If you make $55,000 a year living in the region of Iowa, USA, you will be taxed $11,691. That means that your net pay will be $43,309 per year, or $3,609 per month. Your average tax rate is 21.3% and your marginal tax rate is 34.9%. 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 $34.86, hence, your net pay will only increase by $65.14.
A $1,000 bonus will generate an extra $651 of net incomes. A $5,000 bonus will generate an extra $3,257 of net incomes.