In this guide
What Are Polymarket's Fees in 2026?
Polymarket does not impose any platform trading fee. Your only expenses are Polygon gas fees (usually under $0.01 per transaction) and potential exchange charges when you convert USDC to GBP. This positions Polymarket among the most cost-effective prediction markets for traders in the UK.
Trading Fees: Zero
In contrast to conventional sportsbooks that embed a margin (overround) into each market, Polymarket operates via an AMM-style order book where liquidity providers determine the spread. Polymarket itself does not levy an explicit "vig". You encounter the spread indirectly, which tightens as markets receive greater liquidity.
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 compared to Ethereum mainnet fees.
- 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
Moving USDC onto Polygon incurs no cost from Polymarket. However, your exchange provider may impose a withdrawal fee to transfer USDC to Polygon. Coinbase typically charges ~$0.01–1 contingent on network load. Opting for the native Polygon USDC network reduces your overall expense.
Currency Conversion Costs (GBP ↔ USDC)
UK-based users encounter the most substantial cost at this conversion stage. A typical round-trip conversion (GBP → USDC → GBP) through a mainstream exchange runs 0.5–1.5% in total fees, factoring in the exchange margin.