Summary
If you make 699,999,997 ₫ a year living in Vietnam, you will be taxed 191,249,999 ₫. That means that your net pay will be 508,749,998 ₫ per year, or 42,395,833 ₫ per month. Your average tax rate is 27.3% and your marginal tax rate is 37.2%. 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 37.22 ₫, hence, your net pay will only increase by 62.78 ₫.
Bonus Example
A 1,000 ₫ bonus will generate an extra 628 ₫ of net incomes. A 5,000 ₫ bonus will generate an extra 3,139 ₫ of net incomes.