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 below $0.01 per transaction) and any fees incurred when exchanging USDC into GBP. This positions Polymarket amongst the most cost-effective prediction markets for traders in the UK.
Trading Fees: Zero
In contrast to conventional sportsbooks that incorporate an overround into their odds, Polymarket operates via an AMM-style order book where liquidity providers determine the spread. Polymarket itself levies no direct "vig" or commission. Instead, you encounter the spread as an implicit cost, which tightens as additional liquidity flows into the market.
Gas Fees on Polygon
Every transaction on Polymarket executes on the Polygon PoS blockchain, with gas paid in MATIC and costing between $0.001 and $0.02 per transaction irrespective of your stake size. The savings versus Ethereum mainnet are substantial.
- Opening a position: ~$0.003–0.01
- Closing a position or settling: ~$0.003–0.01
- Moving USDC to your personal wallet: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided unless essential)
Deposit Fees
Sending USDC directly onto Polygon incurs no charge from Polymarket. However, your bank or exchange may impose its own withdrawal fee when transferring USDC to the Polygon network. Coinbase, for instance, typically charges ~$0.01–1 depending on network load. Opting for the native Polygon USDC network helps keep your costs down.
Currency Conversion Costs (GBP ↔ USDC)
For UK-based participants, currency conversion represents the most significant fee consideration. A full cycle of converting GBP into USDC and back again through a mainstream exchange normally runs 0.5–1.5% in total fees, accounting for both the bid-ask spread and exchange margin.