If you make $55,000 a year living in the region of Illinois, USA, you will be taxed $12,018. That means that your net pay will be $42,983 per year, or $3,582 per month. Your average tax rate is 21.9% and your marginal tax rate is 34.6%. 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 $34.60, hence, your net pay will only increase by $65.40.
A $1,000 bonus will generate an extra $654 of net incomes. A $5,000 bonus will generate an extra $3,270 of net incomes.