The Diploma Thesis deals with the problems of an estimate of the discount rate and the single parameters used especially in the two basic methods for its determination: the surcharge (premium) method and the CAPM model. In the first part there are presented the effects which influence the discount rate and thus also the method of its estimate. The second part of the thesis describes the surcharge (premium) method which includes an estimate of the riskfree rate, the risk premiums and the liquidity premium. The third part of the work is devoted to the CAPM model, and it is divided into two chapters. Firstly, the CAPM model is derived in chapter 3. Then, in chapter 4, there are presented the possibilities of estimate of its single parameters and premiums which are most frequently added to the basic CAPM model.