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 providerIllinois CDL Prep
Illinois CDL Permit Practice Tests & Study Guide
Everything you need to get your Illinois commercial learner's permit — the steps, the DOT medical exam, training requirements, and realistic practice tests aligned with the Illinois CDL manual.
How to Get a CDL Permit in Illinois
In Illinois, commercial learner's permits and CDLs are issued by the Illinois Secretary of State. Use the facts and steps below for ages, hold times, and what to do next.
30Test questions
80%Passing score
14 daysCLP hold period
- Minimum age
- 18 intrastate / 21 interstate
- CLP validity
- 365 days
- Retest wait
- 1 day
- Triple trailers
- Not permitted on state roadways
Age, validity & retest
- Minimum age
- 18 intrastate / 21 interstate
- CLP validity
- 365 days
- Retest wait
- 1 day
- Triple trailers
- Not permitted on state roadways
Step-by-step process
Confirm you're eligible
Hold a valid base license and meet Illinois 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 Illinois Secretary of State.
Study the CDL manual
Read the official Illinois 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 Illinois Secretary of State 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 Illinois. 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 Illinois Secretary of State 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 Illinois Secretary of State, 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 Illinois Secretary of State 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 examinerIllinois 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 Illinois 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 Illinois.
Do I need Entry-Level Driver Training (ELDT) in Illinois?
Yes. Effective February 7, 2022, Illinois requires ELDT before skills testing for first-time passenger or school bus endorsements, and before the hazmat knowledge test for a first-time Hazardous Materials endorsement. First-time Class A or B applicants also need ELDT under federal rules.
Do I need a DOT medical certificate for a CDL in Illinois?
All CLP and CDL applicants must self-certify as NI, EI, NA, or EA. Non-excepted interstate (NI) drivers must keep a current Medical Examiner's Certificate from a National Registry examiner on file with the Secretary of State. Medical certificates after June 30, 2025 must be submitted electronically by the examiner.
What do I need to bring to apply for a CDL permit in Illinois?
Plan to bring your valid Illinois base license, Proof of Legal Presence, and identification documents verifying name, date of birth, Social Security number, and Illinois residency. Adding a CLP to a non-CDL costs $50. Self-certify your medical category; NI drivers need a current medical certificate on file.
Do I need a background check for a hazmat endorsement in Illinois?
Yes. The Illinois Secretary of State requires a TSA Security Threat Assessment on file before you take the hazmat written test for an H or X endorsement. First-time applicants also need hazmat ELDT before testing. Retesting and a new assessment are required at every renewal — begin about 60 days before your CDL expires if you want to keep hazmat.
How long is an Illinois CLP valid?
An Illinois Commercial Learner's Permit is valid for one year from temporary issuance. Your Illinois base license must stay valid for the full CLP period. Adding a CLP to a non-CDL costs $50; renewing an original CLP also costs $50 and requires retesting.
Are Illinois CDL knowledge tests offered in Spanish?
No. Illinois Secretary of State CDL knowledge tests are administered in English only. You may request an audio (computer-read) format, and after trying audio you can ask facility management about an oral test read by SOS personnel.
What is Illinois's third-time fail rule?
After failing the same CDL exam three times, you must wait 30 days. Six failures of the same exam require a 90-day wait, and nine failures require a one-year wait. Additional fees apply after each three-time fail waiting period.
Can military members get an Illinois CDL testing waiver?
Yes. Illinois offers an Even Exchange (knowledge and skills waived for qualifying MOS/ratings) and a Skills Waiver (skills only) for eligible active members and those discharged within the past 12 months seeking an initial CDL. Commanding officers submit applications to [email protected].
Does PrepCDL cover Illinois?
Yes. PrepCDL includes state-specific study guides and practice questions aligned with the Illinois CDL manual, plus prep for every class and endorsement.