Can an out-of-province professional incorporate a professional corporation in Ontario?

Generally, incorporating an Ontario professional corporation requires the licensed shareholder to hold the appropriate licence to practise that profession in Ontario specifically — being licensed and incorporated in another province usually isn't enough on its own. The professional corporation regime is built around the Ontario governing body's authority to issue a certificate of authorization, and that body's rules typically require the professional behind the corporation to be one of its own licensees in good standing.

For a professional moving to Ontario or looking to practise here alongside their home-province credentials, the practical path is usually to first obtain the necessary Ontario licence or registration with the relevant governing body (which may involve its own transfer or reciprocity process), and only then incorporate the Ontario professional corporation and apply for its certificate of authorization. Some professionals mistakenly try to incorporate first, assuming the corporate paperwork is the hard part — in practice, it's usually the licensing step that takes the real planning. Confirm your specific governing body's requirements before starting either process.