Universal basic income (UBI) is a social welfare proposal in which all citizens of a given population regularly receive a minimum income in the form of an unconditional transfer payment, i.e., without a means test or need to work. In contrast a guaranteed minimum income is paid only to those who do not already receive an income that is enough to live on. A UBI would be received independently of any other income. If the level is sufficient to meet a person's basic needs, it is sometimes called a full basic income; if it is less than that amount, it may be called a partial basic income. As of 2024, no country has implemented a full UBI system, but two countries—Mongolia and Iran—have had a partial UBI in the past. There have been numerous pilot projects, and the idea is discussed in many countries. Some have labelled UBI as utopian due to its historical origin.

Welfare, or commonly social welfare, is a type of government support intended to ensure that members of a society can meet basic human needs such as food and shelter. Social security may either be synonymous with welfare, or refer specifically to social insurance programs which provide support only to those who have previously contributed, as opposed to social assistance programs which provide support on the basis of need alone. The International Labour Organization defines social security as covering support for those in old age, support for the maintenance of children, medical treatment, parental and sick leave, unemployment and disability benefits, and support for sufferers of occupational injury.