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The History of Sports Betting

History & cultureBetting history

People have bet on contests for as long as contests have existed. This guide gives a brief history of sports betting up to the online era.

Key takeaways
  • Wagering on races and athletic contests dates back to the ancient world, where spectators bet informally on competitors.
  • Organised fixed-odds bookmaking developed around horse racing and grew into the modern sportsbook, with a margin built into prices.
  • It brought sportsbooks online and added in-play betting and cash out, letting people bet during events with constantly updating odds.

Ancient contests

Wagering on races and athletic contests dates back to the ancient world, where spectators bet informally on competitors.

Fixed-odds bookmaking

Organised bookmaking with fixed odds developed around horse racing and grew into the modern sportsbook, with the margin built into prices.

Note. The idea of a bookmaker setting prices that balance their book is centuries old and still underpins betting today.

The online era

The internet brought sportsbooks online, then added in-play betting and cash out, letting people bet during events with constantly updating odds.

Integrity and regulation

As betting grew, so did focus on sporting integrity and regulation, to keep events fair and players protected.

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🔞 18+ only. Examples are hypothetical and for explanation only — they are not betting advice or real odds. Please gamble responsibly.

FAQ

How old is sports betting?

Wagering on races and athletic contests dates back to the ancient world, where spectators bet informally on competitors.

How did bookmaking start?

Organised fixed-odds bookmaking developed around horse racing and grew into the modern sportsbook, with a margin built into prices.

How has online betting changed sports betting?

It brought sportsbooks online and added in-play betting and cash out, letting people bet during events with constantly updating odds.

How we made this guide. This guide is written and maintained by the 1xRoll Editorial Team and explains the general, widely-accepted rules of the market. All examples are hypothetical and illustrate mechanics only — they are not predictions, betting advice or real odds. Specific rules can vary by event and operator, so always check the in-game or in-bet-slip rules. editorial approach · responsible-gaming policy

Last updated: 2026-06-15

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