Which force in Porter’s Five Forces framework is primarily concerned with customers who could switch to substitutes?

• A. Threat of substitutes
• B. Bargaining power of suppliers
• C. Bargaining power of buyers
• D. Industry rivalry

Answer: (A)

The threat of substitutes explains why customers might switch to different products or services that satisfy the same need. When viable substitutes exist, buyers compare value, price, and performance across options and can switch if a substitute offers better overall value, which puts downward pressure on prices and overall profitability for the industry. This force comes from external alternatives outside the current industry, not from the firm’s existing competitors, suppliers, or buyers. For example, streaming services can substitute for traditional cable, or coffee can substitute for tea, depending on price and quality. In contrast, bargaining power of buyers focuses on how much customers can push for concessions, bargaining power of suppliers on input costs, and industry rivalry on competition among existing firms. The key idea is the potential for customers to switch to substitutes, which drives competitive pressure.