ESG in banking is the set of environmental, social, and governance factors that banks weigh alongside traditional credit and financial analysis when they lend, underwrite, and invest. Because banks decide where capital flows, an ESG decision at a large bank shapes outcomes well beyond its own balance sheet: which power plants get financed, which neighborhoods get credit, which companies face pressure on their emissions or their boards. That is why ESG in banking carries more weight than in most industries, and why it now sits at the intersection of risk management, disclosure rules, and active political dispute.
The Three Pillars
Environmental
The environmental pillar covers climate change, pollution, resource use, and biodiversity. A bank’s direct footprint from offices and data centers is small. The consequential number is its financed emissions: the greenhouse gases produced by the borrowers, projects, and companies it funds. For large banks, financed emissions dwarf operational emissions by orders of magnitude.
Two distinct climate risks sit inside this pillar. Transition risk is the financial fallout from the shift to a lower-carbon economy: carbon taxes, changing regulation, or falling demand can hit borrowers that depend on fossil-fuel revenue. Physical risk is the tangible damage from extreme weather, which shows up in things like mortgage portfolios in flood-prone areas or agricultural loans in drought regions, where collateral loses value and loan recovery suffers. Both feed into loan-to-value calculations and portfolio construction at most large institutions.
Social
The social pillar covers a bank’s relationships with employees, customers, and communities. In the United States, the Community Reinvestment Act requires federally regulated banks to help meet the credit needs of the communities where they operate, including low- and moderate-income neighborhoods.1Board of Governors of the Federal Reserve System. Community Reinvestment Act Regulators grade each bank’s CRA performance and factor those grades into decisions on mergers, branches, and other applications.2Office of the Comptroller of the Currency. 12 CFR Part 25 – Community Reinvestment Act and Interstate Deposit Production Regulations
Fair lending laws sit alongside CRA. The Equal Credit Opportunity Act prohibits creditors from discriminating on race, color, religion, national origin, sex, marital status, or age, among other protected categories.3The United States Department of Justice. The Equal Credit Opportunity Act The Fair Housing Act adds mortgage-specific protections. Banks also track workforce and management diversity, pay equity, and hiring practices, and increasingly treat data privacy and cybersecurity as material social metrics, since a breach can produce both large penalties and a lasting collapse in customer trust.
Governance
Governance covers the internal controls and accountability structures that keep a bank running honestly. The starting point is board independence: a majority of directors unaffiliated with management and free of material business relationships that could compromise oversight. Executive pay is where governance turns operational. According to 2024 disclosures, more than three-quarters of S&P 500 companies now tie some portion of executive incentive compensation to ESG metrics, which for a bank might mean linking bonuses to a financed-emissions reduction target or community lending commitments. The reasoning is simple: executives paid only on short-term profit have no financial reason to manage long-term sustainability risks.
The pillar also takes in anti-corruption controls, whistleblower protections, transparency of financial reporting, and policies on political lobbying and insider trading. Governance standards apply more strictly to banks than to most industries because a governance failure at a major bank can threaten the broader financial system.
How ESG Shows Up in Bank Operations
Credit Underwriting and Lending
ESG integration begins at the underwriting desk. Banks layer climate risk into standard credit analysis, evaluating a commercial borrower’s exposure to physical risk (is the main facility in a flood zone?) and transition risk (how dependent is revenue on carbon-intensive activity?) over the life of the loan. A borrower with heavy fossil-fuel exposure and no credible decarbonization plan may face tighter covenants or a higher rate.
Sustainability-linked loans push this further. The interest rate adjusts based on whether the borrower hits predefined Sustainability Performance Targets: hit them and the rate falls, miss them and it rises. Adjustments are typically modest, often 5 to 15 basis points per increment, but on a large multi-year loan the incentive is real. Sustainability-linked loans accounted for roughly 72% of global sustainable loan volume in 2024.
Many banks also maintain exclusion lists that draw hard lines around what they will not finance, commonly covering new thermal coal mining projects and certain weapons manufacturing. These lists are enforced through internal audit and risk management.
Capital Markets and Labeled Bonds
On the capital markets side, banks underwrite and advise on labeled bond issuance. Green Bonds finance environmental projects such as renewable energy. Social Bonds fund affordable housing, healthcare access, and similar initiatives. Sustainability Bonds cover both. Global sustainable bond issuance was projected to reach $1 trillion in 2025.
Investment banks help issuers structure these bonds to align with voluntary guidelines like the International Capital Market Association’s Green Bond Principles, which set standards for use of proceeds, project evaluation, and impact reporting.4International Capital Market Association. Green Bond Principles Voluntary Process Guidelines for Issuing Green Bonds Credible green bonds typically carry an external Second Party Opinion validating the environmental credentials before issuance.
