CDL HazMat Endorsement Guide: TSA Check, Cost & Hazard Classes (2026)

HazMat is the highest-paying CDL endorsement, and the only one gated by a federal background check. To carry placarded hazardous materials you have to do two things: pass the HazMat (H) knowledge test, and clear a TSA Security Threat Assessment. This guide covers both, starting with the part the test drills hardest, the nine hazard classes.

The nine hazard classes

Identifying a material's hazard class is the single most-tested HazMat skill. Click each class below to see what it covers, real examples, and the placard that identifies it.

The nine hazard classes

1 of 9 explored

Class 1: Explosives

Common examples: Ammunition, fireworks, blasting agents, airbag inflators
Placard: Orange placard

When you must placard

Knowing the class is only useful if you know when the load has to be placarded. These are the rules the H test comes back to most.

Table 1 materials

Placard for ANY amount

The most dangerous materials (explosives 1.1–1.3, poison gas, certain others) require placards no matter how little you carry.

Table 2 materials

Placard at 1,001 lb or more

For most other hazardous materials, you placard once the total weight of all Table 2 materials reaches 1,001 pounds (454 kg).

Placard placement

All four sides

Placards go on the front, rear, and both sides of the vehicle, readable from each direction.

Subsidiary hazard

Add a placard with no number

When a material has a secondary danger, a subsidiary placard (without a class number) communicates it.

The TSA Threat Assessment, step by step

You cannot simply pass a test for HazMat. Because hazardous materials are a security risk, federal law requires a background check, fingerprints, and a check against FBI and terrorism databases before the endorsement is added to your license.

Pass the HazMat knowledge test

Study the materials, take the HazMat (H) endorsement knowledge test at your state DMV, and bring proof you passed. The endorsement also requires HazMat ELDT theory training from a registered provider before you test.

Apply for the TSA Threat Assessment

Enroll online or by phone and schedule an appointment. You must be a U.S. citizen, lawful permanent resident, or hold another approved immigration status to qualify.

Give fingerprints and documents

At the enrollment center you submit digital fingerprints plus identity and citizenship/immigration documents. Fingerprints are checked against FBI and other federal databases.

Pay the fee and wait for clearance

Pay the threat-assessment fee (about $86.50, non-refundable). TSA reviews your record against the disqualifier list; results typically take a few weeks.

Add the endorsement, renew every 5 years

Once TSA notifies your state you are cleared, the DMV adds the H endorsement to your CDL. It is valid five years; renewal requires a new threat assessment and new fingerprints.

about $86.50

TSA threat-assessment fee

TSA sets the exact fee and updates it periodically; a reduced rate applies in some states via TWIC comparability. Confirm the current amount at tsa.gov.

5 years

Then renew with new fingerprints

The clearance must be renewed every five years, with a fresh threat assessment each time.

What can disqualify you

TSA screens more than 130 offense categories, grouped into three buckets.

Outstanding wants or warrants

An open felony want or warrant disqualifies you until it is resolved.

Temporary (interim) disqualifying crimes

Certain felonies disqualify you for 7 years from conviction, or 5 years after release from incarceration, whichever is later. Examples include serious firearms and drug felonies.

Permanent disqualifying crimes

Terrorism, espionage, sedition, and explosives or weapons-of-mass-destruction offenses cause a lifetime ban. TSA screens over 130 offense categories in all.

Is the HazMat endorsement worth it?

For most drivers, yes. HazMat loads pay a premium because the pool of cleared drivers is smaller and the responsibility is higher, and the endorsement pairs well with tanker work, where the pay premium is largest. The trade-offs are the background check, the renewal every five years, and the extra rules you have to follow on the road, from placarding to route restrictions to where you can park.

HazMat vs. the X (combination) endorsement

If you plan to haul hazardous materials in a tank vehicle, look at the X endorsement. It combines HazMat (H) and Tanker (N) into a single knowledge test instead of two. You still complete the same TSA Threat Assessment. Drivers who want the highest-paying work, hauling liquids and gases in bulk, usually go straight for X.

Before you test: ELDT

Since 2022, the HazMat endorsement requires Entry-Level Driver Training (ELDT) theory from a provider on the FMCSA Training Provider Registry before you can take the knowledge test. It is theory only for HazMat, with no behind-the-wheel portion, but you must complete it first or the DMV will not let you test.

Ready to study? Drill the hazard classes, placarding rules, and loading procedures with a free CDL HazMat practice test for your state.

CDL HazMat Endorsement: TSA Check, Cost & the 9 Hazard Classes

The nine hazard classes

Class 1: Explosives

When you must placard

The TSA Threat Assessment, step by step

What can disqualify you

Is the HazMat endorsement worth it?

HazMat vs. the X (combination) endorsement

Before you test: ELDT

Ready to start practicing?

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