Abstract This study examines the implementation of halal certification in Micro, Small, and Medium Enterprises (MSMEs) in Indonesia, specifically at the Azwar Refillable Drinking Water Depot, using the Input-Process-Output-Outcome (IPOO) analytical framework integrated with the perspectives of business feasibility studies and the halal industry economy. Through a descriptive qualitative approach involving field observations and unstructured interviews, it was found that the Free Halal Certification (SEHATI) program from BPJPH has successfully eliminated cost barriers that have long been the primary obstacle for SMEs. Halal certification has proven to enhance consumer trust and strengthen business competitiveness, which are key indicators in the aspects of market viability and socio-economic feasibility. The IPOO framework systematically outlines how regulations (Input) trigger the certification process (Process), resulting in formal recognition (Output), and ultimately leading to increased consumer trust and competitive advantage (Outcome). This study affirms that inclusive halal regulations can drive the development of the halal industry from the grassroots level, while also providing a strong foundation for comprehensive and sustainable business feasibility studies. Keywords: Halal Industry Economics, Business Feasibility Studies, MSMEs, Halal Certification, IPOO, Competitiveness, Business Sustainability