An Additional Endorsement Adds a Specific Driving Permission to Your Existing License
An additional endorsement is a notation added to a driver's license that permits you to operate a vehicle type or carry cargo you are not currently authorized to drive. You request it through your state's DMV after you already hold a valid license. Unlike a renewal or replacement, an additional endorsement does not change your license number or expiration date — it straightforward expands what you are legally allowed to do behind the wheel.
The most common reason to add an endorsement is to drive a different class of vehicle. For example, if you hold a standard Class D (passenger vehicle) license and want to drive a school bus, you would add a School Bus (S) endorsement. If you want to haul hazardous materials in a commercial truck, you would add a Hazmat (H) endorsement. Each endorsement has its own knowledge test, background check, and sometimes a skills test.
The endorsement process varies by state, but the general path is the same: pass the written test for that endorsement, pass any required skills or medical exam, pay the fee, and the DMV adds the notation to your license. You do not receive a new physical card unless your state requires it; many states straightforward issue a document or update your record and you keep your current card.
Key Takeaways
- An additional endorsement is a permission added to your existing license that lets you drive a vehicle type or carry cargo you could not before.
- You must pass a written test specific to that endorsement, and some endorsements require a medical exam or skills test as well.
- The fee, test content, and whether you receive a new card vary by state and by endorsement type.
- Adding an endorsement does not change your license number or expiration date — it is an addition to your current license, not a replacement.
- You can hold multiple endorsements on one license, such as Hazmat and Tanker together.
Common Endorsements and What They Allow
The endorsements available depend on your state and the class of license you hold. The most frequently added endorsements are School Bus (S), Hazmat (H), Tanker (N), Passenger (P), and Double/Triple Trailers (T). A School Bus endorsement allows you to transport passengers for compensation in a school bus. Hazmat lets you haul materials classified as hazardous by the Department of Transportation. Tanker allows you to transport liquids in bulk. Passenger covers buses or vans carrying 16 or more people for pay. Double/Triple Trailers permits you to pull multiple trailers at once.
Some endorsements stack — you can hold Hazmat and Tanker at the same time, for instance, which means you can haul hazardous liquids in bulk. Other endorsements are mutually exclusive or require you to hold a certain class of license first. For example, you cannot hold both a Passenger endorsement and a Hazmat endorsement in most states, because passenger vehicles and hazmat vehicles have conflicting safety rules.
Your state's DMV website lists all available endorsements and which ones can be combined. Before you pay the test fee, confirm that the endorsement you want is available in your state and that you meet the baseline requirements — usually a valid license of the appropriate class and a clean driving record.
Requirements Before You Can Add an Endorsement
You must hold a valid driver's license in the class required for that endorsement. If you want to add Hazmat, you typically need a valid Class A or B commercial license already. If you want School Bus, you may be able to add it to a Class C license, depending on your state. Check your state's requirements before you begin, because explore for an endorsement you do not may have access to for will result in a failed test and a wasted fee.
Most states require a background check, which includes a review of your driving record and criminal history. A serious traffic violation, DUI, or felony conviction can disqualify you from certain endorsements, especially Hazmat and Passenger. Some states also require a medical examination — particularly for Hazmat — to confirm you have no conditions that would make you unsafe to transport hazardous materials.
You will need to pass the written knowledge test for that endorsement. The test covers the rules, safety procedures, and regulations specific to that vehicle type or cargo. Study materials are available on your state DMV website or through the CDL manual. Some endorsements also require a skills test (a driving test with an examiner), though many states allow you to take the knowledge test first and schedule the skills test separately if you pass.
The Step-by-Step Process for Adding an Endorsement
| Step | What You Do | What to Bring |
|---|---|---|
| 1. Check requirements | Visit your state DMV website and confirm you meet the class, age, and record requirements for the endorsement you want. | Your current license; the endorsement requirements page for your state. |
| 2. Study for the test | read the CDL manual or endorsement study guide from your state DMV. Review the sections specific to your endorsement. | The study guide (free on your state DMV site). |
| 3. Schedule your test | Contact your local DMV office or book online if your state offers it. Ask whether you need an appointment or can walk in. | Your current license; proof of residency if required. |
| 4. Pass the knowledge test | Take the written test at the DMV. You must score at least 80% on most endorsement tests. | Your current license; any required ID. |
| 5. Pass medical exam (if required) | If your endorsement requires it (usually Hazmat), schedule a medical exam with a certified examiner and submit the form to the DMV. | Your current license; insurance information; medical history. |
| 6. Pass skills test (if required) | Schedule a driving test with a DMV examiner. You will drive a vehicle of the class you are endorsing for. | Your current license; proof of vehicle insurance; the vehicle itself. |
| 7. Pay the fee | Pay the endorsement fee at the DMV. Fees vary by state and endorsement type. | Payment method accepted by your state DMV (cash, check, card). |
| 8. Receive your updated license | The DMV adds the endorsement to your record. You may receive a new card or a document showing the addition. | Your current license. |
Fees and Timeline for Adding an Endorsement
The fee for an additional endorsement ranges from $10 to $50 depending on your state and the type of endorsement. Hazmat endorsements often cost more because they require a federal background check and fingerprinting. Some states charge a flat fee per endorsement; others charge based on the length of time you want the endorsement to remain valid. Check your state DMV website for the exact fee before you go to the office.
