Scholarly research in Muslim societies has often credited Islamic charity institutions such as vaqf or zakat as the main financial resources of governmental/non-governmental welfare programs for underprivileged members of the society, since these institutions often serve as a safety net for the society. However, although Islamic charities have been gaining scholarly attention following the 9/11 attacks, to date, ethnographic research of welfare charity organizations across the Middle East, including non-governmental and non-political organizations, remain limited. This ethnographic research on Kahrizak Foundation and Kahrizak Charity Care Center based on 24 months participant observation provides a new perspective on the role of private faith-based charity organizations in contemporary Iran. This paper contributes to our understanding of modern care/rehabilitation centers that frame and often justify their activities in religious terms, and the impact of their faith-based activities on those involved with the organization as volunteers, residents, and organizers. It argues that the presence of a charismatic leader, personal ties to prominent figures, and response to donors’/volunteers’ religious motivations based on personal experiences were among the key factors that led to the development of non-governmental faith-based charity organizations in Iran. Significantly, the aspirations for faith-based activities of the volunteers of the Center are internally driven, rather than institutionally motivated. This paper also argues that the success and influence of Kahrizak’s emphasis on faith-based activities served as a model for other organizations to follow suit. Kahrizak Foundation, which administrates Kahrizak Charity Care Centers for elderly and disabled residents in Tehran and Karaj, is a prominent example of successful non-governmental organization in the field of nursing care in Iran. The most distinct contribution of this Foundation was a creation of a management method for fully equipped modern care/rehabilitation centers by combining faith-based activities with volunteer caring efforts. The volunteers working in the Charity Care Center interpret their practice of caring for others through the concepts of redemption and afterlife based on Shia Islam, and the Foundation has been actively harnessing human power of these faith-based volunteer workers for the benefit of improving the care quality for the residents since its establishment in 1972. The Foundation and the Charity Care Center became famous in Iran, and enjoyed growing influence on welfare policies last couple of decades.