How to Get a Hazmat Endorsement for Your CDL

For commercial drivers looking to advance their careers or take on more specialized loads, earning a Hazmat (H) endorsement is a smart move. It opens up new job opportunities, increases earning potential, and demonstrates your ability to safely transport hazardous materials. But getting that little “H” on your license takes more than just a simple DMV visit.

Let’s walk through everything you need to know—from requirements to testing and tips for success.

What Is a Hazmat Endorsement?

A hazmat endorsement allows commercial drivers to legally transport hazardous materials—anything from flammable liquids and explosives to corrosive chemicals and radioactive substances. Because these materials pose safety and environmental risks, federal and state agencies regulate who can haul them and how.

This endorsement is an add-on to your existing Commercial Driver’s License (CDL) and is required by the U.S. Department of Transportation (DOT) for anyone hauling regulated hazardous cargo.

Step 1: Meet Basic Eligibility Requirements

Before you can apply for a hazmat endorsement, you must already hold a valid CDL. Additionally, you must:

  • Be at least 21 years old

  • Be a U.S. citizen or lawful permanent resident

  • Pass a federal background check through the Transportation Security Administration (TSA)

Some states may have additional residency or identification requirements, so it’s a good idea to check with your local Department of Motor Vehicles (DMV).

Step 2: Complete the TSA Background Check

The TSA background check is a crucial step and typically the most time-consuming part of the process. Here’s what it involves:

  • Submitting an application through the TSA’s Hazmat Endorsement Threat Assessment Program

  • Providing fingerprints and undergoing a criminal history check

  • Paying a fee (usually around $86.50)

Approval can take anywhere from a few days to several weeks, depending on your background and application volume. Once approved, you’ll receive a clearance notification that you can take to your DMV.

Step 3: Prepare for and Pass the Hazmat Knowledge Test

Once you’ve been cleared by the TSA, you’ll need to pass the hazmat written test at your state’s DMV. This test covers:

  • Federal Hazardous Materials Regulations (HMR)

  • Safe loading and unloading procedures

  • Emergency response protocols

  • Shipping papers and documentation

  • Placarding and labeling requirements

  • Security and safety best practices

Studying the Hazardous Materials section of your state’s CDL manual is essential. Many states also offer practice tests online to help you prepare.

Step 4: Apply for the Endorsement at Your DMV

Bring the following with you:

  • CDL and driver’s license

  • TSA clearance proof

  • Any required forms of identification

  • Payment for the endorsement fee (varies by state)

Once you pass the written test, your CDL will be reissued with the hazmat endorsement added.

Step 5: Stay Compliant and Renew As Needed

Hazmat endorsements typically expire every five years, though this may vary by state. Renewal usually requires repeating the TSA background check and sometimes retaking the written test.

It’s also worth noting that hazmat regulations can change, so it’s important to stay informed and consider taking refresher courses.

Final Thoughts

While getting a hazmat endorsement takes effort, it’s a worthwhile investment for any commercial driver seeking to diversify their qualifications and increase earning potential. With proper preparation and a clear understanding of the steps involved, you’ll be well on your way to becoming a certified hazmat driver.