Who this is for: CDL applicants, fleet managers
CDL Age Requirements — Federal and State Minimums
Federal FMCSA regulations require drivers to be at least 21 years old to operate a CMV in interstate commerce. States may issue CDLs to drivers as young as 18 for intrastate operations only.
Federal minimum age for interstate driving
49 CFR Part 391 sets the minimum age at 21 for operating a CMV in interstate commerce. A driver under 21 may not legally operate a CMV across state lines or in interstate commerce, even if their state has issued them a CDL.
Intrastate exception — drivers under 21
States may issue CDLs to drivers as young as 18 for intrastate-only operations. If a driver is between 18 and 20, they may be eligible for a state CDL limited to intrastate driving. The specific intrastate CDL rules differ by state — contact your state CDL agency for details.
DOT pilot program for under-21 interstate drivers
FMCSA has run pilot programs exploring supervised interstate driving for drivers under 21. Check FMCSA's website for the current status of any such programs, as these change and may affect eligibility in certain carriers.
State intrastate CDL programs for drivers under 21
The availability and structure of intrastate CDL programs for 18–20 year olds varies considerably by state. Some states have robust programs with clear pathways; others have limited infrastructure or effectively discourage under-21 intrastate CDL by requiring the same process as the federal program. A driver who obtains a state CDL at 18 for intrastate work and later turns 21 does not need to retake the CDL — they simply update their self-certification with the state to reflect interstate capability.
Age verification in carrier hiring
Carriers hiring CDL drivers for interstate routes must verify the driver meets the federal age minimum. The driver's date of birth appears on their CDL — cross-check it during onboarding. Putting a driver under 21 on an interstate route is a federal violation for the carrier, regardless of what the driver represents about their age or experience. This is one of the fields an FMCSA compliance reviewer will check when examining a DQ file for a recently hired driver.
FMCSA Safe Driver Apprenticeship Pilot Program
The Infrastructure Investment and Jobs Act of 2021 authorized FMCSA to establish a pilot program allowing drivers between 18 and 20 to operate CMVs in interstate commerce under specific conditions. The program requires participating carriers to register with FMCSA and commit to a structured training and supervision framework for each apprentice driver. Apprentices must hold a valid CDL and have completed Entry-Level Driver Training. During the apprenticeship period, driving is conducted in stages — the earliest stage requires a qualified commercial driver to be present in the vehicle while the apprentice operates. Certain cargo types and operations are excluded from the program, including hazmat loads requiring placards and passenger vehicles. Carriers interested in the program should consult the FMCSA website for current enrollment status, carrier eligibility requirements, and the specific conditions applicable to each stage of the supervised driving progression.
Insurance age requirements and the federal minimum
Meeting the federal age minimum does not resolve all hiring constraints for younger interstate drivers. Many commercial trucking insurance policies contain their own minimum age provisions — commonly 21 or 23 for owner-operators and sometimes higher for certain cargo types. A carrier or owner-operator whose insurer requires drivers to be at least 23 cannot legally operate a 21-year-old driver under that policy even though federal rules permit it. Carriers hiring at or near the federal minimum should review their insurance policy terms specifically for age-related restrictions before extending offers. The federal rule sets a floor; the insurer sets the practical ceiling for a given policy.
Frequently Asked Questions
Can an 18-year-old get a CDL?
Many states issue CDLs to drivers as young as 18 for intrastate-only operations. Federal rules require age 21 for interstate commerce. Verify with your state CDL agency for their specific intrastate CDL program.
Does turning 21 automatically make an intrastate CDL holder eligible for interstate operations?
The CDL itself doesn't change, but the driver becomes eligible for interstate operations once they turn 21 and meet all other requirements (current DOT medical certificate, appropriate self-certification on file with the state). No retesting is required just because of the age change.
Are there any age-based restrictions on the types of cargo or vehicles for under-21 drivers?
Under federal rules, drivers under 21 may not operate in interstate commerce at all. Within intrastate operations, some states apply the same class restrictions as federal law regardless of age. The FMCSA under-21 pilot programs have their own conditions — check the current FMCSA program documentation for what cargo types, vehicle classes, and supervision requirements apply.