Summary
If you make $139,991 a year living in the region of South Dakota, USA, you will be taxed $35,035. That means that your net pay will be $104,956 per year, or $8,746 per month. Your average tax rate is 25.0% and your marginal tax rate is 30.0%. 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 $29.96, hence, your net pay will only increase by $70.04.
Bonus Example
A $1,000 bonus will generate an extra $700 of net incomes. A $5,000 bonus will generate an extra $3,502 of net incomes.