The Federation of Small Businesses (FSB) is a UK business organisation representing small and medium-sized businesses. It was formed in 1974 as the National Federation of Self Employed (NFSE). The current name for the organisation was adopted in 1991. It is registered with Companies House as The National Federation of Self Employed & Small Businesses Limited (company number 1263540).
FSB is a member-led, not-for-profit and non-party political organisation. FSB is a lobbying organisation representing small firms and the self-employed to UK, national, local and devolved government. FSB offers its members a range of benefits, such as a 24-hour legal advice line and free business banking.