# Vig and juice: the margin built into every price

> Vig, or juice, is the margin a sportsbook builds into its prices. See the -110/-110 example: 104.76% total probability and a margin near 4.55%.

Source: https://reviewstandings.com/what-is-vig/
Updated: 2026-11-13

Vig, also called juice, is the margin a sportsbook builds into its prices. On a two-outcome market priced -110 on each side, the implied probabilities are 52.38% each and add up to 104.76%. The excess, about 4.55% of that total, is the margin. This example is hypothetical, not an operator's figure.

## What vig is

If a sportsbook priced both sides of a game at their true chances, the implied probabilities would sum to 100%. Operators price so that they sum to more. The excess is the vig.

Overround names the same thing from the other side: the amount by which the sum exceeds 100%. Juice is the casual term for vig.

**Bottom line:** if the implied probabilities of a market add to more than 100%, the extra is the sportsbook's margin.

## The -110/-110 example

**Two-outcome market priced -110 on each side · hypothetical · Example (not an offer)**

| Step | Working | Result |
|---|---|---|
| Implied probability of one side | 110 / (110 + 100) | 52.38% |
| Sum of both sides | 52.38% + 52.38% | 104.76% |
| Excess over 100% | 104.76% - 100% | 4.76 points |
| Margin as a share of the total | 4.76 / 104.76 | about 4.55% |

Each side wins 100 on a stake of 110.

If both sides were backed equally, the operator would pay 100 and keep 10 of every 220 staked, which is the 4.55%. Read [implied probability](https://reviewstandings.com/what-is-implied-probability/) for the formula, or check any price on [the odds converter](https://reviewstandings.com/odds-converter/).

## Why this is not an operator's margin

The example uses a round, invented price. Real markets have different prices on each side, and many have three or more outcomes. We have not measured the margin of any operator, and we make no claim about whose prices are better.

A parlay compounds the margin of each leg; see [the parlay calculation](https://reviewstandings.com/parlay-payout-calculation/).

## How we checked

The formulas are our own derivation. We have not yet quoted an operator or regulator glossary definition; when we do, it will carry a URL, a date and at most 15 words. More: [bet types, odds and margins](https://reviewstandings.com/bets-odds-and-margins/).

19+ in Ontario and British Columbia; 18+ in Alberta, Manitoba and Québec. Gambling involves risk. Play responsibly.

## FAQ

**What is the difference between vig, juice and overround?**

Vig and juice are two names for the margin the sportsbook builds into a price. Overround is the same margin seen as the amount by which the implied probabilities of all outcomes exceed 100%.

**How do I calculate the vig on a -110/-110 market?**

Each side implies 110 divided by 210, which is 52.38%. The two add to 104.76%. The excess of 4.76 points is about 4.55% of the 104.76% total.

**Is -110/-110 the margin of a real sportsbook?**

No. It is a hypothetical market chosen to show the arithmetic. A real operator's margin differs by market, and we have not measured one.

**Can a strategy remove the vig?**

No. The margin is part of every price. No staking pattern removes it, and we do not suggest one.