The Dangers of Sunk Cost Fallacy

Sunk cost fallacy is one of the most destructive traps in business decision-making because it disguises itself as being responsible.

Conversations shaped by sunk cost fallacy often sound like:

• “We already spent so many months on it.”

• “We can develop workarounds.”

• “We’re too far in to change direction now.”

These always sound reasonable in the moment, but they delay progress in reality.

I often write about iteration but something often overlooked is how difficult it feels to move on from past versions. Trying something new can feel like throwing away your hard work - even though you learned from the experience.

Here’s the thing about time and effort: you spend them whether you want to or not.

They are finite and always moving. You can’t harbor on how you spent them in the past. The only question that actually matters is whether today’s decisions improve tomorrow’s outcomes.

Strong business decisions don’t honor past investments. They honor today’s constraints and tomorrow’s opportunities.

Anyone protecting an old decision because changing it would force a harder conversation?