In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes no direct platform trading fee. Your expenses are limited to Polygon gas fees (usually below $0.01 per transaction) plus any fees incurred when exchanging USDC into GBP. This positions Polymarket amongst the most cost-effective prediction markets for traders based in the UK.
Trading Fees: Zero
In contrast to conventional betting operators that embed a margin (overround) into every market, Polymarket operates via an AMM-style order book where liquidity providers determine the spread. Polymarket itself does not levy any explicit "vig". Instead, you encounter the spread implicitly, which decreases as additional liquidity flows into the market.
Gas Fees on Polygon
Every transaction on Polymarket executes on the Polygon PoS chain, requiring gas payments in MATIC that generally fall between $0.001 and $0.02 per transaction irrespective of trade volume. This represents a substantial reduction compared to Ethereum's main network.
- Opening a trade: ~$0.003–0.01
- Closing a position or claiming winnings: ~$0.003–0.01
- Transferring USDC to your own wallet: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided except when essential)
Deposit Fees
Sending USDC directly onto Polygon incurs no charge from Polymarket. However, your bank or exchange may apply a fee when moving USDC to the Polygon network. Coinbase typically charges ~$0.01–1 based on current network activity. Opting for the native Polygon USDC route reduces overall expenses.
Currency Conversion Costs (GBP ↔ USDC)
For UK-based users, currency conversion represents the most substantial fee consideration. Converting between GBP and USDC and back again (GBP → USDC → GBP) through a mainstream exchange normally incurs 0.5–1.5% in total costs, factoring in the bid-ask spread.