ETF Capital Gains Tax Guide | Overseas & Domestic ETF Tax Overview

Capital gains from selling overseas ETFs (including U.S.-listed ETFs) are subject to capital gains tax in Korea. A basic annual deduction of KRW 2.5 million applies, and gains exceeding this threshold are taxed at 22% (20% capital gains tax + 2% local income tax). For example, if you realize KRW 10 million in overseas ETF gains, you would pay 22% on the KRW 7.5 million above the deduction — approximately KRW 1.65 million. This tax must be self-reported during the annual filing period (May 1–31) through the Korean National Tax Service (Hometax). Unlike domestic securities, brokerages do not automatically withhold this tax. Failure to report can result in penalty surcharges of 10–20%. Dividends from overseas ETFs are subject to withholding tax at the source country rate (15% for U.S. ETFs).

Domestic Korean-listed ETFs are taxed differently based on their underlying assets. Domestic equity ETFs (e.g., KODEX 200, TIGER KOSPI) enjoy tax-free capital gains on trades. However, distributions (dividends) are subject to 15.4% dividend income tax (14% income tax + 1.4% local tax), which is automatically withheld by the brokerage. In contrast, other ETF types — including international equity, bond, commodity, leveraged, and inverse ETFs — are subject to 15.4% dividend income tax on trading gains. The taxable amount is the lesser of actual trading profit and the change in the tax-base NAV. Since brokerages automatically withhold these taxes, no separate filing is required unless total financial income (interest + dividends) exceeds KRW 20 million, which triggers comprehensive income taxation.

When calculating overseas ETF capital gains tax, you can offset gains and losses across all overseas stocks and ETFs within the same tax year (January–December). For instance, if Stock A generated KRW 5 million in gains and Stock B resulted in KRW 2 million in losses, the net gain is KRW 3 million, and after the KRW 2.5 million deduction, only KRW 500,000 is taxable. This makes year-end tax-loss harvesting — strategically selling losing positions to offset gains — a highly effective strategy. Annual filing is done through Hometax (hometax.go.kr) each May, using the overseas stock capital gains statement provided by your brokerage. If you use multiple brokerages, you must aggregate all statements into a single filing.

The most effective ETF tax-saving strategy is using tax-advantaged accounts. ETF trades within pension savings accounts and IRPs (Individual Retirement Pensions) defer all capital gains and dividend taxes until pension withdrawal. At withdrawal, a favorable pension income tax rate of 3.3–5.5% applies — significantly lower than standard rates. Additionally, annual contributions up to KRW 6 million (pension savings) or KRW 9 million (including IRP) qualify for tax credits of 13.2–16.5% depending on income level. ISA (Individual Savings Account) is another valuable tool: net gains up to KRW 2 million (KRW 4 million for lower-income plans) are tax-free, with excess gains taxed at a reduced 9.9% rate. Note that ISA only allows trading of domestically-listed ETFs — direct overseas ETF investment is not available within ISA.