Summary
If you make $37,670 a year living in the region of California, USA, you will be taxed $6,918. That means that your net pay will be $30,752 per year, or $2,563 per month. Your average tax rate is 18.4% and your marginal tax rate is 25.3%. 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 $25.28, hence, your net pay will only increase by $74.72.
Bonus Example
A $1,000 bonus will generate an extra $747 of net incomes. A $5,000 bonus will generate an extra $3,736 of net incomes.