Summary
If you make $12,979 a year living in the region of Iowa, USA, you will be taxed $1,251. That means that your net pay will be $11,728 per year, or $977 per month. Your average tax rate is 9.6% and your marginal tax rate is 19.5%. 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 $19.47, hence, your net pay will only increase by $80.53.
Bonus Example
A $1,000 bonus will generate an extra $805 of net incomes. A $5,000 bonus will generate an extra $4,027 of net incomes.