Testing and fees are required to add endorsements or remove restrictions from your commercial driver’s license (CDL). 

To upgrade your driver’s license with an endorsement, you must pass a written test for each endorsement. 

To renew a hazmat or school bus endorsement, you need to retake the written test. Other endorsements do not require a written test on renewal. 

To add endorsements to an existing CDL, you must pass the appropriate tests and apply for a duplicate license. 
 
Adding school bus or passenger endorsements requires a road test in an appropriate vehicle. 
 
You have 30 days after becoming a Minnesota resident to transfer your CDL from another state. 

• Examination fee for each endorsement: $2.50 
• School Bus physical processing fee- original and renewal application: $4 
• Retesting fee the third and subsequent written test (after failing first two): $10 
• Retesting fee the third and subsequent road test (after failing first two): $20

E = not valid for commercial motor vehicles (CMVs) manual transmission 

K = intrastate only 

L = not valid for CMV’s with air brakes 

M = not valid for class A passenger bus 

N = not valid for buses over 26,000 GVWR  

O = not valid for tractor semi-trailer 

P = no passenger in CMV bus (CLP) 

V = FMCSA waiver 

W = buses less than 24 passenger capacity 

X = no cargo in CMV tank vehicle (CLP) 

Z = air over hydraulic brake system only