Endorsements are add-ons to your commercial driver's license that permit you to operate specific types of vehicles or cargo
A driving endorsement is a notation on your CDL that authorizes you to drive certain classes of commercial vehicles or haul particular cargo that the base license does not cover. Without the correct endorsement, you cannot legally operate that vehicle or transport that load, even if you hold a valid CDL. Endorsements are not separate licenses — they are permissions printed on your existing CDL that expand what you are allowed to do.
The endorsement you need depends on what you will be driving and what you will be carrying. A tanker endorsement, for example, lets you haul liquids in bulk. A hazmat endorsement permits you to transport hazardous materials. A passenger endorsement allows you to operate a bus or other vehicle designed to carry 16 or more people. Each endorsement requires its own written test and, in some cases, a skills test.
States issue endorsements based on federal standards set by the Federal Motor Carrier Safety Administration (FMCSA), so the endorsement codes and requirements are the same across all 50 states. However, the process for obtaining them — the testing location, the fee, and the timeline — varies by state.
Key Takeaways
- Endorsements are printed on your CDL and permit you to operate specific vehicle types or transport particular cargo that your base license does not cover.
- Common endorsements include hazmat (H), tanker (N), passenger (P), and doubles/triples (T), each requiring a separate written test.
- You must pass the endorsement test before you can legally haul that cargo or operate that vehicle, even with a valid CDL.
- Endorsement fees and testing procedures are set by your state DMV, not by the federal government, so costs and timelines differ by state.
The most common CDL endorsements and what they allow
Hazmat (H) permits you to transport hazardous materials — explosives, flammables, poisons, radioactive materials, and other regulated substances. This endorsement requires a written test and a federal background check. You must renew hazmat every five years, and the renewal includes a new background check.
Tanker (N) allows you to haul liquids or gases in bulk tanks. The test covers the physics of liquid surge, proper braking with a full tank, and safe handling of different cargo densities. You do not need hazmat to get tanker, and tanker does not require hazmat — they are independent endorsements.
Passenger (P) permits you to operate a bus, motorcoach, or any commercial vehicle designed to carry 16 or more people. The test includes questions about passenger safety, emergency procedures, and vehicle inspection specific to passenger transport.
Doubles/Triples (T) allows you to pull double or triple trailers. The test covers coupling and uncoupling procedures, weight distribution, and handling the longer wheelbase and reduced maneuverability of multiple trailers.
Other endorsements include Tank Vehicle (N), Hazardous Materials (H), Passenger (P), School Bus (S), Doubles/Triples (T), and Tank Vehicle Hazmat (X), which combines tanker and hazmat into one endorsement. Not all states offer every endorsement, and some endorsements have restrictions or prerequisites.
How endorsement tests work and what to study
Each endorsement requires a written test administered at your state DMV or an approved testing location. The test is multiple-choice and covers the specific knowledge needed for that endorsement. For hazmat, you will answer questions about regulations, placarding, and emergency response. For tanker, you will study liquid dynamics and braking. For passenger, the focus is on safety and emergency procedures.
Most states provide a CDL manual or endorsement study guide that covers all test topics. You can usually read this from your state DMV website at no cost. Some states also offer practice tests online. The number of questions on each endorsement test varies — hazmat typically has 30 questions, tanker has 20, and passenger has 20 — but the passing score is usually 80 percent across all states.
You do not need to take a skills test (the driving portion) to add an endorsement to an existing CDL. You only take the written test. However, if you are obtaining your CDL for the first time and want an endorsement, you will take both the written test for the base license and the written test for the endorsement, plus the skills test for the base license class.
Endorsement fees and processing timelines by state
Endorsement fees are set by individual states and range from $0 to $50 per endorsement, depending on the state and the type of endorsement. Hazmat endorsements often cost more because they include a federal background check. Some states charge a flat fee per endorsement; others charge based on the number of years you want the endorsement to be valid.
