Understanding Bookmaker Vig: What You Need to Know

Sports betting is undoubtedly on the rise, and many are eager to get into it. However, before you start placing your bets, there's something you need to get familiar with – the Bookmaker vig . You might be asking, what is that? Don't worry, we got your back. Let's break down everything you need to know about this term and why it is vital for your bets.

What Is Bookmaker Vig?

You probably encountered it referred to as " Vigorish ", " Juice ," " Cut ," or " Take ," or most commonly known as Vig . It's basically the commission charged by bookmakers to make their profit. You see, bookies aren't in the business of losing money. They slightly adjust the odds to create what's known as an " Overround ," which includes the vig in the betting line.

How Does the Vig Work?

Let's say a sportsbook sets the Odds of Team A winning at 58% and Team B at 44%. If we are to add those probabilities together, it goes more than 100%, specifically 102%. That extra 2% is the Overround , and it's where Bookmakers make their money.

The Vig in Action

Remember, the vig is not a hidden fee; it's always shown and included in the odds of a sporting event. You'll find it on both sides of the event since bookies want to ensure they profit, no matter the outcome. The vig can also be represented in dollar amounts or as a percentage. However, that percentage is not static. The vig is an active surcharge based on the bookmaker's chosen overround. As more bets come in, the odds shift to balance things out.

Types of Bets and Vig

Now, let's talk about different types of bets and how the vig plays a role.

Over-Under Bets

These are also called totals, where you bet on whether a game's final point total is over or under a predetermined number. The vig for over-under bets is usually standardized. For example, in a bet with -110 odds on both sides, there's a 4.76% vig.

Point Spreads

On the other hand, point spreads don't offer even odds. Let's say you see a spread bet like Buffalo Bills -2.5 -110 and Miami Dolphins +2.5 -110 . That -110 means you'll have to vouch for $110 to win $100. That extra $10 represents the bookmaker's vig.

Removing the Vig for Clarity

If you want to see what the bookmaker expects, you can remove the vig from the odds. It helps you compare fees between different sportsbooks. Here's how you do it:

1. Calculate the implied probabilities of all outcomes.
2. Use the total implied likelihood to find the vig as a percentage.
3. Calculate the actual probability by removing the overround to bring the implied chances to 100%.

For example, if the overround is 105%, you can calculate the vig as 4.76%. This helps you understand what the sportsbook thinks about the game's outcome.

How to Calculate the Vig

So we already know how to calculate the overround, but how do we calculate the actual vig? You can calculate the vig by using an online calculator, or just do it yourself using this formula: Vig = 1 – 1 / overround x 100