Abstract
Object: To define the concept of internal audit in the commercial organisations in Kazakhstan, specify the problems, and find solutions to these problems.Methods: System analysis (analytical and synthetic methods) and information structuring.Results: The conceptual essence is systematized based on the scientific approaches of the internal audit understanding. Moreover, the cause-and-effect factors of the internal audit functioning are determined. In this study, theproblems regarding the development of internal audit are studied and ways of solving these problems are proposed.Conclusions: A clear systematization of scientific approaches to the concept of internal audit, identification of the causes of problems with the running internal audit in the commercial organisations in Kazakhstan will ensure the progressive development of internal audit.