In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes zero platform trading fees. Your only expenses are Polygon gas fees (usually below $0.01 per transaction) plus any fees your exchange charges when you swap 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 a margin (overround) into each market, Polymarket operates via an AMM-style order book where liquidity providers determine the spread. Polymarket itself levies no direct "vig" or commission. 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 chain, with gas paid in MATIC and ranging from $0.001 to $0.02 per transaction independent of stake amount. This represents a substantial saving versus Ethereum mainnet costs.
- Opening a position: ~$0.003–0.01
- Closing a position/cashing out: ~$0.003–0.01
- Moving USDC to your own wallet: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided unless essential)
Deposit Fees
Sending USDC directly onto Polygon carries no charge from Polymarket. However, your bank or exchange may impose a withdrawal fee when transferring USDC to Polygon. Coinbase typically deducts ~$0.01–1 based on network load. Opting for the native Polygon USDC pathway keeps your costs down.
Currency Conversion Costs (GBP ↔ USDC)
For UK-based participants, this represents the most significant fee consideration. A full cycle of converting GBP into USDC and back (GBP → USDC → GBP) through a leading exchange normally incurs 0.5–1.5% in total costs, accounting for both the exchange spread and commissions.