Social Insurance Number – Apply

4. How to apply

There is no fee to apply for a Social Insurance Number (SIN).

Where to find your SIN

If you don’t remember your SIN, there may be ways you can find it yourself. You can find your SIN in the following places:

  • on your income tax return
  • on your tax slips (T4s, T5)
  • on your record of employment
  • RRSP contribution, or
  • you can request your SIN from your employer

Applying for a SIN

We are still accepting SIN applications but will no longer be accepting them at our in person Service Canada Centers. We recommend that those applying carefully review the following instructions.

You have the option to apply online or by mail.

Apply online

Please consult the online application guide to ensure you have all the required documents ready before you apply.

Apply online for a SIN

Applying by mail

What you need to apply by mail:

  • a completed SIN application form (if you are unable to print the application form, you can order the form by phone at 1-506-548-7961; long distance charges apply)
  • the required original documents

Send your completed application form and original documents (photocopies are not accepted) to:

Service Canada
Social Insurance Registration Office
PO Box 7000
Bathurst NB  E2A 4T1
Canada

If you send your application by registered mail, we will return your document(s) in the same way. Service Canada is not responsible for documents lost in the mail.

If your SIN application meets the requirements, you will receive a letter with your SIN by mail within 20 business days from the date the application is received. If more than 25 business days have passed and you would like to find out the status of your application, contact the SIN program.


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