# The Price of the Road Not Taken

> Opportunity cost, and why every yes quietly costs you the best thing you said no to.

Mental models · 2026-09-28 · by Manas Jain · https://samanar.in/a/opportunity-cost

You win a free ticket to an Eric Clapton concert. You can't sell it. Bob Dylan is playing the same night, and his tickets cost $40. You'd happily pay up to $50 to see Dylan.

What does it cost you to see Clapton?

In 2005, economists Paul Ferraro and Laura Taylor put this exact question to about 200 professional economists. The answer is **$10**: by choosing Clapton, you give up a Dylan night that was worth $50 to you and would have cost $40.

Only about one in five got it right. Most thought the free ticket cost nothing.

## Nothing is free

That missing $10 is **opportunity cost**: the value of the best option you gave up when you chose.

It's easy to miss because it never shows up on a bill. The ticket says ₹0. The price tag is invisible. It lives in the evening you *didn't* have.

Every choice has one, because time, money and attention can only be spent once. Saying yes to one thing is always, quietly, saying no to something else.

## Think of a thali

A thali has a fixed number of katoris. Fill one with a third helping of rice and there's no room left for the dal you actually wanted.

The rice didn't cost extra. It cost you the dal.

## Where you'll spot it

- **An MBA.** The fees are the visible cost. The bigger one is often **two years of salary** you won't earn while you study.
- **Your evening.** An hour of scrolling is also an hour not spent reading, sleeping or calling a friend.
- **Money in a savings account.** Safe, yes. But it also costs you whatever the same money could have earned somewhere else.
- **A company's best engineers.** Put them on feature A, and feature B waits. Every roadmap is a list of opportunity costs.

## Not the same as sunk cost

The two are easy to mix up, but they point in opposite directions.

A **sunk cost** is behind you: money already spent, which shouldn't affect what you do next. An **opportunity cost** is ahead of you: the value you'll give up, which absolutely should.

Good decisions ignore the first and count the second.

## How to use it

When something looks like a good deal, ask: **compared to what?**

Don't compare an option with doing nothing. Compare it with your next-best alternative, and name that alternative out loud. "Is this course worth ₹40,000?" becomes "Is this course worth more than ₹40,000 and the three months of weekends I'd spend on it?"

Sometimes the answer is still yes. But now you're paying the real price, not the one on the ticket.

> Nothing is free. Some things are just paid for with the road you didn't take.