The publication analyzes the relevance and effectiveness of the use of mathematical modeling methods in modern economics. After all, a single enterprise is a complex dynamic system with diverse and mobile connections between different objects. It is noted that without the use of accurate methods to establish effective, optimal modes of operation of the system is not possible. Therefore, mathematical methods are defined by the apparatus that allows to study complex economic systems. The method of modeling helps to avoid mistakes in the implementation of certain proposals aimed at improving the functioning of systems of interest to the researcher. The author determined that the methods of correlation-regression analysis, methods of factor analysis and main components, methods of comparative analysis are more effective for assessing the level of economic security. The methodology of correlation-regression analysis and its main parameters allows to obtain a fairly large analytical information. The article, based on correlation and regression analysis, forecasts the financial condition of the organization and prepares the basis for the development of recommendations for strengthening the financial condition as a tool that ensures the economic security of the enterprise. Correlation and regression analysis allowed to determine the relationship between the factors and to trace the influence of the factors involved. These indicators are widely used in the processing of statistical data to obtain forecast values of enterprise profits. Carrying out the correlation-regression analysis and having made the forecast of reception of the income from realization for the next four years, negative dynamics of this indicator at the expense of annual increase of the sum of administrative expenses of the organization has been revealed. Operating expenses, in contrast to administrative expenses, have a weak negative dynamics, which will have a positive impact on the company's profit, which will still decrease. It is concluded that it is advisable to introduce measures to increase profits and, accordingly, strengthen the economic security of the State Enterprise "Construction Company UKRBUD".