You hit the over. You expected to profit $100. You made $87.
That missing $13 didn’t disappear — it went to the book. That’s the juice in betting, and it’s on every single wager you place, win or lose.
Juice (also called vig) is baked into the odds before you ever see the line. It’s not a fee that shows up at checkout. It’s already inside the number. This post breaks down what juice is, how to calculate it, why prop bets carry more of it than standard game lines, and what you can actually do about it.
How Juice Works in a Bet
Juice is the margin sportsbooks build into every line to guarantee themselves a profit regardless of the outcome. At -110/-110 odds — the standard for most game lines — you bet $110 to win $100. The book collects $110 from the loser, pays out $100 to the winner, and keeps $10. At standard -110, books hold approximately 4.5 cents on every dollar wagered across a balanced market.
That hold exists whether you win or lose. You’re not paying juice directly — it’s buried in the price you see. When you take a -110 line, you’re not betting a coin flip at even odds. You’re betting a coin flip at a slight disadvantage. Same game, different math.
Juice goes by a few names — vig, vigorish, the cut, the rake. They all mean the same thing: the book’s built-in edge on the transaction.
How to Calculate Juice on Any Line
The juice on a line is the gap between the combined implied probabilities and 100%.
Here’s how it works. -110 odds imply a 52.4% win probability. Both sides of the same bet at -110 add up to 104.8%. A fair market would add up to exactly 100% — that extra 4.8% is the juice.
Quick reference:
| Odds | Implied Probability | Book Hold |
|---|---|---|
| -105 | 51.2% | ~2.4% |
| -110 | 52.4% | ~4.5% |
| -115 | 53.5% | ~6.7% |
| -120 | 54.5% | ~9.1% |
The heavier the odds, the more juice. A prop posted at -125 on one side and -105 on the other looks like a normal line — but you’re actually paying around 8% hold. The asymmetry hides the cost.
Why Prop Bets Carry More Juice Than Game Lines
Prop bets carry significantly more juice than standard game lines — books hold 8–12% on player props compared to 4–6% on sides and totals.
The reason is pricing uncertainty. A game spread draws balanced action from bettors who have similar information. A player prop on a backup running back after a late injury report? The book has much less confidence in their number, and they charge more for the privilege of betting it.
Wider true probability ranges mean wider spreads between the two sides — which means more juice baked in. When you see a player prop at -130 on the over and -100 on the under, that’s not a sharp line. That’s a book hedging their uncertainty with margin.
How Sportsbooks Set Player Prop Lines breaks down how books build those numbers — and where the cracks are.
How Juice Affects Your Break-Even Rate
Juice raises the win rate you need to be profitable — and most bettors never do this math.
At -110, you need to win 52.4% of your bets just to break even. Not 50%. At -115, it’s 53.5%. At -120, it’s 54.5%. A bettor going exactly .500 at -110 loses approximately 4.5 units per 100 bets. That’s not bad luck. That’s juice doing its job.
The real question before any bet isn’t “do I like this?” It’s “do I like this enough to overcome the juice?” A prop at -120 requires 54.5% before you profit a dollar. Most bettors who think they’re close to break-even are actually losing steadily because they’re winning 50% on -115 lines and wondering why the bankroll keeps shrinking.
Reduced Juice Books — What They Are and Whether They Matter
Reduced juice books offer lower vig than standard — typically -105/-105 instead of -110/-110. That drops your break-even threshold from 52.4% to 51.2%. Over hundreds of bets, that 1.2% gap compounds into real money.
Pinnacle is the most well-known reduced juice book globally. Some US books run reduced juice promotions periodically. The catch: reduced juice is mostly available on game lines, not player props. Props vary widely by book regardless — you’ll still find -130/-100 splits on props at reduced-juice books.
For prop bettors, the practical version of reduced juice is line shopping: finding the best available price across multiple books before placing. Paying -108 instead of -115 on the same prop at a different book is functionally identical to using a reduced juice book — and it’s available every day, on every market. Shopping lines is the juice management tool that’s actually accessible.
Summary
Juice is the cost baked into every bet you place — not a separate charge, but built into the odds themselves. Prop bets carry more juice than game lines, which means the edge you need to be profitable is higher before you ever make a pick. Know your break-even rate, shop for better prices when you can, and treat what is juice in betting as a real variable in every decision — not a footnote.
