Summary
If you make 483,887,040 원 a year living in South Korea, you will be taxed 189,791,206 원. That means that your net pay will be 294,095,834 원 per year, or 24,507,986 원 per month. Your average tax rate is 39.2% and your marginal tax rate is 46.2%. This marginal tax rate means that your immediate additional income will be taxed at this rate. For instance, an increase of 100 원 in your salary will be taxed 46.16 원, hence, your net pay will only increase by 53.84 원.
Bonus Example
A 1,000 원 bonus will generate an extra 538 원 of net incomes. A 5,000 원 bonus will generate an extra 2,692 원 of net incomes.