Imagine you're selling a used car. You wouldn't price it based on what you originally paid for it years ago. You'd look at what similar cars are selling for right now. You'd consider its condition and find a reasonable price that a knowledgeable buyer would be willing to pay, assuming you're not in a rush to sell. This everyday scenario is very close to the concept of fair value in accounting.

This formal definition has a few key ingredients. First, it's an exit price. It’s about the price you’d get when selling an asset, not the price you’d pay to buy it.

Second, it assumes an orderly transaction. This means the sale isn't a fire sale. The seller isn't being forced to sell immediately at a deep discount. There's a normal marketing period to find a willing buyer.

Third, the transaction is between market participants. These are buyers and sellers who are independent, knowledgeable, and acting in their own economic best interest. It’s not a special deal between related parties.

Finally, it's tied to a specific measurement date. Fair value is a snapshot. The fair value of an asset on December 31st might be different from its value on January 1st.

Traditional accounting often uses historical cost, which is what a company originally paid for an asset. While simple, historical cost can become outdated quickly.

A company might own a building it bought in 1980 for $100,000. On the books, that's its value. But in today's market, that building could be worth $2 million. Fair value provides a much more relevant and up-to-date picture of the company’s financial position. It helps investors and lenders understand what the company's assets and liabilities are actually worth today.

Fair value also improves comparability. When two different companies report the value of similar assets using market-based prices, investors can make a more meaningful, apples-to-apples comparison between them. This transparency is vital for making sound investment decisions.

To ensure everyone measures fair value consistently, the International Accounting Standards Board (IASB) created IFRS 13, Fair Value Measurement. Before IFRS 13, the guidance for fair value was scattered across many different standards, leading to confusion. IFRS 13 consolidated everything into a single framework.

It doesn't decide when to use fair value. Instead, it explains how to measure it when another IFRS standard requires or permits it. Think of it as the official dictionary and instruction manual for fair value.

Now that you have a grasp of the basics, we'll move on to how fair value is actually determined.