• Updated Oct 24, 2026: Exam fee (Hazmat endorsement (TSA threat assessment)) is now $88.25 (previously $85.25).
• Updated Oct 24, 2026: Exam fee (Hazmat endorsement, TWIC holder) is now $41.00 reduced rate (previously $41.00 reduced rate).

Facts verified Oct 24, 2026 against U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th. Dates that have passed are removed automatically.

• To pass each CDL knowledge test, a driver applicant must correctly answer at least 80 percent of the questions. (U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th)
• The TSA security threat assessment fee for a new or renewing hazmat endorsement (HME) applicant is $88.25, effective January 1, 2025. (tsa.gov)
• The TSA hazmat endorsement threat assessment fee is reduced to $41.00 for applicants who already hold a valid TWIC. (tsa.gov)
• A state must use a different version of the CDL knowledge test when an applicant retakes a previously failed test. (U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th)
• A commercial learner's permit is valid for no more than one year from the initial date of issuance without retaking the general and endorsement knowledge tests. (U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th)
• A hazmat endorsement (HME) generally must be renewed every five years, with new fingerprints required at renewal. (tsa.gov)
• CDL knowledge tests may be administered in written form, verbally, or in automated format, and in a foreign language provided no interpreter is used. (U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th)

Facts verified Oct 24, 2026 against U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th. Dates that have passed are removed automatically.