a test bike at the DMV.

Class M has no age minimum in most states, though some require you to be 16 or 18. A few states issue a restricted Class M to riders under 18 that prohibits passengers or highway riding. Renewal follows the same timeline as your underlying Class C license.

Class A and Class B: Commercial Driver Licenses (CDL)

Class A and Class B are commercial licenses. You cannot get either one without first holding a valid Class C license and passing a commercial driver license (CDL) test. These licenses are for people whose job involves operating large trucks or buses.

Class A covers tractor-trailers (semi-trucks), buses with more than 15 passengers, and any combination of vehicles where the trailer weighs more than 10,000 pounds. Class B covers single-unit trucks (dump trucks, box trucks, delivery trucks) and buses with more than 15 passengers, but not tractor-trailers. Both require a medical certificate from a Department of Transportation (DOT) physician, a written knowledge test, and a skills test (pre-trip inspection, basic control, and road test).

To get a CDL, you must be at least 21 years old (18 in some states for intrastate only). You must also pass a background check and provide proof of citizenship or legal residency. The written test is longer and harder than a standard license test — it covers air brakes, hazmat (if you want to carry hazardous materials), and vehicle-specific rules. The skills test is performed in the actual class of truck you want to drive.

A CDL is valid for four to eight years and requires renewal in person at the DMV, including a new medical certificate. Some states require a CDL holder to renew their medical certificate every two years even if the license itself is still valid.

Class D: Restricted Licenses for Medical or Age Limits

Class D is a restricted version of Class C issued to drivers who do not meet the full requirements for an unrestricted license. The most common reason is a medical condition — vision loss, hearing loss, or a physical disability that requires an adaptive device (hand controls, left-foot accelerator). A doctor must certify that you can drive safely with the restriction in place.

A Class D license typically comes with written restrictions printed on the card: "corrective lenses required," "hearing aid required," "hand controls only," or "daylight driving only." Some states also issue Class D to drivers over a certain age (often 85 or older) with a shorter renewal cycle — sometimes annual — to may support they continue to meet medical standards.

To get a Class D, you must provide a medical report from your doctor or an eye specialist. The DMV reviews the report and decides what restrictions are necessary. You still take the written and driving tests, but the driving test is conducted with your restriction in place — for example, if you need hand controls, the test is done in a vehicle with hand controls installed.

Endorsements and Restrictions: Adding to Your License

Beyond the main class, your license may carry endorsements (permissions to do something extra) or restrictions (limitations on what you can do). An endorsement is marked with a letter or code; a restriction is marked with a number or code and a description.

Common endorsements include M (motorcycle), H (hazmat), P (passenger bus), and T (double/triple trailers). To get an endorsement, you pass an additional written test and sometimes a skills test. You do not need a new license card in most states — the endorsement is added to your existing one at renewal or by request.

Common restrictions include "corrective lenses," "hearing aid," "automatic transmission only," "daylight driving only," and "no highway driving." Restrictions are imposed by the DMV based on your medical report or test performance, or you can request them yourself if you want to limit your own driving (for example, some new drivers ask for a "no passengers" restriction to help them focus).

How License Classes Differ by State

While the six main classes are used nationwide, state definitions vary in small but important ways. The weight thresholds for Class C versus Class B differ — some states set the cutoff at 26,000 pounds GVWR, others at 10,000 pounds. Towing limits vary widely. Motorcycle definitions differ: some states count mopeds as Class M, others issue a separate moped license or no license at all.

Your state's DMV website publishes a driver license handbook that lists the exact definitions and restrictions for each class. If you are moving to a new state or unsure what your current license permits, read the handbook for your state or call the DMV. If you hold a license from another state, you can usually transfer it without retesting, but the new state may reclassify it or add restrictions based on their own rules.

Frequently Asked Questions

Can I drive a pickup truck with a Class C license?

Yes, as long as the truck's gross vehicle weight rating (GVWR) is under your state's limit for Class C, usually 26,000 pounds. Most pickup trucks fall well under this. If the truck is heavier or you are towing a trailer, check your state's combined weight limit — you may need a Class B license.

Do I need a separate license for motorcycles or can I add it to my Class C?

It depends on your state. Most states issue Class M as an endorsement added to your Class C, so you have one card with both. A few states issue Class M as a separate license. Either way, you must pass a motorcycle-specific test to get it.

What happens if I drive a vehicle my license class does not permit?

You can be cited for driving without the proper class of license, which is a moving violation. The penalty varies by state but usually includes a fine and points on your record. If you cause an accident while driving an unpermitted vehicle, your insurance may not cover it.

Can I get a Class A or Class B license without being 21?

Most states require you to be 21 for a CDL. Some states allow 18-year-olds to get a CDL for intrastate driving only (within the state), but not for interstate. You must check your state's rules and your employer's insurance requirements.

If I have a medical restriction on my license, can I remove it later?

Yes. If your condition improves or you no longer need the adaptive device, you can request a new medical evaluation from your doctor. If the doctor certifies you no longer need the restriction, the DMV will issue a new license without it. You may need to retake the driving test to prove you can drive safely without the restriction.