In 1986, The Economist invented a joke that stuck. If a Big Mac is the same burger everywhere, then its price in different countries can be used as an informal measure of whether a currency is over- or undervalued. The magazine called it "burgernomics". Forty years later, the Big Mac Index is still one of the most widely quoted (and copied) pieces of economic humour with a serious point.
The idea in one paragraph
Economists have a theory called purchasing-power parity: in the long run, exchange rates should move until an identical basket of goods costs the same everywhere. A Big Mac is a convenient "basket of one" — same recipe, same ingredients, same production process, sold in dozens of countries. If a burger costs $6 in the US and the equivalent of $3 in another country at the market exchange rate, the index says that country's currency is undervalued by about half.
The 2026 spread
Depending on which edition and data set you use, the 2026 numbers line up like this. Switzerland has the most expensive Big Mac, at roughly $8–9 (one tracker puts it at $9.08 against $6.12 in the US, another at $7.99 in a July snapshot). Uruguay, Norway, Sweden and the UK are all above the US price too. At the other end, Taiwan comes in cheapest, at about $2.4–2.5 — some 60% below the US price — with most of the cheapest burgers in Asia (Egypt is the exception).
Note that exact figures differ between trackers because prices, exchange rates and update dates differ; the shape of the ranking — Switzerland and Nordic countries at the top, Asian markets at the bottom — is what stays consistent.
What the price gap means
A price gap does not mean a burger is "unfair" somewhere. It means one of two things: either the currency is out of line with what a dollar buys locally, or the burger is priced by local realities that have nothing to do with currency.
- Wages. A Big Mac is assembled by people. In a country with high wages, the labour cost inside a $9 burger is much higher than in a country with low wages. This is the most common reason rich countries look "overvalued".
- Rent and taxes. Real estate, sales tax and VAT are baked into the price.
- Imports. Beef, packaging and energy costs vary a lot across markets.
The Economist knows this, which is why it also publishes a GDP-adjusted version that compares burger prices with what you would expect for a country at that income level.
Why it still matters
Because it makes an abstract idea concrete. Travellers instantly understand why Zurich feels expensive and Taipei feels cheap; the index turns that feeling into a number. And it is a reminder that an exchange rate on a screen and what your money buys on the ground can be far apart.
The Big Mac Index is not a forecasting tool. It is a way to ask the right question — is this currency worth what the market says it is? — using the one product you can walk into a restaurant and buy in dozens of countries on the same day.
