Usage-Based Pricing Transfers Cost Uncertainty From Vendors to Customers

Usage-based pricing, common in SaaS and AI products, charges customers based on actual consumption such as API calls or compute time, rather than a fixed fee. While vendors benefit from revenue that scales predictably with usage, customers must now accurately forecast their own consumption or face surprise bills. Usage spikes are often triggered by bugs, misconfigurations, or unplanned traffic surges — scenarios that generate extra costs without delivering extra value to the customer. Under flat pricing, vendors would have absorbed such variability through averaged-out tier pricing, shielding customers from these fluctuations. The unpredictability also creates organizational friction, complicating budget planning and straining finance teams even when the underlying product is performing well.