What Investors and Lenders Should Ask Data Centre Companies About ESG

Sustainable debt tied to data centres has more than doubled since 2023, according to Bloomberg Intelligence, yet most green financing frameworks reviewed by ISS anchor eligibility in a single efficiency metric. A label that tests one number can leave power security, water and community risk untested.

The pressure on asset value is real. Energy constraints, water stress, policy change and customer decarbonisation demands all affect data centre cash flows and financing risk, and capital providers need questions that reach those drivers.

This article argues that ESG due diligence on data centres should test asset resilience, not check a label, and it sets out the questions that connect ESG indicators to uptime, permits, operating cost and exit value.

Capital reaches data centres through green loans and bonds, where proceeds are earmarked for projects with environmental benefits, and through sustainability-linked loans, where the interest rate depends on meeting targets. For data centres those targets usually relate to power usage effectiveness (PUE), water usage effectiveness or renewable energy sourcing, and there is no standard set of indicators.

Labels are not the same as resilience. An ISS review of twelve green finance frameworks linked to data centre bond issuance found that most anchor eligibility in PUE, and it warned that energy-only criteria can overlook issues such as water. A Natixis CIB survey, as summarised by ISS, found that investors increasingly weigh PUE, renewable energy use and water, and do not treat the sector as green by default.

Lenders' core concerns remain traditional ones. A September 2026 Ashurst note lists technology obsolescence, concentration, power dependency and construction risk as the principal credit risks, and says ESG-linked covenants must be legally sound and achievable for the borrower.

In India, the framework is still forming. Efficiency standards from the Bureau of Indian Standards are voluntary, no national data centre policy has been notified, BRSR applies only to listed companies in the top 1,000, and data centres are not among the sectors covered by the carbon market today.

ESG due diligence on data centres is most useful when it tests whether the asset can keep running, keep its permits and keep its customers. Labels describe intent, while evidence describes resilience.

As AI infrastructure absorbs more capital, the investors who ask for site-level evidence on power, water and community acceptance will price risk earlier than those who rely on certifications.