Economics
The Role of Sunk Costs in Business Decisions
Quick fact
The Concorde fallacy, named after the British-French supersonic jet, refers to continuing a failing project because huge amounts have already been spent, even when it's clear the project will never be profitable.
Why this is interesting
Have you ever finished a meal you didn't want just because you paid for it? That's the same mental trap that can lead businesses to pour good money after bad.
Read the full explanation
Understanding The Role of Sunk Costs in Business Decisions
Imagine you buy a non-refundable ticket to a concert, but on the day of the show you feel sick. The money is gone either way—whether you stay in bed or drag yourself out. Since the ticket cost cannot be recovered, it is a sunk cost. Rational decision-making says your choice should depend only on how you feel now: will you enjoy the concert enough to justify the discomfort? The money you already spent doesn't change that. The same principle applies in business. If a company has spent millions on a project that now looks unprofitable, those millions are sunk. They should decide whether to continue based on future expected returns, not on recovering the past investment. The sunk cost fallacy occurs when people let these irretrievable costs sway their decisions, often leading to even greater losses.
A deeper explanation
The underlying principle is rational decision-making based on marginal analysis: consider only the additional future costs and benefits. Sunk costs—money already spent and unrecoverable—are irrelevant to this calculation. The fallacy arises because humans are loss-averse and dislike admitting wasted effort. We also have a natural tendency to be consistent with past decisions (commitment bias). In business, this fallacy can cause companies to persist with failing products, keep outdated equipment running, or continue unprofitable ventures. Recognizing sunk costs helps managers avoid these traps, allocate resources efficiently, and make decisions based on forward-looking data. This concept is foundational to behavioral economics and explains why even experienced executives make irrational choices.