Abstract: A cargo tray for a motor vehicle is adapted to be carried by a seatback of an occupant seat. The cargo tray is operable in a stowed mode in which a bottom surface is positioned substantially flush against the seatback and in an operative mode in which the bottom surface provides a generally horizontal support surface upwardly spaced from a floor of the motor vehicle. In the preferred embodiment, the bottom surface of the cargo tray is pivotally attached to the seatback of the occupant seat and intended to be utilized when the seatback is articulated to a folded position. In such a use, the bottom surface cooperates with the now horizontally oriented seatback to provide an extended support surface, thereby increasing cargo capacity.