Polymarket: player guide, sign-up and how prediction markets work

Polymarket is the world's largest prediction market — not a casino. You trade shares in the outcome of real events against other users, prices reflect crowd probabilities, and there is no house edge in the casino sense. This guide explains who it suits, how to open and fund an account, how markets resolve, its regulatory history and where the risks really sit.

By CasinoTrust Editorial TeamUpdated 31 August 202610 min readFact-checked against the Ranking Protocol

Polymarket tops our prediction market ranking. It belongs on a gambling review site because people use it to stake money on uncertain outcomes, but the mechanics are closer to an exchange than to a sportsbook, and the risks are different. Understanding that difference is the most valuable thing this page can give you.

Polymarket is a prediction market, not a casino

At a casino or bookmaker you play against the house, which sets prices with a built-in margin. On Polymarket you trade with other users. Each market asks a yes/no question — 'Will X win the election?', 'Will the Fed cut rates in September?' — and issues Yes and No shares that each pay $1 if correct and $0 if not. A Yes share trading at 64¢ implies the market thinks the event is 64% likely. Buy at 64¢, and if the event happens you receive $1; if it does not, the share expires worthless. You can sell at any time before resolution at the current price.

For sports, this means you can often find better prices on Polymarket than at a bookmaker on liquid events, and worse prices on thin ones. Compare the two directly in our sports betting reviews and the prediction market comparison.

Who Polymarket is for

• Traders and bettors who want prices without a bookmaker margin and the ability to exit early
• People with a genuine information or analytical edge on politics, macro, crypto or sport
• Crypto users comfortable holding USDC on Polygon and managing a wallet
• Not for: anyone wanting casino games, bonuses, fiat balances or a regulator behind the global platform

How to sign up at Polymarket step by step

1. 1

   Create the account

   Sign up with email (a wallet is created for you automatically) or connect an existing wallet such as MetaMask, Coinbase Wallet or WalletConnect. No promo code exists; there is nothing to miss at this stage. Choose a username — trading activity is public on-chain and on leaderboards.

2. 2

   Understand the KYC policy

   The global Polymarket platform does not require identity verification to trade; access is gated by geography, not by documents. Polymarket US, the CFTC-regulated venue launched after the 2025 QCEX acquisition, requires full KYC like any US derivatives exchange. Residents of restricted countries (historically including the US for the global site, France and others) are blocked, and VPN use breaches the terms.

3. 3

   Deposit USDC

   Fund your wallet with USDC on Polygon. Options: send USDC from an exchange directly on Polygon, bridge from Ethereum or other chains through the built-in deposit flow, or buy with a card via a third-party on-ramp (fees apply). Roughly $1 is enough to place a first trade. There is no fiat balance.

4. 4

   Place your first trade

   Open a market, choose Yes or No, and either buy at the market price or set a limit order at the price you want. Your maximum loss is the amount you spend; your maximum gain is the number of shares times $1 minus cost. Start with a liquid market where the spread is a cent or two.

5. 5

   Withdraw

   Winning positions resolve to USDC automatically when the market settles; open positions can be sold at any time. Withdraw USDC to any Polygon address or bridge out — settlement is on-chain and typically takes minutes. Network fees are small on Polygon.

Markets on Polymarket

Always read the full resolution criteria before trading. A market's title is a summary; the description defines exactly which source and which date settle it. Many expensive mistakes on prediction markets come from trading the headline rather than the rules.

Bonuses and promotions

Polymarket does not run casino-style bonuses. There is no deposit match, no free bets and no wagering to clear, which is why its bonus score is the lowest on the site. What exists instead is structural: liquidity rewards for placing resting limit orders near the mid-price on designated markets, and occasional referral or community programmes. If you see an offer advertising a 'Polymarket bonus code', treat it as an affiliate scheme or a scam, not as an official promotion.

Payments, fees and settlement

Trading has historically been free of platform fees on most markets, with costs coming from the bid-ask spread and slippage; check the current fee schedule on the site, as fees have been introduced on some market types. Because settlement is on-chain, there is no withdrawal queue, review period or maximum — a meaningful advantage over casinos, covered in our prediction market comparison.

Safety and regulation: an honest assessment

Polymarket's regulatory story is the most important thing to understand before using it.

• 2022 CFTC settlement: in January 2022 the US Commodity Futures Trading Commission found that Polymarket had offered off-exchange event-based binary options without registration. Polymarket paid a $1.4 million civil penalty, wound down non-compliant markets and agreed to block US users from the global platform.
• 2024–2025 investigations: after the 2024 US election, federal authorities investigated whether US residents were still trading on the platform; the founder's residence was searched in November 2024. The Department of Justice and CFTC closed their inquiries in July 2025 without charges.
• 2025 US return: Polymarket acquired QCEX, a CFTC-licensed designated contract market and clearing house, in mid-2025, and re-entered the US through a regulated entity, Polymarket US, later that year. Trading there falls under CFTC oversight with full KYC.
• Institutional backing: in late 2025 Intercontinental Exchange, the parent of the New York Stock Exchange, announced a major investment in Polymarket — a strong signal of staying power, not a guarantee of anything for an individual trade.
• Global platform status: outside Polymarket US, the venue is an unregulated on-chain marketplace. No regulator guarantees your funds, and your protection is the smart-contract code and the resolution process.
• Resolution risk: markets settle through published rules and the UMA optimistic oracle, where token holders vote on disputed outcomes. Several high-profile disputes have shown that a market can resolve in a way that surprises traders who read the title but not the rules, and that large oracle voters have influence. This is the equivalent of counterparty risk here.

Our trust score of 8.2 balances real transparency — every trade and resolution is on-chain and auditable — against the absence of regulatory protection on the global platform and the non-trivial oracle risk. Our scoring approach is in the Ranking Protocol; details on how we treat non-casino platforms are in the Editorial Policy.

Mobile and apps

Polymarket offers native iOS and Android apps alongside a responsive web app. The apps cover the full product: market discovery, order placement, portfolio and deposits. Wallet-connect flows work better in the browser; email-based accounts are smoother in the apps. Price alerts and push notifications on resolution are useful for traders who hold positions across many markets.

Customer support

There is no live chat or phone line. Support runs through an email ticket system, a help centre and a large Discord community where staff and moderators answer questions. For deposit or withdrawal issues, provide the transaction hash; for resolution questions, read the market rules and the oracle dispute thread first — support cannot change a settled outcome. Our support score of 7.0 reflects competent but asynchronous service.

Polymarket vs bet365 vs Stake

Use bet365 if you want the strongest regulatory protection and fiat banking; use Stake if you want a crypto sportsbook with casino games. Use Polymarket when you want to trade probability rather than accept a bookmaker's price, and when you value the ability to exit a position. Full comparisons: sports betting comparison and prediction markets.