Summary
If you make $21,320 a year living in the region of South Carolina, USA, you will be taxed $3,469. That means that your net pay will be $17,851 per year, or $1,488 per month. Your average tax rate is 16.3% and your marginal tax rate is 25.4%. 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 $25.36, hence, your net pay will only increase by $74.64.
Bonus Example
A $1,000 bonus will generate an extra $746 of net incomes. A $5,000 bonus will generate an extra $3,732 of net incomes.