Summary
If you make $18,491 a year living in the region of Iowa, USA, you will be taxed $2,431. That means that your net pay will be $16,060 per year, or $1,338 per month. Your average tax rate is 13.1% and your marginal tax rate is 22.1%. 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 $22.12, hence, your net pay will only increase by $77.88.
Bonus Example
A $1,000 bonus will generate an extra $779 of net incomes. A $5,000 bonus will generate an extra $3,894 of net incomes.