Summary
If you make $51,000 a year living in the region of Massachusetts, USA, you will be taxed $10,893. That means that your net pay will be $40,107 per year, or $3,342 per month. Your average tax rate is 21.4% and your marginal tax rate is 25.5%. 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 $25.54, hence, your net pay will only increase by $74.46.
Bonus Example
A $1,000 bonus will generate an extra $745 of net incomes. A $5,000 bonus will generate an extra $3,723 of net incomes.