Summary
If you make $120,171 a year living in the region of Alberta, Canada, you will be taxed $38,126. That means that your net pay will be $82,045 per year, or $6,837 per month. Your average tax rate is 31.7% and your marginal tax rate is 36.0%. This marginal tax rate means that your immediate additional income will be taxed at this rate. For instance, an increase of $100 in your salary will be taxed $36, hence, your net pay will only increase by $64.
Bonus Example
A $1,000 bonus will generate an extra $640 of net incomes. A $5,000 bonus will generate an extra $3,200 of net incomes.