Summary
If you make $166,500 a year living in the region of Massachusetts, USA, you will be taxed $50,946. That means that your net pay will be $115,554 per year, or $9,629 per month. Your average tax rate is 30.6% and your marginal tax rate is 30.5%. 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 $30.45, hence, your net pay will only increase by $69.55.
Bonus Example
A $1,000 bonus will generate an extra $696 of net incomes. A $5,000 bonus will generate an extra $3,478 of net incomes.