If you make $128,000 a year living in the region of Arizona, USA, you will be taxed $34,977. That means that your net pay will be $93,023 per year, or $7,752 per month. Your average tax rate is 27.3% and your marginal tax rate is 34.4%. 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 $34.35, hence, your net pay will only increase by $65.65.
A $1,000 bonus will generate an extra $657 of net incomes. A $5,000 bonus will generate an extra $3,283 of net incomes.