The use of success fees has significantly increased in recent years. This could lead one to conclude that both clients and consultants welcome this trend. However, its implementation is a subject of controversy, with the central question being how the success of consulting services can be measured and how existing obstacles can be overcome. Against this background, Bärbel Fleischer has examined through six case studies how success measurement is conducted in corporate practice when using success fees. Based on this, she formulates theses regarding the use of success fees and derives recommendations for measuring success.