This chapter examines the interplay between financialisation and sustainable growth, emphasising how the increasing dominance of financial motives, institutions, and actors shapes development priorities and outcomes. While financialisation has mobilised significant private capital for sustainability initiatives, it has also introduced trade-offs that risk undermining social equity and long-term environmental resilience. The chapter critically explores the historical evolution of financialisation, its integration into sustainable finance, and the resulting tensions between profit maximisation and development objectives. By framing development challenges as financial problems, financialisation commodifies social and environmental goals, leading to narrow performance metrics, prioritising market-friendly projects, and the potential exclusion of marginalised communities. The chapter also highlights the limitations of financialised models, including their tendency to reinforce structural inequalities, favour highreturn regions, and depoliticise development by prioritising financial over systemic solutions. Key manifestations, such as carbon markets, securitisation of microfinance, and ESG-driven investment instruments, illustrate the dual impact of financialisation—enabling capital flows while limiting inclusivity and transformative equity. The chapter argues that balancing financial efficiency and equitable sustainability requires regulatory safeguards, participatory governance, and a fundamental recalibration of value creation. Blended finance models, stakeholder-driven decision-making, and holistic impact assessment frameworks are essential for aligning financial systems with the broader imperatives of social justice, ecological resilience, and sustainable development.