An estimated 475m people in sub-Saharan Africa have no access to bank accounts

"The surprising fact is Africa’s poor represent a vast reserve of untapped capital waiting to be channeled into consumer and small-businesses loans, and for infrastructure development. By some estimates, 95% of the nearly 500 million adults in sub-Saharan Africa earning less than $10 a day have no access to bank accounts. If they did, the formal banking system could get its hands on as much as $59 billion in new deposits."

Source:  Time, 16th August 2012