Many sales presentations rely on a familiar argument. Return on Investment (ROI). The pitch goes, “If you give me a PO, you will get that money back (return on investment) within 10 months – then after that, the savings is additional profit.” The salesperson builds a spreadsheet that shows how their product or service will produce a strong ROI. The numbers look compelling. The expected gains are clear. The logic is straightforward.

Yet very often the customer still doesn’t buy despite a very compelling and quick ROI.

This frustrates many sales and marketing teams because the math appears undeniable. If the return on investment is positive, the decision should be obvious. But the problem is that the argument assumes people make decisions based purely on rational economic calculations. In reality, they don’t.

One of the most influential papers ever written about decision making is Prospect Theory: An Analysis of Decision under Risk, written by psychologists Daniel Kahneman and Amos Tversky. Their work fundamentally changed how economists understand human decision making. Before this research, most economic thinking relied on Expected Utility Theory. This theory assumes that people evaluate choices rationally by calculating expected outcomes. If one option produces a higher expected return than another, a rational decision maker should choose it. Most ROI arguments in business are built on this assumption.

But Kahneman and Tversky showed that this is not how people actually make decisions. Through a series of experiments, they demonstrated that individuals evaluate choices relative to their current situation and that losses have a much stronger psychological impact than gains. In other words, losing something hurts far more than gaining something of equal value feels good. This concept is known as loss aversion, and it has enormous implications for how business decisions are made.

Consider how a typical ROI argument sounds to a business owner. A salesperson might say, “If you invest $60,000 in this program, you could generate $200,000 in additional revenue.” From a purely rational perspective, this looks like a strong investment. But the business owner does not experience the decision in those terms. Instead, the owner sees a potential loss of $60,000 today and a possible gain in the future that is uncertain. Because losses feel more painful than gains feel rewarding, the psychological weight of the possible loss dominates the decision. This explains why many ROI-based sales arguments fail.

They emphasize the upside of a decision while ignoring the emotional reality that people are primarily trying to avoid losses. Prospect Theory also shows that people evaluate decisions relative to a reference point, which is usually their current situation.

If a company is currently operating and surviving, even if growth is slow, the owner’s reference point is stability. Any proposed change that introduces risk is perceived as a potential loss relative to that stable position. This is why many companies continue operating in familiar ways long after the market has changed. The status quo feels safe.

Understanding this psychological dynamic changes how sales and marketing should be approached. Instead of focusing primarily on projected returns, it is often more effective to help decision makers understand the losses they may already be experiencing.

In many technical industries today, buyers search online for suppliers before contacting them. Companies that appear in those searches receive inquiries from potential customers. Companies that do not appear simply never see those opportunities. From a behavioral perspective, this reframes the decision entirely. The question is no longer whether a marketing investment might generate additional revenue. The question becomes whether the company may already be losing opportunities it never even knew existed.

That shift is powerful because it aligns with how people actually evaluate risk. Instead of asking a business owner to gamble on future gains, the conversation helps them recognize potential losses that may already be occurring. This insight does not come from clever marketing tactics. It comes from understanding how human decision making actually works. The research of Kahneman and Tversky revealed that decisions are rarely driven by spreadsheets alone. They are shaped by psychology, by perceptions of risk, and by the natural human tendency to avoid losses. When sales and marketing strategies align with these realities, conversations become clearer and decisions often become easier.

And sometimes the most valuable insight is simply recognizing that the problem was never the math in the ROI spreadsheet. It was the assumption that people make decisions the way economists once believed they should.