Complementary currencies

A complementary currency is a currency or medium of exchange which is not a national currency, but which is thought of as supplementing or complementing national currencies. Complementary currencies are usually not legal tender and their use is based on agreement between the parties exchanging the currency. According to Jérôme Blanc of Laboratoire d'Économie de la Firme et des Institutions, complementary currencies aim to protect, stimulate or orientate the economy. They may also be used to advance particular social, environmental, or political goals.

When speaking about complementary currencies, a number of overlapping and often interchangeable terms are in use: local or community currencies are complementary currencies used within a locality or other form of community (such as business-based or online communities); regional currencies are similar to local currencies but used within a larger geographical region; and sectoral currencies are complementary currencies used within a single economic sector, such as education or health care. Many private currencies are complementary currencies issued by private businesses or organizations. Other terms include alternative currency, auxiliary currency, and microcurrency.

Advocates in the 1960s, especially in Canada, promoted complementary currencies to supplement national currencies. Certain leaders of this movement were careful to use the term 'complementary'. They used it to emphasize the importance of working in cooperation with governments and the tax system, businesses and other established organisations.

Since the 1980s there has been a steady increase in the number of complementary currencies. In 1993 there was roughly 500, by 2003 there was over 4000.

Complementary currencies are often designed intentionally to address specific issues, for example to increase financial stability. Most complementary currencies have multiple purposes and/or are intended to address multiple issues. They can be useful for communities that do not have access to financial capital, and for adjusting peoples' spending behavior. The 2006 Annual Report of the Worldwide Database of Complementary Currency Systems presented a survey of 150 complementary currency systems in which 94 respondents said that "all reasons" were selected, among cooperation, micro/small/medium enterprise development, activating the local market, reducing the need for national currency, and community development.

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