<p>Incivility in the workplace refers to the violation of business standards, etiquette and ethics and is considered a global problem affecting the psychological condition and health of employees. Despite research indicating that 98% of employees across various industries have experienced workplace incivility in one form or the other, there is a notable scarcity of literature addressing the crucial issue. This study aims to investigate the determinants of workplace incivility, based on affective events theory and the social interactionist perspective. for this purpose, a total of 26 universities were targeted, yielding 419 questionnaires from educational institutions employees. Structural equation modeling (SEM) was employed to uncover the determinants of workplace incivility, while multi-criteria decision-making (MCDM) method was used to classify the universities exhibiting the highest levels of workplace incivility. SEM results revealed significant effects of work environment, work events, personal conflict, and personal cooperation on affective reactions, with affective reactions and disposition performing mediating and interactive roles. MCDM results provided insight into universities most likely to engage in workplace incivility. This study provides first hand evidence for academicians and practitioners, highlighting the significance of institutional policies in mitigating the workplace incivility. The findings offer crucial insight for industry seeking to understand the determinants of incivility and identify organizations at risk of engaging in toxic workplace behaviour.</p>