SIN Number and Banking in Canada (2026)
Your Social Insurance Number (SIN) is one of the most important numbers you'll use in Canada — it connects your identity to employment, banking, taxes, and government benefits. For newcomers, understanding when and why banks ask for your SIN (and what to do before you have one) is essential.
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What Is a SIN?
A Social Insurance Number (SIN) is a 9-digit number issued by Service Canada to individuals authorized to work in Canada. It's used by:
- Employers: To deduct income tax, CPP contributions, and EI premiums from your paycheck
- Banks: To report interest income to the Canada Revenue Agency (CRA)
- CRA: To track your tax filings and benefit payments
- Government agencies: For social programs like Employment Insurance, CPP, OAS
Your SIN is highly sensitive — it's the key to your identity in Canada's financial and tax system. Guard it carefully and never share it casually.
Who Gets a SIN?
- Canadian citizens: Permanent SIN (starts with 1-8)
- Permanent residents: Permanent SIN (starts with 1-8)
- Temporary residents (work/study permits): Temporary SIN (starts with 9), valid until permit expires
- Refugee claimants: Temporary SIN with work authorization
- Visitors: Cannot get a SIN unless authorized to work in Canada
Do You Need a SIN to Open a Bank Account?
Most major Canadian banks require a SIN to open a full bank account. However, there are nuances:
- KOHO: Does NOT require a SIN to open — you can open with just a passport
- TD, RBC, Scotiabank, BMO, CIBC: Require SIN for full accounts, but may open a temporary account for 30-90 days while you wait for your SIN
- Why banks need your SIN: Canadian law (Income Tax Act) requires banks to collect your SIN for any account that earns interest, so they can report the income to CRA
- Non-interest accounts: Technically, banks don't need your SIN for accounts that earn no interest, but most banks require it as standard policy anyway
How to Apply for a SIN
1
In-person (fastest): Walk into a Service Canada Centre with your immigration documents. You receive your SIN the same day. No appointment needed at most locations.
2
Online: Available for PR holders via the Service Canada website. Processing takes 5-10 business days. You receive a "confirmation of SIN" letter, then the physical card separately.
3
By mail: Send certified copies of your immigration documents and application form. Takes 2-3 weeks.
Documents Needed for SIN Application
- Permanent Residents: PR card, COPR (Confirmation of Permanent Residence), or Record of Landing (IMM 1000)
- Work permit holders: Work permit AND passport
- Study permit holders: Study permit AND proof of enrollment from your school AND passport
- Refugee claimants: ARC card (IMM 1442) or work permit
Priority Action: Apply for your SIN within the first few days of arriving in Canada. Most Service Canada Centres process same-day applications. Getting your SIN unlocks banking, employment, and government benefits — don't delay.
When Must You Provide Your SIN to a Bank?
Banks legally must collect your SIN under these circumstances:
- Opening any interest-bearing account (savings accounts, GICs, etc.)
- Opening an RRSP, TFSA, or other registered account
- Applying for a mortgage or loan
- When you've been given a 30-90 day grace period and your SIN has now arrived
You are legally required to provide your SIN to a bank once you have one. Refusing to provide your SIN after receiving it is not permitted.
Protect Your SIN: Your SIN should only be given to: employers, banks, Canada Revenue Agency, and federal government programs. Do not give your SIN to landlords, stores, insurance companies, or anyone else who asks for it without legal reason. If someone asks for your SIN and you're not sure they need it, ask why — you have the right to know.
SIN and Credit Score — The Connection
Your SIN is used when applying for credit products (credit cards, loans). Lenders use your SIN to pull your credit report from Equifax or TransUnion. As a newcomer with no Canadian credit history, you'll have no credit file associated with your SIN initially — that's why you need to start building credit.
KOHO's credit building feature works by reporting to Equifax under your SIN. Once you add your SIN to your KOHO account, your credit history starts building.
What Happens If Your SIN Expires (Temporary SIN)
If you have a temporary work or study permit, your SIN starts with "9" and has an expiry date matching your permit. When your permit is renewed or you get PR status:
- Apply for an updated SIN (or new SIN if you get PR) at Service Canada
- Update your SIN with your bank and employer
- Your credit history stays associated with your account — it doesn't reset
Related Guides
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