In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes zero platform trading fees. Your only expenses consist of Polygon gas costs (usually below $0.01 per trade) plus any fees incurred when exchanging USDC into GBP. This positions Polymarket among the most cost-effective prediction markets for traders in the UK.
Trading Fees: Zero
Unlike conventional sportsbooks that embed a margin (overround) into all markets, Polymarket operates via an AMM-style order book where liquidity providers determine the spread. Polymarket itself levies no direct "vig" charge. Instead, you encounter the spread as an implicit cost, which tightens as additional liquidity enters the market.
Gas Fees on Polygon
Every Polymarket transaction executes on the Polygon PoS network, with gas fees denominated in MATIC and ranging from $0.001 to $0.02 per transaction independent of stake size. This represents a substantial saving relative to Ethereum's main chain.
- Opening a position: ~$0.003–0.01
- Closing or settling a position: ~$0.003–0.01
- Moving USDC to an outside address: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided unless critical)
Deposit Fees
Sending USDC directly onto Polygon incurs no charge from Polymarket. However, your bank or exchange may levy a fee when transferring USDC to Polygon. Coinbase typically charges ~$0.01–1 contingent on network load. Opting for the native Polygon USDC route reduces your overall outlay.
Currency Conversion Costs (GBP ↔ USDC)
UK-based participants encounter their greatest cost burden at the conversion stage. A full cycle of conversion (GBP → USDC → GBP) through a mainstream exchange normally runs 0.5–1.5%, accounting for both the exchange margin and the bid-ask spread.