In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes zero platform trading fees. Your only expenses are Polygon gas fees (usually below $0.01 per trade) plus any conversion costs when exchanging USDC into GBP. This positions Polymarket amongst the most affordable prediction markets for traders in the UK.
Trading Fees: Zero
In contrast to conventional bookmakers that embed a margin (overround) into every bet, Polymarket employs an AMM-style order book where liquidity providers determine the spread. Polymarket itself does not levy an explicit "vig". Instead, 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 blockchain, requiring gas payments in MATIC that ordinarily range from $0.001 to $0.02 per transaction independent of order value. This represents a substantial saving compared to Ethereum's main chain.
- Opening a position: ~$0.003–0.01
- Closing a position/settlement: ~$0.003–0.01
- Moving USDC to your own wallet: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided unless critical)
Deposit Fees
Sending USDC directly onto Polygon incurs no cost from Polymarket itself. However, your bank or exchange may impose a withdrawal charge to move USDC to Polygon. Coinbase typically charges ~$0.01–1 based on current network load. Opting for the native Polygon USDC network keeps expenses down.
Currency Conversion Costs (GBP ↔ USDC)
UK-based users encounter their greatest expense here. A full cycle of conversion (GBP → USDC → GBP) through a mainstream exchange normally runs 0.5–1.5% in total fees, accounting for the exchange's bid-ask spread.