What a Class B License Lets You Drive

A Class B driver's license authorizes you to operate single vehicles with a gross vehicle weight rating (GVWR) between 26,001 and 33,000 pounds. This category sits between a standard Class C passenger vehicle license and a Class A commercial truck license. The exact definition varies slightly by state, but the core rule is consistent: Class B covers medium-duty trucks and some buses that don't require a full commercial Class A endorsement.

Common vehicles you can drive with a Class B license include delivery trucks, small dump trucks, box trucks used for moving or retail, and some transit buses. You cannot drive a tractor-trailer combination or any vehicle requiring air brake certification unless you pass the additional air brake test. If you drive a vehicle heavier than 33,000 pounds or tow a trailer over a certain weight, you'll need a Class A license instead.

The distinction matters because Class B vehicles are often used for local or regional work—not long-haul interstate trucking. Many employers in delivery, waste management, and small fleet operations hire drivers with Class B licenses specifically because the training and testing requirements are less extensive than Class A, but the vehicle capacity is still substantial.

Key Takeaways

  • A Class B license covers vehicles weighing 26,001 to 33,000 pounds GVWR, including delivery trucks, box trucks, and some buses.
  • You must pass a written knowledge test, a skills test (driving exam), and a vision and medical screening specific to commercial driving.
  • Most states require you to hold a valid Class C license for at least one year before you can test for Class B, though some waive this for certain applicants.
  • The testing process typically takes several weeks from process to final license issuance, and fees range depending on your state.
  • If you fail any part of the test, you must wait a set period (usually 7 to 14 days) before retesting, and you may need to repeat all three components or only the failed section.

Prerequisites and Holding Requirements Before You Test

Before you can sit for a Class B test, your state's DMV will require proof that you meet baseline conditions. Nearly all states demand that you hold a valid, non-commercial Class C driver's license for a minimum period—typically one year, though some states allow as little as six months or as much as two years. A few states waive the holding period if you're a military veteran or if you're testing for a school bus endorsement.

You must also be at least 18 years old in most states, though some set the minimum at 21 for certain Class B vehicle types (particularly buses carrying passengers). Check your specific state's age rule because it can affect when you're may be able to access to test. Some states also require proof of residency, such as a utility bill or lease agreement, so have that ready when you visit the DMV.

Medical certification is another prerequisite. You'll need to complete a Department of Transportation (DOT) medical examination with a certified medical examiner. This exam checks your vision, hearing, blood pressure, and ability to safely operate a commercial vehicle. The examiner issues a Medical Certificate (Form MCSA-5875) valid for two years. You cannot test for Class B without this certificate, and you cannot legally drive a Class B vehicle without it.

The Written Knowledge Test and What It Covers

The Class B written test is a multiple-choice exam administered at your state's DMV. The number of questions varies by state—typically between 40 and 50—and you usually need to score 80 percent or higher to pass. The test covers vehicle operation, safety rules specific to medium-duty trucks, load securement, brake systems, and hazard recognition.

Study materials are provided free by your state DMV, usually in the form of a Commercial Driver's License (CDL) manual or Class B study guide available online or in print at the DMV office. The manual is specific to your state because traffic laws and road signs vary. You can take practice tests online through your state's DMV website or third-party sites that mirror the official format. Most people spend two to four weeks studying before testing.

The test is offered at your local DMV office during regular business hours. You'll need to bring your valid Class C license, your DOT Medical Certificate, proof of residency, and a completed process form (the name and number vary by state). Some states allow you to schedule the test online; others require you to show up in person or call ahead. Check your state's DMV website for the exact booking process.

The Skills Test: Pre-Trip Inspection, Backing, and Road Driving

After you pass the written test, you'll schedule a practical driving exam. This test has three parts: a pre-trip vehicle inspection, a backing maneuver test, and an on-road driving evaluation. The entire exam usually takes 45 minutes to an hour and is conducted by a state-certified examiner who rides with you in the vehicle.

The pre-trip inspection requires you to walk around and point out critical safety components—lights, tires, brakes, mirrors, wipers, and fluid levels. You don't have to fix anything; you just have to identify what's there and what's working. Examiners are testing whether you know what to check before you drive, not whether you're a mechanic. Study the vehicle inspection checklist in your state's CDL manual and practice on the actual truck you'll use for the test.

The backing maneuver tests your ability to reverse the vehicle into a marked space or around obstacles. For Class B vehicles, this is usually a straight-line backup or an offset backup (backing into a space to the side). You'll be graded on your control, use of mirrors, and whether you stay within the marked boundaries. This section trips up many test-takers, so practice repeatedly on the same vehicle type you'll use for the exam.

