Idaho CDL Written Test — Questions, Cost & Study Tips (2026)

Studying for your Idaho CDL written exam? Here is what applicants typically need to know before visiting Idaho DMV.

How many questions on the Idaho CDL test?

Idaho general knowledge written exams commonly include about 50 multiple-choice questions for the core CDL knowledge test. Endorsements such as air brakes, combination vehicles, hazmat, and passenger are separate written tests if your license class requires them.

PassCDL mirrors this structure: start with general knowledge, then add endorsement practice for the tests you need.

Idaho CDL test cost (approximate)

Written exam fees at Idaho DMV are typically $20–$30 per attempt (varies by office and endorsement). Failing and retesting can cost more than a month of PassCDL Pro — many students prefer unlimited practice before test day.

Idaho study tip

Idaho Transportation Department CDL written tests follow the federal CDL manual with state-specific procedures.

Free ID CDL practice test

Use our Idaho CDL practice test for scored questions and explanations. PassCDL Pro adds full exam simulations, all endorsements, and unlimited retakes.

See also: How many questions on the CDL test? · CDL general knowledge study guide

Educational practice only — not affiliated with Idaho DMV or any state DMV.