Customers may face higher prices as the operator of the Easy Pay System (EPS) revamps the scale of its charges from a standard fee per transaction to a percentage charge. For every transaction made with an EPS card, the retailer will have to pay EPS Co a 0.75 per cent service fee, compared with a flat rate of $2 per transaction before the changes were implemented last month. The system allows customers to use their ATM card to buy goods. Yesterday, jewellery retailers expressed concern the change would increase operating costs and lead to higher prices. According to retailers, transactions in the industry amount to more than $100 million a month and about 20 per cent of sales are EPS payments. Hong Kong Jewellers' and Goldsmiths' Association chairman Leung Sik-wah said he was worried small and medium-sized retailers would be among the hardest hit. Liberal Party legislator Selina Chow Liang Shuk-yee said the change was unreasonable and against the principle of fair competition. It would hurt the retail and tourism industries in the long term. 'While the Government is encouraging the increased use of e-commerce among small and medium enterprises, EPS seems to be doing exactly the opposite,' she said.