What the study found
ESG controversies significantly reduce banks' cost efficiency by increasing non-interest expenses. The size of this effect depends on the institutional context, and higher baseline ESG performance appears to help buffer the impact.
Why the authors say this matters
The authors conclude that ESG failures have measurable financial consequences for banks. The study suggests that institutional quality and digital engagement shape how well banks can manage ESG-related reputational shocks.
What the researchers tested
The researchers studied data from the world's largest banks and used stochastic frontier analysis, a method for estimating how far institutions are from best-possible efficiency. They examined how ESG controversies, institutional conditions, baseline ESG performance, and digital visibility relate to operating costs.
What worked and what didn't
ESG controversies were associated with lower cost efficiency and higher non-interest expenses. Banks in the European Union or in countries with strong rule of law and regulatory quality experienced smaller cost increases, while banks under highly effective government structures faced stronger cost pressures. Higher baseline ESG performance improved cost efficiency and acted as reputational insurance, and greater digital visibility was linked to marginally higher operating costs but to ESG reputation recovery.
What to keep in mind
The abstract does not describe specific limitations beyond the scope of the data and methods used. The findings are reported for the world's largest banks, so the summary is limited to that sample.
Key points
- ESG controversies were linked to lower cost efficiency in banks.
- The main mechanism reported was higher non-interest expenses.
- The effect was smaller in the European Union and in countries with stronger rule of law and regulatory quality.
- Higher baseline ESG performance helped protect cost efficiency and support reputational recovery.
- Greater digital visibility was linked to slightly higher operating costs.
Disclosure
- Research title:
- ESG controversies raise banks’ operating costs
- Authors:
- Emilia Klepczarek, Agata Wieczorek, Wiktor Wojciechowski
- Institutions:
- University of Łódź, University of Humanities and Economics in Lodz, SGH Warsaw School of Economics
- Publication date:
- 2026-03-08
- OpenAlex record:
- View
Get the weekly research newsletter
Stay current with peer-reviewed research without reading academic papers — one filtered digest, every Friday.


