You want exposure to US indexes, and there are two routes. ① Buy a Korea-listed ETF that tracks a US index, or ② buy the US-listed ETF directly. Same index — but completely different tax, currency and trading hours.
Short version: smaller amounts traded often tend to favor Korea-listed; larger amounts held long term often favor buying US-listed directly. Your situation decides.
Side by side
| Capital gains tax | Korea-listed: 15.4% dividend tax / US-listed: 22% capital gains tax |
| Basic deduction | Korea-listed: none / US-listed: ₩2.5M per year |
| Offsetting losses | Korea-listed: no / US-listed: yes (within the same year) |
| Global financial income tax | Korea-listed: included (over ₩20M/yr) / US-listed: excluded |
| Filing | Korea-listed: withheld automatically / US-listed: you file in May |
| Currency exchange | Korea-listed: not needed / US-listed: needed (FX fees) |
| Trading hours | Korea-listed: Korean hours / US-listed: overnight in Korea |
Why the tax difference decides it
15.4% looks lower than 22% — until you count the ₩2.5M annual deduction on direct US investing.
- ₩2M gain → Korea-listed: about ₩308,000 tax / US-listed: zero (within the deduction)
- ₩10M gain → Korea-listed: ₩1.54M / US-listed: (10M−2.5M)×22% = ₩1.65M
So smaller gains favor direct US investing, larger gains appear to favor Korea-listed. But that's not the whole story.
The real fork is the global financial income tax. Gains on Korea-listed foreign ETFs count as dividend income, which combines with interest and dividends — and above ₩20M a year you're pulled into comprehensive taxation. Gains on US-listed ETFs are taxed separately and never join that total. The bigger your portfolio, the more this matters.
Loss offsetting — the overlooked gap
Direct US investing nets your year: make ₩5M on one position, lose ₩3M on another, and you're taxed on ₩2M — which the ₩2.5M deduction may erase entirely.
Korea-listed foreign ETFs withhold on each gain and do not offset losses. You can end a losing year having still paid tax.
Other practical differences
- Currency — direct investing adds FX fees and full exposure to exchange-rate moves.
- Hours — US markets trade overnight in Korea, which affects your sleep as much as your strategy.
- Selection — the US market offers far more products and scale.
- Pension accounts — Korean pension savings and IRP accounts cannot hold US-listed ETFs directly. Using those accounts means choosing Korea-listed products.
- ISA — can add tax benefits to Korea-listed ETFs (see the ISA guide).
FAQ
So which should I pick?
No universal answer, but a rule of thumb: using pension or ISA accounts points to Korea-listed; large, long-held positions in a regular account often favor direct US investing on tax.
How do I pay tax on US-listed gains?
File and pay capital gains tax during the May filing period. Brokerages often offer a filing service.
What about dividends?
US ETF dividends are withheld at source and treated as dividend income in Korea. Note that dividends do count toward the global financial income threshold.
The same index is taxed differently depending on where you buy it. Decide your size and account type first, then pick the product.
This is general information, not investment or tax advice. Tax law and product structures change and outcomes vary by individual — confirm with Hometax, your brokerage or a tax professional.
