Bayes Business School, formerly known as Cass Business School,is the business school of City, University of London, located in St Luke's, just to the north of the City of London. It was established in 1966, and it is consistently ranked as one of the leading business schools in the United Kingdom.

Bayes Business School is divided into the three faculties of actuarial science and insurance, finance, and management.It awards BSc (Hons), MSc, MBA and PhD degrees and is one of around 100 schools globally to be triple accredited by the AMBA in the United Kingdom,EQUIS in Europe,and the AACSB in the United States.