What a Class A license is and who needs one
A Class A license lets you drive the largest commercial vehicles on public roads — tractor-trailers, semi-trucks, and other rigs that weigh more than 26,001 pounds. If you want to drive these vehicles for pay, you need a Class A. If you drive them without one, you face fines, license suspension, and potential criminal charges depending on your state.
You cannot jump straight to a Class A. Every state requires you to hold a valid Class B commercial driver's license first, then upgrade to Class A. The process takes weeks to months and involves written tests, a skills test, and a medical exam. Most people complete it through a commercial driving school, though you can study on your own and test through your state's Department of Motor Vehicles.
The cost varies by state and whether you use a school. A commercial driving school typically charges $3,000 to $7,000 for a full program. Testing fees through your DMV run $100 to $300. If you already hold a Class B, the upgrade path is faster than starting from scratch.
Key Takeaways
- You must hold a valid Class B commercial driver's license before you can get a Class A.
- Every state requires a written knowledge test, a skills test behind the wheel, and a Department of Transportation medical exam.
- Most people attend a commercial driving school, which takes four to eight weeks and costs $3,000 to $7,000.
- You can study on your own and test through your state's DMV, but you still need to pass the same exams and meet the same medical standards.
- Once you pass all tests, your state DMV issues your Class A license, usually within one to two weeks.
Getting your Class B license first
Before you can upgrade to Class A, you need a valid Class B commercial driver's license. If you already have one, skip to the next section. If not, you will need to pass a written test, a skills test, and a medical exam for Class B first.
The Class B written test covers vehicle operation, safety rules, and cargo handling. Your state's DMV provides a study manual free online. Most people spend two to four weeks studying before they test. You take the written exam at your local DMV office — it is multiple choice and usually takes one to two hours.
After you pass the written test, you schedule a skills test with an examiner. You bring a vehicle that meets Class B requirements (usually a straight truck or bus), and the examiner watches you perform pre-trip inspection, basic maneuvers, and on-road driving. This test lasts 30 to 45 minutes. You must also pass a Department of Transportation medical exam with a certified medical examiner — this checks your vision, hearing, blood pressure, and overall fitness to drive.
Once you pass all three parts, your state issues your Class B license. From start to finish, this usually takes four to eight weeks if you study on your own, or two to four weeks if you attend a commercial driving school.
Choosing between a commercial driving school and self-study
You have two paths: attend a commercial driving school or study on your own and test through your DMV. Each has real trade-offs.
Commercial driving schools provide classroom instruction, behind-the-wheel training, and test preparation. Instructors teach you the material, drill you on weak spots, and let you practice in their vehicles before you test. Most schools may provide you will pass the written and skills tests, or they refund part of your tuition. Schools typically take four to eight weeks and cost $3,000 to $7,000. Many employers reimburse tuition after you work for them for a set period, so ask your potential employer before you enroll.
Self-study means you buy or read your state's CDL manual, study on your own schedule, and test at your DMV. You can find practice tests online for free or low cost. You will need to arrange your own vehicle for the skills test, and you pay the DMV testing fees directly. This route costs $100 to $300 total but takes longer — most people need eight to twelve weeks — and the pass rate is lower because you do not have an instructor to catch gaps in your knowledge.
If you have a job offer contingent on getting your Class A quickly, a school is usually worth the cost. If you have time and are confident in self-directed learning, self-study saves money.
The written knowledge test for Class A
The Class A written test covers air brakes, combination vehicles, hazmat, and general commercial driving knowledge. Your state's DMV publishes the official study manual online for free. Read it cover to cover at least once, then focus on the sections that give you trouble.
The test itself is multiple choice, usually 50 to 70 questions, and you need to score at least 80 percent to pass. You take it at your local DMV office on a computer or on paper, depending on your state. It takes 60 to 90 minutes. You can retake it if you fail, but most states charge a fee each time — usually $10 to $25 per attempt.
The hardest sections for most test-takers are air brakes and combination vehicle handling. If you are using a commercial school, instructors will drill these repeatedly. If you are self-studying, spend extra time on the practice tests for these topics. Many free CDL practice test sites let you filter by topic, so you can drill air brakes until you score 90 percent consistently.
