Yes, if you let your commercial licence expire you will have to pay the appropriate fee for your licence as well as any fees applicable for additional testing.
Expired Commercial Licences
The expiry date of your commercial licence is printed on your licence photocard. In addition, you will usually get a renewal reminder from the Ministry of Transportation in the mail. However, it is solely your responsibility to make sure your licence is up-to-date.
If your licence has been expired for this long that means that your Class G licence will also be expired. You will have to reapply for and obtain your Class G licence, then reapply for your commercial licence and pass all necessary vision, written, practical and criminal record tests relevant to the class of commercial …
You must visit a DriveTest Centre and take a vision test and a written knowledge test. You may be asked to take a road/practical test although this is generally not required. You must also submit a satisfactory medical examination report.