What Is Vig?

In sports betting, vig, short for vigorish, is the built-in commission a sportsbook charges for taking your bet, embedded directly into the odds rather than billed separately. It is why a coin-flip game priced at -110 on both sides never actually pays out even money.

Key Takeaways

• Vig (vigorish) is the sportsbook's built-in margin, baked into odds rather than charged as a separate fee.
• Standard -110 pricing on both sides of a spread carries roughly a 4.76% vig.
• You need to win about 52.4% of your -110 bets just to break even, not 50%.
• Vig varies by market: player props, parlays, and futures often carry far higher margins than standard spreads.
• Line shopping and understanding no-vig odds are the two most practical tools for beating the house edge.

Why Does Understanding Vig Matter For Sports Bettors?

Understanding vig matters because it is the single biggest obstacle standing between a bettor and long-term profit. The vig matters most for profit margin, since bettors are only profitable if they have made money after accounting for the vig. Bettors who ignore it often think they're breaking even at a 50% win rate, when the math says otherwise.

The target win percentage for high-level sports bettors sits around 52.4% rather than 50.01%, and that 52.4% figure applies specifically to anyone betting exclusively at the -110 price point. Miss that number consistently and you're paying the house to play, no matter how sharp your picks feel.

How Does Vig Actually Work In A Sportsbook's Odds?

Vig works by pricing both sides of a bet slightly below true 50/50 odds, so the sportsbook profits regardless of which side wins. On a standard point spread, both teams get priced at -110 instead of even money.

A point spread is often listed with -110 odds, and if there was no vig, it would be at even odds, or +100. With the vig, a $100 bet results in a $190 payout instead of the $200 you'd get at true even odds. That missing $10 is the sportsbook's cut, collected no matter which side of the spread hits.

Novice bettors sometimes assume that number represents a flat 10% fee, but the math is a little sharper than that. Risking $110 to win $100 does not translate to ten percent, since that would mean risking $100 to win $90. Risking $110 to win $100 actually translates to 9.1%, because 100 is 90.9% of 110. Getting comfortable with terminology like this is part of building real sports betting literacy, the same kind of foundational vocabulary work bettors do when they study a poker glossary before sitting at a real table.

How Do You Calculate The Vig On A Betting Line?

You calculate vig by converting each side's odds into implied probability, adding those percentages together, and subtracting 100. Implied probabilities exceed 100% because bookmakers build in a profit margin called the vig or juice, and both sides of an NFL spread at -110 carry a 52.38% implied probability each, totaling 104.76%, with the extra 4.76% representing the bookmaker's edge.

That formula scales to markets with more than two outcomes, too. You add up all of the implied probabilities in the market, and in markets with many options both totals typically land over 100%, with the overround representing whatever the total probabilities add up to past 100. Futures markets, where a dozen or more teams share one board, tend to stack that overround far higher than a two-way spread.

Why Does Vig Vary So Much Between Different Bet Types?

Vig varies between bet types because sportsbooks price risk differently depending on liquidity, volatility, and how much action a market attracts. Most sportsbooks charge 4-7% vig on popular markets, while sharp books may charge as low as 2-3%, and props, parlays, and niche markets often carry much higher vig, sometimes 10-20%.

Parlays compound this effect with every leg you add. Each leg added to a parlay compounds the vig from the individual legs, so a two-leg parlay at -110 per leg carries roughly twice the effective vig of a single bet, and the more legs added, the further the parlay payout strays from true fair odds. Futures sit at the top of the vig scale entirely. Futures consistently carry the highest vig of any market, and when you add up the implied probability of all possible outcomes on a championship winner market, the total frequently exceeds 120% to 140% or more.

What Are Some Real Examples Of Vig In Action?

Real examples of vig show up every time you glance at a standard odds board, even when the number isn't labeled. Here's how it plays out across common bet types.

• Standard spread example: Two teams both priced at -110 on a point spread. In games where the betting action is split 50/50 and both teams are listed at -110, the sportsbook makes a profit of around 10% regardless of who wins, as illustrated by a market where both sides carry $11 million in spread bets.
• Balanced-book payout example: If the sportsbook takes equal action on both sides, it collects $110 from the losing side, pays out $100 in winnings plus the $100 stake to the winning side, and keeps $10 as vig revenue.
• Futures market example: A division-winner market with six or more teams. Instead of a tidy 104% overround, the combined implied probability can balloon well past 120%, since markets like the 2021 NFC North division champion odds taken from popular sportsbooks showed one book with a 9.42 overround and another with 8.94.

What Are The Most Common Mistakes Bettors Make About Vig?

The most common mistake bettors make about vig is assuming it's a flat, simple percentage that's the same across every market. In reality, the number shifts constantly by sport, bet type, and even sportsbook.

• Believing losers pay the vig. Winners, not losers, pay vigorish. Many bettors operate under the fallacy that losers pay vigorish, which is wrong. The vig is deducted from what the winning side collects, baked into the payout math itself.
• Assuming -110 always means a 10% fee. As shown above, laying $110 to win $100 works out to roughly 9.1%, not a clean 10%.
• Treating all sportsbooks as equally priced. Sharp books like Pinnacle may charge as low as 2-3%, while mainstream retail books often run notably higher. Skipping line comparison leaves money on the table over hundreds of bets.
• Ignoring how parlays stack vig. Bettors often see an appealing parlay payout without registering that every additional leg compounds the house's edge.

How Does Vig Compare To Other House Edge Concepts Like Hold And Juice?

Vig compares closely to related terms like hold and juice, and in casual conversation, bettors often use them interchangeably, though the terms carry slightly different technical meanings. The vigorish, more commonly referred to as the vig, is the built-in price sports bettors pay to place a wager, and other names for it include juice, rake, take, cut, or hold.

Sharper distinctions do exist beneath that surface. Vig refers to the margin on a single market, while hold refers to the total margin across all bets a sportsbook takes. The table below breaks down how these terms typically get used across betting and gaming contexts.

Vig specifically describes the margin built into sports betting lines, while house edge is the term more commonly used in casino gaming to describe the mathematical advantage the house holds in games like blackjack or roulette. Both concepts work the same way at a fundamental level: the house prices its product so it wins over the long run, whether the game is a spread bet or a spin of the wheel, a principle that shows up just as clearly in the tech and probability discussions found across our broader gaming coverage.

Continue Learning

• British Gambling Terms: a breakdown of UK betting slang and terminology that pairs well with understanding vig and other North American sportsbook language.
• Poker Glossary: a resource for building the foundational vocabulary bettors need across betting and card game strategy alike.

Sources & Review

• FOX Sports, "What Is Vig in Sports Betting and How Does It Work"
• BetMGM, "What Is the Vigorish In Sports Betting and Why Does It Matter?"
• RotoWire, "What is the vig in sports betting?"
• Legal Sports Report, "What Is Vig / Juice And How Is Vigorish Calculated?"
• Wikipedia, "Vigorish"