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

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

How many questions on the Missouri CDL test?

Missouri 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.

Missouri CDL test cost (approximate)

Written exam fees at Missouri DOR are typically $20–$35 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.

Missouri study tip

Missouri DOR CDL applicants pass written tests before the skills exam — air brakes if equipped.

Free MO CDL practice test

Use our Missouri 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 Missouri DOR or any state DMV.