By UN classification South Africa is a middle-income country with an abundant supply of resources, well-developed financial, legal, communications, energy, and transport sectors, a stock exchange (the JSE Limited), that ranks among the top twenty in the world, and a modern infrastructure supporting an efficient distribution of goods to major urban centres throughout the entire region. South Africa is ranked 20th in the world in terms of GDP (PPP) as of 2007.

Advanced development is significantly localised around four areas: Cape Town, Port Elizabeth, Durban, and Pretoria/Johannesburg. Beyond these four economic centres, development is marginal and poverty is still prevalent despite government efforts. Consequently the vast majority of South Africans are poor. However, key marginal areas have experienced rapid growth recently. Such areas include Mossel Bay to Plettenberg Bay; Rustenburg area; Nelspruit area; Bloemfontein; Cape West Coast; and the KwaZulu-Natal North Coast.

Even though South Africa has the seventh highest per capita income in Africa, only behind Libya, Mauritius it suffers from large income gaps and a dual economy marking it as a developing country. South Africa has one of the highest rates of income inequality in the world. A decade of continual economic growth has helped to lower unemployment, but daunting economic and social problems remain. The average South African household income decreased considerably between 1995 and 2000. As for racial inequality, Statistics South Africa reported that in 1995 the average white household earned four times as much as the average black household. In 2000 the average white household was earning six times more than the average black household.[31] The affirmative action policies have seen a rise in black economic wealth and an emerging black middle class.[32] Other problems are crime, corruption, and HIV/AIDS.

At the start of 2000, then President Thabo Mbeki vowed to promote economic growth and foreign investment by relaxing restrictive labour laws, stepping up the pace of privatisation, and cutting unneeded governmental spending. His policies face strong opposition from organised labour. South Africa is also the largest energy producer and consumer on the continent. South Africa is a popular tourist destination, and a substantial amount of revenue comes from tourism.[33] Among the main attractions are the diverse and picturesque culture, the game reserves and the highly regarded local wines.

The South African rand (ZAR), is the most actively-traded emerging market currency in the world. It has joined an elite club of fifteen currencies, the Continuous linked settlement (CLS), where forex transactions are settled immediately, lowering the risks of transacting across time zones. The rand was the best-performing currency against the United States dollar (USD) between 2002 and 2005, according to the Bloomberg Currency Scorecard.

The volatility of the rand has affected economic activity, falling sharply during 2001 and hitting a historic low of 13.85 ZAR to the USD, raising fears of inflation, and causing the Reserve Bank to increase interest rates. The rand has since recovered, trading at 7.13 ZAR to the dollar as of January 2008. However, as exporters are put under considerable pressure from a stronger domestic currency, many call for government intervention to help soften the rand.

Refugees from poorer neighbouring countries include many immigrants from the DRC, Mozambique, Zimbabwe, Malawi and others, representing a large portion of the informal sector. With high unemployment levels amongst poorer South Africans, xenophobia is prevalent and many people born in South Africa feel resentful of immigrants who are seen to be depriving the native population of jobs, a feeling which has been given credibility by the fact that many South African employers have employed migrants from other countries for lower pay than South African citizens, especially in the construction, tourism, agriculture and domestic service industries. Illegal immigrants are also heavily involved in informal trading.[34] However, many immigrants to South Africa continue to live in poor conditions, and the South African immigration policy has become increasingly restrictive since 1994.[35]

Principal international trading partners of South Africa — besides other African countries — include Germany, Japan, Switzerland, the United Kingdom, and the United States. Chief exports include corn, diamonds, fruits, gold, metals and minerals, sugar, and wool. Machinery and transportation equipment make up more than one-third of the value of the country’s imports. Other imports include chemicals, manufactured goods, and petroleum.