Summary
If you make $166,700 a year living in the region of Washington, USA, you will be taxed $42,912. That means that your net pay will be $123,788 per year, or $10,316 per month. Your average tax rate is 25.7% 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 $25.45, hence, your net pay will only increase by $74.55.
Bonus Example
A $1,000 bonus will generate an extra $746 of net incomes. A $5,000 bonus will generate an extra $3,728 of net incomes.