The sunk cost fallacy is a common cognitive bias that can lead to irrational decision making. It occurs when people continue to invest in a situation, even when it is no longer beneficial, because of the resources they have already invested. This can lead
In economics and business decision-making, a sunk cost is a cost that has already been incurred and cannot be recovered. Sunk costs are contrasted with prospective costs, which are future costs that may be avoided if action is taken. In other words, a sunk cost is a sum paid in the past that should no longer be relevant to decisions about the future. Even though economists argue that sunk costs are no longer relevant to future rational decision-making, people in everyday life often take previous expenditures in situations, such as repairing a car or house, into their future decisions regarding those properties.