Summary
If you make 61,776,000 원 a year living in South Korea, you will be taxed 11,696,172 원. That means that your net pay will be 50,079,828 원 per year, or 4,173,319 원 per month. Your average tax rate is 18.9% and your marginal tax rate is 23.4%. 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 23.38 원, hence, your net pay will only increase by 76.62 원.
Bonus Example
A 1,000 원 bonus will generate an extra 766 원 of net incomes. A 5,000 원 bonus will generate an extra 3,831 원 of net incomes.