AbstractThe escalating impacts of climate change—rising sea levels, intensified extreme weather events, and slow-onset environmental degradation—are inflicting irreversible losses and damages, particularly in vulnerable countries with minimal historical responsibility for greenhouse gas emissions. This paper examines the economics of loss and damage through the lens of distributive justice, focusing on the critical question: Who pays for climate injustice? Drawing on empirical evidence, climate finance mechanisms, and international policy debates, the study analyzes the economic dimensions of loss and damage, distinguishing it from adaptation and mitigation finance. It explores the disproportionate economic burdens faced by Least Developed Countries (LDCs) and Small Island Developing States (SIDS), where climate-induced shocks erode GDP, undermine livelihoods, and exacerbate poverty traps. The analysis critically evaluates the emerging Loss and Damage Fund agreed upon under the UNFCCC framework, assessing its potential to operationalize the "polluter pays" principle, address financing gaps, and ensure timely and equitable compensation. The paper also interrogates the political economy of climate negotiations, highlighting the tension between historical emitters and climate-vulnerable states and the challenges of assigning liability in a fragmented international legal landscape. By integrating perspectives from climate economics, international law, and development studies, the research argues that sustainable and just financing requires binding commitments from high-emission nations, innovative funding mechanisms such as climate taxes and debt swaps, and the recognition of loss and damage as a standalone pillar of climate action. Ultimately, the study contends that resolving the "who pays" question is not only an economic necessity but also a moral imperative to rectify deep-rooted climate inequities.