Small businesses are normally privately owned corporations, partnerships, or sole proprietorships. What businesses are defined as "small" in terms of government support and tax policy varies depending on the country and industry. Small businesses range from 15 employees under the Australian Fair Work Act 2009, 50 employees according to the definition used by the European Union, and fewer than 500 employees to qualify for many U.S. Small Business Administration programs. Small businesses can also be classified according to other methods such as sales, assets, or net profits.
Small businesses are common in many countries, depending on the economic system in operation. Typical examples include: convenience stores, other small shops (such as a bakery or delicatessen), hairdressers, tradesmen, lawyers, accountants, restaurants, guest houses, photographers, small-scale manufacturing, and online businesses, such as web design and programming, etc.
Researchers and analysts of small or owner-managed businesses generally behave as if nominal organizational forms (e.g., partnership, sole-trader or corporation) and the consequent legal and accounting boundaries of owner-managed firms are consistently meaningful. However, owner-managers often do not delineate their behaviour to accord with the implied separation between their personal and business interests. Lenders also often contract around organizational (corporate) boundaries by seeking personal guarantees or accepting privately held assets as collateral. Because of this behaviour, researchers and analysts should reject the relevance of the organizational types and implied boundaries in many contexts relating to owner-managed firms. These include analyses that use traditional accounting disclosures, and studies that view the firm as defined by some formal organizational structure.