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CDL — Commercial Driver's License in Missouri
Missouri Dept. of Revenue (exam by MO State Highway Patrol)
📋 Exam facts
Real Missouri exam administration — from the official source
- Practice questions (this site)
- 1281
- Testing agency
- Missouri Dept. of Revenue
- Real written-test languages
- English
- To pass
- 80% (25 questions; may miss up to 5)
- Fee
- $25 written exam fee (part of the $44 CLP fee)
- Retake policy
- Up to 2 attempts per day until you pass
- Languages note
- Official: CDL written test administered in English only; no translators allowed. (DOR issues the license; MSHP administers the exam.)
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🚌 School Bus (S) — additional Missouri requirements
Beyond the federal CDL School Bus knowledge + skills test, this state adds its own school-bus driver credential. (Practice here covers the knowledge test only.)
- Administering agency
- Missouri DESE, with the Department of Revenue (DOR)
- State credential
- Missouri requires a CDL with passenger and school-bus (S) endorsements for buses 26,000 lbs or more, or a Class E license with the (S) endorsement for buses under 26,000 lbs; the S endorsement requires passing a knowledge test and a skills test in a school bus.
- Renewal / in-service
- Each school district must provide at least 8 hours of training annually to every school bus driver; drivers must have a physical examination biennially.
- Other prerequisites
- Pass the school-bus knowledge and skills tests for the (S) endorsement; have a medical examiner's statement on file showing physical qualification to operate a school bus (the physical can be done by anyone licensed in Missouri to perform physical examinations).
Languages, fees and rules change — confirm with the official source linked for each state. 待核 / 'To confirm' = not yet confirmed from an official source (shown honestly, never guessed). The 2025 federal English-Language-Proficiency action is roadside out-of-service enforcement, not a state test-language mandate; states set their own written-test languages (Texas and Florida moved to English-only in 2026).