Definition of opportunity cost

What is Opportunity Cost?

Opportunity cost is the value of the next best alternative that you give up when you make a choice. It is not just the money you spend, but everything you could have had if you had chosen differently.

Formula in LaTeX:
$$OC = \text{value of next best alternative not chosen}$$

Analogy: The Pizza Slice

Imagine you have a pizza and you can either eat one slice or save it for later. If you eat it now, the opportunity cost is the taste and enjoyment you would have had if you had saved it for later. Even though you get the slice now, you lose the future enjoyment. 🍕

Real‑World Example

1. Choosing to study for an exam instead of playing video games.
2. Deciding to buy a new phone instead of saving money for a trip.
3. Opting to work a part‑time job instead of spending time with family.

In each case, the opportunity cost is the benefit you would have received from the activity you did not choose. 💡

Exam Tips for IGCSE Economics 0455

• Always identify the next best alternative when asked about opportunity cost.
• Use the formula: OC = value of next best alternative not chosen.
• Show your reasoning with a clear example or analogy.
• Remember that opportunity cost can be non‑monetary (time, enjoyment, etc.).
• When calculating, consider both explicit and implicit costs.