African countries are some of the poorest and least developed in the world, with relatively low local cost of living expenses; however the cost of importing and transporting the international standard of goods that expatriates expect to purchase in the cities in this region makes it extremely expensive.

Luanda is the most expensive city to live in the African region, and world-wide as at July 2017. The extremely costly safe expatriate accommodation, imported produce and costly international private schooling are among the main factors that have kept Launda at the top of the rankings in Africa. 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, international private schooling up to US$40 000 a year and the requirement for either a 4×4 to navigate the roads (which are being improved) or for a driver can be costly.
https://www.xpatulator.com/cost-of-living-article/Africa-Expat-Cost-of-Living-Comparison_711.cfm