Behavioral finance as a branch of behavioral economics entails the rationality of an individual’s investment decisions. This suggests how crucial it is that an investor’s financial capability is aligned with their financial literacy as every investor possesses different risks depending on their income, lifestyle, and risk appetite. The capability of an investor to absorb and assume investment risks also comes with age and this research focuses on the purpose of analyzing the correlation of behavioral finance that impacts the investment decisions to an individual’s income, lifestyle, and risk appetite. This study may also be utilized by investment institutions to manage their strategies to center investments for those individuals who are indeed capable to invest yet does not. Since this research rationalizes how income, lifestyle, and risk appetite impact the sustainable investment decisions among 22-30year old, investment products can be tailored by investment institutions that may further contribute to financial inclusion in the Philippines. The researchers adopted a purposive sampling method with a quantitative research approach which employs a Likert Scale technique to obtain data from one hundred (100) working adults aging from 22 to 30 years old. Furthermore, multiple linear regression was utilized to assess the correlation between independent variables (income, risk appetite, and lifestyle) and dependent variables (investment choice, market outcomes, and trends). The results show that behavioral finance has a significant influence on the process of an adult’s investment decision-making. Through this study, it was proven that the individual’s financial literacy along with behavioral finance exhibited a strong indicator of an individual’s capability to invest.