A bonus paid for work in British Columbia is employment income. Enter your salary and bonus to see the estimated incremental tax and payroll contributions — not a flat bonus tax rate.
In British Columbia, a bonus is added to the same employment income used for federal tax, provincial or territorial tax, CPP, and EI. If you are already at the CPP or EI maximum, the extra deductions are mostly income tax.
Payroll software may treat a bonus as a lump-sum or extra-period payment. The amount withheld on the cheque can be higher or lower than this annual estimate. The year-end T4 / Relevé 1 is what matters for your actual tax.
For annual tax, no — it is employment income. Withholding on the bonus payment itself can still look different from regular paycheques.
Net bonus is estimated take-home on salary plus bonus minus estimated take-home on salary alone.
Only if you have not already reached the annual maximums. High earners who have already maxed CPP/QPP and EI should see mostly income tax on the extra amount. Quebec also uses QPIP.
Employers withhold using payroll formulas that can differ from the final annual tax on the combined income. This page estimates the annual incremental effect.