In modern conditions, a number of factors affect the activities of enterprises, which include a tough competitive environment, limited material resources, and the economic crisis caused by the COVID-19 pandemic. To improve its efficiency, it is necessary to minimize the costs of manufacturing products, performing work and providing services. Effective and rational internal control contributes to the solution of this task. In this regard, issues related to the organizational and methodological support of control over production costs are of particular relevance. The research was carried out in order to study organizational aspects and develop directions for improving the methodological support of internal control of production costs. As one of the internal control tools, it is advisable to use the internal control working document (ICWD) “Test for assessing the accounting system of production costs”, which allows you to collect information on the validity and reliability of accounting for production costs and calculating the cost of production; on the procedures used in the system of internal control over production costs and the effectiveness of these procedures; on the general principles of organizing the primary, synthetic and analytical accounting of production costs, on the rationing of material resources at the enterprise. To systematize the information collected during the internal control of primary accounting, the ICWD “Checking the primary accounting of production costs” is suitable. Using the ICWD developed within the framework of the study “Checking compliance with the norms of consumption of material assets in production”, it is possible to establish the validity of material costs and generalize the results of checking the norms of inventories for production. For internal control of work-in-progress, it is proposed to use the ICWD “Questionnaire for assessing the organization and accounting of inventory of work in progress”.