A payment server configured to share payments among occupants of a vehicle. The payment server receives a payment request comprising a payment amount and a vehicle identification, accesses a database record associated with the vehicle identification, the record including an identification and seat position of each vehicle occupant as determined from a mobile device of each occupant, and identifies the vehicle driver. The server transmits to an in-vehicle infotainment (IVI) system a first billing message associated with the payment request, the IVI system displaying the first billing message on a screen of an IVI head unit. The first billing message offers the driver an option to share the payment amount with a second occupant of the vehicle.