Summary
If you make $684,060 a year living in the region of Hawaii, USA, you will be taxed $288,430. That means that your net pay will be $395,630 per year, or $32,969 per month. Your average tax rate is 42.2% and your marginal tax rate is 47.3%. 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 $47.25, hence, your net pay will only increase by $52.75.
Bonus Example
A $1,000 bonus will generate an extra $528 of net incomes. A $5,000 bonus will generate an extra $2,638 of net incomes.