The question of the evolution of industrial motivation is a relatively new area of modern research in economic history. Active research on this topic in Russia began in the 1990s, relying mostly on the sources that characterize social aspects of industrial development of the Russian Empire and Soviet Russia of the 1920s – 1930s. The evolution of industrial motivation at the Soviet enterprises did not receive due attention. This article examines one of the key factors of industrial motivation –differentiation of wages based on the archival and published materials of the large oil and gas company “Tatneft”. The subject of this research is the dynamics of wages among various categories of Tatneft employees over the period from 1950s to 1980s. Research methodology leans on the principles of systematicity and historicism, as well as historical-comparative method and statistical analysis. The novelty lies acquisition of new knowledge on one of the crucial factors of incentivization and motivation of employees, as well as in introduction of new archival sources into the scientific discourse. The author concludes on the tendency towards equalize "net" salaries of different categories of employees of the company; however, the analysis of the dynamics of total wages of Tatneft employees taking into account bonuses, indicates a noticeable discrepancy.