Summary
If you make $64,116 a year living in the region of Montana, USA, you will be taxed $15,203. That means that your net pay will be $48,913 per year, or $4,076 per month. Your average tax rate is 23.7% and your marginal tax rate is 35.7%. 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 $35.65, hence, your net pay will only increase by $64.35.
Bonus Example
A $1,000 bonus will generate an extra $644 of net incomes. A $5,000 bonus will generate an extra $3,218 of net incomes.