Summary
If you make $299,983 a year living in the region of Ontario, Canada, you will be taxed $127,976. That means that your net pay will be $172,007 per year, or $14,334 per month. Your average tax rate is 42.7% and your marginal tax rate is 53.4%. 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 $53.35, hence, your net pay will only increase by $46.65.
Bonus Example
A $1,000 bonus will generate an extra $467 of net incomes. A $5,000 bonus will generate an extra $2,333 of net incomes.