If you make $40,000 a year living in the region of New York, USA, you will be taxed $8,101. That means that your net pay will be $31,899 per year, or $2,658 per month. Your average tax rate is 20.3% and your marginal tax rate is 26.1%. 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 $26.13, hence, your net pay will only increase by $73.87.
A $1,000 bonus will generate an extra $739 of net incomes. A $5,000 bonus will generate an extra $3,694 of net incomes.