Class B Exempt is a commercial license for drivers who operate certain vehicles but don't meet the standard Class B requirements

A Class B Exempt license allows you to drive specific commercial vehicles that would normally require a Class B Commercial Driver's License (CDL), but your vehicle or operation falls into a state-defined exemption. The exemption exists because your vehicle, cargo, or driving pattern poses lower risk than standard commercial operations. Each state defines exemptions differently, so what qualifies in one state may not in another.

The most common exemption is for farm vehicles — many states exempt farmers and farm employees from CDL requirements when operating agricultural equipment or transporting farm products within a limited radius of the farm. Other exemptions often cover certain government vehicles, emergency vehicles, or specific commercial uses like mobile equipment repair or certain types of construction work.

You do not automatically get a Class B Exempt license. You must meet the underlying requirements for a Class B CDL (age, medical certification, knowledge tests in some states), but you skip the commercial driving test because your operation qualifies for the exemption. The license itself shows "Exempt" or carries a restriction code that identifies which exemption applies to you.

Key Takeaways

  • Class B Exempt licenses are issued only for specific vehicle types or operations your state recognizes as exempt from full CDL requirements.
  • Farm operations are the most common exemption, but exemptions vary widely by state — check your state DMV website for the complete list.
  • You must still pass the written knowledge test and medical examination required for a Class B CDL, even though you skip the driving test.
  • The license shows your exemption category, and you can only operate vehicles that fall within that exemption — using it outside that scope is a violation.

Which vehicles and operations may have access to for Class B Exempt status

Exemptions depend entirely on your state's regulations. The most widespread exemption covers farm vehicles and farm employees. This typically means you can operate a truck or vehicle to haul farm products, feed, equipment, or livestock if you work for a farm or own one. Most states limit this to a certain radius from the farm — often 50 to 150 miles — and some require the vehicle to be registered as a farm vehicle.

Other common exemptions include government vehicles operated by federal, state, or local agencies; certain emergency vehicles; and sometimes specific commercial uses like mobile home repair, certain construction equipment, or vehicles operated by utility companies for maintenance work. A few states exempt certain types of buses or vehicles used for specific purposes like transporting employees to a work site.

The critical detail is that you can only operate vehicles that fall within your specific exemption. If your license shows "Farm Exempt," you cannot use it to haul commercial freight or operate a dump truck for a construction company. Doing so is a violation and can result in fines, license suspension, or criminal charges depending on your state and the severity of the violation.

Requirements to obtain a Class B Exempt license

You must meet the baseline requirements for a Class B CDL in your state, which typically include being at least 18 years old (some states require 21 for certain exemptions), holding a valid driver's license, and passing a Department of Transportation (DOT) medical examination. The medical exam confirms you meet vision, hearing, and general health standards. You will need to obtain a Medical Certificate (also called a Medical Examiner's Certificate) from a certified medical examiner — not your regular doctor.

Next, you must pass the written knowledge test for Class B vehicles. This test covers air brakes, combination vehicles, and general commercial driving rules. The number of questions and passing score vary by state, but most require 80 percent or higher. Some states allow you to study the CDL manual online or pick one up at the DMV; others provide sample tests on their website.

Because you may have access to for an exemption, you do not take the commercial driving test (the behind-the-wheel exam). You also do not need a Hazmat endorsement or Passenger endorsement unless you are hauling hazardous materials or passengers, which would disqualify you from the exemption in most states. You will need to provide proof that you meet the exemption criteria — for farm exemptions, this might be a farm registration, proof of employment, or a statement from the farm owner.

how the process works for a Class B Exempt license

Start by confirming your state's specific exemptions on your state DMV website. Search for "Class B Exempt" or "CDL Exemptions" and read the exact requirements — some states have detailed pages; others bury this information in the CDL handbook. Write down which exemption category applies to you and what documentation you need to prove it.

Schedule a DOT medical examination with a certified medical examiner. You can find examiners through your state DMV website or by calling your local DMV office. The exam takes 30 to 60 minutes and costs between $75 and $150 (varies by state and examiner). Bring your current driver's license, proof of citizenship or legal residency, and any medical records relevant to your health history. The examiner will issue a Medical Certificate valid for two years.

Visit your local DMV office with the following documents: your current driver's license, Medical Certificate, proof of your exemption (farm registration, employment letter, or ownership documentation), proof of residency, and your Social Security number or ITIN. Some states allow you to study online before you go; others require you to take the written test at the DMV office. Pay the license fee, which varies by state but typically ranges from $40 to $100 for a Class B Exempt license.

