There is a vast potential market for retail financial services among low-income clients, and a growing number of commercial banks have successfully entered this market. These are the findings of recent research undertaken by CGAP, the global resource center for microfinance supported by a syndicate of 30 multilateral, bilateral, and private donors. Microfinance is the category of financial services offered to lower-income people, where the unit size of the transaction is usually small (“micro”), typically lower than the average GDP per capita, although the exact definition varies by country.