What you need to know before you start
A Commercial Driver's License (CDL) in Arizona is issued by the Arizona Department of Transportation (ADOT) and allows you to operate commercial vehicles for pay — typically trucks weighing more than 26,001 pounds, buses carrying 16 or more passengers, or vehicles carrying hazardous materials. You cannot straightforward upgrade an existing driver's license; you must pass a separate written test, a skills test, and a medical examination specific to commercial driving.
Arizona recognizes three classes of CDL: Class A (tractor-trailers and doubles), Class B (straight trucks and buses), and Class C (vehicles carrying hazardous materials). Most people pursuing commercial driving start with Class A or B. The entire process — from medical exam to skills test — typically takes four to eight weeks, depending on how quickly you schedule appointments and pass the written exam on your first attempt.
Key Takeaways
- You must hold a valid Arizona driver's license, pass a Department of Transportation medical exam, and be at least 18 years old (21 to cross state lines).
- The written test covers vehicle operation, safety, and cargo handling; you study the CDL manual and take the exam at an ADOT office.
- The skills test includes a pre-trip inspection, a backing exercise, and an on-road driving evaluation with an ADOT examiner in your own vehicle.
- You pay a fee to ADOT for the license itself, plus separate fees for the medical exam and any third-party testing services you use.
- Arizona allows you to take the skills test with a third-party examiner (not ADOT staff) if you use an approved testing facility.
Step 1: Get a medical examination and certification
Before you can take any CDL test, you must pass a medical examination performed by a FMCSA-certified medical examiner (Federal Motor Carrier Safety Administration). This is not your regular doctor; it must be someone on the FMCSA National Registry. The examiner checks your vision, hearing, blood pressure, and general health to confirm you can safely operate a commercial vehicle.
You can find certified examiners through the FMCSA website or by calling ADOT. The exam costs between $75 and $150, depending on the examiner. Once you pass, the examiner issues a Medical Certificate valid for two years. You bring this certificate with you when you explore for your CDL at ADOT.
Step 2: Study and pass the written knowledge test
ADOT publishes the official Arizona CDL Manual, available free on the ADOT website. The manual covers vehicle operation, braking systems, cargo handling, hazardous materials (if pursuing that endorsement), and safety regulations. You study this material on your own — there is no mandatory classroom requirement in Arizona, though many people attend CDL training schools for structured instruction.
When you are ready, you schedule an appointment at an ADOT office to take the written test. The test is multiple-choice and covers the topics in the manual. You must score at least 80 percent to pass. If you fail, you can retake the test, but you must wait one day between attempts. Once you pass, ADOT issues you a Commercial Learner's Permit (CLP), which allows you to practice driving a commercial vehicle with a licensed CDL holder in the passenger seat.
Step 3: Practice with your Commercial Learner's Permit
With your CLP in hand, you can legally operate a commercial vehicle for practice — but only with a licensed CDL holder present. Many people use this period to attend a CDL training school, which provides both classroom instruction and behind-the-wheel practice. Others practice with an employer or a private instructor. Arizona does not mandate a minimum practice period, but most examiners expect you to demonstrate competence during the skills test, so adequate practice is essential.
Your CLP is valid for 180 days. If you do not pass the skills test within that window, you must renew your CLP and retake the written exam. Keep your CLP with you whenever you drive a commercial vehicle during this practice phase.
Step 4: Schedule and pass the skills test
The skills test has three parts: a pre-trip inspection (you walk around the vehicle and point out safety features and potential problems), a backing exercise (you maneuver the vehicle into a tight space), and an on-road driving evaluation (you drive on public roads with an examiner). You must pass all three parts to receive your CDL.
In Arizona, you can take the skills test with either an ADOT examiner or a third-party examiner at an approved testing facility. Third-party testing is often faster to schedule. You must provide your own vehicle for the test — it must be the same class and type as the CDL you are pursuing. For example, if you are testing for Class A, you need a tractor-trailer. The examiner will inspect the vehicle before the test begins.
If you fail any part of the skills test, you must wait one day before retaking it. You can retake only the failed portion, not the entire test.
Step 5: explore for your CDL at ADOT
Once you pass the skills test, you return to an ADOT office with your passing score, your CLP, your medical certificate, and a valid form of identification. You complete the CDL process and pay the licensing fee. Arizona charges a flat fee for a CDL; the exact amount depends on the class and endorsements you are pursuing. As of the last update, a standard CDL costs around $75 to $100, but fees can change, so confirm the current amount with ADOT before you go.
ADOT processes your process and issues your physical CDL card, usually within one to two weeks. Your CDL is valid for five years in Arizona, after which you must renew it.
Costs and timeline at a glance
| Step | Typical Cost | Timeline |
|---|---|---|
| Medical exam | $75–$150 | 1–2 weeks to schedule |
| Written test (included in CDL fee) | Included | 1–2 weeks to schedule |
| Practice period | $0–$5,000+ (if using a school) | 2–8 weeks (varies widely) |
| Skills test | $0 (ADOT) or $100–$300 (third-party) | 1–4 weeks to schedule |
| CDL issuance | $75–$100 | 1–2 weeks processing |
The total out-of-pocket cost for testing and licensing is typically $250 to $500 if you use ADOT examiners and study on your own. If you attend a CDL training school, costs rise to $3,000 to $7,000 depending on the school and program length. The entire process from medical exam to CDL in hand usually takes four to eight weeks if you pass all tests on the first attempt.
Frequently Asked Questions
Can I get a CDL if I have a suspended or revoked driver's license?
No. You must have a valid, unrestricted Arizona driver's license before ADOT will issue a CDL. If your license is suspended or revoked, you must resolve that issue first. Once your license is restored, you can begin the CDL process.
Do I need to attend a CDL training school?
Arizona does not require formal training, but many employers prefer or require it. Training schools provide structured instruction, behind-the-wheel practice, and often help you schedule tests. If you are self-studying, you must be disciplined about learning the manual and practicing with your CLP before the skills test.
What happens if I fail the skills test?
You can retake the failed portion after waiting one day. Your CLP remains valid for the full 180-day period, so you have time to practice and try again. If your CLP expires before you pass, you must renew it and retake the written exam.
Can I add endorsements to my CDL after I get it?
Yes. You can add endorsements (such as hazardous materials or passenger) by passing the relevant written test and, in some cases, a skills test. You do not need to retake the entire CDL process — you straightforward add the endorsement to your existing license at an ADOT office.
Is my Arizona CDL valid in other states?
Yes. A CDL issued by Arizona is recognized in all 50 states and Canada. However, if you move to another state and establish residency there, you will eventually need to transfer your CDL to that state's licensing authority.