Summary
If you make $11,960 a year living in the region of Illinois, USA, you will be taxed $1,507. That means that your net pay will be $10,453 per year, or $871 per month. Your average tax rate is 12.6% and your marginal tax rate is 12.9%. 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 $12.90, hence, your net pay will only increase by $87.10.
Bonus Example
A $1,000 bonus will generate an extra $871 of net incomes. A $5,000 bonus will generate an extra $4,355 of net incomes.