Summary
If you make $1,123 a year living in the region of Iowa, USA, you will be taxed $85.91. That means that your net pay will be $1,037 per year, or $86.42 per month. Your average tax rate is 7.7% and your marginal tax rate is 7.7%. 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 $7.65, hence, your net pay will only increase by $92.35.
Bonus Example
A $1,000 bonus will generate an extra $924 of net incomes. A $5,000 bonus will generate an extra $4,618 of net incomes.