India Faces $6.5 Trillion Financing Gap in $22.7 Trillion Push to Net-Zero by 2070: NITI Aayog

India will require $22.7 trillion in cumulative investment to achieve net-zero greenhouse gas emissions by 2070, according to a study by government think tank NITI Aayog, with a financing gap of roughly $6.5 trillion expected to persist even after accounting for a substantial scale-up in domestic capital mobilisation — a finding that continues to shape India's climate finance conversations well into September 2026, as noted in Uniqus's latest Sustainability & Climate Pulse briefing.

The study, titled "Scenarios towards Viksit Bharat and Net Zero: Financing Needs," found that while India could credibly mobilise around $16.2 trillion for its net-zero transition through a structural expansion in the scale, depth and efficiency of available capital, a financing gap of $6.53 trillion would remain — a gap NITI Aayog said is expected to be met largely through external sources, raising the share of international capital in India's total climate financing needs to 42 percent by 2070, up sharply from 17 percent in 2022-23.

"International capital, particularly concessional finance and grants, will therefore be critical to supporting technologies essential for net zero that are not yet commercially viable," the report said, underscoring the outsized role foreign capital is expected to play in financing frontier decarbonisation technologies that remain too early-stage for purely commercial investment.

The financing gap is not static: NITI Aayog's analysis shows it growing from approximately $2.5 trillion by 2050 to $6.5 trillion by 2070, signalling the rising cost of decarbonising hard-to-abate sectors in the decades after 2050. The power sector accounts for the largest share of this gap, at 82 percent, driven by the scale of investment needed for renewable energy integration, grid upgrades, long-duration energy storage and emerging clean technologies. Industry accounts for a further 13 percent of the gap, reflecting capital-intensive decarbonisation needs in steel, cement and chemicals, while transport accounts for the remaining 5 percent — a comparatively smaller but still significant share given rapid demand growth and ongoing technology shifts in the sector.

On an annualised basis, meeting India's net-zero investment needs would require climate finance flows to rise from an estimated $135 billion in 2024 to approximately $450 to $500 billion per year, with roughly $8 trillion of total investment needing to be front-loaded by 2050, including nearly $5 trillion dedicated to the power sector alone. The report characterises India's financing requirement as "stage-sensitive," noting that mature technologies such as solar and wind require primarily scale-up capital, while frontier solutions such as green hydrogen and carbon capture, utilisation and storage remain dependent on grants and blended finance to become commercially bankable.

The scale of the task is] immense and unprecedented," said India's Chief Economic Adviser V Anantha Nageswaran, while emphasising that the bulk of resources would still need to be generated domestically through stronger savings, higher investment levels and continued job creation. NITI Aayog's report adopts what it terms a "development-first" framework for reaching net-zero, arguing that India's GDP could expand nearly elevenfold by 2070 — reaching an estimated $30 trillion by 2047, in line with the government's Viksit Bharat goal — while total final energy demand would rise only 2.1 to 2.6 times relative to 2025 levels, provided the country achieves significant gains in energy efficiency, electrification, material circularity and behavioural change.

To help close the gap, NITI Aayog's report proposes a series of institutional and regulatory reforms, including the establishment of a National Green Finance Institution to de-risk emerging technologies, aggregate green assets and provide first-loss guarantees intended to "crowd in" private institutional capital; finalisation of a National Climate Finance Taxonomy to harmonise rules and prevent greenwashing across the financial system; and deepening capital markets by reorienting pension and insurance fund portfolios toward green assets and growing the corporate bond market to 30 percent of GDP by 2070.

The findings arrive as global sustainability reporting frameworks continue to consolidate and tighten more broadly, a trend Uniqus's September 2026 Sustainability & Climate Pulse briefing frames as running in parallel with capital-side developments such as India's financing gap and the Gulf region's shift from broad climate commitments toward more concrete green licensing and firmer national emissions targets.

For international investors, development finance institutions and multilateral lenders, India's clearly quantified financing gap — and its explicit call for a rising share of international capital — offers one of the more detailed public roadmaps globally for where large-scale climate finance could be deployed over the coming decades, spanning power-sector renewables, industrial decarbonisation and early-stage frontier technologies alike.