Summary
If you make $39,937 a year living in the region of Ontario, Canada, you will be taxed $10,427. That means that your net pay will be $29,510 per year, or $2,459 per month. Your average tax rate is 26.1% and your marginal tax rate is 27.8%. 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 $27.76, hence, your net pay will only increase by $72.24.
Bonus Example
A $1,000 bonus will generate an extra $722 of net incomes. A $5,000 bonus will generate an extra $3,612 of net incomes.