This thesis deals with the impact of emotions and emotional intelligence on business and success in business. Emotions are the key drivers of human behavior, and emotional intelligence includes the ability to recognize and manage one's own and other people's emotions. It is considered an important skill that is crucial for success in the workplace. According to many researches, it is more important than the intelligence quotient in predicting success, because it enables better conflict resolution, strengthening teamwork, motivating employees and building a positive organizational culture. This paper also elaborates on theoretical models of emotional intelligence, among which the most famous are the Mayer-Salovey model, the Bar-On model and the Goleman model, and provides an overview of tools for measuring emotional intelligence. Key emotional and social competences related to business have been elaborated. Emotional intelligence helps with hiring, conflict resolution and employee satisfaction, and emotionally intelligent leaders encourage innovation and teamwork. In the paper, research was conducted through a questionnaire using the emotional intelligence scale (BEIS-10).