A Commercial Driver's License (CDL) is required in Iowa to operate commercial motor vehicles over 26,000 lbs GVWR, buses carrying 16 or more passengers, or vehicles placarded for hazardous materials. Iowa CDL fees start at $52 for a 4-year license. Three CDL classes are available: Class A for tractor-trailer combinations, Class B for single large vehicles, and Class C for passenger and HazMat vehicles. First-time applicants must complete Entry Level Driver Training (ELDT) through an FMCSA-registered provider before taking the skills test. All interstate CDL holders must maintain a valid DOT Medical Certificate. Test your knowledge with the Iowa CDL knowledge test, then pass the skills test — pre-trip inspection, basic vehicle control, and road driving — to earn your license.
Any combination of vehicles with a GCWR of 26,001 lbs or more, provided the GVWR of the towed vehicle exceeds 10,000 lbs.
Any single vehicle with a GVWR of 26,001 lbs or more, or any such vehicle towing a vehicle with a GVWR not exceeding 10,000 lbs.
Any single vehicle or combination not covered by Class A or B, designed to transport 16 or more passengers including the driver, or required to be placarded for hazardous materials.
TSA security threat assessment and fingerprinting required. Required for anhydrous ammonia hauling (Iowa's primary crop nitrogen fertilizer), propane delivery, and fuel tanker operations throughout the state's agricultural network.
Required for bulk liquid/gas tank vehicles. Essential for anhydrous ammonia applicators (spring crop season), liquid fertilizer delivery, fuel tanker operations, and ethanol transport from Iowa's numerous ethanol production facilities.
Required for vehicles carrying 16 or more passengers. Used for DART metro transit, Coralville Transit, and regional transportation services.
Requires P endorsement. Iowa requires background check for school bus operators.
Required for double and triple trailer combinations on designated routes. Iowa permits standard doubles and certain Rocky Mountain Double configurations on designated highways. Class A CDL required.
Combination H and N endorsements for HazMat tank vehicles. TSA background check applies. Standard for anhydrous ammonia and ethanol tanker operations — both are critical in Iowa's agricultural supply chain.
Entry Level Driver Training (ELDT) is required by federal regulation (49 CFR Part 380, effective Feb 7, 2022) for first-time Class A or B CDL applicants and for adding H, P, or S endorsements. Iowa has registered CDL training providers in Des Moines, Cedar Rapids, Davenport, Sioux City, and other metro areas. Find registered providers at tpr.fmcsa.dot.gov.
Find a registered ELDT provider in Iowa →Interstate CDL holders must hold a valid DOT Medical Examiner's Certificate from an FMCSA-certified medical examiner. MEC valid up to 24 months. Submit self-certification and MEC copy to Iowa DOT MVD. Iowa's flat terrain reduces grade-related cardiovascular stress, but extreme temperature swings (hot, humid summers and severe winters with blowing snow) are relevant health considerations for CDL drivers.
Find an FMCSA-certified medical examiner →Apply at an Iowa DOT Driver's License Office with proof of identity, Social Security Number, and Iowa residency. Pass the knowledge tests for your desired class and endorsements, complete ELDT through an FMCSA-registered provider, then pass the CDL skills test. The CDL fee is $52. Full details and office locations at iowadot.gov.
Iowa CDLs are valid for 4 years. Your DOT Medical Certificate must be renewed separately — typically every 24 months for interstate drivers. Iowa has a 30-day CDL transfer window for new residents — shorter than many states, so act quickly after establishing residency.
Yes. Iowa allows 96,000 lbs gross vehicle weight for 8-axle vehicle combinations on Iowa Interstate highways — 16,000 lbs more than the standard 80,000 lb federal limit. This higher allowance benefits Iowa's grain, pork, and agricultural supply chain operators who use multi-axle configurations to maximize payload efficiency on the state's heavily used Interstate corridors.
The N (Tank) endorsement is highly valuable for anhydrous ammonia applicators (spring) and liquid fertilizer haulers, plus ethanol tanker operations year-round. The H endorsement (or X combination) is required for anhydrous ammonia (classified HazMat due to toxicity). Class A CDL is the foundation for grain semi, livestock transport, and general agricultural hauling. The combination of Class A + X endorsement positions drivers well for Iowa's full agricultural freight spectrum.
Iowa's fall harvest season (late September through November) is an all-hands-on-deck period for CDL drivers. Grain semis run virtually around the clock moving corn and soybeans from fields to elevators and processing facilities. County roads see intense grain cart and semi traffic. Harvest-related road damage and grain spills on county roads are common. Drivers should exercise extra caution on rural roads during harvest, watch for slow-moving farm equipment at all hours, and plan extra time for elevator queues at busy local elevators.
Browse commercial trucks for sale from dealers in Iowa on TruckRadar.
Iowa CDL fees are $52 for original and renewal, with 4-year validity. Knowledge test fees are minimal. Skills test fees vary by provider. Verify current amounts at iowadot.gov before scheduling. Iowa CDL applicants in rural counties may need to travel to a larger city for skills testing.
Disclaimer
The information on this page is compiled from publicly available government sources and is provided for general informational purposes only. TruckRadar is an independent search engine — we are not affiliated with any government agency and this content does not constitute legal or compliance advice. Regulations change frequently; always verify current requirements directly with the official source before making compliance decisions.
Official source: Iowa IA Official DMVLast reviewed: April 8, 2026