Sunk Cost Fallacy Test: Can You Cut Your Losses?

Do past investments control your future decisions? The sunk cost fallacy is the tendency to continue an endeavor because of previously invested resources — time, money, or effort — even when continuing is no longer the best choice.

Research basis: This educational quiz is informed by decision research on loss aversion and escalation of commitment. It is designed for self-reflection, not diagnosis.

Want to understand the science first?
Read our guide to the Sunk Cost Fallacy →

Live AI Diagnostic

Analyze Your Biases with AI

Describe a recent decision or situation, and our Bias-AI will identify potential cognitive errors.

Diagnostic Result

Answer-First: Rational decision theory says past costs are irrelevant to future decisions — only future costs and benefits should matter. But in practice, humans consistently factor in sunk costs, leading to decisions that compound losses rather than cut them.

The bias is amplified by loss aversion (losses feel more painful than equivalent gains), the desire to appear consistent, and the social stigma of "quitting." Organizations are particularly vulnerable: the larger the past investment, the harder it becomes to stop — producing what researchers call "escalation of commitment."

How This Test Works:

  1. 10 Scenarios: You will be presented with 10 real-world scenarios about how you respond when things you've invested in aren't working out.
  2. Honest Reactions: Go with your gut reaction rather than the answer that seems most rational.
  3. Instant Results: See your sunk cost susceptibility score and what it means for your decision making.

Time required: approximately 5 minutes

Frequently Asked Questions

What is the sunk cost fallacy test?

This test reveals how much past investments in time, money, or effort influence your future decisions. It uses real-world scenarios — investments, relationships, movies, projects — to measure whether you continue things primarily because you've already invested in them, even when stopping would be the better choice.

Why do we fall for the sunk cost fallacy?

Several psychological forces drive it: loss aversion makes losses feel more painful than equivalent gains, so we avoid "realizing" them. The desire to appear consistent makes quitting feel like admitting a mistake. And there's often social pressure — others can see we've committed and quitting feels like public failure.

How can I avoid sunk cost traps and escalation of commitment?

Ask yourself: "If I were starting fresh today with no prior investment, would I begin this?" If the answer is no, you're likely in a sunk cost trap. Evaluate decisions based only on future costs and benefits — past investments are gone regardless of what you decide now.

Is the sunk cost fallacy always harmful?

Not always. Persistence through difficulty is sometimes valuable, and the sunk cost fallacy can provide social benefits — appearing reliable and consistent. The key is being able to distinguish genuine perseverance (based on expected future value) from irrational continuation (based solely on past investment).

Explore More Bias Tests

Discover how other cognitive biases may be affecting your thinking.

Survivorship Bias Test

Do you only see the winners and ignore the failures?

Take the Test →

Anchoring Bias Test

Are your decisions too easily influenced by the first number you hear?

Take the Test →

Availability Heuristic Test

Are your memories and vivid examples misleading your judgment?

Take the Test →

Confirmation Bias Test

Do you seek out information that only confirms what you already believe?

Take the Test →