Summary
If you make $18,623 a year living in the region of Illinois, USA, you will be taxed $2,914. That means that your net pay will be $15,709 per year, or $1,309 per month. Your average tax rate is 15.7% and your marginal tax rate is 22.6%. 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 $22.60, hence, your net pay will only increase by $77.40.
Bonus Example
A $1,000 bonus will generate an extra $774 of net incomes. A $5,000 bonus will generate an extra $3,870 of net incomes.