A small business (also called mom-and-pop) is a business that is privately owned and operated, with a small number of employees and relatively low volume of sales.

Small businesses are normally privately owned corporations, partnerships, or sole proprietorships. The legal definition of "small" varies by country and by industry, ranging from fewer than 15 employees under the Australian Fair Work Act 2009, 50 employees in the European Union, and fewer than 500 employees to qualify for many U.S. Small Business Administration programs.