In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes zero platform trading fees. Your actual expenses consist solely of Polygon gas fees (usually below $0.01 per transaction) plus any conversion charges when you exchange USDC into GBP. This positions Polymarket amongst the most economical prediction markets for traders based in the UK.
Trading Fees: Zero
In contrast to conventional bookmakers that embed a margin (overround) into each market, Polymarket operates via an AMM-style order book where liquidity providers determine the spread. Polymarket itself levies no direct "vig" or commission. You encounter the spread indirectly, which tightens as additional liquidity enters the market.
Gas Fees on Polygon
Every transaction on Polymarket executes on the Polygon PoS blockchain, with gas costs denominated in MATIC and ranging from $0.001 to $0.02 per transaction irrespective of your stake size. This represents a substantial saving compared to Ethereum's mainnet costs.
- Opening a position: ~$0.003–0.01
- Closing or settling a position: ~$0.003–0.01
- Moving USDC funds to an outside address: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided except when essential)
Deposit Fees
Transferring USDC directly onto Polygon carries no cost from Polymarket's perspective. However, your banking partner may impose a withdrawal charge to move USDC to Polygon. Coinbase typically deducts ~$0.01–1 based on current network demand. Opting for the Polygon-native USDC pathway reduces your overall expense.
Currency Conversion Costs (GBP ↔ USDC)
UK-based users encounter their most substantial expense at the conversion stage. A full cycle of converting GBP into USDC and back again through a mainstream exchange normally incurs 0.5–1.5% in combined fees, accounting for the exchange's bid-ask spread.