Starting with an introduction to finance and financial mathematics, this textbook thoroughly covers the segments of investment and financing. Care has been taken to address the subject matter from both a theoretical finance perspective and a practical application viewpoint. A variety of illustrations and practical examples contribute to a high level of understanding of the topics. Through numerous exercises with solution hints, readers can independently verify and reinforce their knowledge. The textbook is aimed at students and lecturers in Bachelor's degree programs in Business Administration at dual universities, vocational academies, universities of applied sciences, and universities. Additionally, the book provides practitioners with a concise overview. The 4th edition has been updated and corrected. Online, supplementary slides for lecturers are also available.