In this guide
What Are Polymarket's Fees in 2026?
Polymarket operates without imposing any platform trading fee. Your only expenses come from Polygon gas fees (usually below $0.01 per transaction) and any currency conversion charges when exchanging USDC into GBP. This positions Polymarket amongst the most affordable prediction market options for traders in the UK.
Trading Fees: Zero
In contrast to conventional sportsbooks that embed a margin (overround) into their offerings, Polymarket operates via an AMM-style order book where liquidity providers establish the spread. Polymarket itself does not levy any direct "vig" or commission. You encounter the spread implicitly, which tightens as additional liquidity flows into the market.
Gas Fees on Polygon
Every Polymarket transaction executes on the Polygon PoS blockchain, with gas fees denominated in MATIC and averaging between $0.001 and $0.02 per transaction irrespective of stake magnitude. The cost differential versus Ethereum mainnet is substantial.
- Opening a position: ~$0.003–0.01
- Closing a position or settling: ~$0.003–0.01
- Moving USDC to an external address: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided unless essential)
Deposit Fees
Transferring USDC directly onto Polygon incurs no charge from Polymarket's end. However, your source exchange may apply its own withdrawal fee when moving USDC to Polygon. Coinbase typically deducts ~$0.01–1 contingent on network activity. Opting for the native Polygon USDC pathway reduces your outlay.
Currency Conversion Costs (GBP ↔ USDC)
For UK-based participants, this represents the most tangible expense component. A complete conversion cycle (GBP → USDC → GBP) through a leading exchange ordinarily incurs 0.5–1.5% in total fees, encompassing the bid-ask differential.