In this guide
What Are Polymarket's Fees in 2026?
Polymarket charges no platform trading fee. The only costs you pay are Polygon gas fees (typically under $0.01 per transaction) and any exchange fees when converting USDC to GBP. This makes Polymarket one of the lowest-fee prediction markets available to UK traders.
Trading Fees: Zero
Unlike traditional sportsbooks that build a margin (overround) into every market, Polymarket uses an AMM-style order book where the spread is set by liquidity providers. There is no explicit "vig" charged by Polymarket itself. You pay the spread implicitly, which narrows as markets attract more liquidity.
Gas Fees on Polygon
All Polymarket transactions run on the Polygon PoS network, where gas fees are paid in MATIC and typically cost between $0.001 and $0.02 per transaction regardless of position size. This is dramatically cheaper than Ethereum mainnet.
- Trade entry: ~$0.003–0.01
- Trade exit/redemption: ~$0.003–0.01
- USDC withdrawal to external wallet: ~$0.005–0.02
- Bridge (Polygon → Ethereum): $5–20 (avoid unless necessary)
Deposit Fees
Depositing USDC directly to Polygon is free on the Polymarket side. Your exchange may charge a withdrawal fee to send USDC to Polygon. Coinbase charges ~$0.01–1 depending on network congestion. Using the native Polygon USDC network minimises costs.
Currency Conversion Costs (GBP ↔ USDC)
This is where UK users face the most meaningful cost. Typical round-trip conversion (GBP → USDC → GBP) via a major exchange costs 0.5–1.5% total, including the exchange spread.