In classical economic theory, which deals with the topic of pricing in the conditions of monopolies, the basic assumption is that consumers pay an identical price for each unit of product or service. However, modern market conditions are characterized by price discrimination that occurs when one business entity sells identical goods and services at different prices. Business entities use price discrimination to generate the highest possible revenue from each customer. The main goal of this paper is to identify the forms and levels of price discrimination in modern business practice and to present an elaboration of examples from business practice. In order to realize the goal of the work, a secondary research (“desk research”) was conducted in order to collect appropriate data, which were then selected, presented, analyzed and explained. This research indicates a greater prevalence of certain forms of discrimination, but also the fact that all forms of price discrimination are undesirable, because they violate the rules of market competition.