Luanda is the most expensive city to live in the African region, and world-wide as at October 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.

Bangui in the Central African Republic is the second most expensive city in Africa. The economy of the CAR is dominated by the cultivation and sale of food crops.

Freetown in Sierra Leone is the third most expensive city in Africa. Freetown is particularly expensive for international education and recreation.

Cairo in Egypt is the cheapest African city.
https://www.xpatulator.com/cost-of-living-article/Africa-Expat-Cost-of-Living-Comparison_711.cfm