The top ten most expensive countries in the world as at April 2018 comprise two from Africa Angola (1); Central African Republic (7), three from Europe Norway (2); Switzerland (4); Denmark (6), four from America Bermuda (3); Cayman Islands (5); Bahamas (9); Montserrat (10), and one from Asia Pacific Japan (8).
Angola is the most expensive country in the world for expatriate professional migrants mainly because almost all international standard goods and services have to be imported, as a result there are price premiums due to demand constantly exceeding supply. The extremely costly safe expatriate accommodation, imported produce and costly international private schooling are among the main factors that have kept Angola at the top of the world rankings. A rented house in a guarded community (recommended due to the threat of violent crime) can cost between US$8 000 and US$12 000 per month.
https://www.xpatulator.com/cost-of-living-article/The-Most-Expensive-Countries-in-the-World-for-Expatriate-Professional-Migrants_717.cfm