The Sunk Cost
Calculator
The Trap: You stay in a bad relationship because "we've been together 5 years." You keep funding a failing business because "I've already spent $50k."
This is the Sunk Cost Fallacy. Your brain values past loss more than future gain. This calculator removes the emotion and forces you to look at the math.
Why You Can't Quit
Human beings are "Loss Averse." We feel the pain of losing $100 twice as intensely as the joy of finding $100. This biological bug makes us throw good money after bad.
The Golden Rule: The money you spent is already gone. It is ash. The only question that matters is: "Is the future investment worth the future reward?" If the answer is No, you must cut the cord immediately.
Rationality Database (FAQ)
What is the Sunk Cost Fallacy?
It is the cognitive bias where a person continues a behavior or endeavor as a result of previously invested resources (time, money, or effort), even if the future outcome is negative.
Examples of Sunk Cost?
1. Finishing a boring movie because you paid for the ticket.
2. Repairing an old car that costs more than buying a new one.
3. Staying in a career you hate because you spent 4 years studying it.
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