The Census Bureau calls these businesses nonemployer firms.
According to data for 2007 (the most recent available):
Real Estate Appraisers: 19%
Software Publishers: 14%
Bed and Breakfast Inns: 8%
Carpet and Upholstery Cleaning Services: 8%
Nail Salons: 16%
Landscape Architectural Services: 15%
Clothing Accessories Stores: 13%
Confectionery and Nut Stores: 6%
Most of the money earned by nonemployer firms comes from, in order of size:
- Real Estate Services,
- Professional, Scientific and Technical Services, and
They are often part-time ventures with owners operating more than one business at a time. The most recent recession has hit the real estate market and construction industry particularly hard so this data may change.