The on-road driving portion takes place on public roads and includes normal driving, turns, lane changes, stopping, and hazard response. The examiner will direct you to specific locations and watch how you handle traffic, pedestrians, and unexpected situations. You must follow all traffic laws exactly—a single violation can result in an automatic fail.

Retesting Rules and Waiting Periods If You Fail

If you fail the written test, most states allow you to retake it after a waiting period of 7 to 14 days. Some states let you retake it the next business day. Check your state's specific rule before you schedule your first attempt. When you retake the written test, you usually must answer all questions again, not just the ones you missed.

If you fail the skills test, the waiting period is typically longer—14 to 30 days—because the test requires scheduling with an examiner and a vehicle. Some states require you to retake all three components (pre-trip, backing, and road driving) even if you only failed one section. Others allow you to retake just the failed portion. Confirm this with your state DMV before your first attempt so you know what to expect if you don't pass.

Each retake requires you to pay the test fee again. Fees vary widely by state—from $50 to $200 per attempt—so budget for the possibility of needing two or three tries. The written test is usually cheaper than the skills test because it doesn't require an examiner's time.

Timeline From process to License Issuance

The entire process from submitting your process to receiving your Class B license typically takes four to eight weeks, depending on how quickly you schedule your tests and how many attempts you need. Here's a realistic breakdown: one to two weeks to gather documents and schedule the written test, one to two weeks between passing the written test and scheduling the skills test, and one to two weeks after passing the skills test for the DMV to process and mail your license.

If you fail either test, add another two to four weeks for each retake. Some states issue a temporary Class B permit after you pass the written test, allowing you to practice driving the vehicle with a licensed supervisor. This permit is usually valid for 30 to 60 days and can help you prepare for the skills test without waiting for your full license.

Expedited processing is not available for Class B licenses in most states, but a few states offer rush mail delivery for an additional fee. Check your state's DMV website to see whether this option exists where you live. If you need the license quickly for a job, ask your employer whether they can wait the standard timeline or whether they'll cover rush fees.

State-by-State Differences in Class B Requirements

While the federal framework for Class B licenses is consistent, states implement their own variations in holding periods, test content, medical requirements, and fees. Some states call it a "Class B" license; others use terms like "Medium-Duty Truck" or "Commercial Class B." A few states have eliminated the Class B category entirely and require all medium-duty vehicles to be driven under a Class A license.

Holding period requirements differ significantly. California requires one year of Class C driving before Class B testing; Texas allows six months. Some states waive the holding period for military veterans or school bus drivers. Medical certification standards are federally mandated, but the cost of the DOT exam varies by state and provider—typically $75 to $150.

Test fees also vary. Written test fees range from $10 to $50; skills test fees range from $50 to $200. Some states bundle these into a single fee; others charge separately. Before you begin the process, visit your state's DMV website and note the exact fees, required documents, and any state-specific rules that might affect your timeline or may be able to access.

Frequently Asked Questions

Can I use my personal vehicle for the Class B skills test?

No. You must use a vehicle that matches the Class B weight category you're testing for. The vehicle must be registered, insured, and in safe working condition. Many testing centers have approved vehicles available for a rental fee if you don't own one. Contact your local DMV to ask whether they maintain a list of rental vehicles or testing facilities.

What happens if I pass the written test but fail the skills test?

Your written test score remains valid for a set period—usually 90 days to one year, depending on your state. You can retake the skills test without retaking the written test, as long as you do so before your written test score expires. If it expires, you'll need to pass the written test again before you can attempt the skills test.

Do I need air brake certification for a Class B license?

Only if the vehicle you drive has air brakes. If it does, you must pass an additional air brake knowledge test and demonstrate air brake operation during your skills test. If the vehicle has hydraulic brakes only, you don't need air brake certification. Ask your employer or the vehicle owner which brake system the truck uses before you study.

Can I get a Class B license if I have a suspended or revoked Class C license?

No. You must have a valid, non-suspended Class C license to test for Class B. If your Class C license is suspended or revoked, you must resolve that issue first—usually by paying fines, completing a safety course, or waiting out the suspension period—before you can move forward with Class B testing.

How long is a Class B license valid once I receive it?

Class B licenses are typically valid for four to eight years, depending on your state and your age. Your DOT Medical Certificate must be renewed every two years, so even if your license hasn't expired, you cannot legally drive a Class B vehicle without a current medical certificate. Plan to renew your medical certification before it expires to avoid a gap in your driving authorization.