The top 10 most expensive cities in the world as at January 2019 are as follows:
Singapore is the most expensive city in the world for Expatriate’s to live. Singapore’s education system, is also the most expensive for expatriates when priced in US Dollars, the cost of housing is also extremely high due to the limited space and premium on high quality expatriate accommodation, while the complex Certificate of Entitlement system makes car prices excessive, resulting in Singapore’s transport costs being among the highest in the world.
Hong Kong is the second most expensive city due to the very high cost of housing and healthcare, as well as the strong Hong Kong dollar which is fixed against the US Dollar.
Luanda in Angola is the third most expensive city in the world for expatriate professional migrants to live. Everything in Luanda is expensive as almost all international standard goods and services are imported.
For more: https://www.xpatulator.com/cost-of-living-article/International-City-Cost-of-Living-for-Expatriate-Professional-Migrants_716.cfm