Can an intra-company transfer be renewed indefinitely if the Canadian office keeps growing?

No, generally not — an intra-company transfer is not renewed indefinitely just because the Canadian office continues to grow. Each renewal application is treated as a fresh eligibility assessment against the applicable category's own maximum-stay structure, whether that is the specialized knowledge category or the executive/managerial category, and the growth or success of the Canadian office does not by itself extend that structural limit.

The nuance that surprises people is that strong business results can work against the assumption of easy renewal in a subtle way — a company that has grown significantly may need to show the transferee's specific role still genuinely fits the category originally used, since roles can shift as a company matures, and what qualified someone initially may no longer describe their current position accurately. Each renewal also means resubmitting current evidence about the qualifying relationship between the companies, the Canadian office's operations, and the transferee's actual duties, rather than treating a prior approval as proof later renewals will automatically follow. As someone approaches that category's structural maximum-stay point, it is worth considering other options, such as a different work permit category or a permanent residence pathway, well in advance. Because renewal outcomes depend on the specific facts at the time of each application, anyone approaching a renewal should plan ahead with an immigration lawyer.