A transfer is a temporary transit voucher given to passengers who pay their fare in cash or with a ticket. It entitles a passenger to board more than one STM vehicle in order to complete a trip. However, it does not allow its holder to carry out a return trip or temporarily interrupt their trip to resume it later on the same bus route. Furthermore, transit users cannot re-enter the métro with a métro transfer.

A transfer is valid for 90 minutes from the moment it is issued; the time printed indicates when it expires. Ask the driver for a transfer when boarding the bus, or take one from the transfer dispensing machines located just after the turnstiles in the métro.