What an endorsement is and why you need one
An endorsement is a notation on your driver's license that permits you to operate a specific type of vehicle or perform a specific driving task. Without the correct endorsement, you cannot legally drive that vehicle, even if you hold a valid commercial driver's license. Endorsements are separate from the license class itself — they are add-ons that expand what you are authorized to do.
The most common endorsements are for hazardous materials (HAZMAT), passenger transport, and tank vehicles. Some states use different letter codes for each endorsement; others use different names. The key point is that your state's DMV will not issue you a CDL for certain vehicle types or cargo unless you first pass the endorsement test for that category.
If you drive a vehicle that requires an endorsement you do not hold, you can be cited, fined, and in some cases have your license suspended. Your employer may also face penalties. This is why confirming which endorsements you need before you start a job is critical.
Key Takeaways
- Endorsements are added to your CDL to permit you to drive specific vehicle types or carry specific cargo, and you cannot legally operate those vehicles without them.
- The most common endorsements are H (HAZMAT), P (passenger), and T (tank), though your state may use different codes or names.
- Each endorsement requires you to pass a written test at your DMV; some also require a skills test or background check.
- HAZMAT endorsements require a federal background check and a Transportation Security Administration (TSA) clearance, which can take several weeks.
- You must renew endorsements when you renew your CDL, and some endorsements expire sooner than others.
Common endorsements and what they allow you to drive
The H endorsement (HAZMAT) permits you to transport hazardous materials — explosives, flammable liquids, gases, poisons, radioactive materials, and other regulated substances. This is one of the most sought-after endorsements because many trucking jobs require it. To obtain an H endorsement, you must pass a written test covering hazmat regulations, and you must pass a federal background check and TSA security clearance. The background check can take four to six weeks, and you cannot legally haul hazmat until it is complete.
The P endorsement (passenger) permits you to transport 16 or more passengers (including the driver). School bus drivers, charter bus operators, and shuttle drivers need this endorsement. You must pass a written test and, in most states, a skills test that includes a pre-trip inspection and a road test. Some states also require a medical certificate.
The T endorsement (tank) permits you to drive a tank vehicle — a truck with a permanently mounted tank of 119 gallons or more. Tank vehicles carry liquids or gases and require special handling. You must pass a written test covering tank vehicle operations, weight distribution, and emergency procedures.
Other endorsements vary by state but may include N (double/triple trailers), X (combination of hazmat and tank), S (school bus), and Z (air brake exemption). Check your state's CDL handbook to see which endorsements are available and which your job requires.
Steps to obtain an endorsement
The process for adding an endorsement to your existing CDL is straightforward, though timelines vary depending on the endorsement type.
- Confirm which endorsement you need. Your employer should tell you, or you can check your state's CDL handbook. Do not guess — driving without the correct endorsement is a violation.
- Study the endorsement test material. Your state DMV provides a free CDL handbook that includes a section on each endorsement. Read the relevant section carefully. Many states also offer practice tests online.
- Schedule your test at your local DMV. For most endorsements, you can add the test to your next visit. For HAZMAT, you must complete the background check first (see below).
- Pass the written test. The test is typically 30 to 50 questions, and you must score at least 80 percent. You can usually retake it the same day if you fail.
- Pay the endorsement fee. Fees range from $5 to $50 depending on the endorsement and state. Some states charge per endorsement; others charge a flat fee to add any endorsement.
- Receive your updated license. Your new license will show the endorsement code. This usually happens when ready or within a few days.
For endorsements that require a skills test — typically the P endorsement — you will also need to schedule a separate road test with a DMV examiner. This test covers vehicle inspection, basic control, and on-road driving. Bring your own vehicle or arrange one through a CDL training school.
HAZMAT endorsement: the background check process
The HAZMAT endorsement is the only CDL endorsement that requires a federal background check. This is handled by the Transportation Security Administration (TSA), not your state DMV. The process adds significant time to obtaining the endorsement, so plan ahead if your job requires it.
To begin, you must be a U.S. citizen or permanent resident. You will complete a form called the HME Form (Hazardous Materials Endorsement process) at your DMV. The form asks for your full legal name, date of birth, Social Security number, and citizenship status. You will also provide fingerprints, which the DMV submits to the FBI and TSA for a criminal background check.
