The Basics of South Korean Overseas-Stock Capital-Gains Tax

Under South Korean tax law, a Korean tax resident's gains from US-stock (and other overseas-stock) trading are combined for the full calendar year, the 250-man-won (2,500,000 won) basic deduction is subtracted, and 22% (including local income tax) is charged on what remains. Gaining and losing positions offset each other, and the filing and payment happen the following May during the comprehensive income tax period. Enter your realized gains and losses above to get an instant estimate of your tax and post-deduction taxable base.

Timing strategies like year-end loss offsetting or spreading a gain across years to reuse the 250-man-won limit are covered in detail in the guide to South Korean capital-gains tax on US stocks. To compare the after-tax result of direct investing against Pension Savings/IRP and ISA side by side, use the pension vs. direct investing after-tax comparison. These results are estimates for reference only; your actual tax can vary by individual circumstances and this does not replace advice from a tax professional.