The costs of DCC typically vary depending on the currency the customer wants to pay in and the currency the product or service is offered.
The more “exotic” the currency, the higher the DCC fees might be. Exchange rate markups usually vary between 2.6% to up to 11%. As DCC is optional, customers have the right to decline it when offered.
If the customer does decline the DCC at the point of sale, the currency conversion will be done by the customer’s bank and their own rates will be applied.