If you make $12,500 a year living in the region of Arizona, USA, you will be taxed $1,316. That means that your net pay will be $11,184 per year, or $932 per month. Your average tax rate is 10.5% and your marginal tax rate is 14.9%. 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 $14.85, hence, your net pay will only increase by $85.15.
A $1,000 bonus will generate an extra $852 of net incomes. A $5,000 bonus will generate an extra $4,258 of net incomes.