The article is aimed at analyzing modern approaches to management of IT projects and revealing the possibilities for their improvement based on the use of fuzzy logic in the overall decision-making circuit. Based on the analysis of the main rating sites, a conclusion has been made about the powerful development of IT outsourcing in Ukraine. The main international and domestic ratings regarding the Ukrainian IT outsourcing market are analyzed, criteria of success and reasons for rapid development are allocated. Upon analyzing a sufficient number of works and materials, the authors generalized, synthesized and classified the main difficulties that arise in the process of developing a portfolio of IT projects in terms of outsourcing companies. The most common instruments used to overcome these difficulties are analyzed. Focus is set on the Stage-Gate framework as the most appropriate for both adaptation and use in the process of managing the portfolio of outsourcing IT projects. A modification of Stage-Gate framework is proposed, which takes into account peculiarities of managing outsourcing IT projects and uses a fuzzy logic apparatus for decision-making when navigating between stages of the framework. The purpose of the modification is the possibility to create on its basis an expert system to support decision-making in the process of managing the portfolio of projects. This, in turn, leads to an overall increase in the level of project portfolio management. Prospects for further research are the introduction of the expert system into the practice of work of domestic IT outsourcing firms. The parallel direction consists in analyzing the international IT outsourcing market. This will help to increase the efficiency of the proposed modification and provide favorable conditions for the integration of the Ukrainian IT outsourcing market into the international practices.