What tanker and hazmat endorsements do

A tanker endorsement and a hazmat endorsement are two separate additions to your Class C driver's license that allow you to haul specific cargo. The tanker endorsement (also called the T endorsement) lets you drive vehicles carrying liquids or gases in bulk — think fuel trucks, milk tankers, or propane delivery vehicles. The hazmat endorsement (the H endorsement) permits you to transport materials classified as hazardous by the Department of Transportation, including explosives, flammable liquids, poisons, and radioactive materials.

You do not need one endorsement to get the other. Some drivers get both because their job requires hauling hazardous liquids in bulk tanks. Others get only the tanker endorsement if they haul non-hazardous bulk cargo, or only the hazmat endorsement if they transport hazardous materials in smaller quantities or different container types. Each endorsement requires its own written test and its own fee, which varies by state.

Key Takeaways

  • Tanker and hazmat endorsements are separate tests and fees, though you can take both if your job requires it.
  • You must pass a written knowledge test for each endorsement at your state's DMV or licensing office.
  • Hazmat endorsement applicants must pass a federal background check and fingerprinting, which takes one to two weeks.
  • Study materials for both tests are available free from your state's DMV website, usually in the commercial driver's license section.
  • You keep your Class C license and add the endorsements to it; you do not get a separate document.

Steps to get the tanker endorsement

Start by getting the study material from your state's DMV website. Search for "Class C tanker endorsement study guide" or look under the commercial driver's license resources section. The guide covers how tanker vehicles handle differently (they shift weight as liquid moves), how to inspect tanks, how to load and unload safely, and what to do if you lose brakes or skid on a curve with a full tank.

Schedule your written test at your local DMV office or licensing center. You will answer between 20 and 30 multiple-choice questions depending on your state. Most states require a score of 80 percent or higher to pass. Bring your current Class C license and any ID your state requires. Pay the endorsement fee when you register for the test — this ranges from $10 to $50 depending on your state.

Once you pass, the endorsement is added to your existing Class C license. You do not receive a new physical card when ready in all states; some print it on the spot, while others mail it within one to two weeks. Check with your DMV about their process when you pass the test.

Steps to get the hazmat endorsement

Hazmat endorsement applicants must clear a federal background check before they can take the written test. This is a Transportation Security Administration (TSA) requirement, not a state one. Start by visiting the TSA's hazmat endorsement page or asking your state DMV for the process form and instructions. You will need to provide your full legal name, date of birth, Social Security number, and citizenship status.

After you submit the process, you will be scheduled for fingerprinting at an approved location — often a local police station, sheriff's office, or a private fingerprinting service. Bring a valid photo ID and be prepared to pay a fingerprinting fee, typically $15 to $50. The TSA then runs your fingerprints against federal databases. This process takes one to two weeks, though it can take longer if there are delays or if the TSA needs more information.

Once the TSA approves you, you can schedule your written test at your state's DMV. The test covers hazardous materials classifications, how to recognize hazmat labels and placards, what to do in an emergency, and regulations for transporting different types of hazardous cargo. Study materials are free on your state's DMV website. You will answer 30 to 50 questions and typically need an 80 percent score to pass. Pay the endorsement fee at test time — usually $10 to $50 depending on your state.

After you pass the written test, the hazmat endorsement is added to your Class C license, just like the tanker endorsement. Your new license arrives by mail or is printed on the spot depending on your state's process.

Background check requirements for hazmat

The TSA background check for hazmat is more thorough than a standard criminal records check. The TSA looks at your criminal history, immigration status, mental health records, and driving history. You will be disqualified if you have certain felony convictions (including crimes of violence, drug trafficking, or crimes involving explosives), if you are not a U.S. citizen or permanent resident, or if you have been committed to a mental institution or found not guilty by reason of insanity within the past five years.

You will also be disqualified if you have an outstanding warrant, if you are subject to a restraining order, or if you have been convicted of certain traffic violations within the past three years. The TSA publishes the full list of disqualifying factors on their website. If you are unsure whether your history will disqualify you, contact your state's DMV before you pay the process fee.

Timeline and costs

Getting a tanker endorsement typically takes one to two weeks from the time you schedule your test. You study the guide on your own time, then book the test and take it. If you pass, the endorsement is added the same day or within two weeks by mail. Total cost is usually $10 to $50 for the test fee, plus any cost to print or mail the new license (often free).

Getting a hazmat endorsement takes longer because of the background check. Plan for four to six weeks total: one to two weeks for the TSA to process your background check process and fingerprinting, then one to two weeks to schedule and take the written test, then one to two weeks for your new license to arrive. Total cost is usually $25 to $100 when you add the fingerprinting fee, the TSA process fee (if any), and the test fee.

If you are getting both endorsements, you can take the tanker test first while your hazmat background check is processing. This way you do not have to wait for the hazmat approval before you start studying and testing for tanker.

Study materials and test preparation

Your state's DMV website has free study guides for both endorsements. These guides are written by the state and cover exactly what will be on the test. Read through the guide once to get familiar with the topics, then go back and study the sections that feel less clear. Many people find it helpful to read the guide, then take a practice test, then review the sections where they missed questions.

Some states offer free online practice tests on their DMV website. Others have practice test books available for purchase at bookstores or online. The practice tests are not required, but they help you know whether you are ready to take the real test. If you score below 80 percent on a practice test, spend more time on the study guide before you schedule your official test.

The written tests are closed-book — you cannot bring notes or study materials into the testing room. You will have a set amount of time to answer all questions, usually 30 to 60 minutes depending on the endorsement and your state. If you do not pass on your first try, you can retake the test. Most states let you retake it the same day or within a few days, though you will pay the test fee again.

What happens after you get the endorsements

Once the endorsements are on your Class C license, you are legal to haul tanker cargo, hazmat cargo, or both, depending on which endorsements you have. Your employer will likely ask to see your license before your first day of work to confirm the endorsements are there. Keep your license with you while you drive — law enforcement can ask to see it at any time.

Endorsements do not expire on a set schedule the way some licenses do, but they are tied to your Class C license. If your Class C license expires and you renew it, your endorsements renew with it. If you move to a different state, you will need to get new endorsements in that state — they do not transfer. Some states have reciprocity agreements that waive the written test if you already hold the endorsement in another state, but you will still need to explore and pay the fee.

Frequently Asked Questions

Can I take both tests on the same day?

You can take the tanker test whenever you are ready, but you cannot take the hazmat test until the TSA approves your background check. If you want to take both on the same day, you will need to wait for the hazmat approval first. Many people take the tanker test while waiting for the hazmat background check to clear, then take the hazmat test a few weeks later.

What if I fail the written test?

You can retake the test. Most states allow you to retake it the same day or within a few days, though you pay the test fee again. Review the study guide, focus on the sections where you missed questions, and try again. Most people pass on the second attempt.

Do I need a commercial driver's license to get these endorsements?

No. Tanker and hazmat endorsements are added to a Class C (regular passenger vehicle) license. If you already have a commercial driver's license (Class A or B), the endorsements can be added to that instead. Check with your employer about which license type they require.

Will a DUI or traffic ticket disqualify me from hazmat?

A DUI or reckless driving conviction within the past three years will disqualify you from hazmat. Other traffic tickets usually do not, but the TSA reviews your entire driving record. If you are unsure, contact your state's DMV or the TSA before you explore.

How long do the endorsements stay valid?

Endorsements stay valid as long as your Class C license is valid. When you renew your Class C license, the endorsements renew with it. If your license expires and you do not renew it, the endorsements expire too.