Idaho CDL Requirements: Permit, Training, and Skills Test

To meet Idaho CDL requirements, you need to be old enough and experienced enough to apply, pass a DOT medical exam, finish federally registered Entry-Level Driver Training, earn a commercial learner’s permit by passing written knowledge tests, hold that permit at least 14 days, and then pass a three-part skills test given by a certified third-party examiner. The commercial driver’s license is issued by the Idaho Transportation Department through county driver’s license offices, and most applicants spend several weeks and a few hundred dollars moving through the steps.

Who Can Apply

You must be at least 18 to apply for an Idaho CDL, and that minimum only covers intrastate driving. If you plan to cross state lines or haul placarded hazardous materials, you must be 21.¹ An 18-year-old with an Idaho CDL cannot legally run a load from Boise into a neighboring state.

You also need a valid Idaho Class D (non-commercial) driver’s license and at least one full year of licensed driving experience before a CDL can be issued.¹ If you moved from another state, a driving record or an expired out-of-state license showing an issue date more than a year ago will satisfy the experience requirement. Expect to prove Idaho residency with documents like utility bills or a lease, and to verify your Social Security number at the county driver’s license office.

Medical Exam and Self-Certification

Every applicant must pass a physical performed by a provider listed on the Federal Motor Carrier Safety Administration’s National Registry of Certified Medical Examiners.² Only providers on that registry can issue the Medical Examiner’s Certificate (Form MCSA-5876) Idaho requires. You can search the registry online to find an examiner nearby. The certificate must stay current the entire time you hold a CDL. If it lapses, your commercial driving privileges are downgraded until you get a new one.

Alongside the medical exam, you file a CDL Self-Certification form (ITD 3117) that categorizes the type of commercial driving you intend to do. Federal rules set four categories:³

Non-Excepted Interstate: you drive across state lines and must keep a current medical certificate on file. Most CDL holders are here.
Excepted Interstate: you cross state lines only for specifically exempt purposes such as transporting school children or performing emergency services. No federal medical certificate required.
Non-Excepted Intrastate: you drive only within Idaho and must meet the state’s medical certification requirements.
Excepted Intrastate: you drive only within Idaho in activities the state has determined do not require medical certification.

Picking the wrong category is a common mistake. If you do any non-excepted driving, you must select the non-excepted category even if some of your trips would otherwise qualify as excepted.

Entry-Level Driver Training

Federal regulations under 49 CFR Part 380 require all first-time Class A and Class B applicants to complete Entry-Level Driver Training through a provider registered on the FMCSA’s Training Provider Registry before taking the skills test. The same requirement applies to anyone adding a passenger, school bus, or hazardous materials endorsement for the first time.⁴ You cannot schedule your skills test until your training provider certifies your completion in the federal registry, and this is a step people sometimes discover too late.

ELDT has two components. Theory training covers vehicle systems, pre-trip inspections, cargo handling, hours-of-service rules, and basic vehicle control. It can be completed online or in a classroom, and it is proficiency-based rather than hour-based. Behind-the-wheel training must be done in person and splits into range training on a closed course (backing maneuvers, coupling and uncoupling, inspections) and public-road training covering turning, shifting, highway driving, and traffic navigation.

Before enrolling anywhere, verify the school appears in the Training Provider Registry at tpr.fmcsa.dot.gov. Training from an unregistered provider will not count, and the state will not let you move to skills testing. Costs and program lengths vary significantly between providers.

Commercial Learner’s Permit

With your medical certificate, self-certification form, and ELDT theory training in hand, you go to a county driver’s license office for the written knowledge tests. Idaho Code § 49-313 requires a vision screening, a written exam on traffic laws, and additional knowledge tests depending on the vehicle class and endorsements you want.⁵ Every applicant takes the General Knowledge test. Class A applicants also take the Combination Vehicles test. Each endorsement you want — tanker, doubles/triples, hazmat — adds its own written test.

Each written test costs $5. If you fail, you can retake it after a three-day waiting period for another $5. The commercial learner’s permit itself costs $29 and is valid for one year.⁶ Once issued, the permit lets you practice on public roads as long as a fully licensed CDL holder rides in the front passenger seat to supervise.

