Juice is the fee you never see charged.
No sportsbook sends you an invoice. The margin is folded into the odds themselves, which is why both sides of an even matchup are priced at -110 instead of even money. Understanding where that margin sits, and how much of it you are paying, changes how every other number on a betting screen reads.
Juice, vig, and hold
Juice is the sportsbook's margin, and you will hear it called vig, vigorish, or hold depending on who is speaking. Juice and vig usually describe what you are charged on one side of a market. Hold usually describes the book's theoretical margin across the market as a whole. All three point at the same thing: the reason the odds available to you are slightly worse than the true chances.
The tell is arithmetic. A market's outcomes must account for 100 percent of what can happen, but the implied probabilities of a real market always sum to more. That surplus is called the overround, and it is the margin, sitting in plain sight.
Where the margin hides at -110
Take the standard spread market, -110 on both sides. Convert each price: 110 divided by 210 gives 52.38 percent. Two sides at 52.38 percent add to 104.76 percent, which is 4.76 points more than reality allows. Dividing that overround by 104.76 gives the book a theoretical hold of about 4.5 percent of everything staked on the market.
The same figure describes what the price asks of you. Risking 110 to win 100 means you break even only at a 52.38 percent win rate. Being right exactly half the time, which sounds like par, is a steady loss at standard pricing. That gap of 2.38 points is the whole of the sportsbook's business, repeated across every ticket it takes.
Rescaling the two implied probabilities so they sum to 100 percent removes the margin and leaves the market's fair view, which for -110 and -110 is an even 50 percent each. That is what de-vigging means, and the no-vig calculator does it for any pair of prices.
Not all markets cost the same
Margin follows liquidity. The most heavily traded markets in football and basketball, the sides and totals that everyone bets, carry the thinnest margins, because books compete directly on them and any book that prices far off the market gets picked off.
Move away from those and the margin widens quickly. Player props are harder to price and traded at lower limits, so they carry more. Alternate lines carry more still. Same game parlays carry the most of all, since the correlation adjustment a book applies to related legs is an extra place for margin to live and is almost never visible from the outside.
None of this makes those markets unplayable. It does mean the bar for a genuine edge is higher on a five leg same game parlay than on a moneyline, and that a price which looks generous on a prop deserves a second look before it looks generous on a side.
Why -120 is not automatically the expensive one
The instinct is to read the margin straight off the price in front of you. Standard is -110, so -120 must be worse and +100 must be better. That instinct is wrong often enough to be worth correcting, because the margin lives in the two sides together and one price on its own simply does not contain the answer.
Work it through. A market posted at -120 and +100 implies 54.55 percent and 50 percent, which sum to 104.55 percent and leave a hold of 4.35 percent. The familiar -110 on both sides sums to 104.76 percent and holds 4.55 percent. The market carrying the more alarming number is the cheaper one. Push it further and -125 against +105 sums to 104.34 percent, a hold of 4.16 percent, cheaper again.
The practical consequence is that margin cannot be compared between books, or between markets, by looking at a single price. Add the two implied probabilities together and compare the sums. The no-vig calculator does exactly that, and it takes a few seconds per market.
The one habit that reliably lowers it
You cannot make the margin disappear, but you can decline to pay the worst version of it. Books disagree on the same market constantly, and taking -105 instead of -110 drops your break-even requirement from 52.38 percent to 51.22 percent. That is a full percentage point handed back on a wager you were making anyway.
Nothing about that requires a model or an opinion, only the discipline to check more than one screen before committing. The odds board lines every book we track up on one page for exactly that reason, and the positive EV finder takes the idea further by flagging the prices that sit on the good side of fair.
The margin scales with volume, not with stake
The figure that makes juice concrete is what it collects from someone with no edge at all. Staking one unit five hundred times at -110, with no advantage on any of them, hands the book about 22.7 units in expectation, which is that 4.55 percent applied to everything that went through. The result does not depend on being unlucky. It is the price of admission, charged in advance and collected slowly.
The important word in that sentence is volume. Halving the stake and doubling the number of wagers leaves the total staked unchanged, so it leaves the expected cost unchanged too. Betting smaller in order to bet more often is not a saving, and the only two levers that genuinely move the figure are taking fewer wagers and taking better prices.
That is an uncomfortable sentence for an industry that sells volume, and it is the honest one. If the number of wagers has been climbing while the reasons for them have not, responsible gambling sets out what that pattern tends to look like from the inside.
Juice and vig, answered
What is juice in sports betting?
Juice is the margin a sportsbook builds into its prices, and it is also called vig, vigorish, or the hold. It is not charged as a separate fee. It is baked into the odds themselves, which is why the two sides of a market always add up to more than 100 percent of probability.
Are juice, vig, and hold the same thing?
They describe the same margin from slightly different angles. Juice and vig usually refer to the price you are charged on a single side, while hold usually refers to the book's theoretical margin across the whole market. In casual use the three words are interchangeable.
How much is the juice on a standard -110 line?
At -110 on both sides, each price implies 52.38 percent, and the two together sum to 104.76 percent. The book's theoretical hold is that 4.76 points of overround divided by the 104.76 total, which comes to about 4.5 percent of everything staked.
What win rate do you need at -110?
You need to win 52.38 percent of your wagers just to break even at -110. Winning exactly half is a losing record at that price, and the difference between 50 and 52.38 percent is the entire reason sportsbooks are profitable businesses.
How do you calculate the vig on a market?
Convert both prices to implied probability, add them together, and subtract 100 percent. The remainder is the overround. Dividing the overround by the sum gives the hold as a share of what is staked, and rescaling each side by that sum gives you the fair, no-vig probabilities.
Why is the juice higher on some markets than others?
Margin tracks liquidity and uncertainty. Heavily traded markets like NFL sides carry thin margins because books compete on them. Player props, alternate lines, and same game parlays carry far wider margins, because they are harder to price and are traded by fewer people at lower limits.
Can you avoid paying juice?
Not entirely, but you can pay less of it. Shopping the same market across books and taking the best available price is the most reliable way, since a market priced at -105 instead of -110 lowers your break-even point by roughly a full percentage point. Reduced-juice promotions and boosts do the same thing occasionally.
Does removing the vig tell me the true probability?
It tells you the market's fair estimate, which is not quite the same thing. De-vigging strips out the book's margin and leaves the probability the price implies, and that is the honest benchmark to compare a model number against. It is still an estimate produced by a market, not a fact.
Stop paying the worst price available
Our odds board compares the same market across the books we track, so the cheapest version of any wager you were already making is one screen away.