A bookmaker, bookie or turf accountantfact: date=September 2008, is an organization or a person that takes bets and pays winnings depending upon results and, depending on the nature of the bet, the odds.

Range of events

Most bookmakers in the United States bet merely on college and professional sports, though in the United Kingdom they offer a wider range of bets, including each-way betting on golf, football and tennis, and especially horse racing and greyhound events. They also specialize in novelty events such as betting the probability that it will snow on Christmas Day, the outcome of political elections and reality television contests such as I'm a Celebrity... Get Me Out of Here!, Big Brother and The X Factor, or that aliens will be found on Mars.

Operational procedures

By adjusting the odds in his favor or by having a point spread, the bookmaker will aim to guarantee a profit by achieving a 'balanced book', either by getting an equal number of bets for each outcome, or (when he is offering odds) by getting the amounts wagered on each outcome to reflect the odds. When a large bet comes in, a bookmaker can also try to lay off the risk by buying bets from other bookmakers. The bookmaker does not generally attempt to make money from the bets themselves, but rather profiting from the event regardless of the outcome. Their working methods are similar to that of an actuary, who does a similar balancing of financial outcomes of events for the assurance and insurance industries.

Legality

Bookmaking may be legal or illegal, and may be regulated; in the United Kingdom it was at times both regulated and illegal, in that licences were required but no debts arising from gambling could be enforced through the courts. Now, since the inception of the National Lottery, not only is it completely legal in the UK, it is a small contributor to the British economy, with a recent explosion of interest with regard to the international gaming sector industry. However, gambling debts still remain unenforceable under English law.

Bookmaking is generally illegal in the United States, with Nevada being a notable exception.

In some countries, such as Singapore, Sweden, Canada and Hong Kong, the only legal bookmaker is state-owned and operated. In Canada, this is part of the lottery program and is known as Sport Select.

In the United Kingdom, trusted legal bookmakers are members of IBAS, which is an industry standard organization which resolves to settle disputes.

Scams

Sometimes, savvy individuals set up an illegal book in an attempt to make money - a scene often seen in films, sitcoms and so on. One of the most infamous real-life illegal bookmakers was Robert Angleton of Houston, Texas. Not only was he a bookie, but he also was a police informant about his smaller rivals. When they were shuttered, he took their business. His bookmaking scheme ended with the death of his wife, Doris Angleton.