Currency exchange is much more advantageous after arriving in Korea than before arrival. Best methods: Myeongdong exchange shops – Seoul’s highest exchange rates. Exchange shops near Exit 8 of Myeongdong Station (Line 4) offer high exchange rates with no fees. Mobile banking apps – Exchange through Woori Bank, Hana Bank, or KB Kookmin Bank apps and pick up at the airport. Up to 90% fee discounts available. Airport exchange – Exchange rates are less favorable than downtown, but okay for small amounts in urgent situations. Places to avoid: Hotel exchange – High fees and poor rates. Airport ATMs – High fees. How much cash do you need in Korea: In Seoul, card payments are accepted almost everywhere. Only traditional markets, small restaurants, and some street vendors require cash.