Interest-free banking has long been explored as a more ethical, equitable, and socially responsible alternative to conventional finance. Yet a central question remains: Can a modern banking system be both sustainable and fully aligned with Islamic principles while operating without profit-driven lending? This book presents a compelling answer through the innovative concept of social banking-a non-profit, interest-free model designed to reinforce economic justice and eliminate the structural risks that fuel indebtedness. The model is built on Islamic financial principles and uses zakat funds, asset-backed transactions, and clear risk-sharing methods to ensure that financial stability is achieved without compromising ethical values.. Through rigorous analysis, historical insight, and econometric modelling, the book demonstrates how a non-profit banking structure can remain financially viable, socially impactful, and resilient in today's complex economic environment. Forward-looking and deeply grounded in scholarly research, this work offers policymakers, academics, and practitioners a practical roadmap for designing an interest-free banking system that is both sustainable in the long term and firmly rooted in Islamic values.