Freelance workers are an important, but hidden, part of the small business population. This report presents quantitative data on freelancer numbers and their personal and work characteristics. No official, or widely accepted, definition of freelance status exists in the UK. The term ‘freelance’ is not a legal concept but, rather, a customary one used to describe particular kinds of worker or work relationships in particular occupational or industry settings. We define freelancers as genuine business owners without employees working in a range of creative, managerial, professional, scientific and technical occupations.