Polymarket vs Betfair, explained

What these two platforms are

Polymarket is an on-chain prediction market. Each contract is priced between zero and one dollar, so the price reads as the market's implied probability of an outcome, and positions settle in USDC on the Polygon blockchain. Its catalogue spans politics, economics, crypto, weather, sports, and other event categories, and in December 2025 it launched a CFTC-regulated US exchange alongside its existing international on-chain market. The Betfair Exchange, launched in 2000, is a peer-to-peer betting exchange where users back a selection, hoping it happens, or lay it, offering a price on it not happening. It quotes traditional decimal odds, settles in fiat currency, and concentrates on sports and horse racing, with comparatively little coverage of politics or world events.

Cent Signals covers Polymarket specifically. It reads the public prices, volume, liquidity, and wallet activity on Polymarket and explains what those figures describe. If you are new to reading those numbers, the companion explainer on what Polymarket is and how it works walks through the basics first.

Feature comparison (as of 2026)

The table sets Polymarket and the Betfair Exchange side by side on the dimensions that actually differ. Each cell describes a current fact as of 2026. Fee schedules, regional access, and regulatory status all change over time, so treat each platform's own published terms as the authoritative source.

Yes, Partial, and the short value cells above describe the current state of each platform as of 2026. They are not ratings and do not rank one platform above the other.

Prices as probability versus betting odds

The most visible difference is how each one expresses a price. On Polymarket, a YES share trades somewhere between zero and one dollar, and that price in cents reads straight off as an implied probability: a contract at 40 cents corresponds to roughly a 40 percent chance, and a matched pair of YES and NO shares is always backed by one dollar of USDC. Betfair quotes decimal odds instead, where a price of 2.5 means a winning stake returns two and a half times itself, and the implied probability is one divided by the odds. The two are describing the same underlying idea, a market-derived probability, in different units. For how to read the Polymarket version, the explainer on reading implied probability on Polymarket works through several examples.

Coverage, settlement, and how trades are matched

The two platforms cover different ground. Betfair concentrates on sports and horse racing, with deep liquidity and real-time in-play trading during live events, a feature that suits fast-moving sporting markets. Polymarket carries a broad mix of politics, economics, crypto, weather, and sports, with many markets that stay open for weeks or months until an event resolves. Settlement differs too: Polymarket positions clear in USDC on Polygon and resolve through the UMA optimistic oracle, while Betfair settles in fiat currency under its gambling licenses. Both use a peer-to-peer matching model rather than a house taking the other side, which is why each can be read as a market rather than a fixed-odds book. Because Polymarket settles on a public chain, its trades and balances are inspectable on-chain, which is the property that lets Cent Signals read Polymarket activity at all.

Fees, commission, and the Expert Fee

On costs, the structures look quite different. As of 2026, Polymarket has used a taker fee that varies by category while maker orders that add liquidity pay no fee, with no platform deposit or withdrawal fee, and its US exchange applies a separate flat taker fee. Betfair charges a base commission of around 5 percent on net winnings, with no commission on losing bets and reductions for high-volume accounts. Betfair also applies an additional Expert Fee, formerly called the Premium Charge, which can take a large share, reportedly up to around 60 percent, of the lifetime profits of its most consistently winning users, a charge that has no direct equivalent on Polymarket. Both sets of figures move over time, so the platforms' own current pages remain the authoritative reference. For the Polymarket side in detail, the Polymarket fees explainer breaks down the category taker fee and where it peaks.

Regulation and where each is available

Regulation is where the two diverge most sharply. Betfair is licensed and regulated as a gambling operator, holding licenses from authorities such as the UK Gambling Commission, and it runs in markets including the United Kingdom, Ireland, Australia, and parts of Europe, but not the United States. Polymarket's status is more contested: its international on-chain market has historically geoblocked US users, while its CFTC-regulated US exchange launched in December 2025 treats event contracts as financial derivatives rather than wagers, even as some state regulators and other jurisdictions argue the contracts resemble gambling. The guide on whether Polymarket is gambling covers that debate, and the Polymarket vs Kalshi comparison sets it against a CFTC-designated exchange.

How Cent Signals fits in

Cent Signals is not a platform and not a place to take a position. It is a free, independent reading desk for the public data Polymarket exposes, and it tracks Polymarket specifically rather than Betfair. It indexes markets with real activity behind them and the wallets that transact large notional, then explains what the prices and positions describe. You can see that on the markets worth a second look index, or on a tracked wallet such as this Polymarket trader and the positions it currently holds. Those pages report observations of public data, never instructions. For how the figures are collected, see the methodology page.

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