A Small business is a business that is independently owned and operated, with a small number of employees and relatively low volume of sales. The legal definition of "small" often varies by country and industry, but is generally under 100 employees in the United States and under 50 employees in the European Union. In comparison, the definition of mid-sized business by the number of employees is generally under 500 in the U.S. and 250 for the European Union. Small businesses are normally privately owned corporations, partnerships, or sole proprietorships. In Australia, a small business is defined as 1-19 employees and a medium business as 20-200 employees.

In addition to number of employees, other methods used to classify small companies include annual sales (turnover), value of assets and net profit (balance sheet), alone or in a mixed definition. These criteria are followed by the European Union, for instance (headcount, turnover and balance sheet totals). Small businesses are usually not dominant in their field of operation.

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 etc.

The smallest businesses, often located in private homes, are called microbusinesses (term used by international organizations such as the World Bank and the International Finance Corporation) or SoHos. The term "mom and pop business" is a common colloquial expression for a single-family operated business with few (or no) employees other than the owners. When judged by the number of employees, the American and the European definitions are the same: under 10 employees.

Problems faced by small businesses

Small businesses often face a variety of problems related to their size. A frequent cause of bankruptcy is undercapitalization. This is often a result of poor planning rather than economic conditions[3] - it is common rule of thumb that the entrepreneur should have access to a sum of money at least equal to the projected revenue for the first year of business in addition to his anticipated expenses. For example, if the prospective owner thinks that he will generate $100,000 in revenues in the first year with $150,000 in start-up expenses, then he should have no less than $250,000 available. Failure to provide this level of funding for the company could leave the owner liable for all of the company's debt should he end up in bankruptcy court, under the theory of undercapitalization.

In addition to ensuring that the business has enough capital, the small business owner must also be mindful of contribution margin (sales minus variable costs). To break even, the business must be able to reach a level of sales where the contribution margin equals fixed costs. When they first start out, many small business owners underprice their products to a point where even at their maximum capacity, it would be impossible to break even. Cost controls or price increases often resolve this problem.

In the United States, some of the largest concerns of small business owners are insurance costs (such as liability and health), rising energy costs and taxes. In the United Kingdom and Australia, small business owners tend to be more concerned with excessive governmental red tape

Another problem for many small businesses is termed the 'Entrepreneurial Myth' or E-Myth. The mythic assumption is that an expert in a given technical field will also be expert at running that kind of business. Additional business management skills are needed to keep a business running smoothly.

Marketing the small business

Common marketing techniques for small business include networking, word of mouth, customer referrals, yellow pages directories, television, radio, outdoor (roadside billboards), print, email marketing, and internet. Electronic media like TV can be quite expensive and is normally intended to create awareness of a product or service.

Many small business owners find internet marketing more affordable. Google AdWords and Yahoo! Search Marketing are two popular options of getting small business products or services in front of motivated Web searchers. Advertising on niche sites can also be effective, but with the long tail of the internet, it can be time intensive to advertise on enough sites to garner an effective reach.

Advantages of small business

A small business can be started at a very low cost and on a part-time basis. Small business is also well suited to internet marketing because it can easily serve specialized niches, something that would have been more difficult prior to the internet revolution which began in the late 1990s. Adapting to change is crucial in business and particularly small business; not being tied to any bureaucratic inertia, it is typically easier to respond to the marketplace quickly. Small business proprietors tend to be intimate with their customers and clients which results in greater accountability and responsiveness.

Independence is another advantage of owning a small business. One survey of small business owners showed that 38% of those who left their jobs at other companies said their main reason for leaving was that they wanted to be their own bosses. Freedom to operate independently is a reward for small business owners. In addition, many people desire to make their own decisions, take their own risks, and reap the rewards of their efforts. Small business owners have the satisfaction of making their own decisions within the constraints imposed by economic and other environmental factors. However, entrepreneurs have to work very long hours and understand that ultimately their customers are their bosses.

Several organizations also provide help for the small business sector, such as the Internal Revenue Service's Small Business and Self-Employed One-Stop Resource.