Summary
If you make $8,965 a year living in the region of Colorado, USA, you will be taxed $912. That means that your net pay will be $8,053 per year, or $671 per month. Your average tax rate is 10.2% and your marginal tax rate is 12.2%. 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 $12.19, hence, your net pay will only increase by $87.81.
Bonus Example
A $1,000 bonus will generate an extra $878 of net incomes. A $5,000 bonus will generate an extra $4,391 of net incomes.