Adding a hazmat endorsement to a Mississippi commercial driver’s license takes three things: a TSA security threat assessment, an FMCSA-registered hazardous materials theory course, and a written knowledge test at a Mississippi Department of Public Safety driver’s license station. Budget about $185 in fees and give yourself several weeks, because the TSA background check alone can run past 45 days.
Who Can Qualify
You need a valid Mississippi CDL before you can add the “H” endorsement. Interstate hazmat work requires you to be at least 21. Mississippi issues CDLs at 18, but those licenses are intrastate-only, and the federal hazmat rules layer on requirements that in practice push most hazmat drivers to interstate-eligible status.1Justia. Mississippi Code 63-1-211 – Commercial Drivers License
Federal law also limits the endorsement by immigration status. U.S. citizens and lawful permanent residents qualify, and so do refugees, people granted asylum, and certain nonimmigrant visa holders with work authorization. Anyone in removal proceedings or under an order of removal is ineligible.2eCFR. 49 CFR 1572.105 – Immigration Status
Your medical certification has to stay current. If your Medical Examiner’s Certificate lapses, DPS automatically downgrades your commercial driving privileges, and the hazmat endorsement becomes unusable even while it still shows on the license. File each new certificate with DPS before the old one expires.3Federal Motor Carrier Safety Administration. Medical
Start With the TSA Background Check
Every applicant has to clear a federal security threat assessment run by the Transportation Security Administration under 49 CFR Part 1572.4eCFR. 49 CFR Part 1572 – Credentialing and Security Threat Assessments This is the longest single step in the process, which is why it’s the one to start first.
Mississippi uses the TSA Universal Enrollment Services program. Fingerprinting and enrollment happen at designated enrollment centers, not at DPS CDL stations.5DPS Driver Service Bureau. CDL Hazmat Enrollment Program You can pre-enroll and book a fingerprint appointment through universalenroll.dhs.gov, which lists more than 340 centers nationwide. Bring a valid U.S. passport, or a driver’s license paired with a birth certificate. TSA will notify you of the result directly.
The fee is $85.25 for new and renewing applicants as of January 1, 2025. If you already hold a valid Transportation Worker Identification Credential, the fee drops to $41.00 because TSA can reuse that background check.6Transportation Security Administration. HAZMAT Endorsement
Processing can exceed 45 days under heavy demand, and TSA recommends enrolling at least 60 days before you need an eligibility determination.6Transportation Security Administration. HAZMAT Endorsement
Convictions That Can Disqualify You
The background check is substantive, not a formality. One set of felony convictions permanently disqualifies you: espionage, sedition, or treason; federal terrorism offenses; crimes involving a transportation security incident; improper transportation of hazardous material; explosives offenses; murder; bomb threats; and RICO violations where the predicate is one of these.7Transportation Security Administration. Disqualifying Offenses and Other Factors
A second set is disqualifying if you were convicted within seven years of your application, or released from incarceration within five years of your application: firearms offenses, controlled substance distribution offenses, arson, robbery, kidnapping, rape or aggravated sexual abuse, assault with intent to kill, voluntary manslaughter, extortion, bribery, smuggling, immigration violations, and related fraud offenses.7Transportation Security Administration. Disqualifying Offenses and Other Factors Outstanding warrants or indictments in either category also block the endorsement until they’re resolved. TSA can additionally deny based on certain mental capacity determinations by a court or government authority.
If TSA issues an Initial Determination of Threat Assessment, you have 60 days from receipt to appeal, request the materials TSA relied on, or request an extension. Miss that window and the initial determination becomes final, at which point TSA tells Mississippi to deny or revoke the endorsement.8eCFR. 49 CFR 1515.5 – Appeal of Initial Determination of Threat Assessment Based on Criminal Conviction, Immigration Status, or Mental Capacity
Complete the Required Training
Since February 7, 2022, first-time hazmat applicants must finish a hazardous materials theory course through an FMCSA-registered training provider before they’re allowed to take the knowledge test. Drivers who already held an H endorsement before that date are not subject to the requirement.9Federal Motor Carrier Safety Administration. Entry-Level Driver Training (ELDT)
Find an approved provider through the FMCSA Training Provider Registry at tpr.fmcsa.dot.gov, filtering by “Hazardous Materials” under “Theory” training. If your provider isn’t on the registry, the training doesn’t count and DPS won’t seat you for the test. The provider reports your completion to FMCSA directly, and that’s how DPS confirms you’re eligible to test.
Pass the Knowledge Test
The hazmat knowledge test is a written, multiple-choice exam given at DPS driver’s license stations, and federal regulation requires it for the endorsement.10eCFR. 49 CFR 383.93 – Endorsement Testing Requirements Mississippi’s version has 30 questions and you need 24 correct for a passing score of 80%.
The material covers 49 CFR Parts 171 through 180: identifying hazardous materials from shipping papers and placards, loading and unloading rules, emergency response basics, and the compatibility rules for hauling different hazard classes together. The hazardous materials section of the Mississippi CDL Manual is the best study resource because it tracks the test directly. Practice tests are useful, but they’re not a substitute for the manual.
You can retest if you don’t pass on the first try. Mississippi doesn’t publicize a fixed waiting period, so ask your local CDL station how soon they’ll re-book you.
Finish at DPS and Add Up the Costs
Once TSA has cleared you, your ELDT training is on file, and you’ve passed the knowledge test, go to a Mississippi DPS driver’s license station to have the endorsement added. Bring your current Mississippi CDL, your knowledge test result, and confirmation of your TSA clearance.
Mississippi charges $100 for the hazardous materials endorsement.11DPS Driver Service Bureau. Driver Service Fees With the $85.25 TSA fee, your out-of-pocket total is about $185.25 before any ELDT tuition, which varies by provider. If you qualify for the reduced TSA rate with a valid TWIC, the total falls closer to $141. Your new CDL, printed with the “H” endorsement, follows after DPS processes the application.
Renewing the Endorsement
The hazmat endorsement generally has to be renewed every five years, aligned to your CDL cycle.6Transportation Security Administration. HAZMAT Endorsement Renewal means a fresh TSA threat assessment at the same $85.25 fee (or $41.00 with a valid TWIC), and DPS may require you to retake the knowledge test depending on the circumstances.
DPS recommends starting renewal at least 60 days before your CDL expires.5DPS Driver Service Bureau. CDL Hazmat Enrollment Program With TSA processing running over 45 days at times, a late start is what causes a gap, and during that gap you can’t legally haul placarded loads.
Moving to Mississippi With an Existing Endorsement
Holding an H endorsement in another state doesn’t shortcut the Mississippi process. You’ll apply for a Mississippi CDL, submit new fingerprints, and go through a new TSA threat assessment regardless of how recently you cleared one elsewhere. TSA charges the same $85.25 fee for the transfer. You’ll also take the Mississippi knowledge test and pay the $100 state fee.11DPS Driver Service Bureau. Driver Service Fees
Federal law requires you to surrender the out-of-state CDL when you get the Mississippi one. Start the TSA enrollment as soon as you know you’re moving so the background check is running while you handle the rest of the paperwork, and try not to let the old state’s endorsement lapse mid-transfer.