In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes no direct platform trading fee. Your only expenses consist of Polygon gas fees (usually below $0.01 per transaction) and any currency conversion charges when swapping USDC for GBP. This positions Polymarket amongst the most cost-efficient prediction markets for traders in the UK.
Trading Fees: Zero
In contrast to conventional sportsbooks that embed an overround margin into each market, Polymarket employs an AMM-style order book where liquidity providers establish the spread. Polymarket itself does not levy any explicit "vig". Instead, you encounter the spread implicitly, which tightens as additional liquidity flows into markets.
Gas Fees on Polygon
Every Polymarket transaction executes on the Polygon PoS network, with gas expenses denominated in MATIC and typically ranging from $0.001 to $0.02 per transaction irrespective of stake amount. The savings versus Ethereum mainnet are substantial.
- Opening a position: ~$0.003–0.01
- Closing a position or claiming winnings: ~$0.003–0.01
- Transferring USDC to a separate address: ~$0.005–0.02
- Bridging from Polygon to Ethereum: $5–20 (best avoided unless essential)
Deposit Fees
Sending USDC directly onto Polygon carries no charge from Polymarket itself. However, your bank or exchange may impose a withdrawal fee when moving USDC to the Polygon network. Coinbase typically deducts ~$0.01–1 depending on current network load. Opting for the native Polygon USDC network reduces overall expense.
Currency Conversion Costs (GBP ↔ USDC)
For UK participants, this represents the most substantial fee consideration. A complete conversion cycle (GBP → USDC → GBP) through a leading exchange ordinarily incurs 0.5–1.5% in total costs, factoring in the bid-ask spread.