Process for the preparation of bleach activator granules, which comprises extruding a mixture comprising bleach activator, anionic or nonionic surfactant and polyalkylene glycol at temperatures of from 40 to 120.degree. C. and a pressure of from 5 to 30 bar, and granulating the resultant extrudates at a temperature of from 40 to 120.degree. C. on a spheronizer.