Summary
If you make 218,832,640 원 a year living in South Korea, you will be taxed 70,763,863 원. That means that your net pay will be 148,068,777 원 per year, or 12,339,065 원 per month. Your average tax rate is 32.3% and your marginal tax rate is 43.8%. 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 43.77 원, hence, your net pay will only increase by 56.23 원.
Bonus Example
A 1,000 원 bonus will generate an extra 562 원 of net incomes. A 5,000 원 bonus will generate an extra 2,812 원 of net incomes.