Summary
If you make $ 3,900,000 a year living in Hong Kong, you will be taxed $ 637,500. That means that your net pay will be $ 3,262,500 per year, or $ 271,875 per month. Your average tax rate is 16.4% and your marginal tax rate is 17.0%. 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 $ 17, hence, your net pay will only increase by $ 83.
Bonus Example
A $ 1,000 bonus will generate an extra $ 830 of net incomes. A $ 5,000 bonus will generate an extra $ 4,150 of net incomes.