Prediction-market review
Polymarket Review: International Platform, Fees and Restrictions
Polymarket is a prediction-market platform where users trade positions on real-world outcomes.
This review covers the international product only. Polymarket US is separate and should not be merged into the same eligibility claim.
On this page
Balanced assessment
What is documented
Polymarket publishes detailed official documentation for its peer-to-peer order book, outcome shares, non-custodial wallet model, market-specific fees, and UMA-based resolution process.
The trade-offs
The tradeoffs are equally important: location rules are specific, liquidity can affect exits, disputed outcomes can take longer, and crypto transfers can be irreversible.
Key facts
- Product model
- International prediction-market platformPeer-to-peer central limit order book with onchain settlement
- Fees
- Taker fees on certain markets; parameters vary by category and market
- Settlement
- Market-specific rules and UMA Optimistic Oracle process
- Eligibility
- Country and region restrictions apply; confirm directly
Also documented
- Collateral
- pUSD on Polygon, according to current official documentation
- Positions
- Yes and No outcome shares
- Custody
- Polymarket describes the model as non-custodial
How Polymarket works
Polymarket’s official documentation says users trade outcome shares with other users rather than against a house. Prices are formed through a peer-to-peer order book. A share price between $0.00 and $1.00 represents the market’s implied probability, not a guarantee.
Every Yes and No pair is fully backed by pUSD. Winning shares redeem for $1.00; losing shares settle at $0.00.
Resolution and disputes
The individual market rules matter more than the headline. Official documentation says each market defines its resolution source, end date, and edge cases. Polymarket uses the UMA Optimistic Oracle process: proposals require a bond, anyone can dispute during the challenge period, and disputed cases can take longer.
Fees
Polymarket’s current official fee documentation says taker fees apply on certain markets, makers are not charged, fee parameters differ by category, and geopolitical or world-events markets are fee-free. It also says Polymarket does not charge a USDC deposit or withdrawal fee, although intermediaries may charge their own fees.
Deposits, withdrawals, and custody
The official help center describes token, network, and wallet-address steps for transfers. Check the supported route carefully: wrong-chain or wrong-address transfers can be irreversible. Non-custodial does not mean risk-free. Wallet access and private-key security still matter.
Non-custodial is not a synonym for carefree. Double-check the network before moving funds.
Location restrictions
The international help center lists blocked countries and region-level restrictions. Ontario is listed separately from Canada, which is why a country-only Canada result is not enough for an eligibility decision.
| Country / region | Access status / source guidance | Stored code |
|---|---|---|
| Canada: Ontario | Restricted. Ontario is listed separately from Canada. | Stored code: CA-ON |
| Ukraine: Crimea | Restricted | Stored code: UA-43 |
| Ukraine: Donetsk | Restricted | Stored code: UA-14 |
| Ukraine: Luhansk | Restricted | Stored code: UA-09 |
| Singapore, Poland, Thailand, and Taiwan | Close-only handling described separately on the official page |
Singapore, Poland, Thailand, and Taiwan have close-only handling described separately on the official page. Check the current restriction guide directly before acting.
VPN: Do not use a VPN or similar tool to bypass location restrictions.
Main risks
- A wrong prediction can settle at zero.
- Prices can move before resolution.
- Liquidity and spreads can affect early exits.
- Disputed resolutions can take longer.
- Wrong-network or wrong-address transfers can be irreversible.
- Location restrictions and terms can change.
Before you go to the official site
Read the restrictions and risks above first. These links leave Casino Capybara.
Official sources
Frequently asked questions
Is Polymarket a casino?
No. Casino Capybara treats Polymarket as a prediction-market platform.
Is Polymarket available in Canada?
Do not use a blanket Canada-wide answer. Ontario is separately restricted on the international platform, and readers should confirm the current official rules directly.
Can I use a VPN to trade from a restricted location?
No. The official restriction guide prohibits VPN or similar bypass tools.
Related guide
How prediction markets workA plain-language guide to prices, positions, liquidity, and resolution.