Getting Your Social Insurance Number in Canada: What Australians Need to Know

The Social Insurance Number - or SIN - is one of the first things you need to sort after arriving in Canada. It’s a nine-digit number issued by Service Canada that identifies you for employment, tax, and government benefits purposes. Think of it as the Canadian equivalent of your Australian Tax File Number.

Who can get a SIN?

You can apply for a SIN if you have a valid work permit, a study permit with authorisation to work, permanent resident status, or Canadian citizenship. Visitor visas do not grant eligibility.

If you’re in Canada on an IEC (International Experience Canada) working holiday visa, you are eligible and should apply immediately on arrival.

How to apply

There are two ways to get your SIN:

In person at a Service Canada centre

The fastest option. You attend a Service Canada location, present your documents, and receive your SIN the same day in most cases.

What to bring:

• Your passport
• Your open work permit or other authorisation document (your IEC letter of introduction or work permit)
• Proof of your Canadian address (a lease, utility bill, or bank statement - though this is not always required)

Locate your nearest Service Canada centre at servicecanada.gc.ca. No appointment is needed at most locations, though some have reduced walk-in hours.

Online application

Service Canada launched online SIN applications for eligible newcomers. The process involves uploading your documents digitally and your SIN is delivered by mail within approximately five business days.

The online process is convenient but slower. If you need your SIN urgently (for example, to start a job within days of arrival), go in person.

What your SIN looks like and how to protect it

Your SIN is a nine-digit number. You receive it either as a confirmation letter (newer) or on a plastic SIN card (older format - no longer issued, but still valid if you have one).

Your SIN is sensitive information. Treat it the same way you’d treat your passport number or bank account details. Only provide it to:

• Your employer (legally required for payroll and tax purposes)
• Your bank (for registered accounts like RRSP and TFSA)
• The CRA (Canada Revenue Agency) for tax filing
• Government agencies when applying for benefits

Temporary vs. permanent SINs

If you’re in Canada on a temporary visa (including a working holiday), your SIN will begin with the number 9. This is a temporary SIN and it has an expiry date tied to your visa.

When your visa expires or is renewed, you need to update your SIN record with the new expiry date. You do this at a Service Canada centre with your new permit. Failing to update can cause issues with employment and tax filing.

If you later become a permanent resident or citizen, you can apply for a permanent SIN (starting with a different digit) at that point.

What to do with your SIN once you have it

Once you have your SIN, a few immediate actions:

1. 1

   Give it to your employer

   They need it before your first payslip to set up payroll correctly — and they're legally required to request it.

2. 2

   Provide it to your bank

   You'll need it to open a TFSA (Tax-Free Savings Account) or RRSP. Your bank will ask at account opening or when you add these products.

3. 3

   Keep it off unnecessary paperwork

   Many forms ask for it when they don't need to. You're only legally required to give your SIN to employers and the CRA — if a landlord, retailer or non-government service asks, you can decline.

4. 4

   Register with the CRA

   Once you have a SIN and have filed your first tax return, create a My Account with the Canada Revenue Agency for access to your tax history, benefit payments and RRSP room.

The TFSA - open one early

Once you have your SIN and a bank account, open a Tax-Free Savings Account (TFSA) as soon as possible. This is one of the best financial tools available in Canada.

A TFSA lets you invest or save money and all growth, interest, and withdrawals are completely tax-free. The contribution room accumulates from the year you turn 18 and become a Canadian resident - as a newcomer, your room starts accumulating from the year you arrive.

For 2025, the annual TFSA contribution limit is $7,000. If you arrived in Canada in a previous year, your unused room carries forward.

The bottom line

Go to a Service Canada centre within your first week in Canada and get your SIN. Bring your passport and work permit. It takes less than thirty minutes. Everything else - employment, banking, taxes, government benefits - depends on having it.

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