While Singapore is being hailed as the best place in the world for expatriates to live in, another new study has come up with the world’s most expensive cities for the same group of people.

Mercer’s annual Cost of Living survey places Luanda, Angola, as the most expensive city for expatriate employees, where a one-bedroom apartment in the city centre can set you back $3,500 per month, and a pair of jeans could reportedly cost you more than $240.

While it may come as a surprise that Luanda would trump Paris, New York or London, all of which frequently make the top three in lists of the most pricey cities, this is the third consecutive year Luanda has been placed at number one.

The reason for this has been attributed to Angola’s oil industry, which accounts for half of the country’s global GDP.

The most expensive cities in the world 2015 Show all 10 1 /10 The most expensive cities in the world 2015 The most expensive cities in the world 2015 1. Grand Cayman, Cayman Islands The largest island in the Cayman Islands group, Grand Cayman is the most expensive city in the world to live in David Rogers/Getty Images The most expensive cities in the world 2015 2. Zurich, Switzerland Switzerland's largest city, Zurich, takes the number two spot FABRICE COFFRINI/AFP/Getty Images The most expensive cities in the world 2015 3. London, United Kingdom The British capital of London is the third most expensive city in the world Chris Jackson/Getty Images The most expensive cities in the world 2015 4. Geneva, Switzerland One of three Swiss cities to appear in the top 10, Geneva is the world's third most expensive city Mike Hewitt/Getty Images The most expensive cities in the world 2015 5. New York City, USA The Big Apple is the fifth most expensive city in the world Afton Almaraz/Getty Images The most expensive cities in the world 2015 6. San Francisco, USA San Francisco, on the other side of the country, comes one place behind NYC Ezra Shaw/Getty Images The most expensive cities in the world 2015 7. Washington, DC, USA America's seat of power, Washington, DC, is the 7th most expensive city Brendan Hoffman/Getty Images The most expensive cities in the world 2015 8. Bern, Switzerland The Swiss capital is the 8th most expensive city in the world FABRICE COFFRINI/AFP/Getty Images The most expensive cities in the world 2015 9. Hong Kong The city-state of Hong Kong is the ninth most expensive city in the world PHILIPPE LOPEZ/AFP/Getty Images The most expensive cities in the world 2015 10. Singapore Another city-state, Singapore, edges in to the top 10 most expensive cities in the world ROSLAN RAHMAN/AFP/Getty Images

"As the global economy has become increasingly interconnected, close to 75% of multinational organizations are expecting long-term expatriate assignments to remain stable or increase over the next two years," said Ilya Bonic, President of Mercer’s Talent business. "Sending employees abroad is necessary to compete in markets and for critical talent."

The top 10 most expensive cities for expatriates are as follows:

1) Luanda, Angola

2) Hong Kong, China

3) Zurich, Switzerland

4) Singapore, Singapore

5) Geneva, Switzerland

6) Shanghai, China

7) Beijing, China

8) Seoul, South Korea

9) Bern, Switzerland

10) N'Djamena, Chad