The purpose of the study is a sociological and comprehensive social analysis of the reasons for the employee resignation of a large Russian company. Methods for collecting information are secondary analysis of exit survey data (exit interview - a survey in the last days of an employee's work) and a telephone survey of former (who quit several months ago) employees of the organization. Based on a comparison of data obtained from two sources of information, a conclusion was made: a survey conducted after some time provides more “reliable” information compared to that collected upon resignation. If at the exit interview, the reasons for resignation and future employment were clarified, then after some time more detailed information was received about the weaknesses of working in the company and about the new employer. As a result of a telephone interview with those who quit, it turned out that dissatisfaction with salary is one of the most common reasons for resignation. More than a third of respondents quit because they found a new job, the rest most often looked for it for a month (about a third) or longer. About half of former employees are ready to return to the company subject to increased salary, opportunities for career growth, etc. The employer loyalty index (eNPS) in the studied case has a negative value, which indicates a weak employer brand (position compared to competitors in the labor market) and the need to optimize the process of parting with an employee. The practical significance of the study lies in the tool tested during the research process, which will allow managers and HR specialists to comprehensively study and objectively assess the resignation reasons in their organizations.