Social insurance number 900 series
A 900-series social insurance number is one that starts with 9. Service Canada says SINs issued to temporary residents always start with 9, and the SIN expires on the same date as the person’s work permit, study permit or visitor record.
A buyer or seller verifying a temporary worker’s SIN sees this number in payroll records. Service Canada issues SINs beginning with 9 to temporary residents, so such a SIN is a prompt to look at the worker’s immigration document.
What the sources say
The Employment and Social Development Canada employer page says SINs beginning with 9 are issued to temporary workers who are neither Canadian citizens nor permanent residents, and asks employers to ensure those employees are authorized to work and that their immigration document has not expired. The CRA says such numbers are valid only until the expiry date shown on the IRCC document. Service Canada adds that a person who applied to extend a permit (maintained status) can keep working with an expired SIN until IRCC decides.
What to check
- Which payroll records show a SIN starting with 9
- The expiry date and the matching permit for each
- Whether any permit is expiring, which links to bridging open work permits
Add the result to your employment records review.
Sources
This definition is checked against primary sources. Links were last confirmed on the dates shown.
- 01Employment and Social Development Canada (Service Canada)GovernmentSIN for temporary residents in Canada
- 02Employment and Social Development CanadaGovernmentEmployer information - Social Insurance Number (SIN)
- 03Canada Revenue AgencyGovernmentGet the social insurance number (SIN) from the individual
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