The TSA will also check immigration records, outstanding warrants, and certain disqualifying offenses. Disqualifying crimes include felonies involving explosives, weapons, or transportation security; certain drug offenses; and crimes of violence. If you have any of these on your record, you will be denied the HAZMAT endorsement.
The background check typically takes four to six weeks, though it can take longer if there are delays or if the TSA needs additional information. You cannot legally transport hazmat until the check is complete and approved. During this time, you can still drive with your CDL for other purposes. Once approved, the HAZMAT endorsement is added to your license, and you can begin hauling hazmat loads.
Endorsement renewal and expiration
Endorsements are tied to your CDL renewal cycle. When your CDL expires, all endorsements expire with it. You must renew them at the same time you renew your license.
Most endorsements renew automatically if you renew your CDL on time. You will not need to retake the written test unless your state requires it (a few states do). However, if your CDL expires and you let it lapse, you may have to retake all endorsement tests when you reapply.
The HAZMAT endorsement has a separate expiration rule. HAZMAT endorsements expire five years from the date they are issued, regardless of when your CDL expires. If your CDL is valid but your HAZMAT endorsement has expired, you cannot haul hazmat. You must renew the HAZMAT endorsement separately by passing the written test again and undergoing another TSA background check. This can take another four to six weeks, so do not wait until the last minute.
Check your license to see the expiration dates of each endorsement. Some states print them clearly; others require you to contact the DMV. Set a reminder three months before any endorsement expires so you have time to renew.
Common mistakes when obtaining endorsements
One frequent error is assuming you can drive a vehicle that requires an endorsement while your test is pending. You cannot. You must have the endorsement on your license before you operate that vehicle. If you are hired for a job that requires HAZMAT, for example, and the background check is still in progress, you cannot legally haul hazmat loads until it is complete.
Another mistake is confusing endorsement codes across states. The code for passenger transport might be P in one state and S in another. If you move or work across state lines, verify the endorsement codes in each state. Your license from one state is not valid for driving in another state; you must obtain a license in your new state of residence.
A third error is failing to renew HAZMAT endorsements on time. Because HAZMAT has a five-year expiration separate from your CDL, drivers often miss the renewal important date. If your HAZMAT endorsement expires, you lose the right to haul hazmat when ready, even if your CDL is still valid. Your employer may reassign you or suspend you from hazmat duties until you renew.
Finally, some drivers obtain endorsements they do not need, thinking it will make them more marketable. While additional endorsements can sometimes help, they also require maintenance and renewal. Only pursue endorsements that match your actual job or career goals.
Frequently Asked Questions
Can I get multiple endorsements at once?
Yes. You can take multiple endorsement tests in a single DMV visit and add them all to your license. However, if one of them is HAZMAT, you must complete the background check first before you can take any test. Once the background check is approved, you can test for HAZMAT and any other endorsements on the same day.
What happens if I drive a vehicle that requires an endorsement I don't have?
You can be cited for operating a commercial vehicle without the required endorsement. Penalties include fines, points on your license, and possible license suspension. Your employer may also face fines. In some cases, the vehicle itself can be placed out of service until a properly endorsed driver is available.
Do I need to retake the endorsement test when I renew my CDL?
Most states do not require you to retake endorsement tests during renewal if your endorsements are current. However, a few states do require retesting. Check your state's CDL renewal rules. If you let your CDL expire, you will likely have to retake all endorsement tests when you reapply.
How long does the HAZMAT background check take?
The TSA background check typically takes four to six weeks from the date you submit your HME Form at the DMV. Delays can occur if there are name matches, address discrepancies, or if the TSA needs additional information. You cannot haul hazmat until the check is complete and approved.
Can I lose an endorsement without losing my CDL?
Yes. If you commit a serious traffic violation or are convicted of certain crimes, your endorsements can be suspended or revoked while your CDL remains valid. HAZMAT endorsements can also be revoked if you fail a TSA security review. In these cases, you can still drive with your CDL for other purposes, but you cannot perform the endorsed activity until the endorsement is restored or reissued.