A payment support system includes a terminal ID acquisition processing unit, a position acquisition processing unit, an association processing unit, and a payment processing unit. The terminal ID acquisition processing unit acquires identification information of a user terminal of a user who entered a facility. The position acquisition processing unit acquires position information of the user terminal. The association processing unit stores the identification information acquired by the terminal ID acquisition processing unit and a use price of the facility of the user in a storage unit in association with each other. The payment processing unit executes a payment process of the use price when the user terminal is separated from a predetermined area of the facility by a predetermined distance or more after exiting the predetermined area.