A friendly society is a mutual association for the purposes of insurance, pensions, savings or cooperative banking. It is a mutual organization or benefit society composed of a body of people who join together for a common financial or social purpose. Before modern insurance and the welfare state, friendly societies provided financial and social services to individuals, often according to their religious, political, or trade affiliations. These societies are still widespread in many parts of the developing world, where they are referred to as ROSCAs, ASCAs, burial societies, chit funds, etc.

A benefit society, fraternal benefit society, fraternal benefit order, friendly society, or mutual aid society is a society, an organization or a voluntary association formed to provide mutual aid, benefit, for instance insurance for relief from sundry difficulties. Such organizations may be formally organized with charters and established customs, or may arise ad hoc to meet unique needs of a particular time and place.