The credit card processing fee is 2% to 3% after the store accepts customers' credit cards. In order to save costs, some manufacturers will ask cardholders to pay extra handling fees, because credit cards must be invoiced, which makes it impossible for shops to evade taxes. All the settlement fees of bank card acquiring business are borne by merchants, but the rates implemented by different industries are different, ranging from 0.5% to 4%. Generally speaking, the charge standard of credit card in retail industry is 0.8%- 1%, supermarket is 0.5%, and catering industry is 2%.