The preferred value-added service fee is not deducted every month. The specific situation is different from bank to bank.

For example, the "classic" and "upgraded version" self-service of China Merchants Bank will automatically deduct the service fee every month. However, there are also banks, such as China CITIC Bank, whose preferred value-added service fees are deducted annually.

Therefore, the specific deduction method is subject to bank regulations. If you are not sure about the preferred deduction method of value-added service fees, it is recommended that you consult the relevant bank or check the relevant regulations of the bank to obtain more accurate information.