If you make $180,000 a year living in the region of Ontario, Canada, you will be taxed $65,891. That means that your net pay will be $114,109 per year, or $9,509 per month. Your average tax rate is 36.6% and your marginal tax rate is 48.0%. 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 $47.97, hence, your net pay will only increase by $52.03.
A $1,000 bonus will generate an extra $520 of net incomes. A $5,000 bonus will generate an extra $2,602 of net incomes.