Summary
If you make $51,240 a year living in the region of Ontario, Canada, you will be taxed $13,775. That means that your net pay will be $37,465 per year, or $3,122 per month. Your average tax rate is 26.9% and your marginal tax rate is 35.3%. 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 $35.26, hence, your net pay will only increase by $64.74.
Bonus Example
A $1,000 bonus will generate an extra $647 of net incomes. A $5,000 bonus will generate an extra $3,237 of net incomes.