Betting Margin
The betting margin (also called overround, vigorish, or juice) is the built-in profit margin a sportsbook applies to its odds, representing the difference between the true probability of outcomes and the implied probability reflected in the offered odds.
What it means in practice
The betting margin, also known as overround, vigorish (vig), or juice, is the mathematical edge built into a sportsbook's odds. In a perfectly fair market with two equally likely outcomes, each side would be priced at 2.00 in decimal odds (50% implied probability each, totaling 100%). In practice, a sportsbook might price both sides at 1.91, creating implied probabilities that total more than 100%. That excess -- in this case about 4.8% -- is the margin.
The margin is the primary source of sportsbook revenue. It functions similarly to the house edge in casino games, except that it varies across sports, leagues, markets, and individual events. Major markets like NFL moneylines or Premier League match results typically carry tighter margins (2-5%), while niche markets, prop bets, and parlays often carry wider margins (8-15% or more). The blended margin across all markets determines the operator's overall revenue profile.
For affiliates earning sportsbook RevShare, the betting margin directly impacts their earnings. Higher margins mean more net revenue per dollar wagered, which translates to higher RevShare payouts. However, operators with excessively high margins may struggle to attract and retain bettors, reducing overall player betting volume. The optimal balance between margin and volume is a core operator strategy that affiliates should understand when evaluating partnership opportunities.
How Betting Margin works across industries
See how betting margin is applied in the verticals Track360 supports, from qualification logic and payout structure to the operational context behind each model.
How Track360 handles this
Track360 provides transparent revenue reporting that reflects actual sportsbook margins on referred bettor activity. Operators can configure commission calculations based on net sportsbook revenue, giving affiliates clear visibility into how betting margins translate to their earnings across different markets and bet types.
Frequently Asked Questions
Common questions about betting margin, how it works in affiliate programs, and where it shows up across Track360's supported verticals.
A betting margin (also called overround, vigorish, or juice) is the built-in profit edge in a sportsbook's odds. It is the difference between the true probability of outcomes and the implied probability in the offered odds. For example, if both sides of a 50/50 event are priced at 1.91 instead of 2.00, the margin is approximately 4.8%.
Related Terms
Betting Odds
Betting odds represent the probability of an outcome in a sporting event and determine the potential payout for a winning bet. They are displayed in decimal, fractional, or American (moneyline) formats depending on the market.
Sportsbook RevShare
Sportsbook RevShare is a commission model where affiliates earn an ongoing percentage of the net revenue generated by their referred bettors from sports betting activity, typically calculated on net sportsbook revenue after payouts and adjustments.
Player Betting Volume
Player betting volume (also called handle or wagering volume) is the total amount of money wagered by a player or group of players over a given period, regardless of whether the bets win or lose.
GGR (Gross Gaming Revenue)
GGR is the total amount wagered by players minus the total amount paid out as winnings. It represents the raw revenue an iGaming operator earns from player activity before any deductions for bonuses, taxes, or operational costs.
Parlay
A parlay (also called an accumulator or multi-bet) is a single wager that combines multiple selections into one bet. All selections must win for the bet to pay out, with combined odds producing higher potential returns and higher risk.
Sportsbook Affiliate
A sportsbook affiliate is a marketing partner who drives bettors to a sportsbook operator in exchange for commissions, typically through CPA, RevShare, or hybrid deals tied to referred player activity.
In-Play Betting
In-play betting (also called live betting) allows bettors to place wagers on sporting events while they are in progress, with odds updating in real time to reflect the current state of play.
Continue Learning
Free structured courses that cover this topic and more.
How to Migrate an Affiliate Program Without Breaking Attribution
A practical migration plan for operators moving from an existing affiliate or IB system. Map your stack, protect attribution, preserve payout logic, and move to a new setup without creating reporting chaos.
How to Structure Affiliate Commissions
CPA, RevShare, hybrid models, KPI-based deals, and multi-tier payout logic. How to pick the right structure for your program, negotiate without losing margin, and adjust as your affiliate base grows.
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