What should you do after receiving your SIN in Canada?
Short answer: Give your SIN to your employer within 3 days, open or upgrade your bank account (required for credit cards, lines of credit, RRSPs, TFSAs, RESPs), and register for My Service Canada Account (MSCA) to check your SIN, update your address, and view tax slips.
Once you have the number, three things to do in your first week.
Give your employer the SIN. Federal law requires the employer to record it within three days of your start date. They will ask you to fill out a TD1 federal form and a provincial TD1 form, and the SIN lets them set up payroll deductions and Canada Revenue Agency (CRA) reporting on your behalf.
Open or upgrade your bank account. Most Canadian banks ask for a SIN when you open anything beyond a basic chequing account. You also need a SIN to apply for a credit card, a line of credit, or any registered investment account (RRSP, TFSA, RESP).
Then register for My Service Canada Account (MSCA) at canada.ca/my-service-canada-account. The account lets you check your SIN, update your address, view tax slips that Service Canada has issued, and request a SIN confirmation letter at any time.
What do you do if your SIN is lost or stolen?
Short answer: No replacement SINs since 2014; find your number on a previous T4, T5, tax return, or in your MSCA account, or request a free SIN confirmation letter at any Service Canada Centre; if identity theft is suspected, place fraud alerts with Equifax and TransUnion and report to the Canadian Anti-Fraud Centre.
If you lose the paper confirmation letter or someone steals it, you do not need a new SIN. Service Canada has not issued replacement SINs since 2014. The SIN itself stays with you for life. Only the paper letter is lost.
To recover the number:
- Look on a previous T4 slip, T5 slip, or tax return. Your SIN is on all of them.
- Log into your MSCA account if you set one up.
- Request a SIN confirmation letter at a Service Canada Centre (free) or online via your MSCA account.
If you suspect identity theft, contact Equifax and TransUnion to place a fraud alert on your credit file, and report the incident to your local police and to the Canadian Anti-Fraud Centre. Service Canada can flag your SIN file for unusual activity but will only issue a new SIN if your old one is confirmed compromised by criminal investigation. This is rare.
What common SIN mistakes do newcomers make?
Short answer: Never put a SIN on a resume; banks, CRA, and Service Canada never email or text asking for it; update Service Canada within weeks of any permit renewal; ensure document scans have no glare or cropping; and remember each child of a permanent resident needs their own SIN to claim CCB or RESP.
Never put a SIN on a resume. No employer is allowed to ask for your SIN until they have made a written job offer that you have accepted. Putting it on a resume creates an identity-theft risk and signals you are unfamiliar with Canadian hiring norms.
Banks, the CRA, and Service Canada will never email or text for your SIN. Scammers do. If you get a call, email, or message asking for your SIN, hang up or delete and contact the agency directly using the phone number listed on canada.ca.
After a permit renewal, update Service Canada within a few weeks. This is the most common cause of pay interruption for work-permit holders in Canada. The fix is fast. Forgetting is expensive.
Bad document scans tank online applications. Glare, cropped edges, low resolution. Service Canada rejects roughly a quarter of online applications for image quality alone. If your phone camera is unreliable, go in person.
Children of permanent residents need their own SIN. Parents claim the Canada Child Benefit, set up a Registered Education Savings Plan, and list children as dependents on a tax return only when each child has a SIN of their own. A parent or guardian can apply on behalf of any child under 12.
What else do newcomers ask about SIN numbers in Canada?
Here are the questions Service Canada agents and immigration consultants hear most from new arrivals. The answers reflect the rules in effect for 2026; if your situation involves an expired permit, an implied-status period, or a recent PR transition, the relevant sections above cover those steps.
How much does it cost to get a SIN in Canada?
Free. There is no fee for applying online, in person, or by mail. Anyone charging you for SIN assistance is running a scam.
How long does it take to get a SIN at a Service Canada Centre?
If you walk in with the right original documents and the wait at that centre is normal, you leave with your SIN the same hour. The actual transaction takes under 15 minutes once your number is called.
Can I work in Canada without a SIN?
Not legally. Federal law requires employees to provide a SIN to their employer within three days of starting a job. Some employers will pay an employee for up to three days while the SIN application is in progress, but they cannot continue past that without one.
Does my SIN change when I become a permanent resident?
Yes. If you originally received a temporary 9xx SIN as a work or study permit holder, becoming a permanent resident triggers a new SIN that starts with one of 1 through 7 and has no expiry. The old 9xx SIN is retired. You should apply for the new SIN at Service Canada within a few weeks of receiving your PR card or COPR.
What if I have a SIN from a prior stay in Canada?
You keep it. SINs are issued for life. If you had a 9xx SIN from a previous work permit and you are returning on a new work permit, you do not get a new SIN; you reactivate the old one with the new expiry date. Bring your prior SIN confirmation letter or the number itself, plus your new IRCC document, to Service Canada.
Where do I go for help if Service Canada rejects my SIN application?
The Service Canada general inquiry line is 1-866-274-6627. If your document was rejected for a technical reason (image quality, document type), the rejection email usually explains how to correct it. If your SIN application is rejected for a status reason (Service Canada says your IRCC document does not qualify), book a consultation with a regulated immigration consultant before you respond. Sometimes the rejection is a Service Canada error. Other times it is a sign of an IRCC issue with your file.
If you need help renewing your work permit before your SIN expires, or you are uncertain whether your specific IRCC document qualifies you for a SIN, book a consultation with Go Far Global. Our RCIC-licensed team handles the document review and the timing strategy so you do not lose a single pay cycle.
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