A study permit is valid for a specific period, and most students who haven't finished their program by the time it expires need to apply for an extension before that date. Getting the timing right matters more than most students realize.
Maintained status
If you apply to extend your study permit before your current one expires, you generally benefit from what's known as maintained status (sometimes called implied status): you can continue studying under the terms of your expired permit while your extension application is being processed, even if a decision comes after the original expiry date. If you let your permit expire before applying, you lose this protection and may need to stop studying, or leave Canada, until a new permit is issued.
When to start the renewal process
Processing times vary, so applying well before your permit's expiry date — rather than waiting until the last few weeks — gives you the best chance of a smooth transition. Some institutions and immigration offices see seasonal surges in renewal applications around common term-start dates, which can affect processing time.
Staying eligible while your permit is active
Maintaining valid study permit status generally requires staying enrolled at a designated learning institution and actively pursuing your course or program — not just holding a permit passively. A significant, unapproved break from studies, a change to a non-DLI institution, or dropping to part-time study when full-time is required can all put your status at risk, independent of your permit's expiry date.
Changing programs or institutions
Switching institutions or substantially changing your program partway through is not always a simple update — depending on the circumstances, it can affect your permit conditions or require a new application. Any student considering a change should confirm the implications for their status before making the switch, not after.