In this guide
What Are Polymarket's Fees in 2026?
Polymarket does not levy any platform trading fee. Your only expenses come from Polygon gas fees (usually below $0.01 per transaction) and fees charged by your exchange when you convert between USDC and 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 embed a margin (overround) into their markets, Polymarket operates using an AMM-style order book where liquidity providers determine the spread. Polymarket itself does not charge an explicit "vig". Instead, you encounter the spread implicitly, which tightens as the market draws additional liquidity.
Gas Fees on Polygon
Every transaction on Polymarket executes on the Polygon PoS blockchain, with gas fees denominated in MATIC and generally ranging from $0.001 to $0.02 per transaction independent of your position value. This represents a substantial saving compared to Ethereum's main chain.
- Opening a position: ~$0.003–0.01
- Closing a position or claiming winnings: ~$0.003–0.01
- Moving USDC out to another address: ~$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 itself. However, your bank or crypto exchange may impose a fee when transferring USDC to Polygon. Coinbase typically charges ~$0.01–1 based on current network activity. Opting for USDC on the Polygon network directly keeps your expenses down.
Currency Conversion Costs (GBP ↔ USDC)
For UK participants, currency conversion represents the most substantial fee consideration. A complete conversion cycle (GBP → USDC → GBP) through a mainstream exchange typically runs 0.5–1.5% in total fees, accounting for the exchange's bid-ask spread.