It is increasingly recognised that a vital role in the provision of water and sanitation services is played by small service providers (SSPs). These come in many forms, including private sector suppliers, community-based organisations (CBOs), and households as self-providers. While many different measures are necessary to strengthen their role in service delivery, one constraint emphasised in several studies is their lack of access to credit or other appropriate financing mechanisms and products. This book gives examples of how various existing financial mechanisms and products are being used to finance water and sanitation projects and small local businesses and gives a quick overview how to write a successful business plan.