Until recently it was considered that IQ is crucial for business success. However, recent investigations show that business success depends mostly on emotional intelligence. Emotional intelligence, as a concept, describes numerous human features such as the character, sensitivity and humanity, and those are extremely important for person to be a great manager. Managers are the main persons that manage the employees and as such they should strive to increase ambition and motivation. Managers should take into consideration when hiring new employees, their emotional intelligence. This is extremely important in jobs that require a great deal of social interaction. Numerous studies confirm that the best employees are those who have a high level of emotional intelligence. Such employees are extremely important resource of every modern and successful company. How to develop emotional intelligence in business? The answer lies in flexible planning which is the most important ability to change moods. Also, emotional intelligence is developed through solving various tasks that are requiring creativity in business. For its development it is necessary to become aware of your own feelings, and then to establish a relationship with them. In that way person can better understand and accept the feelings of other and ultimately improve their own skills. Emotional intelligence is the key to become successful leadership because emotionally intelligent and empathetic leaders feel needs and wants of their employees. Listen to what others are saying and read their the reactions and they will follow you.