Summary
If you make $18,031 a year living in the region of Ontario, Canada, you will be taxed $4,312. That means that your net pay will be $13,719 per year, or $1,143 per month. Your average tax rate is 23.9% and your marginal tax rate is 25.9%. 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 $25.87, hence, your net pay will only increase by $74.13.
Bonus Example
A $1,000 bonus will generate an extra $741 of net incomes. A $5,000 bonus will generate an extra $3,707 of net incomes.