The same bet can carry different prices at different sportsbooks. Comparing them before you bet is called line shopping, and it is one of the simplest ways to get better value.
What the vig is
The vig (or juice) is the sportsbook’s built-in margin. If both sides of a market are priced at -110, the implied probabilities are 52.38% each, which add up to 104.76%. The extra 4.76% is the book’s margin.
A quick comparison
- Book A offers -110 on a side: implied probability 52.38%.
- Book B offers -105 on the same side: implied probability 51.22%.
Book B’s price is better because you need a lower win rate to break even. Over many bets, that gap matters.
Practical tips
- Convert every price to implied probability so you compare like with like.
- Check that the line (the spread or total) is the same, not just the price.
- Only use licensed, regulated sportsbooks in your jurisdiction.
New to formats? Start with how to read betting odds.
Educational content only, not betting advice. Please gamble responsibly; 21+ where applicable.