If a credit card is charging a 3% foreign transaction fee, it means your bank will charge an additional 3% from you when billing your credit card dues. For example, if you use Rs 10,000 for a foreign currency transaction, then the bank will charge you an additional Rs 300 for the foreign currency transaction you did using the credit card. Hence, the credit card statement will reflect the amount of Rs 10,300 instead of Rs 10,000.