The basic class a cdl requirements are a regular driver license, age 18 (21 to cross state lines or haul hazmat), a DOT medical certificate, passing knowledge tests including combination vehicles, entry-level driver training and a three-part skills test in a tractor-trailer or other combination vehicle. A Class A CDL is the license for combinations where the towed vehicle is rated over 10,000 pounds and the whole rig is rated 26,001 pounds or more (49 CFR 383.91, at ecfr.gov).
Quick answer
You get a class a cdl license in two stages. First you pass the knowledge tests and receive a commercial learner's permit (CLP). Then you train, hold the permit at least 14 days and pass the skills test. Most career changers spend a few weeks to a few months on the whole process, mostly depending on the training school and test appointment waits.
Class A CDL requirements, step by step
This is how do i get a cdl class a license, in the order the Federal Motor Carrier Safety Administration (FMCSA) rules set for every state.
- Meet the basicsHold a valid regular driver license from the state where you apply and be at least 18. Under federal rules you must be 21 to drive across state lines or haul placarded hazmat.
- Get a DOT medical examMost drivers need a medical examiner's certificate from an examiner on the FMCSA National Registry. You also self-certify the type of driving you will do.
- Pass the knowledge tests and get your CLPGeneral knowledge, combination vehicles and air brakes for most Class A trucks. You need at least 80 percent on each (49 CFR 383.135).
- Complete class a cdl trainingSince February 7, 2022, first-time Class A applicants and drivers upgrading from Class B to A must complete entry-level driver training (ELDT) with a provider on the FMCSA Training Provider Registry.
- Wait at least 14 daysFederal rules do not allow the skills test in the first 14 days after the CLP is issued. Some states set more, such as Pennsylvania's 15 days.
- Pass the skills testPre-trip inspection, basic control skills and a road test, in a combination vehicle representative of Class A.
Which knowledge tests you need
- General knowledge: everyone takes it first.
- Combination vehicles: required for Class A. It covers coupling, uncoupling, trailer air lines and rollover risk.
- Air brakes: required to drive with air brakes, which nearly every tractor-trailer has. Without it your CDL carries an air brake restriction.
- Doubles and triples (T): for pulling more than one trailer.
- Tank (N): for liquid or gas tank loads.
- Hazmat (H): a knowledge test plus a TSA security threat assessment. ELDT for hazmat must be finished before the hazmat knowledge test.
- Passenger (P) and school bus (S): only if you will drive buses.
Some states add their own test. Texas, for example, lists a Texas Commercial Rules test before general knowledge on its Department of Public Safety site, dps.texas.gov.
Class A CDL vs Class B
| Class A | Class B | |
|---|---|---|
| What it covers | Combinations with a towed vehicle over 10,000 lbs and a combined rating of 26,001 lbs or more | Single vehicles rated 26,001 lbs or more, towing 10,000 lbs or less |
| Typical jobs | Tractor-trailer, flatbed, tanker | Dump truck, box truck, city bus, cement mixer |
| Extra knowledge test | Combination vehicles | None beyond general knowledge and air brakes |
| Can drive the other class? | Yes, Class B and C with the right endorsements | No heavy trailers |
Costs and timeline
Every state sets its own fees. Two examples from official 2026 fee pages: Texas DPS lists $25 for a CLP (valid 180 days) and $97 for a new CDL that expires in eight years. The California DMV (dmv.ca.gov) lists $100 for an original Class A or B application, valid for 12 months, and $46 for each skills retest. Training costs are set by schools and vary widely, and the medical exam fee is set by the examiner.
- Week 1 to 2: medical exam, study, knowledge tests, CLP.
- Days 1 to 14 on the CLP: training starts. No skills test is allowed yet.
- After ELDT is finished and logged: book the skills test. Appointment waits vary by state and season.
- California example: the CLP lasts 180 days and the application 12 months, so missing those windows can mean starting over.
How to study for the Class A knowledge tests
Use your state's free CDL manual and work in this order: general knowledge, air brakes, then combination vehicles. In our experience training drivers at US Driving School, air brakes is the section people find hardest, and combination vehicles builds directly on it because it is mostly about trailer air lines and brakes.
- Read one manual section, then take a class a cdl practice test on that section.
- Write down every miss and the reason, not just the right letter.
- For air brakes, learn the parts in the order the air travels and memorize the key pressure numbers.
- For combination vehicles, walk through coupling and uncoupling step by step, out loud.
- Take mixed tests until you score well above 80 percent every time.
The combination test loves the tractor protection valve, the glad hands and the trailer air supply control. If you can explain those three, you are close.
FAQ
How do I get a CDL Class A license?
Get a DOT medical certificate, pass general knowledge, combination vehicles and usually air brakes to get a CLP, complete ELDT, hold the CLP at least 14 days, then pass the skills test in a Class A vehicle.
What are the Class A CDL requirements by age?
18 to drive within your state and 21 to drive across state lines or haul hazmat.
Do I need a CDL school for Class A?
You need entry-level driver training from a provider on the FMCSA Training Provider Registry. That can be a school, a carrier's training program or another registered provider.
Can I upgrade from Class B to Class A later?
Yes, but the upgrade requires ELDT, a new CLP for Class A, the combination knowledge test and a Class A skills test.
How long is a CLP valid?
Federal rules allow up to one year in total. Many states use 180 days, including Texas and California.
Rules change, so confirm every step with your state licensing agency and FMCSA (fmcsa.dot.gov) before you pay for training. DMVZone is a study resource, not a government agency.
