8 Things You Must Know About Sports Betting Value Bets - Ghost Betting Tips


8 Things You Must Know About Sports Betting Value Bets

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You don’t need to win every bet to be profitable from sports betting.

In fact, it’s not even about picking as many winners as you can.

Professional sports betting is based on making value bets.

This is one of the most important things you’ll ever learn from your sports betting career.

If you have never heard of the term ‘value’ used in the betting industry before, you had best free up some time and read this post from start to finish.

Here’s all you need to know about value bets in sports betting.

What Is A Value Bet?

This is the key to making money from sports betting and where a lot of people make mistakes.

Once you understand this, everything else will start to make sense.

Here’s the deal:

When a bet pays out more than it should do on a winner, it’s called a value bet.

Here’s a simple analogy to emphasise this point.

Imagine you went to the store and noticed a hockey mug branded with your favorite team was being sold for $15.

Is there value here?

Well, in this example, no because you’d be paying what you’d expect to be paying: $15.

However, you decide to go to a different store and they are offering that same mug for $10.

You’re receiving the exact same product for less than what you would have expected to pay.

This is known as value.

In sports betting, it works the same way;

You’re looking for odds that give you more bang for your buck.

With us so far?


If not, we suggest you study this more – it’s really that important!

If you’re ready to continue, the next concept to understand is called ‘implied probability’.

As the term suggests, it’s very math-intensive but it’s super important.

Implied Probability

Each set of betting odds corresponds to a percentage chance of winning.

This is known as the implied probability.

Here’s a very basic example to explain.

Imagine you were betting on an event that had the odds set at +400.

This can be converted into an implied probability of 20%.

In other words, the sportsbook’s odds imply that this event has a 20% chance of winning.

If the sportsbook has calculated these odds correctly, you should break even if you make this bet 1 out of 5 times.

Let’s say that you bet $100 on this event.

If it wins, you make $400 profit.

Assuming that the sportsbook has created its odds correctly, here’s what your profit and loss would look like:

Event 1Win$100$400
Event 2Lose$100($100)
Event 3Lose$100($100)
Event 4Lose$100($100)
Event 5Lose$100($100)

From this, you can work out that your total profit after making the 5 bets would be $0 – just as expected.

But what is the sportsbook is wrong?

What if the percentage chance of this bet winning was more than 20%?

What if you worked out that it was actually 40%?

Assuming now that you have correctly calculated the percentage chance of winning, here’s what your profit and loss would look like:

Event 1Win$100$400
Event 2Win$100$400
Event 3Lose$100($100)
Event 4Lose$100($100)
Event 5Lose$100($100)

Instead of breaking even, you will have now made a $500 profit.

That’s a great win!

In general, sportsbooks will pay out bigger on events that they don’t think are as likely to happen.

So, if you’re bet only had a 20% of winning, the odds will reflect this with a big payout potential.

If you spot better payouts but you think that your bet doesn’t really deserve that payout, you have found value.

In other words, if the implied probability (set by the bookmakers) is lower than the actual probability (your prediction of how likely that event will occur) you have found value.

The bigger the difference, the more valuable the bet.

As value increases, the more likely you should be making that bet.


It goes without saying that you don’t know what’s exactly going to happen but by calculating these probabilities, you can have a decent idea.

Long-term success from sports betting is based on making value bets.

This may mean that from time to time, you bet on the team you think is going to lose.


Here’s an example to explain.

Imagine you spot a matchup that has a massive underdog, say +500.

You think that the odds look about right.

You also know that this team is going to lose.

However, you don’t think it’s quite as nailed on compared to what the sportsbook thinks.

Let’s say you think that out of every 10 events, the underdog will win 3.

Therefore, you are effectively saying that their chances of winning are 30%.

After converting +500 into implied probability, you find that the sportsbook only thinks there is a 16.67% chance of winning.

Considering your 30% chance is larger than the bookmakers, this is a bet you should be making.

Let’s run through the outcomes.

Event 1Win$100$500
Event 2Lose$100($100)
Event 3Lose$100($100)
Event 4Win$100$500
Event 5Lose$100($100)
Event 6Lose$100($100)
Event 7Lose$100($100)
Event 8Lose$100($100)
Event 9Lose$100($100)
Event 10Win$100$500

As you can see, you would make a total profit of $800 – even though you knew they were going to lose.

It’s around this time that what we said earlier about not needing to win every bet should really start to make some sense.

As long as you make good value bets, you will be profitable.

How To Calculate Implied Probability

There are two ways to calculate implied probability.

The first way is by doing long-winded math.

Alternatively, you could use our margin calculator that does all the hard work for you!

Plus, it will tell you how much the sportsbook will charge you for using their service.

Calculate Implied Probability

Spot the undervalued markets with this intelligent calculator

Calculate Implied Probability

Spot the undervalued markets with this intelligent calculator

When You Shouldn’t Make Value Bets

But I thought you said you should only make value bets?

If this was your response to reading to the beginning of this section, at least we know that you’re paying attention.

There are only two reasons why you shouldn’t make value bets.

While they will still be profitable over the long-term, it may be worth just holding off on these occasions:

Thin Value

The bigger the difference between the implied probability and the actual probability, the bigger the reason to make the bet.

