A dosing unit (100) for automatically dosing a dosing amount (122) of a solid detergent provided by a storage cartridge (110) for storing a bulk (112) of the solid detergent, for use in an automatic dosing system (20) of a water-bearing household appliance (1), wherein the storage cartridge (110) comprises a reversibly deformable container (114) with an outlet (116), wherein by deforming the container (114) according to a predefined pattern in time detergent of the bulk (112) is transported towards the outlet (116), and a dosing device (120) is attached to the storage cartridge (110) on the outlet (116) for separating the dosing amount (122) from the bulk (112) and releasing the separated dosing amount (122).