What is Vig in Sports Betting? The House Edge Explained
Definition
Vig & Juice: The House Edge in sports betting how sportsbooks make money on every bet.
Think of it this way
Like the convenience store charging $5 for something that costs $4 at the grocery store.
Vig & Juice: The House Edge
The vig (or "juice") is how sportsbooks guarantee profit. It's a hidden fee built into every bet.
The Convenience Store Analogy
A grocery store sells water for $1. The convenience store next door sells the same water for $1.25.
Why? Because you're paying for convenience. That extra $0.25 is their profit margin.
The vig works the same way. You're paying a small fee to the sportsbook for the privilege of betting.
How It Works
In a fair coin flip:
- Heads should pay +100 (even money)
- Tails should pay +100 (even money)
But sportsbooks don't offer fair odds. They offer:
- Heads -110
- Tails -110
At -110, you bet $110 to win $100. The extra $10 is the vig.
The Math
If two people bet opposite sides at -110:
- Person A bets $110 on Heads
- Person B bets $110 on Tails
- Total pot: $220
Winner gets $210 ($110 back + $100 profit) Sportsbook keeps $10 no matter what.
That $10 is the vig.
Why It Matters
The vig means you need to win MORE than 50% to profit:
- At -110 odds, you need to win 52.4% to break even
- The extra 2.4% is the sportsbook's edge
Standard Vig Amounts
| Odds | Vig | Break-Even % |
|---|---|---|
| -110/-110 | 4.5% | 52.4% |
| -105/-105 | 2.4% | 51.2% |
| -120/-100 | 4.5% | 54.5% on favorite |
DMP Note
We always remove the vig before calculating EV. This shows you what a bet is REALLY worth, not what the sportsbook wants you to think.
Key takeaway: The sportsbook isn't your friend. They profit from every bet.
How DMP uses this
DMP removes the vig to show you "fair" odds. This is essential for calculating true EV.
Common mistake
Ignoring vig when comparing lines. Two books might have the same line but different vig.
After this lesson
You understand why sportsbooks always win and how vig works.
Apply These Concepts in Real Betting Markets
The DumbMoneyPicks app scans thousands of player prop lines to find potential +EV opportunities and role shifts caused by injuries.
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