If you make $55,000 a year living in the region of California, USA, you will be taxed $11,676. That means that your net pay will be $43,324 per year, or $3,610 per month. Your average tax rate is 21.2% and your marginal tax rate is 39.6%. 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 $39.55, hence, your net pay will only increase by $60.45.
A $1,000 bonus will generate an extra $605 of net incomes. A $5,000 bonus will generate an extra $3,023 of net incomes.