Context. The investigation of the actual problem of information technology mathematical models of risk assessment projects regarding the security of their financing, using fuzzy math to various investment entities is done. Development of this technology will allow adequately review the projects; increase the degree of decisions making validity in case of investments and increase economic security and management. Objective of this work is to develop a mathematical model of fuzzy information technology risk assessment for commercial projects regarding the security of their financing. Method. The two-level fuzzy mathematical model to obtain aggregate risk assessment of the project to combine expert opinions in groups criteria in the final assessment and risk project is designed. The set of criteria for risk assessment projects of different origin, which is divided into groups, is formed. The rules of belonging of the resulting term-evaluation for risk criteria groups for the knowledge base building are formulated. The presented model for risk assessment regarding the security of financing for the project, using a systematic approach based on: fuzzy models of the project evaluation, depending on its origin; fuzzy evaluation model of the industries in which commercial project will be implemented and aggregate risk assessment project valuation. Result. The resulting study is the result of the risk assessment model commercial projects regarding the security of their financing, the release of which is linguistic assessment on the proposed project. The rationality of this assessment show the advantages of the model. Conclusions. The paper solved scientific-practical task of development of a mathematical model of information technology for commercial projects risk assessment regarding the security of their financing. The model project evaluation of different origin in conditions of fuzzy expert evaluations based system of fuzzy sets and fuzzy logic. The practical significance of the results, in particular the developed model for risk assessment regarding the security of funding for the project could be implemented in the work of investment and venture funds. The proposed model is a useful tool for increased safety and validity of investment decision-making entities which wish to finance commercial projects of various origins.