Summary
If you make $12,979 a year living in the region of Idaho, USA, you will be taxed $999. That means that your net pay will be $11,980 per year, or $998 per month. Your average tax rate is 7.7% and your marginal tax rate is 16.5%. 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 $16.46, hence, your net pay will only increase by $83.54.
Bonus Example
A $1,000 bonus will generate an extra $835 of net incomes. A $5,000 bonus will generate an extra $4,177 of net incomes.