Polymarket vs a Sportsbook: Betting Without a Bookmaker
On Polymarket the price is set by other users, not a bookmaker. How that works, and why it had the best result-market price in six of ten cases in our data, plus the catches.
Last reviewed November 3, 2026
Key takeaways
- >Polymarket shares pay $1 if the outcome happens; the share price is the implied probability
- >There is no bookmaker margin: the cost is the spread in the order book (plus any fees)
- >Median 1X2 margin 2.0%, against 3.1–5.9% at the sportsbooks we measure
- >Best 1X2 price on 61% of selections, 76% on favourites
- >Catches: limited depth at the best price, mainly result markets, crypto wallet, not available everywhere
Polymarket and a sportsbook both let you back Liverpool to beat Arsenal, but they work in completely different ways. One has a bookmaker setting the price; the other has no bookmaker at all. That difference shows up directly in the price you get.
How a sportsbook works
At Toto, Unibet or Overtime, the operator sets the odds and takes the other side of your bet. Its profit comes from the margin built into every price, and from limiting or refusing customers who win consistently.
How Polymarket works
Polymarket is a prediction market. For a match there is a share per outcome, for example "Liverpool win", that pays $1 if it happens and $0 if it doesn't. Users buy and sell those shares with each other, in an order book, much like a stock exchange.
- The share price is the implied probability: 40¢ means the market prices it at 40%.
- The decimal odds are 1 / share price: 40¢ = 2.50.
- There is no bookmaker margin. The cost of trading is the gap between the best buy and sell prices (the spread), plus any fees in Polymarket's current terms.
Because the prices come from users rather than a bookmaker, there is no bookmaker to limit your account for winning.
The prices, measured
Using the price you could actually buy at on Polymarket (the best ask). Margins are medians over 506–634 matches per venue; "best price" counts the 473 matches where all four venues priced the result market:
Venue | Median 1X2 margin | Best price (incl. ties) |
|---|---|---|
Polymarket | 2.0% | 61.3% |
Unibet | 3.1% | 27.5% |
Overtime | 4.0% | 8.2% |
Toto | 5.9% | 5.8% |
Polymarket had the best price on six selections out of ten. It was especially strong on favourites, where it was best 76% of the time.
An example, Aston Villa vs Fulham on 31 October 2026 (the match ended 1-1):
Venue | Villa | Draw | Fulham | Margin |
|---|---|---|---|---|
Polymarket | 2.04 (49¢) | 3.85 (26¢) | 3.85 (26¢) | 1.0% |
Unibet | 1.91 | 3.95 | 4.10 | 2.1% |
Toto | 1.99 | 3.55 | 3.60 | 6.2% |
The catches
- Depth. A Polymarket price is only valid for the number of shares on offer at that price. A big stake may have to buy at worse prices further down the order book. Our data records the best price, not the depth behind it.
- Market range. Polymarket's football coverage centres on the result market. Totals, both teams to score and player props are thinner or absent; in our data we only have its 1X2 prices.
- Money and access. You trade in a dollar stablecoin from a crypto wallet. Polymarket is not available in every country; check its terms for where you live.
- Settlement. Outcomes are resolved by Polymarket's own resolution process rather than a bookmaker's settlement team. For a standard full-time result that is straightforward, but read the market's rules before you buy.
When it is worth it
For the main result of big matches, Polymarket was the cheapest place to bet in our data, by a clear margin. For totals, props and smaller leagues, a sportsbook is often the only option, and then comparing sportsbooks matters most.
How we measured this: Edge Terminal's odds history, last price recorded before kickoff, matches played August – early November 2026 in nine competitions; Polymarket price = 1 ÷ best ask, from its order book. Snapshot taken 3 November 2026. This site is not affiliated with Polymarket. Nothing here is a tip.