Summary
If you make $39,146 a year living in the region of Massachusetts, USA, you will be taxed $7,925. That means that your net pay will be $31,221 per year, or $2,602 per month. Your average tax rate is 20.2% and your marginal tax rate is 25.0%. 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, hence, your net pay will only increase by $75.
Bonus Example
A $1,000 bonus will generate an extra $750 of net incomes. A $5,000 bonus will generate an extra $3,750 of net incomes.