Texas CDL requirements start with a regular driver license and a written knowledge test

To get a Commercial Driver License (CDL) in Texas, you must first hold a valid regular driver license. You then pass a written knowledge test specific to the type of vehicle you'll drive, pass a skills test that includes a pre-trip inspection, a backing exercise, and an on-road driving test, and meet medical certification requirements. Texas does not require you to attend a formal training school, though many people do before testing.

The process takes several weeks from start to finish because you cannot take the skills test on the same day as your knowledge test. You'll need to visit a Texas Department of Public Safety (DPS) office twice — once for the written exam and again, at least one day later, for the driving portion.

Key Takeaways

  • You must hold a valid Texas driver license before you can test for a CDL, and you cannot take the knowledge and skills tests on the same day.
  • A medical examiner must certify you meet federal health standards, and you'll need that certificate before you can get your CDL card.
  • The knowledge test covers vehicle control, safe driving practices, and rules specific to the type of truck or bus you plan to drive.
  • The skills test includes a pre-trip inspection where you point out and explain safety features, a backing exercise in a marked course, and a 10-minute on-road drive with a DPS examiner.
  • Texas allows you to test for multiple endorsements (like hazmat or tanker) at the same time, but each adds a separate written test.

What vehicle classes require a CDL in Texas

You need a CDL if you drive a vehicle with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or any vehicle designed to carry 16 or more passengers including the driver. A GVWR is the maximum weight the manufacturer says the vehicle can safely carry when fully loaded.

Class A covers combination vehicles (tractor-trailers) with a GVWR over 26,000 pounds. Class B covers single vehicles with a GVWR over 26,000 pounds, like straight trucks or large buses. Class C covers vehicles under 26,001 pounds that carry 16 or more passengers, like small buses. Most people testing for a CDL in Texas are pursuing Class A or Class B.

Medical certification and the FMCSA physical exam

Before you can receive your CDL card, you must pass a medical examination performed by a Federal Motor Carrier Safety Administration (FMCSA) certified medical examiner. This is not your regular doctor — it must be someone on the FMCSA's National Registry of Certified Medical Examiners. You can find certified examiners through the FMCSA website or by calling a local DPS office.

The exam checks your vision, hearing, blood pressure, and ability to operate a commercial vehicle safely. You'll receive a Medical Examiner's Certificate (also called a "medical card") valid for two years. You must carry this certificate with you when you drive commercially, and you must show it to the DPS when you explore for your CDL. If your medical certificate expires, your CDL becomes invalid until you renew it.

The knowledge test: what to study and how many questions

The written knowledge test for a CDL in Texas covers general commercial driving knowledge, vehicle inspection, safe driving practices, and hazard perception. The number of questions depends on which class and endorsements you're testing for. A Class A or B general knowledge test is 50 questions, and you must answer at least 40 correctly to pass.

If you test for endorsements — such as Hazmat (hazardous materials), Tanker, Doubles/Triples, or Passenger — each endorsement adds a separate 20-question test. You must pass each test independently. The DPS provides a free CDL manual that covers all tested material, and many people study it for one to two weeks before testing.

You can take the knowledge test at any Texas DPS office. After you pass, you'll receive a permit that allows you to practice driving a commercial vehicle with a licensed CDL holder in the passenger seat. This permit is valid for 180 days.

The skills test: pre-trip inspection, backing, and road drive

The skills test has three parts, all conducted by a DPS examiner on the same day. You cannot take the skills test until at least one day after you pass the knowledge test.

The pre-trip inspection takes about 15 minutes. You walk around the vehicle and point out safety features — lights, brakes, tires, mirrors, coupling devices (if applicable) — and explain what you're checking and why. The examiner is testing whether you know what to look for before driving, not whether you can fix anything. You must identify defects that would make the vehicle unsafe.

The backing exercise takes place in a marked course with cones or lines. You'll perform three maneuvers: straight backing, offset backing (backing into a space offset to one side), and alley docking (backing into a narrow space between two lines). You have a limited number of attempts for each, and hitting a cone or going outside the lines results in failure.

The on-road drive lasts about 10 minutes. The examiner sits in the passenger seat while you drive on public roads. You'll demonstrate smooth acceleration and braking, proper lane changes, mirror checking, and safe turns. The examiner is watching for control of the vehicle, awareness of traffic and hazards, and compliance with traffic laws.

Endorsements and when you need them

An endorsement is an additional qualification on your CDL that allows you to drive certain types of vehicles or cargo. You can test for endorsements at the same time as your main CDL, or you can add them later.

Hazmat (H) allows you to transport hazardous materials. It requires a separate written test and a federal background check. Tanker (N) allows you to drive vehicles carrying liquids in bulk tanks and requires a separate written test. Doubles/Triples (T) allows you to pull double or triple trailers and requires a separate written test. Passenger (P) allows you to transport 16 or more passengers and requires a separate written test. School Bus (S) allows you to drive a school bus and requires a separate written test plus fingerprinting and a background check.

You do not need endorsements to drive a basic commercial truck or bus. Many drivers test for them only when they have a job that requires them.

How long the CDL process takes and renewal requirements

From your first visit to a DPS office to receiving your CDL card typically takes four to eight weeks. The knowledge test can be scheduled within days, but the skills test often has a wait list depending on your local DPS office. After you pass both tests and submit your medical certificate, the DPS processes your process and mails your card.

A CDL in Texas is valid for five years from the date of issue. You renew it by visiting a DPS office, passing a new medical exam, and paying the renewal fee. You do not have to retake the knowledge or skills tests unless your CDL was suspended or revoked, or unless you want to add a new endorsement.

If your medical certificate expires before your CDL does, your CDL becomes invalid. You must renew your medical certificate with an FMCSA examiner and bring the new certificate to the DPS to restore your CDL.

Frequently Asked Questions

Can I test for a CDL without attending a truck driving school?

Yes. Texas does not require formal training. You can study the DPS manual on your own, practice with a CDL holder, and test directly at a DPS office. Many people do this successfully, though some prefer school for structured practice and feedback on their backing and driving skills.

What happens if I fail the skills test?

You can retake it. There is no waiting period between attempts, but you'll need to schedule another test appointment, which may take weeks depending on your local DPS office's schedule. You do not have to retake the knowledge test unless it has expired.

Do I need a CDL to drive a pickup truck for work?

Not unless the truck's GVWR is over 26,001 pounds. Many work trucks fall below that threshold. Check your vehicle's registration or door jamb for the GVWR. If you're unsure, contact the DPS or the vehicle manufacturer.

Can I add an endorsement after I already have my CDL?

Yes. You can visit a DPS office and test for additional endorsements without retaking the general knowledge or skills tests. You'll take only the written test for the new endorsement and pay an additional fee.

What disqualifies you from getting a CDL in Texas?

Failing the medical exam, certain criminal convictions, or a suspended or revoked driver license will disqualify you. The FMCSA medical standards are strict about vision, hearing, and conditions like uncontrolled diabetes or heart disease. A DPS office or medical examiner can tell you whether a specific condition will affect your may be able to access.