Easy roam activation 18/day for recieving multi authentications codes ?

Hi everyone, 

I will be in Australia for the next 3 months. To log into my bank and other services similar I need to use multi authentication to access these. Frequently I am asked to enter the code sent to my canadian phone number. If I have my homeline turned on but roaming turned off, and i’m only recieving multi authenticator codes, will I still be charged the $18/day for easy roam whilst abroad?