A transom lift for boats that can be used for loading and transporting objects such as a dinghy or large coolers. The transom lift has generally parallel and vertical members that fit inside of generally vertical and parallel sides of transom mount ladders. Hooks extend from the generally parallel, spaced apart, elongated, and vertical members, and are constructed and arranged to fit over steps of the transom mount ladder. A supported planar member or platform extends from a lower portion of the generally vertical, spaced apart, elongated, and parallel members. The transom lift is raised and lowered by pulling on an upper end of the transom lift using the transom mount ladder as a guide for vertical movement of the transom lift. The hooks position and hold the planar member or platform in the desired vertical position, either above or below the water line.