Summary
If you make $642,348 a year living in the region of Nunavut, Canada, you will be taxed $260,198. That means that your net pay will be $382,150 per year, or $31,846 per month. Your average tax rate is 40.5% and your marginal tax rate is 44.5%. 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 $44.50, hence, your net pay will only increase by $55.50.
Bonus Example
A $1,000 bonus will generate an extra $555 of net incomes. A $5,000 bonus will generate an extra $2,775 of net incomes.