Purpose of research: scientific grounding of the theoretical statements and development of practical recommendations on improving accounting and control of company's transaction costs. Object of research: transaction costs of manufacturing firms and processes of their accounting and control. Subject of research: theoretical, organizational, and methodical issues of accounting and control of company's transaction costs. Methods of research: dialectical method, system approach, cause and effect relations, abstract and logical method, observation, comparison, analysis, dynamics and graphic method, induction, deduction, analogy, generalization and specification, modeling method.Scientific novelty of the results obtained lies in the grounding of the theoretical statements and development of practical recommendations on improving organization and methods of accounting and control of transaction costs at manufacturing firms as a basis for increasing the efficiency of business entity's activity management. The main statements of scientific novelty of the results obtained lie in the following: for the first time the issues as follows have been obtained: complex approach towards accounting reflection of transaction costs by all types of company's activity has been worked out, which provides the control of their appearance and assists in decreasing of such kind of costs and increasing of the efficiency of business entity's activity; the issues have been improved as follows: accounting system in the part of distinguishing objects formed under the influence of institutional theories (institutions' theory, ownership theory, contracts' theory, firms' theory, transaction costs theory), which enables to recognize transaction costs as an object of accounting and control; classification of transaction costs (by nature; possibility of being reflected in accounting; relative to business entity; economic expediency; types of activity; stages of contractual process; kind of contract; number of transactions) for creating the system of analytical accounting, which enables to increase the accuracy and completeness of informational support of the management process; organization of accounting for transaction costs in the part of detecting places of their appearance and responsibility centers, grounding of the necessity of transaction costs' costing while purchasing and selling of company's assets, which forms the information basis of transaction costs' management; organizational and methodical support of internal control over transaction costs in the part of determining levels and stages of its carrying out, constituents, directions of identification and research of the deviations from transaction costs, which assists in complexity and timeliness of applying measures of internal control over transaction costs, intensification of control over activity costs' formation as well as increasing quality of accounting data; The following issues undergone further development: content of the concepts "transaction", "transaction costs", which assists in forming the unified approach to transaction costs as an object of accounting and control; composition of internal accounting reporting on company's costs (in the part of the necessity of presenting statements STC-1 "Statement of transaction costs for management", STC-2 "Statement of transaction costs of contractual process", STC-3 "Statement of transaction costs of non-effective negotiations", SCC "Consolidated statement on company's costs"), which assists in meeting information needs of users of various management levels. Implementation extent: research results have been implemented into the practice of PLC "Bevers", public company "Galiivsky maslozavod named after V.F. Mazurkevych", group of companies "Planeta", PLC "Iultis". Separate research results have been implemented in the educational process of Zhytomyr State Technological University while teaching "Managerial Accounting", "Financial Accounting-2", "Reporting of Enterprises" and "Organization of Internal Control".
