What a Class B license covers and who needs one

A Class B license lets you drive single vehicles — not combinations — that weigh more than 26,001 pounds. The most common Class B vehicle is a straight truck: a dump truck, delivery truck, or box truck where the cargo and cab are one unit. You might also drive a large bus, a motor home, or a vehicle towing a trailer under 10,000 pounds.

You need a Class B if your job involves driving these vehicles commercially or if you own one and drive it regularly. If you drive a pickup truck for personal use, even a heavy one, you do not need a Class B — a regular Class D license covers that. The line is the vehicle's Gross Vehicle Weight Rating (GVWR), which is printed on a sticker inside the driver's door or on the registration.

The main difference between Class B and Class A is that Class A covers combinations — a tractor pulling a trailer — while Class B does not. If you drive a semi truck, you need Class A instead.

Key Takeaways

  • A Class B license is for single vehicles over 26,001 pounds, such as straight trucks and large buses, but not for combinations like semi trucks.
  • You must pass a written knowledge test specific to Class B vehicles, a skills test behind the wheel, and a vision and medical exam.
  • Most states require you to hold a valid Class D license first and be at least 18 years old, though some states allow 17-year-olds with parental consent.
  • The written test covers braking systems, cargo securement, vehicle inspection, and safe operation of heavy vehicles.
  • You will need to bring documents proving your identity, residency, and Social Security number, plus proof of medical clearance if your state requires it.

Age requirements and when you can start

Most states require you to be at least 18 years old to get a Class B license. A few states allow 17-year-olds to get one with written parental consent, but this varies by state. You should check your state's Department of Motor Vehicles website or call your local office to confirm the minimum age where you live.

You must also hold a valid Class D (regular passenger vehicle) license before you can get a Class B. You cannot skip straight to Class B — the state wants to see that you already know how to drive safely. If your Class D license is suspended, revoked, or expired, you will need to renew or restore it first.

The written knowledge test for Class B

The Class B written test is longer and harder than the Class D test because heavy vehicles behave differently. You will answer questions about air brakes, hydraulic brakes, load securement, vehicle inspection, and how to handle emergencies in a large truck. The test usually has 50 questions, and you typically need to score 80 percent or higher to pass.

Most states provide a free study guide — often called the Commercial Driver's License (CDL) manual or the Class B manual — on the DMV website. You can read it, read it at home, and take practice tests online. Some DMV offices also offer in-person study sessions or let you take the test on a computer at the office itself.

The test covers topics like how air brakes work differently from regular brakes, how to inspect a vehicle before driving, how to find cargo so it does not shift, and what to do if your brakes fail on a hill. These are not trick questions — they test whether you understand the real hazards of driving a heavy vehicle.

The skills test and what the examiner watches for

After you pass the written test, you schedule a behind-the-wheel skills test with a state examiner. You bring a Class B vehicle — usually a truck that meets the weight requirement — and the examiner watches you perform specific maneuvers and drive on public roads. The test usually takes 45 minutes to an hour.

The examiner will ask you to do a pre-trip inspection: walk around the vehicle, check the lights, mirrors, tires, and brakes, and explain what you are looking for. Then you will drive through city streets, highways, and possibly backing maneuvers. The examiner is watching for smooth steering, proper mirror use, safe following distance, and whether you can handle the vehicle's size and weight.

You must bring proof that the vehicle is insured and registered. If you fail the skills test, you can retake it, but you usually have to wait a few days and pay a retest fee. Most people pass on the second or third attempt if they have practiced.

Medical exam and vision requirements

Some states require a medical exam before you get a Class B license. The exam checks your hearing, vision, blood pressure, and whether you have any conditions that would make it unsafe to drive a heavy vehicle. You see a doctor or nurse, not the DMV, and the doctor fills out a form that you bring to the DMV.

Vision requirements are stricter for Class B than for Class D. You typically need at least 20/40 vision in each eye (with or without glasses), and your field of vision must be at least 70 degrees in each direction. If you wear glasses or contacts, you must wear them during the vision test and during the skills test.

Not all states require a medical exam for Class B — some only require it if you are over a certain age or if you have a medical condition. Check your state's rules before you schedule your appointment, because if you show up without a medical clearance and your state requires one, you will have to leave and come back.

Documents you need to bring

Bring your current Class D license, proof of identity (a passport or state ID), proof of residency (a utility bill or lease in your name), and your Social Security number or an ITIN. If your state requires a medical exam, bring the completed medical form from your doctor. If you are under 18, bring written parental consent if your state allows it.

Some states also ask for proof of citizenship or legal residency. If you were born outside the United States, bring your birth certificate, passport, or naturalization papers. Call your local DMV office before you go — the exact list varies by state, and showing up without the right documents means another trip.

Cost and how long it takes

The cost of a Class B license varies widely by state. The written test fee is usually between $10 and $50. The skills test fee is typically $50 to $150. The license itself costs $20 to $100 depending on how long it is valid. A medical exam, if required, costs $50 to $150 and is usually paid to the doctor, not the DMV.

The whole process — from studying to passing both tests — usually takes two to four weeks if you study steadily and pass on your first try. If you need to retake the skills test, add another week or two. Some DMV offices have long wait times for skills tests, so call ahead to see how far out the appointments are booked.

Frequently Asked Questions

Can I use my own truck for the skills test?

Yes, as long as it meets the weight requirement and is insured and registered. The vehicle must have working brakes, lights, mirrors, and a horn. Some people borrow a truck from their employer or a friend. The examiner does not care who owns it — they just need to see that you can operate it safely.

What happens if I fail the skills test?

You can retake it after a waiting period, usually three to seven days depending on your state. You pay the retest fee again. Most states let you retake it as many times as you need, though a few cap the number of attempts per year. Your written test score stays valid, so you do not have to retake that part.

Do I need a Class B if I drive a heavy pickup truck?

No. A pickup truck, even a large one, is usually rated under 26,001 pounds GVWR. Check the sticker on your driver's door or your registration to be sure. If it is under that weight, a regular Class D license is all you need.

Can I get a Class B online?

You can take the written test online in some states, but you must take the skills test in person with a state examiner. You cannot get a Class B without passing the behind-the-wheel test — there is no way around it.

How long is a Class B license valid?

Most states issue Class B licenses for four to eight years, depending on your age and the state. When it expires, you renew it at the DMV. If you have not had any violations or accidents, renewal is usually just a vision test and a fee — you do not have to retake the skills test.