Summary
If you make $12,500 a year living in the region of Delaware, USA, you will be taxed $1,191. That means that your net pay will be $11,310 per year, or $942 per month. Your average tax rate is 9.5% and your marginal tax rate is 12.1%. 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 $12.05, hence, your net pay will only increase by $87.95.
Bonus Example
A $1,000 bonus will generate an extra $880 of net incomes. A $5,000 bonus will generate an extra $4,398 of net incomes.