Corporate ESG Performance, Greenwashing, and Bank Loan Contracting: Evidence from Taiwan

In the world of business, money does not flow randomly; it follows a path of trust. When a company needs to borrow cash to build a factory or expand its operations, it turns to banks. For decades, bankers have looked primarily at a company's financial health—its profits, its debts, and its ability to pay interest—to decide how much to lend and at what cost. However, a new layer of trust has been added to this ancient relationship: the company's behavior toward the planet and its people. This behavior is measured by a set of standards known as environmental, social, and governance, or ESG. The "environmental" part tracks how a company treats nature; the "social" part looks at how it treats workers and communities; and "governance" examines how honestly and fairly it is run. As governments and societies demand more responsible business, a critical question has emerged for the financial world: do these good deeds actually make a company cheaper to borrow from, or are they just expensive distractions?

A team of researchers from National Taipei University set out to answer this question by looking at the real-world lending practices of banks in Taiwan. They examined data from nearly two thousand listed companies between 2020 and 2024, a period when the Taiwanese government was actively pushing financial institutions to support green initiatives. The researchers did not just look at whether companies claimed to be green; they dug deep to see if those claims matched reality. They analyzed thousands of loan contracts to see how the terms changed based on a company's ESG score. Their work reveals that banks are indeed rewarding good behavior, but they are also becoming sophisticated enough to spot companies that are merely pretending.

The study found that companies with stronger, genuine ESG performance generally receive better loan terms. When a company demonstrates a real commitment to sustainability, banks respond by lowering the interest rate they charge, offering larger loan amounts, and requiring less collateral. It is as if the bank is saying, "We trust you more, so we will lend to you more easily." This effect is not uniform across all types of good behavior, however. The research showed that banks are most impressed by strong corporate governance—the rules and transparency that prevent managers from acting in their own self-interest. While environmental and social efforts also help, their impact varies more depending on the specific situation. For instance, a company with excellent governance but weak profits might still get a lower interest rate, but the bank might shorten the length of the loan to keep a closer watch on the situation. This suggests that banks view good governance as a reliable shield against risk, even when a company's financial numbers are shaky.

Perhaps the most striking discovery in the paper is that banks can tell the difference between a company that is truly sustainable and one that is just talking a good game. The researchers separated a company's ESG score into two parts: the willingness to disclose information (how much they talk about their efforts) and the quantifiable performance (what they actually do). They found that only the actual performance lowers the cost of borrowing. If a company talks a lot about being green but does not back it up with real action, banks do not reward them. In fact, the opposite happens. When a company's disclosure outpaces its actual performance—a gap the researchers call a "greenwashing" score—banks react by tightening the terms. They charge higher interest rates, lend smaller amounts, shorten the loan duration, and demand more collateral. This indicates that lenders are not easily fooled by marketing; they have developed the ability to detect inconsistencies between a company's public promises and its private conduct.

The study also highlights how the financial landscape is changing under government pressure. Since 2017, Taiwan's financial regulators have launched a series of action plans to direct capital toward net-zero emissions. The data shows that these policies are working: banks are increasingly integrating ESG factors into their decisions. Yet, the research uncovers a subtle side effect. When rules force companies to report more on their sustainability, many companies rush to improve their reporting first because it is easier to do than to change their actual operations. This creates a temporary widening of the gap between what companies say and what they do. The researchers suggest that while mandatory reporting increases transparency, it also gives companies a chance to exaggerate before they can truly improve. This makes the role of the bank as a detective even more important. By penalizing the gap between words and deeds, banks are effectively enforcing a standard of honesty that goes beyond the written rules.

Ultimately, this research paints a picture of a lending market that is maturing. It is no longer enough for a company to simply claim it is sustainable. The banks are looking for substance. They are using ESG data not just as a moral checklist, but as a practical tool to measure risk. A company that manages its resources well, treats its stakeholders fairly, and governs itself transparently is seen as a safer bet, deserving of cheaper money. Conversely, a company that tries to hide its true impact behind a wall of glossy reports will find the door closing tighter. The findings suggest that the path to sustainable finance is not just about encouraging good behavior, but about building a system where good behavior is the only way to get a fair price for borrowing.