This study aims to examine the relationship between religious compliance measured through official Islamic Religious Education (PAI) indicators and sharia investment decision-making among urban communities in Bandar Lampung. The research uses a quantitative associative method with a sample of 384 Muslim residents aged 18-60 years. Data were collected using questionnaires and analyzed with correlation and simple linear regression tests. The results show a strong, positive, and significant relationship between religious compliance and sharia investment decisions (r = 0.724; p < 0.05), with sharia muamalah understanding being the most influential dimension. Religious compliance contributes 52.4% to investment decision variations, while the remaining portion is influenced by other factors. This study confirms that religious values serve as a core moral compass in economic choices, and fills the research gap in Southern Sumatra regarding this specific topic.
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