The economy of the Democratic Republic of the Congo, a nation endowed with resources of vast potential wealth, has declined drastically since the mid-1980s. The two recent conflicts (the First and Second Congo Wars), which began in 1996, have dramatically reduced national output and government revenue, have increased external debt, and have resulted in deaths of more than five million people from war, and associated famine and disease. Foreign businesses have curtailed operations due to uncertainty about the outcome of the conflict, lack of infrastructure, and the difficult operating environment. The war has intensified the impact of such basic problems as an uncertain legal framework, corruption, inflation, and lack of openness in government economic policy and financial operations. Malnutrition affects approximately two thirds of the country's population. Conditions improved in late 2002 with the withdrawal of a large portion of the invading foreign troops. A number of International Monetary Fund and World Bank missions have met with the government to help it develop a coherent economic plan, and President Joseph Kabila has begun implementing reforms. Much economic activity lies outside the GDP data. A United Nations Human Development Index report shows human development to be one of the worst in decades.

The Congo is the world's largest producer of cobalt ore, and a major producer of copper and industrial diamonds. It has significant deposits of tantalum, which is used in the fabrication of electronic components in computers and mobile phones. In 2002, tin was discovered in the east of the country, but, to date, mining has been on a small scale. Smuggling of coltan and cassiterite, the ores of tantalum and tin, respectively, has helped fuel the war in the Eastern Congo. Katanga Mining Limited, a London-based company, owns the Luilu Metallurgical Plant, which has a capacity of 175,000 tonnes of copper and 8,000 tonnes of cobalt per year, making it the largest cobalt refinery in the world. After a major rehabilitation program, the company restarted copper production in December 2007 and cobalt production in May 2008.