Purchasing Power Parity: Comparing Salaries Across Countries

What Is Purchasing Power Parity?

Purchasing power parity is a rate that makes two currencies buy the same basket of goods and services. It compares money by local prices instead of by the market exchange rate. That makes it a fair yardstick for living standards.

The World Bank calls a PPP conversion factor both a currency converter and a price deflator. It converts money into a common unit and removes the gap in price levels between countries. That common unit is the international dollar.

An international dollar buys in any country what one U.S. dollar buys in the United States. So the U.S. factor is always exactly 1. In 2024, the household consumption factor for Mexico was about 10.8 pesos per international dollar.

These numbers come from the International Comparison Program, or ICP. It collects prices for matching goods and services around the world. Its latest full price survey covers the year 2021, and the World Bank released those results in May 2024.

Scaling a Salary by Two Price Levels

Our PPP salary calculator uses one short formula. It scales your pay by how much pricier or cheaper the destination is:

Equivalent salary = Salary x (Country B price level / Country A price level)

Country A is where you live now, and country B is where you are looking. The fraction B / A is the cost ratio. A ratio above 1 means country B costs more, and a ratio below 1 means it costs less.

Set one country to 100 as the base and express the other against it. A price level of 120 means the same basket costs 20 percent more. A price level of 50 means it costs half as much.

Building a Price Level From Official Data

A price level index equals the PPP factor divided by the market exchange rate, times 100. Both numbers must be in local currency per U.S. dollar. The result shows local prices with the United States set to 100.

For Mexico in 2024, divide 10.80 by the exchange rate of 18.30 pesos per dollar. You get 0.59, so the price level is about 59. Mexican prices ran at about 59 percent of U.S. prices that year.

Pricing a 60,000 Salary Abroad

Start with the example on our calculator page. You earn 60,000 in country A, where the price level is 100. Country B has a price level of 120, so it costs 20 percent more.

• Cost ratio: 120 / 100 = 1.2.
• Equivalent salary: 60,000 x 1.2 = 72,000.
• Difference: 72,000 - 60,000 = +12,000.

You would need about 72,000 in country B to live as well as you do on 60,000 at home. Now flip it. With a country B index of 50, the ratio is 0.5 and the equivalent falls to 30,000.

The Same Math With Real 2024 Prices

Say you earn 60,000 dollars in the United States and weigh a move to Mexico. Enter 100 for the United States and 59 for Mexico. The ratio is 0.59, so the equivalent is 35,400 dollars.

That answer stays in your own currency, valued at the market exchange rate. At 18.30 pesos per dollar, 35,400 dollars is about 648,000 pesos a year. A salary near that level would roughly match your current buying power.

You can check it a second way. Multiply 60,000 by the PPP factor of 10.80 pesos per international dollar. You land on about 648,000 pesos again, which confirms the index math.

Why Do PPP and Exchange Rates Disagree?

Exchange rates move with trade, investment and market mood, while PPPs track local prices. Many local goods and services never cross a border. So the two rates drift apart, sometimes by half or more.

The table below builds a price level for six economies. It uses the World Bank household consumption PPP factor and the official exchange rate, both for 2024.

Look at India. The exchange rate says one dollar buys 83.67 rupees. The PPP factor says 19.90 rupees buy what one dollar buys in the United States. A straight currency swap misses a price gap of about four times.

Back to the Pesos

Divide 400,000 pesos by 18.30 and you get about 21,850 dollars. Divide by the PPP factor of 10.80 instead and you get about 37,000 international dollars. The second number better shows what that salary buys at home.

Where PPP Salary Math Slips

The formula itself is exact, so errors come from the inputs. Watch for these five problems before you trust a result.

• Mixing index types or years. A 2024 PPP figure for one country and a 2021 figure for the other skew the ratio. Pull both from one source and one year.
• Using GDP PPPs for a paycheck. The GDP factor covers the whole economy, including government and business spending. For salaries, the household consumption factor fits better. Mexico's GDP factor was 9.92 in 2024, not 10.80.
• Ignoring rent and taxes. A national PPP reflects average prices across a whole country. It knows nothing about your rent or your tax bill, and both can swing the result.
• Treating one national number as every city. Prices in a capital run higher than the national average. Our guide to comparing salaries between cities covers that finer step.
• Reading it as take-home pay. The result compares gross pay to gross pay. Net pay depends on each country's tax rules.

When Should You Trust a PPP Comparison?

Trust it as a first filter for offers, moves and remote pay across borders. It tells you whether a salary is in the right range. It does not replace a line-by-line budget for the city you pick.

PPP works best for broad questions. Is a 20 percent raise abroad really a raise? Does a remote rate set in dollars stretch far in a cheaper country? Those answers come quickly from two price levels.

Then narrow the picture with real costs. Price out rent for the actual neighborhood, estimate local income tax, and add moving and travel costs. Offers quoted by the hour need one more step, and our guide to turning hourly pay into a yearly salary shows it.

When you are ready, run both price levels through the purchasing power parity salary calculator. Try the pricier and cheaper cases side by side before you answer an offer.

Common Questions About Purchasing Power Parity

References

This article is general money education, not financial advice. Price levels use World Bank household consumption PPP factors divided by official exchange rates for 2024, rounded to whole numbers. Reviewed for accuracy by Prof. Dr. Khalil Mudassar, PhD. Last updated September 27, 2026.