The Hazardous Materials (H) endorsement is the highest-stakes endorsement available on a U.S. Commercial Driver's License. It opens up significantly higher-paying loads, but the application process is meaningfully more involved than for any other endorsement.
Step 1: Pass the Hazmat written exam
The Hazmat knowledge test runs thirty multiple-choice questions covering placarding, loading and segregation, emergency response, security awareness, and the federal hazardous materials regulations under 49 CFR Parts 100 through 185. You need eighty percent (twenty-four correct) to pass. Schedule the written test at any state DMV office that handles CDL endorsements; some jurisdictions accept walk-ins.
Step 2: Schedule the TSA Threat Assessment
Unlike any other CDL endorsement, the Hazmat endorsement requires a federal Transportation Security Administration background check. Schedule the appointment online at the TSA UES (Universal Enrollment Services) portal. The fee is approximately eighty-seven dollars for an initial application, paid at scheduling. You will be asked to provide your fingerprints and biographical information; the appointment itself takes about thirty minutes.
Step 3: Wait for clearance
TSA processing typically takes four to six weeks. The agency runs your fingerprints against criminal, immigration, and intelligence databases. Most applications are approved without incident; a small percentage receive an "Initial Determination of Threat Assessment" letter that triggers an appeals process. Plan accordingly — do not assume you will have your endorsement in hand within thirty days of starting the process.
Step 4: Receive the endorsement
Once TSA clearance is issued, your state DMV is automatically notified, and you can return to the counter to receive your updated CDL with the H endorsement printed on the back. Some states issue a temporary paper endorsement immediately; others mail the new physical card.
Renewals
The Hazmat endorsement must be renewed on a five-year cycle, and each renewal requires a fresh TSA threat assessment. The renewal fee is lower than the initial assessment, and processing is usually faster — but plan ahead, because lapsing the endorsement means losing access to hazmat loads until the new clearance is issued.
For drivers preparing for How to Get a Hazmat (H) Endorsement: 2026 Step-by-Step, additional context — including federal manual excerpts, employer hiring practices, and DOT medical guidance — is widely available from industry resources. Continue reading on a recommended industry resource for further detail. Always cross-check anything you read with the current edition of your state CDL manual, since enforcement guidance is updated periodically.