Purpose: The purpose of this paper is to investigate the relationship between social learning constructs and perceived learning performance in corporate informal Web-based learning environments. The study aims at providing significant implications for corporate educators who have worked on designing social learning environments in the workplace. Design/methodology/approach: To identify the casual relationship of the proposed research model, data collected from 523 South Koreans who were corporate employees and social media users were analyzed using structural equation modeling. Findings: The results indicate that self-motivation, learning community and social media usage were significantly related to perceived learning performance. In addition, social media usage mediated the relationship between the other social learning constructs and the learning performance. Originality/value: Given that corporate personnel typically gain job-related knowledge and skills through social learning, corporate educators need to provide learners with social learning environments that are conducive to self-motivation and learning community. Social media, when used as a learning tool, might not sufficiently improve learning performance without the help of other social learning constructs. Findings shed light on which social learning constructs are essential to effective social learning environment design in the workplace.