An employee who lives in Ontario and reports to work at a permanent establishment of...

For payroll deductions, the key concept is the employee’s province of employment (POE)—not where they live. The CRA states that the POE is determined primarily by the employer’s establishment where the employee “reports for work.” If an employee reports for work at an employer’s establishment located in Quebec, then the POE is Quebec, even if the employee’s province of residence is Ontario.

This matters because Quebec has distinct payroll requirements. The CRA notes that when the POE is Quebec, employers must apply Quebec-based payroll rules, including deducting Québec Pension Plan (QPP) contributions instead of CPP, and deducting Québec parental insurance plan (QPIP) premiums, along with Quebec provincial income tax withholding.

In practice, payroll must set up the employee using Quebec as the POE and ensure stakeholders (HR, finance, the employee) understand why deductions may differ from Ontario residents working in Ontario. Any over/under-withholding due to POE vs. residence is typically reconciled when the employee files their personal tax return.