Asset Management and Active Ownership
Bank asset management arms offer funds that apply ESG screening. Negative screening excludes certain industries such as tobacco or fossil fuels. Positive screening picks the strongest ESG performers within each sector. Impact investing targets specific measurable outcomes, such as clean water access or microfinance expansion, alongside financial return.
Asset managers also use proxy voting and direct engagement to push portfolio companies on climate disclosure, board diversity, and governance reforms. A bank managing a large equity fund is not just a passive holder; it uses voting power to influence corporate behavior. Shareholder proposal mechanics are governed by SEC Rule 14a-8.
How ESG Performance Is Measured
Measurement is the hard part. ESG accounting is still consolidating, and the framework landscape shifted meaningfully in 2024 when the International Sustainability Standards Board began absorbing several predecessor frameworks.
Reporting Frameworks
The Global Reporting Initiative provides the most widely used sustainability reporting standards, covering the full ESG spectrum and aimed at broad stakeholder audiences.5Global Reporting Initiative. GRI Standards The Sustainability Accounting Standards Board takes a narrower, financially-focused view with industry-specific standards; for banking, SASB specifies metrics on financial inclusion, business ethics, and the integration of environmental factors into credit risk. SASB standards are now maintained by the IFRS Foundation under the ISSB and serve as building blocks for the newer ISSB standards.6IFRS. Understanding SASB Standards
The Task Force on Climate-related Financial Disclosures established a widely adopted climate risk framework built on four pillars: governance, strategy, risk management, and metrics and targets.7Task Force on Climate-Related Financial Disclosures. Task Force on Climate-Related Financial Disclosures In 2024 the Financial Stability Board transferred TCFD monitoring to the ISSB, folding the framework into broader ISSB standards.8IFRS. IFRS Foundation Welcomes Culmination of TCFD Work and Transfer of Monitoring Responsibilities Banks previously reporting under TCFD are now transitioning to the ISSB’s IFRS S1 (general sustainability disclosures) and IFRS S2 (climate-related disclosures), effective for reporting periods beginning on or after January 1, 2024.
Financed Emissions Accounting
The Partnership for Carbon Accounting Financials provides the dominant global methodology for financed emissions. Under the GHG Protocol, loans and investments fall under Scope 3, Category 15. PCAF’s core calculation multiplies an attribution factor (the bank’s outstanding loan or investment amount divided by the borrower’s total equity plus debt) by the borrower’s total emissions.9Partnership for Carbon Accounting Financials. The Global GHG Accounting and Reporting Standard for the Financial Industry The methodology covers six asset classes, including business loans, project finance, commercial real estate, mortgages, motor vehicle loans, and listed equity and corporate bonds. Aggregated across a portfolio, the result gives the bank one number to set targets against and track.
Assurance and the Ratings Problem
Many large banks now hire specialized firms to provide third-party assurance of their ESG data, particularly emissions and social impact figures. External verification helps reduce greenwashing exposure. Some institutions publish integrated reports combining financial and non-financial performance in a single annual filing.
One persistent measurement problem is worth flagging before relying on any single ESG score: the major ratings providers frequently disagree. Academic research has found that ratings from providers such as MSCI, Sustainalytics, and Refinitiv can show low or even negative correlations for the same company. Two agencies can look at the same bank and reach opposite conclusions, because each uses different methodologies, weights, and data sources. A “high ESG score” says as much about the rating agency’s methodology as about the bank being rated.
Where U.S. Regulation Stands
Regulation on ESG in banking has swung sharply in the last two years. Rules that looked settled in 2023 and 2024 have partially reversed in the United States, while international requirements keep tightening.
The SEC Climate Disclosure Rule
In March 2024 the SEC adopted rules requiring public companies, including banks, to disclose climate-related risks and greenhouse gas emissions in registration statements and annual reports on Form 10-K.10U.S. Securities and Exchange Commission. SEC Adopts Rules to Enhance and Standardize Climate-Related Disclosures for Investors The rule would have required disclosure of Scope 1 and 2 emissions and material climate risks affecting strategy and financial condition.11Securities and Exchange Commission. The Enhancement and Standardization of Climate-Related Disclosures for Investors
It never took effect. The SEC stayed the rule after immediate legal challenges, and in March 2025 the Commission voted to end its defense of the rule and withdraw its legal arguments in court.12U.S. Securities and Exchange Commission. SEC Votes to End Defense of Climate Disclosure Rules For now, there is no federal mandatory climate disclosure requirement for U.S. public companies. Many banks continue voluntary disclosure because investors and counterparties still demand the data.
