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HomeBlogSkill Building & Careers
Skill Building & Careers

Sunk Cost Fallacy: What It Is and How It Costs You Money

The sunk cost fallacy is continuing with something because of what you already spent. Learn the money examples and how to decide with future value in mind.

The Teyro TeamOct 26, 20261 min read
On this page6 sections
  1. Direct answer
  2. Everyday examples
  3. How to break the habit
  4. Where Teyro fits
  5. The bottom line
  6. More guides

Money already spent is gone. Only the next decision is yours.

Direct answer

The sunk cost fallacy is staying with a choice because of what you have already spent, even when it no longer makes sense. The money or time cannot be recovered whatever you decide, so the sensible question is what gives the best result from now on.

Everyday examples

  • Eating food you dislike because you paid for it.
  • Keeping a gym membership you never use.
  • Repairing an old car again and again because of past repair bills.
  • Staying in a course you hate because you paid the fee.

How to break the habit

  1. Ask the fresh-start question: "If I were deciding today with no past spending, would I do this?"
  2. Compare future costs and benefits only.
  3. Accept the loss and move on.
  4. Set stop points before starting big projects.

Where Teyro fits

Teyro's Needs vs. Wants: Making Better Spending Decisions course turns this into short lessons you can play in a few minutes a day. It has 50 lessons, and you can start free.

The bottom line

You cannot get the past money back, but you can protect the future money.

This is general education, not personal financial advice.

More guides

  • Delayed Gratification
  • Discretionary Spending
  • Essential Expenses
  • Opportunity cost
  • Buyers remorse
  • Needs vs. Wants: Making Better Spending Decisions course

Frequently asked questions

What is the sunk cost fallacy?

It is the mistake of continuing something because you have already invested time or money, even when stopping would be better.

What is an example of a sunk cost?

Finishing an expensive meal you do not enjoy, or keeping a gym membership you never use because you already paid.

How do I avoid it?

Ask, "If I had not already spent this, would I choose it now?"

Learn it by playing

Needs vs. Wants: Making Better Spending Decisions turns this into short, playable lessons. Free to start.

See the Needs vs. Wants: Making Better Spending Decisions course

Free to start · No credit card needed

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Written by

The Teyro Team

Learning Team at Teyro

We build Teyro — an AI-powered learning platform that turns skill-building into a daily habit through bite-sized, gamified lessons. We write about the learning science and study strategies that shape our product.

More from The Teyro Team

On this page

  • Direct answer
  • Everyday examples
  • How to break the habit
  • Where Teyro fits
  • The bottom line
  • More guides

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