In this guide
What Are Polymarket's Fees in 2026?
Polymarket does not impose a platform trading fee. Your only expenses are Polygon gas fees (usually below $0.01 per transaction) plus any costs associated with converting USDC into GBP at your chosen exchange. This positions Polymarket among the most cost-efficient prediction markets for participants in the UK.
Trading Fees: Zero
In contrast to conventional bookmakers that embed a margin (overround) into all offered markets, 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 indirectly through pricing, which tightens as additional liquidity enters the market.
Gas Fees on Polygon
Every transaction on Polymarket executes on the Polygon PoS blockchain, with gas costs denominated in MATIC and ranging from $0.001 to $0.02 per transaction independent of your stake size. This represents a substantial saving relative to Ethereum Layer 1 operations.
- 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 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, for instance, typically charges ~$0.01–1 contingent on current network demand. Opting for the native Polygon USDC pathway reduces overall expenditure.
Currency Conversion Costs (GBP ↔ USDC)
For UK-based users, this represents the most significant fee consideration. A full conversion cycle (GBP → USDC → GBP) through a mainstream exchange normally incurs 0.5–1.5% in total costs, encompassing both the bid-ask spread and any intermediary charges.