A system for dynamic currency conversion is provided. The system includes a bank identifier system determining whether currency conversion is available for a card-issuing bank of a presented card, such as by comparing a bank identifier from the card with a list or table of participating banks. An exchange rate system determines whether an exchange rate has expired, such as an exchange rate associated with the foreign currency of the card-issuing bank. The card holder is presented with an option for selecting a foreign currency transaction after it is determined that currency conversion is available for the card-issuing bank and that the exchange rate has not expired, such that the card holder does not need to see such information unless foreign currency processing is available.