Opportunity Cost
Opportunity cost is the value of the next best alternative you give up.
About this topic
Opportunity cost is the value of the next best alternative that you give up when you make a choice. If you spend Saturday working for $60 instead of going to a concert you would have enjoyed, the concert, or its worth to you, is your opportunity cost. It is not the sum of all alternatives, only the single best one you passed up.
The idea shows that nothing is truly free, because time and money always have other uses. A free ticket still costs the evening you spend using it. Opportunity cost can be measured in money, time or other goods. A farmer who plants wheat on a field gives up the corn that could have grown there, so the corn is the cost of the wheat.
Worked example: you have 2 hours and can either study for a test, which might raise your grade by 5 points, or play a game you value at about the same as 3 points. Studying has the higher payoff, and the game is the cost. Businesses use it too when deciding whether to expand a shop or invest the money in new equipment. Governments weigh it when choosing between a hospital and a highway.
Common mistakes: counting every option you rejected instead of just the best one, and forgetting hidden costs such as time. Also, money already spent and cannot be recovered, a sunk cost, should not affect the decision. Tip: always ask what is the next best thing I could do with these resources.
Key ideas
- Time and money both have costs
- Compare benefits to costs
- Explains many decisions
Quick check
Use cases: where Opportunity Cost helps
- Homework: review the key idea behind Opportunity Cost before you start a problem set.
- Exam revision: use the quick check to test whether you can recall Opportunity Cost without notes.
- Visual learning: play with the interactive lab to see how Opportunity Cost changes when you adjust its inputs.
- Teaching a friend: explain Opportunity Cost in your own words, then compare your version with the key ideas.
Economics explains prices, jobs, budgets and government policy in daily life.
Frequently asked questions
What is Opportunity Cost?
Opportunity cost is the value of the next best alternative you give up.
What will I learn in Opportunity Cost?
Time and money both have costs. Compare benefits to costs. Explains many decisions.
Is Opportunity Cost part of Economics & Money?
Yes. It is one of 30 Economics & Money topics on LearnViz HighSchoolEdu, with 3 key ideas, a live animation and a quick check.
Does the Opportunity Cost lab work on a phone or tablet?
Yes. The animation resizes to fit your screen and supports touch, so you can drag, tap and slide with your finger.
How should I study Opportunity Cost?
Read the summary and key ideas first, play with the interactive lab to see the idea in motion, then answer the quick check. If you get a question wrong, go back to the key idea it tests.
Do I need an account, and is my progress saved?
No account is needed. Marking a topic as learned is saved in your own browser, so it stays on that device and is not sent to a server.