Social Insurance Number
SIN
A unique nine-digit number required to work in Canada, access government programs, and file taxes.
What is a SIN?
A Social Insurance Number (SIN) is a unique nine-digit number issued by Service Canada. It is required to work in Canada, access government programs and benefits, and file your income tax return. Every person who works or receives taxable income in Canada needs a SIN.
Why It Matters for Newcomers
Getting your SIN is one of the first and most important tasks after arriving in Canada. You cannot legally start working without one, and your employer needs it for payroll and tax purposes. It is also needed to open certain bank accounts and access benefits like the Canada Child Benefit.
How to Get Your SIN
You can apply for a SIN in person at a Service Canada office or online through the Service Canada website. You need your primary identity document (such as your COPR, work permit, or study permit) and your passport. There is no fee, and when applying in person, you receive your SIN the same day.
Quick Tip
Your SIN is a confidential number. Never carry your SIN card in your wallet and only share it when absolutely required, such as with your employer, bank, or the CRA. Identity theft involving SIN misuse is a real risk in Canada.