Summary
If you make $1,370 a year living in the region of California, USA, you will be taxed $120. That means that your net pay will be $1,250 per year, or $104 per month. Your average tax rate is 8.8% and your marginal tax rate is 8.8%. 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 $8.75, hence, your net pay will only increase by $91.25.
Bonus Example
A $1,000 bonus will generate an extra $913 of net incomes. A $5,000 bonus will generate an extra $4,563 of net incomes.