REVISITING TAX HAVENS IN THE ERA OF CLIMATE FINANCE: IMPLICATIONS FOR BASE EROSION AND SUSTAINABLE DEVELOPMENT

Abstract

The proliferation of tax havens has long undermined the fiscal capacities of nations striving to achieve sustainable development. In an era where climate finance demands unprecedented mobilization of public and private resources, the erosion of tax bases through offshore financial mechanisms poses a fundamental threat to sustainable economic governance. This chapter critically examines the structural relationship between base erosion, profit shifting, and the financing gaps that hinder the realization of climate-responsive development agendas. Drawing on international fiscal frameworks and empirical evidence from developing economies, it argues that aggressive tax avoidance strategies divert capital flows that would otherwise fund green infrastructure and climate adaptation programmes. The chapter further explores how multilateral tax cooperation mechanisms, including the OECD's BEPS framework, intersect with sustainable finance architectures. It contends that without meaningful reform of global tax governance, the ambitions enshrined in the Paris Agreement and the UN Sustainable Development Goals will remain structurally underfunded. Special attention is given to the disproportionate vulnerability of low-income nations, whose development trajectories are acutely sensitive to illicit financial outflows. The chapter proposes an integrated policy framework that aligns tax transparency obligations with climate finance accountability standards. It concludes that repositioning tax justice as a pillar of sustainable development finance is not merely a fiscal imperative but a moral and ecological necessity. Ultimately, closing the gap between tax governance reform and climate finance mobilization represents one of the defining policy challenges of the twenty-first century.