CDL — Commercial Driver's License in Michigan

Testing agency

Michigan Secretary of State

Written-test languages

English

To pass

80% (each test)

Fee

No standalone CDL knowledge-test fee published; fees collected at SOS office ($5/endorsement group)

Retake policy

1-day wait between attempts; one test per category per day

Languages note

Official: interpreters allowed on all written tests EXCEPT CDL knowledge tests → CDL is English only.

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).