Summary
If you make $378,278 a year living in the region of Alberta, Canada, you will be taxed $153,485. That means that your net pay will be $224,793 per year, or $18,733 per month. Your average tax rate is 40.6% and your marginal tax rate is 47.9%. 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 $47.85, hence, your net pay will only increase by $52.15.
Bonus Example
A $1,000 bonus will generate an extra $522 of net incomes. A $5,000 bonus will generate an extra $2,608 of net incomes.