Аңдатпа
The purpose of this research: defining the essence and types of business models in internal audit and identifying its main elements. Methodology: in order to achieve the goal of the research the general scientific methods were applied: the method of content analysis helped to identify the main scientific directions related to the research of typology of internal audit effectiveness; the method of a systematic approach helped to identify and construct the main types of business models of internal audit effectiveness; the structural-functional method helped to structure information into the business models and to set the relations between its elements according to the functions; the method of graphic interpretation made it possible to visually present the developed business models based on information obtained. Originality / value of the research: The contribution of this empirical work is the disclosure of information about different business models in internal audit based on the latest scientific articles from 2019-2021 on the databases JSTOR (https://www.jstor.org/), EBSCHOST (https://search.ebscohost.com/), Oxford Scholarship Online (https://academic.oup.com/) and their graphic visualization. Findings: the article explains the conceptual approaches to the essence of business models of internal audit services. The main components of the internal audit effectiveness model are identified. The main types of internal audit models used by companies have been developed and graphically presented. They are «customized» model, a «outsourced» model and an «insourced» model.