Seeing familiar “KRW” on a payment terminal abroad can feel reassuring: no calculator needed. But an easy-to-read won amount is not the same as a favorable conversion cost. Read the conversion terms before following a familiar currency label.
Official sources checked on October 23, 2026: Visa’s DCC guidance and HSBC Malaysia’s currency-choice explanation. These explain the structure, not the fees, exchange rates or benefits of a particular Korean card. This article focuses on card purchases at overseas merchants.
Key points
- Distinguish checkout conversion to won from reading a later card statement in won.
- Check currency, rate and extra costs; local-currency payments can still carry issuer fees.
- If pressured, decline the conversion offer and keep the receipt when contacting the issuer.
Terms before familiar currency
Four checks before and after a DCC choice.
- 01Local priceOriginal amount and currency symbol
- 02Payment currencyLocal or home currency choice
- 03Conversion termsRate, costs and markup
- 04Receipt checkActual processed currency and amount
1. DCC converts to your home currency at the point of payment
Visa describes DCC as a merchant or ATM offering to convert a transaction into the cardholder’s home currency. If you are offered conversion to won during payment, look at the rate and extra costs together. Visa DCC guidance
Do not confuse that with seeing a later won amount on your statement after a local-currency purchase. The key question is which currency you selected at the terminal, rather than the currency in which you eventually read the statement.
2. A Japanese restaurant offers JPY or KRW
A hypothetical: a meal costs 5,000 yen and the terminal asks you to choose JPY or KRW. Distinguish paying in JPY from accepting conversion to won at checkout. This is not a real terminal screen or rate quote; no won equivalent has been invented.
HSBC explains that the retailer or its bank sets the DCC exchange rate and that extra costs apply. For local-currency payment, it says Visa or Mastercard sets the rate and the bank may charge a separate transaction fee. Check your Korean issuer’s actual billing terms. HSBC currency-choice explanation
| Item to check | What to read | Easily missed distinction |
|---|---|---|
| Local price | Local amount and currency symbol | Start with the original price, not familiar digits |
| Selected payment currency | JPY, EUR or another local currency, versus KRW | Whether checkout conversion was accepted |
| DCC terms | Rate, extra fees and markup | A won display alone does not prove a lower cost |
| Receipt after payment | Processed currency and amount | Compare with your actual selection |
3. Does local currency mean every fee is zero?
No. HSBC says local-currency payment avoids DCC fees and usually offers a better exchange rate, while separately noting possible bank fees. Avoiding DCC is different from having no overseas transaction costs at all. Local currency and bank fees
Before departure, check your issuer’s overseas fees and conversion basis. This is not a comparison promising that one card is always cheaper or quoting today’s exchange rate.
4. What if someone chooses for you or terms are missing?
Visa says the screen and receipt should clearly show both amounts, currency symbols, the rate and extra costs, and the cardholder must be given a choice. If details are missing or you feel pressured, it recommends declining the conversion offer and reporting the incident to your issuer. Choice and disclosure
Check the selected currency before authorization and keep the receipt afterward. If unwanted won conversion was processed, contact your issuer with the receipt and an explanation of how the choice was made. This does not guarantee cancellation or a refund. Follow local price → payment currency → conversion terms → receipt check.