The skills test and what examiners look for
After you pass the written test, you schedule a skills test with a state-certified examiner. You bring a Class A vehicle — typically a tractor-trailer or straight truck — that meets Department of Transportation standards. The test has three parts: pre-trip inspection, basic maneuvers, and on-road driving.
Pre-trip inspection takes 10 to 15 minutes. The examiner asks you to walk around the vehicle and point out safety items: lights, tires, brakes, coupling devices, and cargo securement. You do not have to touch anything; you just have to identify what you are checking and explain why it matters. Most failures happen here because drivers skip items or cannot explain what they are looking at.
Basic maneuvers happen in a closed course or parking lot. You perform a straight-line backing, an offset backing, and a 90-degree alley dock. These take 10 to 15 minutes. The examiner is watching for smooth steering, proper mirror use, and control of the vehicle. Hitting cones or curbs results in automatic failure of that maneuver.
On-road driving lasts 20 to 30 minutes. You drive on public streets and highways while the examiner watches. They are checking that you use mirrors constantly, maintain safe speed, signal properly, and handle turns and lane changes smoothly. They will ask you to perform specific maneuvers — merging, passing, backing into a space — to see how you handle them.
If you fail any part, you can retake the whole test. Most states charge $50 to $100 per attempt. Commercial schools let you practice these maneuvers repeatedly before you test, which is why their pass rate is higher.
The Department of Transportation medical exam
You must pass a DOT medical exam before your state issues your Class A license. This is not optional, and you cannot use your regular doctor — you need a certified medical examiner listed on the National Registry of Certified Medical Examiners.
The exam checks your vision (you need at least 20/40 in each eye, corrected), hearing, blood pressure, and overall fitness to drive. The examiner reviews your medical history, checks for conditions that disqualify you (like uncontrolled diabetes or heart disease), and tests your reflexes and coordination. The exam takes 30 to 45 minutes and costs $75 to $150.
If you pass, the examiner issues a Medical Certificate valid for two years. You bring this certificate to your DMV when you explore for your Class A license. If you fail, the examiner will tell you why and whether it is temporary (like high blood pressure that can be treated) or permanent. Some conditions can be waived with additional documentation from your doctor.
Schedule your medical exam early in the process. Some people fail and need time to address the issue before they can test. You can find certified examiners through your state's DMV website or through the National Registry at fmcsa.dot.gov.
explore for your Class A license at the DMV
Once you pass the written test, skills test, and medical exam, you go to your local DMV office to explore for your Class A license. Bring your current driver's license, your Medical Certificate, proof of residency (a utility bill or lease), and your Social Security number. Some states also require proof of citizenship or a passport.
The DMV clerk will verify that you passed all three tests, check your Medical Certificate, and process your process. They will take a new photo and ask you to sign. The fee for upgrading from Class B to Class A is typically $50 to $100, depending on your state. Some states charge extra if you want a hazmat endorsement at the same time.
Your Class A license is usually ready within one to two weeks. Some states mail it to you; others let you pick it up at the office. Check with your DMV about their timeline. If you need it faster, some states offer expedited processing for an extra fee.
Frequently Asked Questions
Can I get a Class A license without a Class B first?
No. Every state requires you to hold a valid Class B commercial driver's license before you can get a Class A. You cannot skip this step. If you do not have a Class B, you must get one first, which involves its own written test, skills test, and medical exam.
How long does it take to get a Class A license?
If you already have a Class B and attend a commercial driving school, four to eight weeks. If you study on your own, eight to twelve weeks. If you do not have a Class B yet, add another four to eight weeks for that process. The medical exam can usually be scheduled within one to two weeks.
What happens if I fail the skills test?
You can retake it. Most states charge $50 to $100 per attempt. You do not have to retake the written test or medical exam — only the skills test. Commercial driving schools often include one or two free retakes in their tuition, so check before you enroll.
Do I need a hazmat endorsement with my Class A?
Not unless you plan to haul hazardous materials. If you do, you take an additional written test and pass a background check. This adds two to four weeks and costs $50 to $100. You can get your Class A first and add hazmat later if your job requires it.
What disqualifies you from getting a Class A license?
Failing the medical exam is the most common reason. Conditions like uncontrolled high blood pressure, diabetes without proper management, or certain heart conditions can disqualify you. Some states also disqualify you if you have too many traffic violations or a DUI on your record within a certain time period. Check your state's DMV website for the full list.