Processing time also varies. In some states, you can take the endorsement test and receive your updated CDL on the same day if you pass. In others, the CDL is mailed to you within 5 to 10 business days. A few states require additional processing time if you are adding hazmat, because the background check must clear before the endorsement is issued.
Check your state DMV website for the exact fee and timeline for each endorsement you need. Some states publish this information in a fee schedule; others list it on the CDL page. If you cannot find it online, call your local DMV office — they can tell you the cost and how long the process takes.
When you need an endorsement versus when you do not
You need an endorsement if your job requires you to operate a vehicle or haul cargo that falls under that endorsement category. If you drive a straight truck (not a tractor-trailer) and haul general freight, you do not need any endorsement beyond your base CDL. If you haul hazmat, you must have hazmat. If you drive a school bus, you must have school bus. If you operate a tanker, you must have tanker.
Some jobs require multiple endorsements. A driver who hauls hazardous liquids in a tanker needs both hazmat (H) and tanker (N). A driver who operates a passenger bus carrying hazmat materials needs passenger (P) and hazmat (H). Your employer will tell you which endorsements the job requires, and you should verify this against the FMCSA regulations for your specific cargo or vehicle type.
Operating a vehicle or hauling cargo without the required endorsement is a violation of federal law and can result in fines, out-of-service orders, and loss of your CDL. It is also a liability issue for your employer. If you are unsure whether you need an endorsement, ask your employer or contact your state DMV.
How to add an endorsement to your existing CDL
To add an endorsement to a CDL you already hold, visit your state DMV office or an approved testing location. Bring your current CDL, proof of identity, and proof of residency (if required by your state). Pay the endorsement fee and take the written test for that endorsement. If you pass, your CDL will be updated to include the new endorsement.
Some states allow you to take multiple endorsement tests in one visit. If you need hazmat and tanker, for example, you can take both tests on the same day and pay both fees at once. Your updated CDL will show both endorsements once you pass both tests.
If you fail an endorsement test, you can retake it. Most states allow you to retake the test when ready or within a few days, though some require a waiting period. Check your state DMV rules on retesting. You will usually have to pay the test fee again.
Endorsement renewal and expiration
Endorsements renew on the same schedule as your CDL. If your CDL is valid for five years, your endorsements are also valid for five years. However, hazmat endorsement renewal is different — hazmat must be renewed every five years and includes a new federal background check, even if your CDL is not expiring.
When you renew your CDL, you can renew your endorsements at the same time. In most states, you do not have to retake the endorsement test unless your state requires it as part of renewal. Some states do require a renewal test for certain endorsements; check your state DMV website to confirm.
If your endorsement expires and you do not renew it, you lose the right to operate that vehicle or haul that cargo. You will have to retake the endorsement test to restore it. It is treated as a new endorsement, not a renewal, so you will pay the full fee again.
Frequently Asked Questions
Can I get multiple endorsements at the same time?
Yes. You can take multiple endorsement tests in one visit to your state DMV and pay all fees at once. Each endorsement requires its own written test, but you do not need to take them on separate days. If you pass all tests, your CDL will show all endorsements.
Do I need hazmat to get tanker, or tanker to get hazmat?
No. Hazmat and tanker are independent endorsements. You can have one without the other. However, if you haul hazardous liquids in a tanker, you need both. Some states offer a combined endorsement (X) that includes both hazmat and tanker in one test.
What happens if I drive without the required endorsement?
Operating a vehicle or hauling cargo without the required endorsement is a federal violation. You can be fined, placed out of service, and your CDL can be suspended or revoked. Your employer can also face penalties. Always verify you have the correct endorsement before accepting a job.
How long does it take to get an endorsement added to my CDL?
If you pass the test on the same day, some states issue an updated CDL when ready. Others mail it within 5 to 10 business days. Hazmat endorsements may take longer because of the federal background check. Contact your state DMV for the exact timeline.
Can I renew my endorsement without retaking the test?
In most states, yes — you renew your endorsement when you renew your CDL without retaking the test. However, hazmat always requires a new background check at renewal, and some states require renewal tests for other endorsements. Check your state DMV rules.