If you make $30,000 a year living in the region of Arizona, USA, you will be taxed $5,000. That means that your net pay will be $25,000 per year, or $2,083 per month. Your average tax rate is 16.7% and your marginal tax rate is 22.4%. 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 $22.35, hence, your net pay will only increase by $77.65.
A $1,000 bonus will generate an extra $777 of net incomes. A $5,000 bonus will generate an extra $3,883 of net incomes.