Purpose: This study aims to examine the direct effects of job support and the indirect effects of individual career planning on the motivational process of training transfer, which consists of the structural relationship between learning goal orientation, learning motivation, transfer motivation and training transfer. Design/methodology/approach: An online survey was administered to 255 respondents in South Korea, and 252 valid responses were used for analysis. A hypothetical model was examined using a structural equation model and multi-group analysis. Findings: This study found that the synchronous process model of training transfer was well validated in the Korean context; moreover, job support promoted employee motivations that led to their training transfer. In addition, career planning was found to have a moderating role in the relationships explored in this study. That is, when the level of career planning was high, job support directly affected the motivation to transfer, and the link between intrinsic learning orientation and motivation to learn was highly activated compared to the group with a low level of career planning. Research limitations/implications: This study is limited by the single-dimensional measurement of its constructs, including job support, goal orientation and motivation to transfer. This limitation should be considered when interpreting the study's results. In terms of implications, the study suggests that organizations should help individuals identify their career interests and establish a strategy to achieve their career goals by providing information about specific areas of interest. Originality/value: This study proposes that the motivational mechanisms leading to training transfer are affected by trainees' level of career planning. In addition, the study findings emphasize the importance of organizations' role in guiding individual employees' career planning to facilitate performance through training transfer.