Summary
If you make $64,940 a year living in the region of California, USA, you will be taxed $15,607. That means that your net pay will be $49,333 per year, or $4,111 per month. Your average tax rate is 24.0% and your marginal tax rate is 40.0%. 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 $40.01, hence, your net pay will only increase by $59.99.
Bonus Example
A $1,000 bonus will generate an extra $600 of net incomes. A $5,000 bonus will generate an extra $3,000 of net incomes.