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Polymarket Odds & Probability for Trading Explained 2026

Updated: May 22, 2026, 4:46 PM ET

Polymarket odds are not your traditional sportsbook odds. Yes, they tell you the probability of an event happening, but they present it in a different format from what you will find on conventional sportsbooks.

In this simple guide, we will delve into how β€œodds” operate on the prediction market. You will learn what these numbers represent, how to make trades with them, and how they are directly related to pricing on the platform. We will also include a few mistakes you might make when reading these numbers, along with how to avoid them.

Polymarket
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Must be 18 years or older and have a legal, U.S. residential address within the applicable state, D.C., or U.S. territories. Not available in AZ, IL, MA, MD, MI, MT, NJ, NV and OH.

What Are Polymarket Odds and How Do They Work?

We already hinted that Polymarket is not a conventional sportsbook, which is why you'll only findΒ Polymarket sports trading. Instead, it is a prediction market that allows you to buy and sell event contracts tied to various outcomes. The β€œodds” here also tell you the probability of something happening, but they appear as prices attached mostly to Yes or No positions.

For instance, you have this sports contract: Fulham vs Man City

You opt for the market that states that the match will end in a draw. For this, you will find two positions, each with its own price:

  • Yes: 24 cents
  • No: 78 cents

The Yes contract shows a 24% chance of the game ending in a draw. Meanwhile, the No side says there is a 78% chance the draw won't happen. These numbers rise and fall based on market activity and how the event unfolds.

Calculating the Potential Profits from Polymarket Odds

Another thing to understand is how you get returns from Polymarket odds. To explain this, we will use a political market such as β€œWill Candidate X win the election?”.

The price for each Yes contract is $0.58, which means there is a 58% chance Candidate X wins the election. You buy 100 shares at $0.58 each, bringing your trade to a total of $58. If Candidate X wins, you'll receive $100 because each correct prediction pays $1.00. That's $42 returns on your $58 initial share amount.

Interestingly, you can β€œsell” your positions on the Polymarket app or website before the event resolves. This is a good move when the price rises, but there’s still a lot of uncertainty surrounding your prediction. For example, if the cost of the Yes contract increases to $0.78 for each one, you can sell the 100 event contracts for $78. You still get $20 returns.

How Polymarket Determines Its Odds

Unlike traditional online sportsbooks, where a team of oddsmakers sets the lines, Polymarket takes a different approach. Below is a summary of the factors that determine the prices you'll find on the prediction market:

Are There Fees Attached to Trading on Polymarket Odds?

We have a comprehensive guide on Polymarket fees that you can go through to learn about any extra charges on the platform. However, to give you an overview, Polymarket does not charge trading fees. This is one of the many features that make the prediction market stand out.

So, how does Polymarket make its profit? Well, through the spread. If you look closely at most markets, you will notice that the Yes and No positions do not add up to $1. For instance, a Yes contract can be priced at $0.66, while the No side is $0.35. That means a total of $1.1. The $0.1 difference goes to the prediction market.

Common Mistakes to Avoid When Reading Polymarket Odds

Here are some common mistakes we have seen users make, along with how you can avoid them:

  • Misinterpreting prices for certainty: A 70% price means a 70% chance of an event occurring, not a certainty. There's still a 30% chance that the event will not happen.
  • Failing to monitor market volatility: Prices on Polymarket can shift quickly with new information or trading activity. So, treat the odds as fluid amounts that can rise or fall sharply, especially during fast-moving events.
  • Buying more event contracts than you intended: If you’re new to prediction markets, start with fewer positions. Ensure you have a budget and do not use more than the intended amount when trading.

Hits and Misses of "odds" on Polymarket

The following are the pros and cons of the pricing at Polymarket:

Final Thoughts on Polymarket Odds

With this guide, you know exactly what to expect whenever you hear β€œPolymarket odds”. To recap, these are numbers that show you how the price of every contract, as well as the probability of that event happening.

These prices also change based on market sentiment, supply and demand dynamics, and liquidity providers. So, when you place an order, it’s important to keep an eye on the price to know if it rises or falls. This way, you can choose to hold your position or wait till the event resolves to see if your prediction is accurate. If you feel ready to start trading on Polymarket, you can do so by clicking the links featured on this page.

Polymarket
4.7/5
Deposit $20 get $50
Welcome Offer
Must be 18 years or older and have a legal, U.S. residential address within the applicable state, D.C., or U.S. territories. Not available in AZ, IL, MA, MD, MI, MT, NJ, NV and OH.

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