Do I need to reactivate my SIN for my second year?
Update your SIN expiry date when you activate your second permit.
Yes. When you activate your second work permit, go to a Service Canada office to reactivate your Social Insurance Number (SIN).
It's a pretty simple process. Your number stays the same, but your SIN needs a new expiry date that lines up with your new work permit.
Find a Service Canada office near you.