In this guide
What Are Polymarket's Fees in 2026?
Polymarket does not impose any platform trading fee. Your expenses are limited to Polygon gas fees (usually below $0.01 per trade) and any conversion charges when exchanging USDC into GBP. This positions Polymarket among the most affordable prediction markets for traders in the UK.
Trading Fees: Zero
In contrast to conventional bookmakers that embed an overround margin into each market, Polymarket operates via an AMM-style order book where liquidity providers establish the spread. Polymarket itself does not levy any direct "vig" charge. You encounter the spread indirectly, which tightens as additional liquidity enters the market.
Gas Fees on Polygon
Every Polymarket transaction executes on the Polygon PoS network, requiring gas payments in MATIC that ordinarily range from $0.001 to $0.02 per transaction independent of stake amount. This represents a substantial reduction compared to Ethereum's main chain.
- Opening a position: ~$0.003–0.01
- Closing a position or claiming winnings: ~$0.003–0.01
- Moving USDC to an outside account: ~$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's end. However, your bank or exchange may apply a fee when transferring USDC to the Polygon network. Coinbase typically charges ~$0.01–1 based on network demand. Opting for the Polygon-native USDC pathway reduces your overall outlay.
Currency Conversion Costs (GBP ↔ USDC)
British users encounter their most substantial expense at the conversion stage. A typical two-way conversion (GBP → USDC → GBP) through a leading exchange runs 0.5–1.5% in total fees, accounting for the exchange's bid-ask margin.