Betting 101
The Vig: The House's Quiet Tax
4 min read
TL;DR
Both sides of a -110/-110 line imply 52.4% each — 104.8% total. That extra 4.8% is the book's fee. You must be better than the vig, not just better than a coin flip, to profit.
Why both sides add past 100%
Flip a fair coin at a sportsbook and both heads and tails will be priced -110. Each implies 52.4%; together that's 104.8%. Reality only has 100% to give — the overage is the vig (or juice, or hold): the book's built-in margin for hosting the bet.
At -110 you must win 52.4% of your bets just to break even. Winning 51% of your coin flips still loses money.
The vig varies — and that matters
Standard game lines run ~4-5% vig. Player props often carry more (less competition, more book risk), and exotic parlays carry the most. Two practical consequences:
- The higher the vig, the bigger your edge has to be before a bet is worth making
- Removing the vig ("no-vig price") shows the book's true opinion — useful when comparing books
How to give the house less
You can't avoid vig, but you can minimize it: shop for the best price on every bet (a -105 instead of -115 on the same prop is a permanent, guaranteed saving), avoid stacking high-vig markets out of habit, and treat parlays as entertainment priced accordingly. Our Market Pulse best-price board shows exactly which book is cheapest on tonight's props.
Keep these
- -110 both sides = 4.8% built-in house margin
- Break-even at -110 is 52.4%, not 50%
- Lower vig via line shopping is a guaranteed, repeatable saving
Up next
Line Shopping: The Cheapest Edge in Betting
