Summary
If you make $99,965 a year living in the region of California, USA, you will be taxed $29,945. That means that your net pay will be $70,020 per year, or $5,835 per month. Your average tax rate is 30.0% and your marginal tax rate is 42.0%. 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 $42.01, hence, your net pay will only increase by $57.99.
Bonus Example
A $1,000 bonus will generate an extra $580 of net incomes. A $5,000 bonus will generate an extra $2,900 of net incomes.