Summary
If you make $39,980 a year living in the region of Iowa, USA, you will be taxed $7,654. That means that your net pay will be $32,326 per year, or $2,694 per month. Your average tax rate is 19.1% and your marginal tax rate is 25.1%. 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 $25.09, hence, your net pay will only increase by $74.91.
Bonus Example
A $1,000 bonus will generate an extra $749 of net incomes. A $5,000 bonus will generate an extra $3,746 of net incomes.