Summary
If you make $31,111 a year living in the region of Iowa, USA, you will be taxed $5,446. That means that your net pay will be $25,665 per year, or $2,139 per month. Your average tax rate is 17.5% and your marginal tax rate is 24.9%. 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 $24.88, hence, your net pay will only increase by $75.12.
Bonus Example
A $1,000 bonus will generate an extra $751 of net incomes. A $5,000 bonus will generate an extra $3,756 of net incomes.