While electronic payment methods are becoming more popular in South Korea, cash is still widely used and may be necessary in certain situations such as for small businesses, street vendors, taxis, and public transportation. Credit cards are widely accepted at larger businesses, but some may charge additional fees. Debit cards linked to international networks such as Plus or Cirrus are generally accepted at most ATMs in Korea. Mobile payment options such as Samsung Pay and Apple Pay have become increasingly popular. Tipping is not customary in Korea, and tax refunds are available for purchases made by foreign visitors. It's important to have some emergency cash on hand in case of unforeseen circumstances.