Sportsbook

Sportsbook: how a sports betting product works

A sportsbook (sports betting platform) is the product for betting on sport: the pre-match and in-play line, odds with a margin, trading, limits and bet settlement. Revenue is the hold on betting turnover, and it depends on the calendar and match results far more than in a casino.

Yevhen SychovOctober 2026

Key parts

  • The line: events and markets with odds, before the match (pre-match) and during play (in-play). Every price has a margin built in.
  • Odds trading: models and traders move prices in response to news and player money, and suspend markets at dangerous moments.
  • Risk management: maximum stake and payout per market, bet limits per player, spotting professional bettors.
  • Bet settlement: based on official results, with rules for postponed and cancelled matches.

Economics and how it differs from casino

GGR = turnover x holdFor example, €2,000,000 was staked in a month at 8% hold: GGR is €160,000. If the favourites that most bettors back won all month, hold can fall to 3% and GGR to €60,000.
CasinoSportsbook
Where revenue comes fromthe house edge in every gamethe margin in the line and match results
Holdclose to theory on large turnoverswings from one round of fixtures to the next
Calendarsteady, with peaks in the evenings and at weekendsoff-season in the top leagues, peaks during major tournaments

CRM for sports bettors

  • Segments by sport, league, team and bet type: pre-match, in-play, accumulators.
  • Calendar triggers: the day before the player's favourite team plays, the start of a round, the opening of a tournament.
  • Offers: free bets with minimum odds, boosts, acca insurance. Cross-sell into casino only when the player shows interest.
  • Exclusions: self-excluded players, players with limits and players showing risk markers, such as stakes rising after losses, get no offers.

Common mistakes

  • Judging the month by hold. A round that goes well for players pulls hold down even with the same line. Look at hold over a quarter and at margin by market.
  • Copying casino mechanics. Players almost never clear an x40 wagering requirement on sport, and without minimum odds they clear the bonus on outcomes like 1.05.
  • Not preparing for the off-season. Without the top leagues, bettors go quiet. Campaigns for other leagues and sports are prepared in advance, not once activity has already dropped.
All glossary terms