Box 12 - Social insurance number
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Box 12 - Social insurance number
Enter the employee’s SIN, as provided by the employee.
Notes
If your employee had a SIN beginning with a nine (9) and later in the year received a permanent SIN, use the permanent SIN in box 12. Do not prepare two T4 slips.
If you do not have the employee's SIN, enter nine zeros. For more information about social insurance numbers, go to Social insurance number (SIN).
Make sure the SIN you enter on the T4 slip for each employee is correct. An incorrect SIN can affect an employee’s Canada Pension Plan or Quebec Pension Plan benefits if the record of earnings file is not accurate. Also, if the T4 slip has a pension adjustment amount, the employee may receive an inaccurate annual RRSP deduction limit statement and the related information on the employee’s notice of assessment will be inaccurate.
For more information about social insurance numbers and information slips, go to Failure to obtain your employee's social insurance number (SIN), Information Circular 82-2, Social Insurance Number Legislation that Relates to the Preparation of Information Slips or visit Service Canada.
- Date modified:
- 2015-12-17