Behind-the-Wheel & ELDT Training
Finish Entry-Level Driver Training with an FMCSA-registered provider if you're a first-time Class A/B applicant.
Find an ELDT providerIowa CDL Prep
Iowa CDL Permit Practice Tests & Study Guide
Everything you need to get your Iowa commercial learner's permit — the steps, the DOT medical exam, training requirements, and realistic practice tests aligned with the Iowa CDL manual.
How to Get a CDL Permit in Iowa
In Iowa, commercial learner's permits and CDLs are issued by the Iowa Department of Transportation. Use the facts and steps below for ages, hold times, and what to do next.
50Test questions
80%Passing score
14 daysCLP hold period
- Minimum age
- 18 intrastate / 21 interstate
- CLP validity
- 365 days
- Retest wait
- 1 day
Age, validity & retest
- Minimum age
- 18 intrastate / 21 interstate
- CLP validity
- 365 days
- Retest wait
- 1 day
Step-by-step process
Confirm you're eligible
Hold a valid base license and meet Iowa age rules — 18 in-state, 21 for interstate or hazmat.
Pass the DOT medical exam
Get a DOT physical from a certified examiner and get your medical certificate on file with the Iowa Department of Transportation.
Study the CDL manual
Read the official Iowa CDL manual and practice until you're ready for the written exams.
Pass the written tests and get your CLP
Pass the required knowledge tests (80% to pass) at the Iowa Department of Transportation and get your CLP.
Hold your CLP for 14 days
Practice with a qualified CDL holder for 14 days before you can take the skills test.
Complete ELDT if required
Finish Entry-Level Driver Training with an FMCSA-registered provider if you're a first-time Class A/B applicant.
Pass the skills test and get your CDL
Pass the pre-trip, basic controls, and road test to upgrade your CLP to a full CDL.
Choose Your CDL Class: A, B, or C
The class you need depends on the vehicle you plan to drive in Iowa. Pick your class to see the tests and study material that apply to you.
CDL
Class A CDL
Tractor-trailers, 18-wheelers, and large combination vehicles with a GCWR over 26,001 pounds.
CDL
Class B CDL
Straight trucks, dump trucks, box trucks, and large buses over 26,001 pounds GVWR.
CDL
Class C CDL
Passenger vehicles and hazmat loads that do not fit Class A or B but still require a CDL.
Health requirement
DOT Medical Card / DOT Physical
Before the Iowa Department of Transportation issues your CDL, you must pass a DOT physical — a medical exam performed by a certified examiner that confirms you're fit to operate a commercial vehicle.
The examiner checks your vision, hearing, blood pressure, and general health, then issues a Medical Examiner's Certificate (often called a "DOT medical card"). You file this with the Iowa Department of Transportation, and it must be renewed periodically to keep your CDL valid.
- Required for most CDL applicants before a permit or license is issued
- Performed by an examiner listed on the FMCSA National Registry
- Results in a Medical Examiner's Certificate (DOT medical card)
- Must be kept current — typically renewed every 24 months or sooner
Behind-the-Wheel CDL Training & DOT Medical Examiners
Two federal requirements you'll handle outside the Iowa Department of Transportation testing office.
Finding a DOT Medical Examiner
Your DOT physical must be done by an FMCSA-certified examiner. Use the National Registry to find one near you.
Find a certified medical examinerIowa CDL Permit Study Plan
A simple order to study in so you're ready for every test section on your permit exam.
Start with the general knowledge test
Every Iowa CDL applicant takes this test. Study it first, then take full-length practice tests until you consistently score above 80%.
Practice core testsAdd the tests for your class
Study Air Brakes if your vehicle has them, and Combination Vehicles if you're going for a Class A. Focus on one section at a time.
See class testsLayer in your endorsements
If your job needs hazmat, tanker, passenger, school bus, or doubles/triples, study those sections once your core tests feel solid.
Browse endorsements- Before test day
Review missed questions before test day
Retake practice tests, review every explanation for questions you miss, and only schedule your exam once you pass consistently.
Try a sample quiz
Core tests · Steps 01–02
CDL test sections to study
Add-ons · Step 03
Optional endorsements
Prepare with PrepCDL
Study smarter, practice faster, and walk into your CDL exam prepared.
1000+ Practice Questions
Practice with exam-style questions covering CDL rules, safety, inspections, endorsements, and real test topics.
State-Specific CDL Prep
Study material tailored to your state's CDL manual so you focus on the rules that matter for your test.
Realistic Exam Practice
Build confidence with practice tests, randomized questions, progress tracking, and detailed answer explanations.
Question 1 of 5
What is the most important reason for doing a vehicle inspection?
Frequently Asked Questions
Common questions from CDL applicants in Iowa.
Do I need Entry-Level Driver Training (ELDT) in Iowa?
Yes. Complete ELDT from an FMCSA-registered provider after you get your CLP and before the skills test if you are getting a Class A or B CDL for the first time, upgrading from Class B to Class A, or adding a school bus, passenger, or hazmat endorsement for the first time.
Do I need a DOT medical certificate for a CDL in Iowa?
You must self-certify every time you receive a CDL product. Nonexcepted interstate drivers need a digital Medical Examiner's Certificate on file — examiners submit electronically (digital medicals in Iowa began Oct. 23, 2025). Nonexcepted intrastate drivers must carry a medical certificate while driving but do not turn it in to the DMV; intrastate certifications add a K restriction.
What do I need to bring to apply for a CDL permit in Iowa?
Plan to bring proof of full name, date of birth, Social Security number, citizenship or lawful presence, and Iowa residency (an Iowa license with your address counts; otherwise bring two residency proofs). REAL ID–compliant licenses may already have verified identity documents on file. A CLP costs $12.
Do I need a background check for a hazmat endorsement in Iowa?
Yes. You must be at least 21. Complete hazmat ELDT before the knowledge test for a first-time endorsement, pass the Iowa DOT hazmat exam, and finish a TSA Security Threat Assessment. Start fingerprinting early so approval is on file when Iowa issues or renews your CDL with hazmat.
How long is an Iowa CLP valid?
An Iowa Commercial Learner's Permit costs $12 and is valid for one year from issuance with no renewal period. You must hold it for at least 14 days before the skills test (the count includes the issue day).
Has Iowa resumed non-domiciled CLPs and CDLs?
Yes. Iowa DOT has resumed non-domiciled CLP/CDL issuance. Under FMCSA rules effective March 16, 2026, non-domiciled credentials are limited to non-U.S. citizens with H-2A, H-2B, or E-2 visas. Beginning June 8, 2026, FAS/COFA citizens may apply if their I-94 shows CFA/FSM, CFA/MIS, CFA/RMI, or CFA/PAL. An EAD alone is no longer acceptable, and Mexican or Canadian citizens cannot obtain a non-domiciled CLP or CDL.
How many questions are on Iowa CDL knowledge tests?
The general knowledge test has 50 questions (you may miss up to 10). Combination is 20 questions, air brakes 25, passenger 20, school bus 20, doubles/triples 20, hazmat 30, and tank 20.
What happens if I fail the Iowa pre-trip inspection?
If you do not pass the air-brake check and/or pre-trip vehicle inspection, you must make another appointment to retake the test. That can be two or three weeks out and will delay CDL issuance. Iowa allows a pre-trip inspection memory aid during the test.
Does PrepCDL cover Iowa?
Yes. PrepCDL includes state-specific study guides and practice questions aligned with the Iowa CDL manual, plus prep for every class and endorsement.