A business improvement district (BID) is a defined area within which businesses pay an additional tax (or levy) in order to fund projects within the district's boundaries. The BID is often funded primarily through the levy but can also draw on other public and private funding streams.
BIDs in England and Wales are funded by a levy on the occupiers rather than the owners of the properties within the area. If voted in by local businesses, the BID levy is an extension to existing non-domestic business-rates. In the UK, for a BID to go ahead the ballot must be won on two counts: straight majority and majority of rateable value. This ensures that the interests of large and small businesses are protected.