What's the Passing Score on the Michigan CDL General Knowledge Test?

An 80% threshold on 50 questions means you can miss up to 10 and still pass, but missing more means the test must be retaken — and Michigan allows only one attempt per category per day.

Because the standard is federal (49 CFR Part 383) rather than state-set, the Michigan SOS can't lower or raise it independently.

Since 80% is the minimum and retakes are limited to once per day per category, aim to consistently score 90% or higher across all 17 CDL topic areas before your appointment.

Our practice tests show your score as a percentage immediately after each set, with a topic-by-topic breakdown so you know exactly which rules to review again.

Hours-of-service rules and air brake systems are consistently tough, since they involve specific numeric limits rather than everyday driving intuition.

The FMCSA Clearinghouse requirement and Michigan's 180-day, renewable-once CLP validity window are also common points of confusion, since they're procedural rather than driving-technique questions.

Reviewing the explanation after every practice question, not just the correct answer, is the fastest way to close these gaps.