Summary
If you make $18,000 a year living in the region of Mississippi, USA, you will be taxed $2,367. That means that your net pay will be $15,633 per year, or $1,303 per month. Your average tax rate is 13.2% and your marginal tax rate is 22.7%. 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 $22.65, hence, your net pay will only increase by $77.35.
Bonus Example
A $1,000 bonus will generate an extra $774 of net incomes. A $5,000 bonus will generate an extra $3,868 of net incomes.