CDL Test Passing Score

The minimum score you need to pass each CDL written exam

The passing score for every CDL written test is 80%. This is a federal standard set by the FMCSA (Federal Motor Carrier Safety Administration) and applies in all 50 states.

How Many Can You Miss?

Is 80% Hard to Achieve?

80% is achievable with proper preparation. The questions are based directly on the CDL manual, and many are straightforward if you've studied the material. The most commonly failed tests are:

• General Knowledge — the largest test with the broadest material
• Air Brakes — technical questions about brake system components
• HAZMAT — requires memorizing placard numbers and hazard classes

What Happens If You Fail?

If you score below 80%, you can retake the test. Each state has its own retake policy:

• Waiting period: Most states require 1 to 7 days between attempts
• Retake fee: Usually $10-$25 per attempt
• Attempt limit: Most states allow unlimited retakes, but some limit to 3 attempts before requiring a longer wait (30-90 days)

Tips to Score Above 80%

1. Take practice tests until you consistently score 90%+
2. Focus on your weak areas — review missed questions and their explanations
3. Read the CDL manual for your state at least once
4. Don't rush — you have plenty of time on the real exam
5. Answer every question — there's no penalty for guessing