You must apply before your work permit in Canada expires or within 90 days of losing your temporary resident status in Canada. When you are applying for a work permit renewal, make sure you are still admissible and that you still meet the requirements upon which you were granted your authorization to work in Canada. For example, it may be a requirement that you are working for the same employer. Apply as early as possible. You can send your application for renewal online or by mail together with documents such as your passport, current work permit, and job offer. A renewal fee of $155 CAD applies, plus an additional $85 CAD for biometrics if needed.
How to Renew an Expired Work Permit in Canada | Oasis India (oasis-india.com)