This study examines the practice of transformative da'wah (Islamic outreach) conducted by the Smart Home Foundation among waste pickers in Makassar. Using a qualitative case study approach, the research explores three main dimensions: the form and process of mentoring, social impact, and the fundamental urgency of transformative da'wah in a marginalized urban context. The findings indicate that transformative da'wah is implemented through three integrated domains. First, religious-social initiatives include charitable programs (e.g., sharing on Fridays), regular Islamic study sessions, and parenting seminars. Second, a holistic educational approach is developed through a Qur'anic literacy program and the establishment of the Dream Islamic School, which covers early childhood education through boarding school. Third, economic empowerment is pursued through social enterprises such as Smart Laundry and private tutoring services. The impact of these initiatives is evident across various dimensions. Beyond these empirical findings, this study advances the scholarship of contemporary da'wah by proposing an integrative model of transformative da'wah that systematically connects religious guidance, holistic education, social empowerment, and economic sustainability within a unified Islamic framework. This model extends the conventional understanding of da'wah from a predominantly normative and ritual activity to a multidimensional paradigm of social transformation, thereby enriching contemporary Islamic thought on da'wah as an instrument of human development and community empowerment. Practically, the findings provide strategic insights for da'wah institutions, NGOs, zakat organizations, and policymakers in designing sustainable, community-based, and empowerment-oriented programs for marginalized populations