In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes no trading platform fee. Your expenditure is limited to Polygon gas fees (usually under $0.01 per transaction) and potential currency conversion charges when exchanging USDC to GBP. This positions Polymarket amongst the most economical prediction market platforms 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 any direct "vig" or commission. You encounter the spread indirectly, which tightens as additional liquidity enters the market.
Gas Fees on Polygon
Every Polymarket transaction executes on the Polygon PoS blockchain, incurring gas fees denominated in MATIC that range from $0.001 to $0.02 per transaction irrespective of stake magnitude. This represents a substantial saving compared to operating on the Ethereum main chain.
- Opening a position: ~$0.003–0.01
- Closing a position or claiming winnings: ~$0.003–0.01
- Transferring USDC to an external account: ~$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 a withdrawal fee when transferring USDC to the Polygon network. Coinbase typically charges ~$0.01–1 depending on network activity levels. Opting for the native Polygon USDC network keeps your costs down.
Currency Conversion Costs (GBP ↔ USDC)
UK-based users encounter the most substantial expense at the conversion stage. Converting between GBP and USDC and back (GBP → USDC → GBP) through a mainstream exchange normally incurs 0.5–1.5% in total fees, accounting for the bid-ask spread.