Once seen as a compliance exercise, sustainable finance most recently is now being recognized as a strategic lever that shapes cost of capital, funding access, and long-term competitiveness. Capital flows into sustainable development routes is an integral part of risk management and value creation. More and more decisions related to investments are being made on the basis of climate-related risks, regulation, and investors’ expectations across the world. For India, the stakes are high. As the world’s sixth-largest economy, with large-scale infrastructure and industrial development taking place, it needs to balance development with transition imperatives. As pointed out by CRISIL, the growth in the country’s GDP is expected to be around 6.5% in 2026, according to S&P Global. The need for achieving net-zero emissions in the country by 2070 and building additional capacity in renewable energy may lead to a need for as much as USD 2.5 trillion in climate finance by 2030. What Sustainable Finance Means Sustainable finance integrates Environmental, Social and Governance (ESG) factors into investment decisions, affecting performance, risk, and value. It includes financing that delivers “green” outcomes, renewable energy, pollution reduction, and transition finance for emissions-intensive yet essential sectors, focusing on measurable improvements over time. It distinguishes initiatives driven by impact intent from those grounded in financially material ESG factors, which affect risk-adjusted returns, cost of capital, and creditworthiness. In India, absent common taxonomies, particularly in coal, steel, and cement, create risks of inconsistent classification, pricing inefficiencies, and investor scepticism. Transparent, outcome-linked approaches are critical. Current State: Signals and Commitments According to the Green Investment Opportunities 2025 Report, total climate sector equity investment in 2024 was at USD 917 million in Sustainable Mobility (48%), Circular Economy (20%), Energy Transformation (19%), while climate-smart agriculture, water technology, and cooling sectors are upcoming Government action anchors confidence. Since 2023, India issued ₹477 billion (USD 5.8 billion) in sovereign green bonds, establishing a domestic green yield curve. SEBI’s independent review mandates from April 2025, RBI’s renewable energy priority sector classification, and ICMA-aligned frameworks have standardised practices. Private participation is rising. By early 2023, India’s green bond market crossed USD 21 billion, over 80% from private issuers, including Yes Bank, Axis Bank, NTPC, and municipal bodies. Sustainability-linked instruments are emerging. For instance, Mindspace Business Parks REIT raised ₹550 crore through sustainability-linked bonds backed by IFC. Programs like the National Solar Mission and FAME illustrate convergence of policy, concessional finance, and private capital; India’s solar capacity surpassed 70 GW by 2023. Energy and infrastructure-linked instruments dominate, while social finance and transition finance evolve gradually. Industrial and municipal deployments: ReNew Power projects, Delhi Metro carbon credit monetisation, Indore Municipal Corporation’s USD 87 million green bond- illustrate adoption beyond power. Scaling capital flows requires deepening transition finance and broadening inclusive instruments. Deployment in Practice Sustainable finance uses two models: use-of-proceeds instruments, earmarked for defined projects, and performance-linked instruments, tying terms to sustainability targets. Use-of-proceeds dominates, supported by SEBI’s ESG debt framework. Beyond green bonds, instruments include social and sustainability bonds, blue bonds, green REITs, climate bonds, and green private equity and venture capital. Banks and NBFCs extend loans for renewable energy and energy efficiency. Performance-linked instruments, such as Sustainability Linked Bonds (SLBs) and Sustainability Linked Loans (SLLs), link pricing or covenants to ESG performance, particularly in energy transition and infrastructure. Blended finance de-risks early-stage segments. The market is shifting toward outcome-focused structures, reflecting investor preference for measurable performance over labels. Drivers of Momentum Momentum stems from investor expectations, trade pressures, national commitments, and regulatory signals. As per reports, around 78% of Indian institutional investors allocate up to 30% of portfolios to entities with measurable ESG objectives, and nearly 40% face client or asset-manager pressure. Over two-thirds of exports are exposed to tightening net-zero regulations in the EU and UK; carbon border adjustments from 2026 may raise costs (Net Zero Tracker, University of Oxford). National commitments, including net-zero 2070 and renewable energy expansion, require USD 1.3 trillion in climate-aligned debt by 2030. SEBI’s BRSR mandates make performance measurable, while reputational considerations increasingly translate into financial risk, linking ESG to capital costs, market access, and competitiveness. Challenges and Way Forward While there is considerable movement toward sustainable finance in India, there are still a number of structural issues faced by sustainable finance, including concerns about credibility. About 68% question corporate ESG claims due to inconsistent reporting and limited verification. Early-stage and MSME firms often lack governance, data systems, and climate risk integration. Multiple global standards (GRI, SASB, TCFD) complicate comparability. Other barriers include absent national taxonomy, high issuance costs, long project gestation, and limited appetite for long-tenor green capital. Strict regulations, investor interest, and the development of ESG capabilities have slowly resulted in outcome-based and transition-oriented financing. Closing Perspective Sustainable finance in India is increasingly tied to competitiveness, resilience, and capital access. It represents a structural shift in financial decision-making. As capital conditions tighten and expectations become explicit, early and credible alignment will distinguish leaders from followers. For India’s growth trajectory, sustainable finance is no longer optional, it is essential. Author - Ashlesha Aggarwal (Executive)