Colorado Commercial Driver’s License (CDL) Overview

If you plan to operate a commercial motor vehicle (CMV) in Colorado, you'll need to obtain a Commercial Driver’s License (CDL). The Colorado Division of Motor Vehicles (DMV) enforces federal and state regulations to ensure that CDL holders are qualified to handle large and potentially hazardous vehicles.

CDL Classes in Colorado

Colorado issues three classes of CDLs, based on the type and weight of the vehicle you intend to drive:

• Class A: Required for combination vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more, provided the towed vehicle is over 10,000 pounds.
• Class B: Required for single vehicles with a GVWR of 26,001 pounds or more or towing a vehicle not exceeding 10,000 pounds.
• Class C: Required for vehicles designed to transport 16 or more passengers (including the driver) or those transporting hazardous materials.

Who Needs a CDL in Colorado?

You need a CDL if you plan to operate:

• A vehicle that meets Class A, B, or C requirements
• A school bus, transit bus, or any passenger vehicle with 16+ occupants
• A vehicle transporting hazardous materials requiring placarding under DOT regulations

Some exemptions apply for military personnel and farmers operating within a certain distance of their farms.

Eligibility Requirements

To qualify for a CDL in Colorado, you must:

• Be at least 18 years old for intrastate driving or 21 for interstate driving
• Possess a valid Colorado driver's license
• Provide proof of U.S. citizenship or lawful presence
• Submit a Medical Examiner’s Certificate (Form MCSA-5876)

Learn more about Medical Requirements for Colorado CDL Holders.

Steps to Obtain a CDL

1. Obtain a Commercial Learner’s Permit (CLP)
   You must hold a CLP for at least 14 days before taking the skills test. You'll need to pass written knowledge exams for the class and endorsements you're seeking. Review What to Expect on the Colorado Driving Test to get prepared.

2. Schedule a Skills Test
   After holding your CLP, you must pass a skills test that includes pre-trip inspection, basic control skills, and on-road driving.

3. Submit Documentation and Fees
   Once you pass all exams, submit your paperwork at a CDL office and pay the applicable fees.

Explore the detailed process at How to Obtain a CDL in Colorado.

Endorsements and Restrictions

Depending on the vehicle and cargo type, you may need additional endorsements:

• H: Hazardous materials
• N: Tank vehicles
• P: Passenger transport
• S: School bus
• T: Double/triple trailers
• X: Combination of tank and hazardous materials

Each endorsement requires passing an additional knowledge test, and some may involve further background checks. For complete details, see CDL Endorsements and Restrictions in Colorado.

Renewal and Record Maintenance

Colorado CDLs are typically valid for 4 years. Renewals require updated medical certification and may involve retesting if the license is expired for more than one year. You can check the Colorado Driver’s License Eligibility Guide for more on renewal qualifications.

For official updates, forms, and fee schedules, visit the Colorado DMV’s CDL section.