This study aims to interpret domestic investment, TPT, and population on the Human Development Index (HDI) in Indonesia for the period 2014-2023 through the lens of Islamic Economics. The method used in this study is a quantitative methodology with secondary data processing in the form of time series sourced from the Central Statistics Agency and analyzed using multiple linear regression through EViews 10 software. The research findings individually indicate that domestic investment and population provide a positive and significant boost to the increase in HDI, while TPT has a counter-productive and insignificant influence on HDI. Overall, all independent variables contribute to the HDI with the contribution of R2 reaching 98.59%. The conclusion of this study confirms that increasing capital and optimizing the population as both the subject and object of development are crucial in boosting the quality of life of the community in line with the principles of sharia development to realize the welfare of the people and achieve falah
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