Disclosed is a supporting system for tiles to obtain floorings raised with respect to a reference ground. The supporting system includes a grid having at least three sides defining the perimeter of the grid and a supporting surface on which the tile can rest. At least one first seat is formed within the perimeter of the grid and at least one second seat is formed along the perimeter of the grid in correspondence of an arched recess. The supporting system includes at least one sustaining element resting on the ground and including at least one protruding body inserted in the first or second seat.