What Is the Vig in Sports Betting?
Sportsbooks don't just take bets — they take a cut on every single one. That cut is the vig. Understanding it is the first step to betting smarter.
By
Eric Pauly
9 min read
If you've ever wondered why sportsbooks are so profitable, the answer is the vig. Short for vigorish, the vig (also called the juice or margin) is the built-in commission sportsbooks charge on every bet. It's why the standard spread bet is priced at -110 instead of even money. It's why they don't care who wins — they're making money regardless.
Most casual bettors barely think about the vig. Sharp bettors are obsessed with it. Because over hundreds or thousands of bets, even small differences in vig have a massive impact on your long-term results. This guide breaks down exactly what vig is, how to calculate it, and — more importantly — how to reduce the amount you're paying.
article Summary
TL;DR: The vig (also called juice or margin) is the sportsbook's built-in commission on every bet. Standard -110 pricing = ~4.76% vig. Your break-even win rate at -110 is 52.38%. To reduce vig: shop lines, use reduced-vig books, avoid same-game parlays, and use tools like OddsJam or OddsShopper to find no-vig fair prices and positive EV opportunities.
What Is the Vig in Sports Betting?
The vig is the sportsbook's fee for accepting your bet. It's baked into the odds, so you never see it as a separate line item. Instead, the book shades the prices just enough that if equal money comes in on both sides, they profit no matter the outcome.
The most common example: a standard point spread bet priced at -110 on both sides. If the line were truly 50/50, both sides would be priced at +100 (even money). By pricing both sides at -110, the sportsbook collects extra juice. You have to risk $110 to win $100 — that extra $10 is the vig.
This works out to roughly a 4.5% margin per bet at -110. Over time, if you're betting without any edge, the vig will grind you down to a significant loss regardless of how your picks perform versus chance.
How to Calculate the Vig
You can calculate the vig (or "hold") on any market by converting the odds on both sides to implied probabilities and adding them together. The amount over 100% is the vig.
The formula:
For American odds (negative): Implied probability = (|odds| / (|odds| + 100)) × 100
For American odds (positive): Implied probability = (100 / (odds + 100)) × 100
For a standard -110/-110 spread:
Side A: 110 / (110 + 100) = 52.38%
Side B: 110 / (110 + 100) = 52.38%
Total: 104.76% — the 4.76% over 100% is the vig
Most sportsbooks run 4–10% vig depending on the market. Spreads and totals on major sports tend to be lower. Props and exotic markets are almost always higher.
How Much Are You Actually Paying in Vig?
Here's what different price points actually cost you in vig:
-110/-110: ~4.76% book hold (the standard)
-115/-105: ~4.76% — same total vig, just shifted to one side
-120/-105: ~6.3% — notably worse
-130/-110: ~8.9% — this is bad, avoid these lines when possible
-105/-105: ~2.4% — significantly better, found at low-vig books
A few reduced-vig sportsbooks (like Pinnacle and some betting exchanges) offer much tighter margins. If you're betting $5,000/month at -105 instead of -110, you're saving meaningful money over a year.
On player props, vig can run 8–15% or higher. These are much harder markets to beat. The higher vig raises your break-even win rate considerably.
The Break-Even Win Rate and Why It Matters
The vig sets your break-even win rate — the minimum percentage of bets you need to win to avoid losing money. At standard -110, your break-even is 52.38%. At -120, it jumps to 54.5%. At -130, it's 56.5%.
This is critical for understanding expected value (EV). If you think a team has a 53% chance of covering, that's a +EV bet at -110 (52.38% break-even). But it's a -EV bet at -120 (54.5% break-even). The vig determines whether your edge is actually edge — or just noise.
Sharp bettors always factor vig into their EV calculations. Casual bettors often don't, which is one of several reasons they consistently lose long-term.
How to Reduce the Vig You Pay
You can't eliminate the vig, but you can minimize it. Here's how sharp bettors do it:
Line shop aggressively. Different sportsbooks set slightly different lines and prices. Getting -107 instead of -110 on the same side saves you real money over time. Tools like OddsJam, OddsShopper, and Pick The Odds show you every book's current price in real time.
Use reduced-vig books. Some sportsbooks and betting exchanges run much tighter margins. If you can access them, prioritize getting your action there on standard markets.
Bet markets with lower vig. Spreads and totals at major books are typically priced tighter (lower vig) than same-game parlays, exotics, and many props. The more exotic the bet, the more vig is usually baked in.
Avoid same-game parlays. The vig compounds on each leg. Books also add extra margin on top. Same-game parlays are one of the highest-vig products sportsbooks sell — they're extremely profitable for the book and hard to beat.
Track your lines. Use a bet tracker that shows you closing line value (CLV). If you're consistently getting worse than the closing price, you're taking extra vig on top of the market vig. CLV tracking tells you the truth about where you stand.
The vig is one of those things that seems like a small detail but compounds into something enormous over time. Every bet, every line, every market — the vig is always there. Understanding it doesn't just make you a smarter bettor. It reframes how you evaluate every line you see.
The Bottom Line on Vig
The vig is unavoidable — sportsbooks need to make money. But how much vig you pay is largely within your control:
Shop for the best available price before every bet
Know your break-even win rate at every price point
Avoid high-vig products like same-game parlays and exotics
Use tools that show you no-vig fair lines so you can identify actual +EV
Track CLV to verify you're consistently getting good prices
Reducing vig isn't glamorous — it doesn't feel like finding edge. But bettors who consistently get 2–3% better prices than the average bettor are adding meaningful value to their bottom line over a full season of action.
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