Skills Test and License Issuance

Federal rules require you to hold the commercial learner’s permit for at least 14 days before taking the skills test.⁷ That is a floor, not a recommendation; most people practice considerably longer. You also need to finish the behind-the-wheel portion of your ELDT training before testing.

The skills test has three parts. The pre-trip vehicle inspection tests whether you can walk around a vehicle and identify safety defects and component functions. Basic vehicle control covers maneuvers like straight-line backing, offset backing, and docking on a closed course. The on-road driving exam puts you in live traffic to evaluate lane changes, turns, interstate merging, and general handling. You must pass all three.

Idaho uses third-party certified examiners rather than DMV employees for skills testing. You schedule and pay the examiner directly, and fees typically run around $180.⁸ ITD publishes a list of certified examiners by region. After you pass, the examiner gives you a signed results form that you bring back to the county office.

At the county office, you pay the licensing fee and the CDL is issued. The fee depends on your age and the term:⁹

4-year license, age 21 and older: $40
8-year license, age 21 to 63: $60
3-year license, age 18 to 21: $30
1-year license, age 20: $15

The county office issues a temporary paper license on the spot, and the permanent card arrives by mail.

License Classes and Endorsements

Idaho CDL classes are defined in Idaho Code § 49-105 by vehicle weight and passenger capacity:¹⁰

Class A: any combination of vehicles with a gross combination weight rating over 26,000 pounds where the towed vehicle exceeds 10,000 pounds. Covers tractor-trailers, flatbeds pulling heavy loads, and most livestock haulers. A Class A also lets you drive Class B, C, and D vehicles.
Class B: any single vehicle over 26,000 pounds, or a vehicle of that size towing something 10,000 pounds or less. Dump trucks, large buses, and concrete mixers. A Class B also covers Class C and D.
Class C: vehicles that do not meet Class A or B weight thresholds but are designed to carry 16 or more people including the driver, or any size vehicle hauling placarded hazardous materials.

Endorsements expand what you can legally haul or operate. Each requires an additional written knowledge test, and some add a skills test:⁵

Tanker (N): written test only. Required for tank vehicles.
Doubles/Triples (T): written test only. Required for pulling double or triple trailers.
Passenger (P): written test and skills test. Required for vehicles carrying 16 or more passengers.
School Bus (S): written test and skills test in a school bus.
Hazardous Materials (H): written test plus a TSA background check with fingerprinting. The TSA threat assessment fee is $85.25. The endorsement must be renewed at every license renewal, and the background check must be repeated each time.¹¹¹

A combined Hazmat/Tanker endorsement (X) is also available and is common for fuel delivery drivers.

Keeping the License Current

Idaho CDL holders without a hazmat endorsement may be eligible to renew online through the ITD website. If you carry a hazmat endorsement, the TSA background check and fingerprinting must be redone, so an in-person visit is unavoidable. Your medical certificate must be current at the time of renewal; if it has lapsed, you will need a new DOT physical before the state processes the renewal. After June 23, 2025, medical certificates must be submitted electronically by the medical provider rather than carried in on paper.¹ Keep your address current with the state so renewal notices actually reach you.

1
Idaho Transportation Department. Commercial Driver’s License
2
Federal Motor Carrier Safety Administration. National Registry of Certified Medical Examiners
3
Federal Motor Carrier Safety Administration. How Do I Determine Which of the 4 Categories of Commercial Motor Vehicle Operation I Should Self-Certify To
4
Federal Motor Carrier Safety Administration. Find a Provider – Training Provider Registry
5
Idaho State Legislature. Idaho Code 49-313 – Examination of Applicants
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Idaho Transportation Department. Ten Steps to Getting an Idaho CDL
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eCFR. 49 CFR 383.25 – Commercial Learners Permit
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Idaho Transportation Department. CDL Examiners
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Idaho State Legislature. Idaho Code 49-306 – Application for Drivers License, Instruction Permit, Commercial Learners Permit or Restricted School Attendance Driving Permit
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Idaho State Legislature. Idaho Code 49-105 – Definitions – D
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Transportation Security Administration. HAZMAT Endorsement