The current social security systems in Europe have not been able to deal with increased traditional and new risks such as unemployment or work-life balance. One suggested solution to this problem has gained more popular and academic support in recent years: the idea of a universal, unconditional basic income (UBI). This study, therefore, examines whether and how UBI could support social security systems in the UK, Germany and Sweden in order to achieve their aims and fulfill their functions. Since effectiveness and efficiency describe the functionality of social security systems, the study