The Cy endorsement lets you haul certain hazardous materials in Michigan without a full hazmat endorsement
The Cy endorsement is a Michigan-specific addition to your commercial driver's license that permits you to transport certain non-regulated hazardous materials — mainly used oil, antifreeze, and pesticides — within the state. It is not a federal hazmat endorsement, and it does not allow you to cross state lines with these materials or haul the full range of hazardous cargo that a federal H endorsement covers.
You need a Cy endorsement if your job involves hauling materials that Michigan classifies as hazardous but that fall outside federal Department of Transportation (DOT) rules. The endorsement requires a written test specific to Michigan regulations, a background check, and a fee. It is less restrictive than a full hazmat endorsement but more limited in scope — it applies only to Michigan intrastate transport.
Key Takeaways
- The Cy endorsement covers used oil, antifreeze, pesticides, and other Michigan-regulated materials that do not meet federal hazmat thresholds.
- You must pass a Michigan-specific written test on hazardous materials handling and state regulations to earn the endorsement.
- The Cy endorsement is valid only for intrastate transport in Michigan; you cannot use it to haul these materials across state lines.
- If your job requires hauling hazmat across state lines or materials outside the Cy list, you will need the federal H endorsement instead.
- The endorsement fee and renewal timeline follow Michigan Secretary of State rules and may vary based on your license class.
What materials the Cy endorsement covers
Michigan's Cy endorsement is designed for materials that the state regulates but that do not trigger federal DOT hazmat rules. The most common cargo includes used motor oil, used antifreeze, and certain pesticides. These materials pose environmental or health risks if spilled or mishandled, which is why Michigan requires special licensing to transport them.
The exact list of materials covered under Cy is set by Michigan's Department of State and may be updated. If you are unsure whether a specific material qualifies, contact the Michigan Secretary of State's Commercial Driver License section or your employer's safety officer. Hauling a material that requires Cy without the endorsement is a violation and can result in fines and license suspension.
How the Cy endorsement differs from the federal H endorsement
The federal H endorsement (hazmat) covers a much broader range of dangerous goods — explosives, flammable liquids, poisons, radioactive materials, and many others — and is required for interstate transport of these materials. The H endorsement requires a federal background check, fingerprinting, and a Transportation Security Administration (TSA) clearance in addition to the written test.
The Cy endorsement is Michigan-only and covers a narrower list of materials. You do not need federal clearance for Cy, and the test focuses on Michigan state rules rather than federal DOT regulations. If your route stays within Michigan and your cargo is on the Cy list, Cy is sufficient. If you cross state lines or haul materials outside the Cy scope, you must have the H endorsement instead.
Steps to obtain the Cy endorsement
To add a Cy endorsement to your Michigan CDL, you must first hold a valid CDL in the appropriate class for your vehicle. Then follow these steps:
- Visit a Michigan Secretary of State branch office with your current CDL, proof of Michigan residency, and payment for the endorsement fee.
- Request the Cy endorsement process and study materials. The Secretary of State provides a handbook covering Michigan hazardous materials regulations.
- Study the handbook and prepare for the written test. The test covers handling, placarding, documentation, and emergency procedures specific to Cy materials.
- Pass the written test at the Secretary of State office. You typically have one or two attempts included with your fee; additional attempts may cost extra.
- Once you pass, the Cy endorsement is added to your CDL. You will receive an updated license in the mail or when ready, depending on the office.
The entire process usually takes one to two weeks if you pass the test on your first attempt. If you fail, you can retake the test after a waiting period set by Michigan.
Cy endorsement fees and renewal
Michigan charges a fee to add the Cy endorsement to your CDL. The exact amount depends on your license class and the remaining validity of your current license. As of recent years, the fee ranges but you should confirm the current amount with the Michigan Secretary of State before visiting an office.
The Cy endorsement renews on the same schedule as your CDL. If your CDL is valid for five years, your Cy endorsement is valid for five years as well. When you renew your CDL, you will need to renew the Cy endorsement at the same time. Renewal typically requires passing the written test again, though some states waive the test for renewals — check Michigan's current policy.
When you need Cy versus when you need H
Use this table to determine which endorsement your job requires:
| Your Situation | Cy Endorsement | H Endorsement |
|---|---|---|
| Hauling used oil or antifreeze within Michigan only | Yes | No |
| Hauling pesticides within Michigan only | Yes | No |
| Hauling Cy materials across state lines | No | Yes |
| Hauling explosives, flammables, or poisons | No | Yes |
| Hauling materials not on the Cy list, intrastate | No | Depends on material |
If you are uncertain whether your cargo requires Cy, H, or neither, ask your employer or the Michigan Secretary of State. Driving with the wrong endorsement — or no endorsement when one is required — can result in citations, fines, and suspension of your CDL.
Common mistakes and how to avoid them
One frequent mistake is assuming that Cy covers all hazardous materials. It does not. If your employer asks you to haul something outside the Cy list, you need to confirm whether it requires H or another endorsement before accepting the job.
Another mistake is obtaining Cy and then crossing state lines with Cy-covered materials. The endorsement is valid only in Michigan. If your route includes another state, you must have the federal H endorsement instead, even if the material is on the Cy list.
A third mistake is letting your Cy endorsement expire. If your CDL renewal is coming up, renew both your CDL and Cy at the same time. Driving with an expired endorsement is treated the same as driving without one.
Frequently Asked Questions
Can I use a Cy endorsement to haul materials across state lines?
No. The Cy endorsement is valid only for intrastate transport within Michigan. If your route crosses into another state, you must have the federal H endorsement, regardless of whether the material is on the Cy list. Check your route carefully before accepting a job.
Do I need a background check for Cy like I do for H?
No. The Cy endorsement requires a Michigan state background check but not the federal TSA clearance that the H endorsement requires. The process is faster and less invasive than obtaining hazmat clearance.
What happens if I drive with Cy materials but no Cy endorsement?
You can be cited for operating without the required endorsement. Penalties include fines and potential suspension of your CDL. Your employer can also be held liable. Always confirm you have the correct endorsement before hauling any regulated material.
Can I take the Cy test online or by mail?
No. You must visit a Michigan Secretary of State office in person to take the written test. You cannot take it remotely. Schedule an appointment or visit during walk-in hours at your nearest office.
If I already have an H endorsement, do I also need Cy?
No. The H endorsement covers everything the Cy endorsement covers and more. If you have H, you do not need to add Cy. However, if you only have Cy and your job changes to require H, you will need to obtain the H endorsement separately.