Summary
If you make 92,300,000 원 a year living in South Korea, you will be taxed 20,192,577 원. That means that your net pay will be 72,107,423 원 per year, or 6,008,952 원 per month. Your average tax rate is 21.9% and your marginal tax rate is 28.6%. 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 28.64 원, hence, your net pay will only increase by 71.36 원.
Bonus Example
A 1,000 원 bonus will generate an extra 714 원 of net incomes. A 5,000 원 bonus will generate an extra 3,568 원 of net incomes.