Banking Regulators Pull Back
Federal banking regulators followed a similar path. In October 2023, the OCC, Federal Reserve, and FDIC jointly issued Principles for Climate-Related Financial Risk Management for large financial institutions. By October 2025, all three agencies rescinded those principles. The OCC stated that the agencies “do not believe principles for the management of climate-related financial risk are necessary” and expressed concern that such principles “could distract from the management of other potential risks.”13Office of the Comptroller of the Currency. Risk Management – Rescission of Principles for Climate-Related Financial Risk Management for Large Financial Institutions
The agencies still expect banks to maintain effective risk management appropriate to their size and complexity and to “consider and appropriately address all material risks in their operating environment.”13Office of the Comptroller of the Currency. Risk Management – Rescission of Principles for Climate-Related Financial Risk Management for Large Financial Institutions Climate risk has not disappeared from supervision; it is no longer treated as a standalone category with dedicated guidance. The Federal Reserve conducted a pilot climate scenario analysis with six of the largest banks in 2023, but that program has not been expanded or repeated.14Board of Governors of the Federal Reserve System. Climate Scenario Analysis Exercise Results
Anti-ESG State Laws
In 2025 alone, 10 states passed 11 anti-ESG bills. The laws vary but generally prohibit state entities from doing business with financial firms that “boycott” fossil fuel companies, restrict use of ESG or DEI factors in public pension investment decisions, and in some cases bar proxy advisors from making recommendations based on ESG criteria. Banks operating across multiple states face a patchwork: institutional investors in some states demand robust ESG integration, while state treasurers in others threaten to pull deposits or blacklist firms that consider ESG factors at all.
EU Rules That Reach U.S. Banks
Mandatory ESG requirements continue to expand outside the U.S. The EU’s Sustainable Finance Disclosure Regulation requires financial market participants to disclose how sustainability risks are integrated into investment decisions and to classify products by their sustainability ambitions.15European Commission. Sustainability-Related Disclosure in the Financial Services Sector The EU Taxonomy provides a classification system defining which economic activities qualify as environmentally sustainable.16European Commission. EU Taxonomy for Sustainable Activities U.S. banks with European operations or products sold into the EU must map portfolio activities against the Taxonomy’s technical screening criteria; non-compliance limits their ability to market funds as sustainable within the EU. That creates a practical floor for disclosure that holds whatever happens in U.S. rules.
The Basel Committee on Banking Supervision has also published 18 principles for managing climate-related financial risks, covering governance, internal controls, risk assessment, and reporting.17Bank for International Settlements. Principles for the Effective Management and Supervision of Climate-Related Financial Risks These are designed for national regulators to adapt over time and signal the direction of international banking supervision.
Legal Risks: ERISA and Greenwashing
The ERISA Fiduciary Question
For banks managing retirement plan assets, ESG creates a real legal tension. Under ERISA, plan fiduciaries must make investment decisions based on the financial interests of participants. The Department of Labor’s current rule, finalized in 2022, clarifies that fiduciaries may consider ESG factors like climate change as part of a risk-and-return analysis, but cannot sacrifice returns to pursue social goals.18U.S. Department of Labor. Final Rule on Prudence and Loyalty in Selecting Plan Investments and Exercising Shareholder Rights Non-financial factors can serve only as a tiebreaker between options that are otherwise indistinguishable on financial merits.
That rule is being replaced. The DOL has committed to issuing a new rule, expected by mid-2026, and in January 2026 the House passed H.R. 2988, which would codify a strict pecuniary-only standard for ERISA fiduciaries. If enacted, fiduciaries could consider ESG factors only when those factors demonstrably affect risk or return. The practical effect would narrow when retirement plan managers can incorporate ESG considerations and increase legal risk for banks whose asset management divisions market ESG-themed retirement products.
Greenwashing Enforcement
Regulators are focused on whether banks and fund managers back up ESG marketing with substance. The SEC adopted amendments to its Names Rule in September 2023, requiring investment funds whose names suggest a particular focus (such as “ESG” or “Green”) to align at least 80% of portfolio holdings with the stated objective. Compliance deadlines were extended into 2025 and 2026 depending on fund size. The rule makes it harder to slap an ESG label on a fund that holds essentially the same securities as a conventional index.
Broker-dealers carry their own obligations. Under existing suitability and best-interest standards, firms recommending ESG products must have a reasonable basis for believing those products are appropriate for the customer. Misrepresenting a fund’s ESG characteristics, or recommending an ESG product without understanding what it actually holds, exposes the firm to regulatory action.
The overall pattern is worth holding in mind: the analytical tools for measuring ESG in banking have matured, with PCAF standardizing financed emissions, ISSB standards providing a global disclosure baseline, and sustainability-linked loans creating real financial consequences for missing targets. The political and regulatory ground, especially in the United States, has moved in the opposite direction. Global banks now maintain sophisticated ESG programs to satisfy European regulators and institutional investors while navigating domestic pushback, and that split is the environment any bank operating across borders has to plan for.