From 31 May 2016 (date of ticket issue) Austrian Airlines, Lufthansa and SWISS will be changing the OPC calculation. The currently fixed OPC will be replaced by a percentage value which is the equivalent of 1.65% of the ticket price. The charge is limited to a maximum of EUR 25 (CHF 30 / GBP 20) per ticket, thus limiting the customer’s share of credit card charges. The new OPC will be introduced in all sales channels and in future automatically included in the reservation systems (GDS). The forms of payment and countries of departure where OPC is due (Belgium, Germany, Great Britain, Finland, Ireland, Netherlands and Switzerland) remain unchanged.