Betting on horse racing or horse betting[1] commonly occurs at many horse races. Modern horse betting started in Great Britain in the early 1600s during the reign of King James I.[2][3] Gamblers can stake money on the final placement of the horses taking part in a race. Gambling on horses is, however, prohibited at some racetracks. For example, because of a law passed in 1951, betting is illegal in Springdale Race Course, home of the nationally renowned Toronto-Dominion Bank (TD Bank) Carolina Cup and Colonial Cup Steeplechase in Camden, South Carolina.
Where gambling is allowed, most tracks offer parimutuel betting where gamblers' money is pooled and shared proportionally among the winners once a deduction has been made from the pool. Parimutuel betting also provides purse money to participants and a considerable amount of tax revenue, with over $100 billion being wagered annually in 53 countries.[4][5][6]
In some countries – notably the UK, Ireland, and Australia – an alternative and more popular facility is provided by bookmakers who effectively make a market in odds. This allows the gambler to 'lock in' odds on a horse at a particular time (known as 'taking the price' in the UK).