The weighted average cost of capital (WACC) is used to estimate the profitability of the company's capital, the rate of return of the investment project and business. Within the framework of the article, an analysis of the methods for calculating the weighted average cost of capital of a company was presented. It was found that the existing methods are not suitable for all Russian companies. In this regard, it was proposed to use two versions of the capital asset pricing model (CAPM): with the calculation of the beta coefficient by comparing the dynamics of ROE and the RTS index, as well as the dynamics of ROE and prices for raw materials or produced products. Models were evaluated on the example of PJSC Koks, which is one of the largest producers and exporters of metallurgical coke in Russia. During the analysis, it was concluded that it is advisable to use both WACC calculation models.