Summary
If you make $66,430 a year living in the region of California, USA, you will be taxed $16,213. That means that your net pay will be $50,217 per year, or $4,185 per month. Your average tax rate is 24.4% and your marginal tax rate is 40.7%. 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 $40.69, hence, your net pay will only increase by $59.31.
Bonus Example
A $1,000 bonus will generate an extra $593 of net incomes. A $5,000 bonus will generate an extra $2,966 of net incomes.