Summary
If you make $21,164 a year living in the region of Arizona, USA, you will be taxed $3,020. That means that your net pay will be $18,144 per year, or $1,512 per month. Your average tax rate is 14.3% and your marginal tax rate is 21.1%. 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 $21.06, hence, your net pay will only increase by $78.94.
Bonus Example
A $1,000 bonus will generate an extra $789 of net incomes. A $5,000 bonus will generate an extra $3,947 of net incomes.