In this guide
What Are Polymarket's Fees in 2026?
Polymarket does not levy any platform trading fee. Your only expenses are Polygon gas fees (usually below $0.01 per transaction) plus any currency conversion costs when exchanging 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 does not impose a 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, where gas fees are denominated in MATIC and range from $0.001 to $0.02 per transaction irrespective of your stake amount. This represents a substantial saving relative to Ethereum's main chain.
- Opening a position: ~$0.003–0.01
- Closing a position or claiming winnings: ~$0.003–0.01
- Moving USDC to your personal wallet: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided unless critical)
Deposit Fees
Sending USDC directly onto Polygon incurs no charge from Polymarket. However, your bank or exchange may impose a withdrawal fee to transfer USDC to the Polygon network. Coinbase typically charges ~$0.01–1 based on current network load. Opting for the native Polygon USDC route keeps expenses down.
Currency Conversion Costs (GBP ↔ USDC)
For UK-based participants, currency conversion represents the most substantial fee consideration. A complete conversion cycle (GBP → USDC → GBP) through a leading exchange typically runs 0.5–1.5% in total fees, encompassing the bid-ask spread.