This article contains the theoretical foundations of procrastination in terms of irrational personality beliefs, as well as the results of empirical research, including methods for investigating irrational beliefs as cognitive predictors of procrastination. The purpose of this study was to study the causes of procrastination in the Kazakhstani sample using methods specially selected and adapted to the Kazakh language, taking into account cultural characteristics. This study has revealed the structural relationships between the cognitive, behavioral, and emotional components of procrastination and the extent to which a combination of these components explains procrastination. Most previous studies that have examined the causal factors associated with procrastination have focused on limited dimensions or variables of procrastination. Thus, it is expected that the present study will expand on previous studies by examining a more complete set of cognitive, behavioral, and emotional components, where a special role is given to irrational personality beliefs as a cognitive predictor of procrastination. The study analyzed modern conceptual approaches to understanding procrastination and irrational beliefs, uncovered the content of underlying cognitive phenomena, and identified procrastination in people with different levels of irrational beliefs.