In this guide
What Are Polymarket's Fees in 2026?
Polymarket does not impose any platform trading fee. Your only expenses consist of Polygon gas fees (usually less than $0.01 per transaction) plus any fees incurred when converting USDC into GBP. This positions Polymarket amongst the most affordable prediction markets for traders in the UK.
Trading Fees: Zero
In contrast to conventional sportsbooks that embed an overround margin into their markets, Polymarket operates via an AMM-style order book wherein liquidity providers determine the spread. Polymarket itself does not levy any direct "vig" charge. You encounter the spread indirectly, which tightens as additional liquidity enters the market.
Gas Fees on Polygon
Every transaction on Polymarket executes on the Polygon PoS network, requiring gas payments denominated in MATIC that generally fall between $0.001 and $0.02 per transaction independent of order magnitude. This represents a substantial saving relative to Ethereum mainnet costs.
- Opening a position: ~$0.003–0.01
- Closing a position or collecting winnings: ~$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's perspective. However, your bank or exchange may impose a fee when transferring USDC to the Polygon network. Coinbase typically charges ~$0.01–1 contingent on network load. Opting for the native Polygon USDC network reduces your overall expenditure.
Currency Conversion Costs (GBP ↔ USDC)
UK-based participants encounter their most substantial cost at the conversion stage. A complete conversion cycle (GBP → USDC → GBP) through a leading exchange normally incurs 0.5–1.5% in total fees, encompassing both the exchange margin and the bid-ask spread.