Yes, you can apply to extend your Canada Work Visa before it expires. It is recommended to apply at least 30 days in advance, although applications can be submitted up to the last day of validity. Extension applications are submitted online through IRCC and require updated documents such as a new job offer or proof of continued employment. While awaiting a decision, you may be allowed to continue working under implied status if your current permit expires. Approval depends on meeting eligibility criteria and maintaining legal status.