What an endorsement is and why you need one

An endorsement is an addition to your commercial driver's license that lets you operate specific types of vehicles or cargo. Without the right endorsement, you cannot legally drive that vehicle, even if you hold a CDL. For example, if you want to haul hazardous materials, you need the H endorsement. If you want to pull a double or triple trailer, you need the T endorsement.

Each endorsement requires you to pass a written test on the rules and safety practices for that vehicle or cargo type. Some endorsements also require a skills test. The endorsement itself costs money and takes time to add, but it opens doors to higher-paying jobs and more job options in trucking and transportation.

You can add endorsements to a CDL you already hold, or you can test for endorsements at the same time you test for your CDL. Many drivers add endorsements one at a time as their career progresses, while others get multiple endorsements upfront.

Key Takeaways

  • You must pass a written test for each endorsement you want, and some endorsements require a skills test as well.
  • Hazmat (H), tanker (N), and passenger (P) endorsements require a background check or fingerprinting before you can test.
  • You can add endorsements to an existing CDL or test for them when you first get your CDL.
  • Each state sets its own fee for endorsements, and the cost varies from about $5 to $50 per endorsement.
  • The written test for an endorsement covers vehicle operation, safety, and legal rules specific to that endorsement type.

The endorsements you can add to a CDL

The most common endorsements are hazmat (H), tanker (N), passenger (P), and doubles/triples (T). Hazmat lets you carry hazardous materials like fuel, chemicals, or explosives. Tanker lets you haul liquid cargo in a tank trailer. Passenger lets you drive a bus or vehicle carrying 16 or more people. Doubles/triples lets you pull multiple trailers at once.

Less common endorsements include school bus (S), which requires additional testing and a background check, and air brake (L), which you need if your vehicle has air brakes. Some states also offer a tank vehicle endorsement (N) separate from hazmat. The endorsements available and their requirements vary slightly by state, so check your state's DMV website for the full list.

You do not need every endorsement. Choose the ones that match the work you want to do. A local delivery driver might only need air brakes. A long-haul driver might pursue hazmat and doubles/triples. A bus driver needs passenger and possibly school bus.

Steps to add an endorsement to your existing CDL

First, contact your state's DMV or driver licensing office and ask what documents you need for the endorsement you want. For hazmat, tanker, and passenger endorsements, you will need to complete a background check or provide fingerprints. This step can take one to two weeks. For other endorsements, you may only need your CDL and a valid ID.

Second, study the endorsement manual or test guide your state provides. Each endorsement has its own written test with 20 to 50 questions, depending on the state. The test covers the rules, safety procedures, and vehicle-specific knowledge for that endorsement. You can usually read the study material from your state's DMV website for free.

Third, schedule your written test at your local DMV office. You will take the test on a computer or on paper, depending on your state. If you pass, the endorsement is added to your CDL on the spot or within a few days. If you fail, you can usually retake the test after a waiting period, often 7 to 14 days.

Fourth, if your endorsement requires a skills test (doubles/triples and some others do), you will need to schedule that separately. A skills test involves driving a vehicle with that endorsement while an examiner watches and scores your performance. Skills tests are more expensive than written tests and take longer to schedule.

Background checks and fingerprinting for certain endorsements

Hazmat, tanker, and passenger endorsements require a Transportation Security Administration (TSA) background check or fingerprinting before you can test. This is a federal requirement, not a state one. The background check looks for criminal history, immigration status, and other security concerns.

You will need to submit fingerprints, usually at your local DMV office or a designated fingerprinting location. The fingerprints are sent to the FBI and TSA for review. This process takes one to three weeks. Once you are cleared, you can schedule your written test. If you are not cleared, you will be notified and given a reason; you can appeal the decision in some cases.

The background check is separate from the written test fee. Some states charge for fingerprinting, while others do not. Check your state's DMV website for the exact cost and where to go for fingerprinting in your area.

Written test content and how to study

The written test for each endorsement covers the rules, safety practices, and vehicle-specific knowledge you need to operate that vehicle or carry that cargo safely. For hazmat, the test covers hazard classes, labeling, placarding, and emergency procedures. For tanker, it covers liquid surge, weight distribution, and braking. For passenger, it covers passenger safety, emergency procedures, and vehicle inspection.

Your state's DMV provides a free study guide or manual for each endorsement. These guides are usually available online as a PDF you can read and print. Some states also offer practice tests online. Read the manual carefully, take notes, and use the practice test to find weak areas before you sit for the real test.

The written test is usually 20 to 50 questions, and you must score at least 80 percent to pass. You have a set amount of time, usually 30 to 60 minutes, to complete the test. You can take the test on a computer at the DMV or on paper, depending on your state's system.

Skills tests for endorsements that require them

Some endorsements, like doubles/triples (T) and air brake (L), require a skills test in addition to the written test. A skills test means you drive a vehicle with that endorsement while a state examiner scores your performance. The examiner watches how you handle the vehicle, follow traffic laws, and respond to road conditions.

Skills tests are more expensive than written tests—often $50 to $150 per test—and take longer to schedule. You may wait several weeks for an opening. You must bring your own vehicle or arrange one that meets the state's requirements for that endorsement. For example, to test for doubles/triples, you need to bring a vehicle actually pulling double or triple trailers.

If you fail a skills test, you can retake it after a waiting period, usually 7 to 14 days. Many drivers take a professional training course before attempting a skills test, especially for doubles/triples, because the test is difficult and expensive to retake.

Cost and timeline for adding an endorsement

The cost of an endorsement varies by state. Written test fees range from about $5 to $50 per endorsement. Skills test fees, where required, range from $50 to $150. Background check and fingerprinting fees, where required, range from $0 to $30. Add these costs together for the endorsement you want, then check your state's DMV website for the exact fees.

The timeline depends on whether your endorsement requires a background check and a skills test. If you only need a written test and no background check, you can test within a week or two of studying. If you need a background check, add one to three weeks. If you need a skills test, add another two to six weeks for scheduling and testing.

Plan for a total of two to eight weeks from the time you decide to pursue an endorsement to the time it appears on your CDL. Start with the background check if required, study while you wait for clearance, then schedule your written test and skills test once you are cleared.

Frequently Asked Questions

Can I test for multiple endorsements at the same time?

Yes. You can take multiple written tests on the same day if your state allows it. However, skills tests usually must be scheduled separately and taken one at a time. If you need a background check for any of your endorsements, you must complete it before testing for any of them.

What happens if I fail the written test for an endorsement?

You can retake the test after a waiting period, usually 7 to 14 days. Use that time to study the areas you missed. Most states let you retake the test as many times as you need, though some charge a fee each time. Check your state's rules before your first attempt.

Do I need a skills test for every endorsement?

No. Most endorsements only require a written test. Doubles/triples (T) and air brake (L) typically require skills tests in most states. Some states require skills tests for other endorsements. Check your state's DMV website for the specific requirements of the endorsement you want.

Can I add an endorsement if I have a suspended or revoked CDL?

No. You must have a valid, active CDL to add an endorsement. If your CDL is suspended or revoked, you must restore it first. Once your CDL is valid again, you can pursue endorsements.

How long does an endorsement stay on my CDL?

An endorsement stays on your CDL for as long as your CDL is valid. When you renew your CDL, your endorsements renew with it. However, some endorsements, like hazmat, may require a new background check at renewal time, depending on your state's rules.