Summary
If you make 268,559,208 원 a year living in South Korea, you will be taxed 92,529,961 원. That means that your net pay will be 176,029,247 원 per year, or 14,669,104 원 per month. Your average tax rate is 34.5% 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 43.78 원, hence, your net pay will only increase by 56.22 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 2,811 원 of net incomes.