If you make $20,000 a year living in the region of Ontario, Canada, you will be taxed $4,822. That means that your net pay will be $15,178 per year, or $1,265 per month. Your average tax rate is 24.1% and your marginal tax rate is 31.9%. 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 $31.87, hence, your net pay will only increase by $68.13.
A $1,000 bonus will generate an extra $681 of net incomes. A $5,000 bonus will generate an extra $3,407 of net incomes.