However, large differences are pretty hard to come by.

In reality, the differences are going to be a lot smaller.

When the value is extremely close, it’s not worth it.

Sure, it’s a profitable play but you should consider not making a bet that is too close to call.

Huge Favorites/Underdogs

This is the polar opposite of the above reason.

When the odds on the favorite and/or underdog are so big, it really isn’t worth it.

After all, is anyone really going to bet on an event that has odds of -10,000, even if you calculate that the actual probability converts the odds to somewhere around -9,000.

At the end of the day, it’s just common sense.

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Don't let your friends miss out on value ever again.

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Don't let your friends miss out on value ever again.

Sports Betting ROI

Winning records don’t equal profitable records.


To the beginner, this may sound surprising.

But it’s true and we will go through an example to explain.

Imagine you bet on 9 events during the day and went 5-4, each bet staked at $100 on the favorite.

Here are the outcomes:

Event 1$100-200Win$50
Event 2$100-110Lose($100)
Event 3$100-175Win$57.10
Event 4$100-320Win$31.30
Event 5$100-350Lose($100)
Event 6$100-110Lose($100)
Event 7$100-175Win$57.10
Event 8$100-230Win$43.50
Event 9$100-235Lose($100)

After the 9 bets, you have a win percentage of 55.55% but you actually made a loss of $161.

This clearly shows that winning records have absolutely nothing to with profitability in sports betting.

Even though this example looks at only betting the favorites, it still applies to the underdogs.

Instead of looking at winning records, pay attention to the Return on Investment (ROI).

This shows you how much money you are making based on the amount you are betting.

ROI is expressed as a percentage.

For example, if you bet $100 and won $10, your ROI was 10%.

While this is a simple example, there is a formula you can use to calculate a more difficult ROI.

It is as follows:

ROI = (Profit / Total Investment) * 100%

So, going back to our 5-4 winning record, our ROI would have been:

ROI = (($161) / $900) * 100% = (0.1789) * 100% = (17.89%)

In other words, you should expect to lose close to 18 cents for every dollar you would have invested.

Unfortunately, this remains the case for a lot of sports bettors with winning records; little do they know that they’re actually losing money.

Bottom line:

When you record your bets, always record it in ROI.

Finding The Best Odds

This is the final thing to understand sports betting value bets.

With everything you’ve learned, imagine that you become interested in a particular bet if you can find odds better than +130.

You log into your standard sportsbook and notice that their line is currently at +135.

Should you take this bet?

Not necessarily.

While it is certainly offering better value, it may not be the best line available to you.

This is because each sportsbook may have different odds for the same event.

If you’re wagering $100 but instead of profiting $35 from a +135 line, you could profit $45 from a +145 line on the exact same event, you’re making an extra $10.

You haven’t done anything different to your strategy; you’re just getting better value for money.

Best Sportsbooks

Read our list of the best sportsbooks and find the most value

Best Sportsbooks

Read our list of the best sportsbooks and find the most value

How Sportsbooks Set Their Betting Lines

In a perfect world, a sportsbook would get the same amount of money bet on either side of the betting line.

Sportsbooks pay out less than what they should because they need to make money.

This is where the ‘juice‘ comes in.

This means that if they do manage to get the same amount of money on either side of the line, they pay out the same amount.

Adding this altogether and it turns out that no matter the outcome of the event, the sportsbook makes money from their juice.

After all, they are in the business of making money.

While they encourage you to gamble, they certainly don’t want to gamble themselves.

So, in order to make sure they get enough action on each side of the betting line, they will adjust them to either attract bettors or keep them away.

The lines will continue to shift until enough money has been bet on each side of the betting line.

The biggest influencers on lines moving are public opinion and big money bets.

When it comes to sports betting, the population aren’t the cleverest bunch.

We know this but more importantly, so do the sportsbooks.

They can set lines with no value but the betting public will continue to bet them anyway.

However, this can work in your favor.

As the population blindly bets one side of the line, it allows you to find some real value.

Each sportsbook shifts its line on its own accord.

Their only concern is making sure their book is making money; they don’t care about other sportsbooks.

This will result in different lines being set by each individual sportsbook.

You may find that at times they are fairly similar, sometimes they’ll be exactly the same and also sometimes where they are totally different.

Line Shopping

Just as you would shop for the best price on everyday items, line shopping enables you to find the best betting odds.

All you need to do is check three or four different sites and you’re well on your way.

There may even be times where some bets aren’t available on one site but there’s much more value on another.

You don’t even need to make all your bets on one specific site either.

Spread your bets around so you are squeezing as much value out of the sportsbooks as you can.


There’s only a couple of reasons why you wouldn’t line shop.

You’re either lazy or you don’t care about money.

These are not good traits to have, especially for sports betting.

With modern technology and the internet, it’s never been easier to shop different betting lines.

Make sure you’re signed up and logged in to a handful before placing your bets so you’re ready to jump on the value.


If you can understand the concept of value, it’s much more likely you’ll find success from sports betting.

Which topic made the most sense to you?

Leave a comment or let us know on Twitter.

Get in touch if there’s anything you don’t understand in this article, or you have questions about anything else.

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