In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes zero platform trading fees. Your only expenses are Polygon gas costs (usually below $0.01 per trade) and any conversion charges when exchanging USDC into GBP. This positions Polymarket amongst the most affordable prediction markets for UK participants.
Trading Fees: Zero
In contrast to conventional sportsbooks that embed an overround margin into each market, Polymarket employs an AMM-style order book where liquidity providers establish the spread. Polymarket itself levies no direct "vig" or commission. Instead, you encounter the spread implicitly, which tightens as more liquidity flows into the market.
Gas Fees on Polygon
Every Polymarket transaction executes on the Polygon PoS chain, with gas paid in MATIC at rates typically ranging from $0.001 to $0.02 per transaction irrespective of stake amount. This represents a substantial saving versus Ethereum mainnet costs.
- Opening a position: ~$0.003–0.01
- Closing a position or claiming winnings: ~$0.003–0.01
- Moving USDC to an external address: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided unless essential)
Deposit Fees
Sending USDC directly onto Polygon carries no fee from Polymarket's end. However, your source exchange may impose a withdrawal charge to move USDC to the Polygon network. Coinbase typically deducts ~$0.01–1 based on current network activity. Opting for the Polygon-native USDC route keeps expenses down.
Currency Conversion Costs (GBP ↔ USDC)
UK-based users typically encounter the largest cost burden at the conversion stage. A complete two-way conversion cycle (GBP → USDC → GBP) through a mainstream exchange normally incurs 0.5–1.5% in total fees, factoring in the bid-ask spread.