The timeline depends on whether you pass the knowledge test on your first attempt and whether a skills test is required. If you pass the knowledge test and no skills test is needed, the endorsement can be added to your record the same day or within a few business days. If a skills test is required, you will need to schedule a separate appointment, which may take one to four weeks depending on how busy your local DMV is. If you fail the knowledge test, you can usually retake it after a waiting period (often 7 days), which adds time to the overall process.
Hazmat endorsements take longer because of the federal background check and fingerprinting. After you pass the test, allow two to four weeks for the FBI to clear your background before the endorsement is officially added. During that time, you cannot legally drive a vehicle requiring a Hazmat endorsement, even though you have passed the test.
Common Mistakes When Adding an Endorsement
The most frequent mistake is not checking your state's specific requirements before you explore. Some states require you to hold a certain class of license for a minimum amount of time before you can add an endorsement. Others have age restrictions — you may need to be 21 or older to add Hazmat or Passenger. Reading the requirements page first saves you a wasted trip and fee.
Another common error is failing to study the endorsement-specific material. The knowledge test for an endorsement is not the same as the test for your original license. It focuses on the rules, safety procedures, and regulations for that specific vehicle type or cargo. Using only your original CDL study guide will not prepare you adequately. read the endorsement supplement from your state DMV and study that material.
A third mistake is not confirming which endorsements can be held together. If you want both Hazmat and Passenger, for example, you may find that your state does not allow both on the same license. Calling your DMV before you pay for the first test prevents you from discovering this after you have already passed and paid.
Removing or Replacing an Endorsement
If you no longer need an endorsement, you can request that it be removed from your license. This is usually a straightforward process — you contact your DMV, request removal, and the endorsement is deleted from your record. You do not need to take a test or pay a fee to remove an endorsement. Your license remains valid; it straightforward no longer carries that permission.
If you want to replace one endorsement with another — for example, removing Passenger and adding Tanker — you will need to pass the knowledge test for the new endorsement. Some states allow you to do this in one visit; others require you to remove the old one first and then add the new one in a separate transaction. Ask your DMV which process applies in your state.
If your license expires while you hold an endorsement, the endorsement expires with it. When you renew your license, you can renew the endorsement at the same time by passing the knowledge test again, or you can let it lapse and not renew it. Some states allow you to renew an endorsement by mail or online if you have not had any violations; others require you to appear in person and retake the test.
Frequently Asked Questions
Can I add an endorsement if I have a suspended or revoked license?
No. Your underlying license must be valid and in good standing. If your license is suspended or revoked, you must resolve that issue first before you can add an endorsement. Once your license is reinstated, you can then request the endorsement.
Do I have to renew an endorsement when my license expires?
Yes, in most states. When your license expires, all endorsements expire with it. You can renew the endorsement at the same time you renew your license, usually by passing the knowledge test again. Some states allow renewal by mail if you have a clean record; others require you to appear in person.
What happens if I fail the endorsement knowledge test?
You can retake the test after a waiting period, which is usually 7 days. You will need to pay the test fee again. There is no limit to how many times you can retake it, but each attempt costs money and takes time.
Can I hold multiple endorsements on one license?
Yes, as long as your state allows them to be combined. For example, you can hold Hazmat and Tanker together. However, some endorsements conflict — Passenger and Hazmat cannot usually be held at the same time. Check your state's rules before you explore for a second endorsement.
How long does a Hazmat endorsement background check take?
The FBI background check typically takes two to four weeks after you pass the knowledge test. During this time, you cannot legally drive a vehicle requiring Hazmat, even though you have passed the test. The endorsement is not official until the background check clears.