Investment in Indonesia has been growing, especially among the younger generation. According to data from KSEI, more than 50% of Indonesian investors are under the age of 30. This data proves that investment has become a common phenomenon among young Indonesians, particularly millennials and Generation Z, which can be attributed to various factors. This research aims to identify the relationship between independent variables affecting investment, namely attitude, motivation, perception, and emotion, on investment decisions. This study uses a quantitative method with purposive sampling and is processed using SPSS 26. The population used in this study is accounting students from the Faculty of Economics and Business, Universitas Tanjungpura. The respondents tested in this study numbered 55. It was found that, partially, there is a significant positive influence of emotion on investment decisions; however, there is no significant positive influence from attitude, motivation, and perception on investment decisions. Simultaneously, there is a significant positive influence of attitude, motivation, perception, and emotion on investment decisions. Investment decisions are influenced by 38.2% of the variables tested in this study.