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FREE IA CDL INFO | DMV Locations | Fees Forms | FAQs | Iowa CDL Requirements

Find official Iowa CDL test requirements to get your IA CDL - FREE information - FAST and EFFICIENT.

Jump to official Iowa CDL website information.

Iowa CDL Info | IA CDL Requirements

Iowa CDL Learner Permit Training Program
Iowa CDL Practice
Test Prep
IA CDL  School Bus

Iowa CDL (commercial driver's license) License Fees

  • Class A (commercial) Two years min. - Five to eight years max. $8 per year
  • Class B (commercial) Two years min. - Five to eight years max. $8 per year
  • Class C (commercial) Two years min. - Five to eight years max. $8 per year
  • Double/Triple trailers $5
  • Passenger $10
  • Tank vehicles $5
  • Hazardous materials* $5*
  • School bus $10
  • Remove air brake restriction $10
*The hazardous material endorsement fee must be paid every time a CDL is renewed. The hazardous material knowledge examination is also required.

Iowa CDL Written Knowledge Tests

You will need to pass the Iowa Knowledge Tests that are required for the class of license, restriction, and endorsements you wish to possess. A general knowledge test for the Class A or Class B and C license must be successfully completed by all CDL applicants. The information needed to pass these tests is contained in the FREE Iowa CDL Handbook. Please read and study this manual carefully.
  • Class A - 70 Questions (50 GK + 20 Combination Vehicles) - Skills test required.
  • Class B - 50 Questions - Skills test required.
  • Class C - 50 Questions - Skills test required for bus, school bus and air brakes vehicles..
  • Passenger Endorsement - 20 questions - Skills test required in bus.
  • School Bus Endorsement - 25 questions - Skills test required in school bus.
  • Doubles/Triples Endorsement - 20 questions - No additional skills tests.
  • Tank Vehicle Endorsement - 20 questions - No additional skills tests.
  • Hazardous Materials Endorsement - 30 questions - No additional skills tests.
  • Air Brake Restriction Removal - 25 questions - Additional skills test in vehicle with Air Brakes.

Go to Iowa CDL Selector Tool
If you need help . . .
determining what Class of CDL you need based upon the type of vehicle you will drive (A, B or C) or are not sure which CDL Endorsements you need based upon the type of loads you will carry; use the free CDL Selector Tool . . .
Iowa
Go to CDL Selector Tool
(Use only for a new CDL)
Not sure which IA CDL Tests you need to pass? Use this tool to determine what Class of CDL and which CDL Endorsements you require.

Classes of Iowa CDL and Required Tests

CDL Class Tests Required Possible Endorsements and Required Tests
Class A
(Combination
vehicle endorsement required)

General Knowledge Written Exam

Combination Endorsement Written Exam

Road Exam

H - Hazardous Materials Written Exam
N - Tank Vehicles Written Exam
P - Passenger Transport Written and Road Exam
T - Doubles/Triples Written Exam
X - HazMat and Tank Vehicles Written Exam
L - Air Brakes Written and Road Exam
S - School Bus Written and Road Exam
Class B

General Knowledge Written Exam

Road Exam

H - Hazardous Materials Written Exam
N - Tank Vehicles Written Exam
P - Passenger Transport Written and Road Exam
X - HazMat and Tank Vehicles Written Exam
L - Air Brakes Written and Road Exam
S - School Bus Written and Road Exam
Class C

General Knowledge Written Exam

Road Exam

Note: If upgrading to a Class C from a Class D, no road test is required UNLESS the endorsement requires one.
H - Hazardous Materials Written Exam
N - Tank Vehicles Written Exam
P - Passenger Transport Written and Road Exam
X - HazMat and Tank Vehicles Written Exam
L - Air Brakes Written and Road Exam
S - School Bus Written and Road Exam

Iowa CDL Endorsements

Exam Time Allowed (Minutes) # of Questions on Exam # of Correct Answers Needed to Pass
General Knowledge 60 50 40
Air Brakes 25 25 20
HazMat 30 30 24
Tank 20 20 16
Passenger 20 20 16
Doubles/Triples 20 20 16
Combination Vehicles 20 20 16
School Bus 20 20 16

Quickly access the most complete and accurate Official Iowa CDL Information

Iowa CDL Manual, CDL Iowa Handbook
Iowa CDL Requirements

Access Official Federal CDL General Information

Access Official Federal CDL Medical Requirements Info

Access Official Federal CDL Hazardous Materials Info

Click on the items above to find answers to your Iowa CDL questions

  • What is a Commercial Drivers License (CDL)?
  • How to get a Iowa CDL (Commercial Driver's License)
  • How old do you have to be to get a Iowa CDL (Commercial Driver's License)
  • How to get a Iowa CDL HazMat (Hazardous Materials Endorsement) Permit
  • What is the difference between Interstate and Intrastate?
  • How to get a free Iowa CDL Study Guide
  • How to get a Iowa School Bus CDL
  • How much does a Iowa CDL cost?
  • Where is my nearest Iowa DMV CDL office located?
  • Where can I find Iowa CDL (commercial drivers license) forms?
  • What are the Iowa CDL Medical Requirements?

. . . and answers to many more Iowa CDL questions!

Are YOU ready to get YOUR Iowa CDL?
Prepare for YOUR Iowa CDL Tests NOW . . .

 Iowa CDL License
In addition to the Iowa CDL (commercial driver's license) information found in our website covering the Iowa CDL and in the free Iowa CDL Handbook (which is quite boring and a bit confusing - and doesn't have a single multiple-choice question in it that is asked on the actual tests), the complete online Iowa CDL Practice Test prep program will prepare you to easily pass your Iowa CDL written exams to get your Iowa CDL permit. The skills test modules are invaluable to give you a head start before doing your behind the wheel work, possibly saving you a lot of money. The Iowa CDL test prep program includes the following features . . .
  • Covers ALL Eight Iowa CDL written tests.
    • In separate study modules - you won't need all of them - don't waste time on what you don't require.
  • Covers ALL Three Iowa CDL skills tests.
    • In separate study modules - you won't need all of them - don't waste time on what you don't require.
  • 670 practice Iowa CDL test questions with actual answers.
  • Access to CDL videos covering written and skills tests.
  • CDL study guide in both text and audio - listen as you read along.
  • CDL study Quick Reviews.
  • Interactive online CDL Quizzes.
  • and much more!
May your new CAREER be prosperous!!!

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Michael Hamilton
Director
Free CDL Practice Test "Thank you for a great CDL prep course. I needed a CDL quick for a job offer. I was able to pass my tests in less than two weeks. I am making a lot more money than my last job." - T.W., San Jose, CA
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