Definition

The bookmaker’s commission or edge on a bet, built into the odds. Also known as the “juice,” it’s the reason the implied probabilities of all outcomes sum to over 100%. The vig ensures the house makes money by paying out slightly less than fair odds.

Formula

Example

If implied odds for a two-fighter match sum to 104.5%, that extra 4.5% is the **vig**. For instance, if Canelo is -210 (67.7%) and Crawford +180 (35.7%), total 103.4% – the \~3.4% difference is the sportsbook’s vig (their built-in profit margin).