In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes no platform trading fee whatsoever. Your sole expenses are Polygon gas fees (usually below $0.01 per transaction) plus any conversion costs when exchanging USDC into GBP. This positions Polymarket amongst the most cost-effective prediction markets for traders in the United Kingdom.
Trading Fees: Zero
In contrast to conventional bookmakers that embed an 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 as an implicit cost, which tightens as additional liquidity flows into markets.
Gas Fees on Polygon
Every transaction on Polymarket executes on the Polygon PoS blockchain, with gas fees denominated in MATIC and ranging from $0.001 to $0.02 per transaction irrespective of order magnitude. This represents a substantial saving relative to Ethereum layer-one costs.
- Opening a position: ~$0.003–0.01
- Closing a position or claiming winnings: ~$0.003–0.01
- Moving USDC to your own wallet: ~$0.005–0.02
- Cross-chain transfer (Polygon to Ethereum): $5–20 (generally inadvisable)
Deposit Fees
Transferring USDC onto Polygon carries no charge from Polymarket itself. However, your bank or exchange may impose a withdrawal fee when moving USDC to Polygon's network. Coinbase typically charges ~$0.01–1 depending on current network activity. Opting for the native Polygon USDC route keeps expenses low.
Currency Conversion Costs (GBP ↔ USDC)
For UK-based users, this represents the most substantial fee component. A full cycle of conversion (GBP to USDC and back to GBP) through a mainstream exchange ordinarily incurs 0.5–1.5% in total costs, encompassing the bid-ask spread.