No, according to the query of Lacarra brand official website, the pos traffic fee is not necessarily deducted once a year, but monthly, quarterly and yearly. Generally, a regular personal POS machine is only deducted once a year. Therefore, the pos machine does not deduct the traffic fee for each credit card. Sales terminal -POS is a multifunctional terminal. It can be installed in special merchants and acceptance outlets of credit cards, and connected with computers to realize automatic transfer of electronic funds. With the functions of supporting consumption, pre-authorization, balance inquiry and transfer, it is safe and fast to use. The POS machine reads the magnetic stripe information on the cardholder's bank card through the card reader, the operator of the POS machine inputs the transaction amount, the cardholder inputs the personal identification information, that is, the password, and the POS machine sends the information through the UnionPay center. Reliable.