One-third of Americans are freelancers now

Independent contractors (21 million). This group hews closest to our “traditional” idea of freelancing: individuals whose main source of employment involves working on a project-to-project basis in their field. They make up about 40 percent of freelancers.
Moonlighters (14.3 million). These are individuals who work regular full-time jobs and also do some amount of freelance work. This group includes 27 percent of freelancers.
Diversified workers (9.3 million). These are our serious hustlers, the folks pulling in income from multiple sources, including traditional employment and freelance work. A diversified worker may have a 20-hour per week bartending or retail job and supplement her income with freelance graphic design work and some time as an Uber driver. This group makes up about 18 percent of freelancers.