High Quality Content by WIKIPEDIA articles! Karachi is referred as the financial capital of Pakistan; it accounts for a lion`s share of Pakistan`s revenue generation. It generates approximately 53.38% of the total collections of the Federal Board of Revenue, out of which 53.33% are customs duty and sales tax on imports. Karachi produces about 30 percent of value added in large scale manufacturing and 20% of the GDP of Pakistan. In February 2007, the World Bank identified Karachi as the most business-friendly city in Pakistan. In 2010, research by the global human resources company Mercer found Karachi to be the cheapest city in the world.