Summary
If you make $40,190 a year living in the region of Montana, USA, you will be taxed $8,127. That means that your net pay will be $32,063 per year, or $2,672 per month. Your average tax rate is 20.2% and your marginal tax rate is 25.7%. 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 $25.65, hence, your net pay will only increase by $74.35.
Bonus Example
A $1,000 bonus will generate an extra $744 of net incomes. A $5,000 bonus will generate an extra $3,718 of net incomes.