In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes no trading fee at the platform level. Your only expenses come from Polygon gas fees (usually below $0.01 per trade) plus any currency conversion charges when moving between USDC and GBP. This positions Polymarket as among the most cost-effective prediction markets for traders 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 does not levy a direct "vig" charge. Instead, you encounter the spread implicitly, which tightens as additional liquidity enters the market.
Gas Fees on Polygon
Every transaction on Polymarket executes on the Polygon PoS blockchain, requiring gas payments in MATIC that typically range from $0.001 to $0.02 per transaction independent of stake size. This represents a substantial saving relative to Ethereum Layer 1.
- Opening a position: ~$0.003–0.01
- Closing a position or settling: ~$0.003–0.01
- Transferring USDC to your own wallet: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided except when essential)
Deposit Fees
Sending USDC directly onto Polygon carries no fee from Polymarket's end. However, your bank or exchange may impose a withdrawal charge to facilitate the transfer to Polygon. Coinbase, for instance, typically charges ~$0.01–1 depending on network load. Opting for the Polygon-native USDC route helps keep expenses down.
Currency Conversion Costs (GBP ↔ USDC)
UK-based users encounter the most substantial costs during currency conversion. A full conversion cycle (GBP → USDC → GBP) through a mainstream exchange ordinarily incurs 0.5–1.5% in total fees, encompassing both the exchange margin and the bid-ask spread.