Take the written knowledge test at the DMV. You will have a set number of attempts (usually three) to pass. If you fail, you can retake it after a waiting period — typically 7 to 14 days. Once you pass, the DMV will issue your Class B Exempt license. The license is valid for four to eight years depending on your state, and you will need to renew it before it expires.

Renewal and restrictions on a Class B Exempt license

Your Class B Exempt license expires on a set date printed on the card. Renewal timelines vary by state — some send renewal notices 30 to 60 days before expiration, while others do not. Check your state DMV website for the renewal important date and whether you can renew online, by mail, or only in person.

When you renew, you must obtain a new DOT Medical Certificate before or at the time of renewal. If your Medical Certificate expires before your license does, your license becomes invalid for commercial driving until you renew the medical certificate. Some states allow you to renew the medical certificate at any certified medical examiner; others require you to use the same examiner or a specific network.

Your exemption status does not automatically carry over to a renewed license. If your circumstances change — for example, you no longer work on a farm or your farm operation ends — you must notify the DMV. Continuing to use an exemption you no longer may have access to for is a violation. Conversely, if you want to upgrade to a full Class B CDL, you can do so by taking the commercial driving test and meeting any additional requirements your state imposes.

Common mistakes and what disqualifies you

The most frequent error is operating a vehicle outside your exemption category. If your license is "Farm Exempt" and you use it to haul freight for a trucking company, you are driving without a valid CDL. This can result in fines of $500 to $5,000, points on your license, license suspension, and in some cases criminal charges. Law enforcement can check your license status during a traffic stop, and commercial vehicle inspections will flag a mismatch between your license and your cargo.

Another common mistake is letting your Medical Certificate expire without renewing it. Your Class B Exempt license remains valid, but you cannot legally operate a commercial vehicle once the medical certificate lapses. Some drivers do not realize this and continue driving, which is a violation. Check your Medical Certificate expiration date and plan to renew it at least 30 days before it expires.

Failing to update your exemption status when your circumstances change is also a violation. If you sell your farm or change jobs, contact your state DMV to update or cancel your exemption. Continuing to hold an exemption you no longer may have access to for and using it to drive is fraud and can result in serious penalties.

State-by-state differences in Class B Exempt rules

Exemption categories and requirements differ significantly across states. Some states have broad farm exemptions that cover a 150-mile radius; others limit it to 50 miles or require the vehicle to be registered as a farm vehicle. A few states exempt certain government and emergency vehicles; others do not. Some states require a written test for Class B Exempt; others waive it if you already hold a Class A CDL or have prior commercial experience.

Medical certificate requirements also vary. Most states require a DOT medical exam, but a few states have modified requirements for certain exemptions. Renewal periods range from four to eight years, and some states charge different fees for exempt versus standard CDL licenses.

Because rules are state-specific, do not assume what applies in one state applies in yours. Contact your state DMV directly or visit the official DMV website to confirm exemption categories, required documents, fees, and renewal procedures. If you plan to move to another state, check that state's rules before you relocate — your exemption may not transfer, and you may need to obtain a new license.

Frequently Asked Questions

Can I use a Class B Exempt license to haul freight or work for a trucking company?

No. A Class B Exempt license is valid only for the specific operation or vehicle type listed on your license. If your exemption is for farm use, you can only operate farm vehicles. Using it for any other commercial purpose is a violation and can result in fines and license suspension.

Do I need a Class B Exempt license if I operate a farm vehicle on my own property?

It depends on your state. Some states exempt farm vehicles operated only on private property from CDL requirements entirely. Others require a Class B Exempt license even for on-property use. Check your state DMV website or call your local office to confirm whether you need a license for your specific situation.

What happens if my Medical Certificate expires while my Class B Exempt license is still valid?

Your license remains valid, but you cannot legally operate a commercial vehicle until you renew your Medical Certificate. Driving without a current medical certificate is a violation. Renew your medical certificate at least 30 days before it expires to avoid a gap in your ability to drive.

Can I upgrade from a Class B Exempt license to a full Class B CDL?

Yes. You can take the commercial driving test and meet any additional requirements your state imposes to obtain a full Class B CDL. This allows you to operate any Class B vehicle, not just those covered by your exemption. Contact your state DMV for the specific steps and fees.

If I move to another state, does my Class B Exempt license transfer?

No. You must obtain a new license in your new state. Exemption categories and requirements vary by state, so your exemption may not exist in the new state or may have different rules. Contact the new state's DMV to determine what license you need and what documents to bring.