Summary
If you make 315,000,400 ₫ a year living in Vietnam, you will be taxed 69,660,114 ₫. That means that your net pay will be 245,340,286 ₫ per year, or 20,445,024 ₫ per month. Your average tax rate is 22.1% and your marginal tax rate is 28.4%. 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 28.40 ₫, hence, your net pay will only increase by 71.60 ₫.
Bonus Example
A 1,000 ₫ bonus will generate an extra 716 ₫ of net incomes. A 5,000 ₫ bonus will generate an extra 3,580 ₫ of net incomes.