Regardless the fact that many totorials recommend to modify ~./bashrc in order ot perform a permanent modification of PATH for a given user, this is not a way to go. According to the official Ubuntu StackExchange, the way to go is to use the ~/.pam_environment  folder, which is meant specifically for such modifications.

However, pay attention to the fact that you have to follow the pam_environment-specific synthax and thus type

PATH DEFAULT=${PATH}:/path/to/wherever/your/binaries/are