Summary
If you make $3,990,168 a year living in the region of Maine, USA, you will be taxed $1,820,470. That means that your net pay will be $2,169,698 per year, or $180,808 per month. Your average tax rate is 45.6% and your marginal tax rate is 46.5%. 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 $46.50, hence, your net pay will only increase by $53.50.
Bonus Example
A $1,000 bonus will generate an extra $535 of net incomes. A $5,000 bonus will generate an extra $2,675 of net incomes.