Sportsbooks calculate the vig based on the odds they set for different bet types—moneyline, spread, and over/under—by adjusting the implied probability of each outcome to ensure their profit margin. For moneyline bets, the vig is embedded in the odds; for instance, if a team has odds of -150, bettors must wager $150 to win $100, meaning the sportsbook expects to profit from that extra $50. With point spread bets, the typical vig is often set at -110, indicating that a bettor needs to wager $110 to win $100, again incorporating the vig into the odds. For over/under bets, the sportsbook will balance the total points and adjust the odds slightly, often also around -110, to attract equal betting on both sides while ensuring they retain a percentage of the bets, thus guaranteeing a profit regardless of the game’s outcome.