In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes zero platform trading fees. Your only expenses are Polygon gas costs (usually below $0.01 per transaction) plus any conversion charges when exchanging USDC into GBP. This positions Polymarket among the most cost-effective prediction markets accessible to traders in the UK.
Trading Fees: Zero
In contrast to conventional bookmakers that embed a margin (overround) throughout their offerings, 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, which tightens as additional liquidity flows into the market.
Gas Fees on Polygon
Every Polymarket transaction executes on the Polygon PoS chain, with gas expenses denominated in MATIC and ranging from $0.001 to $0.02 per transaction irrespective of stake magnitude. The savings versus Ethereum mainnet are substantial.
- Opening a position: ~$0.003–0.01
- Closing or settling a position: ~$0.003–0.01
- Transferring USDC to an outside address: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided unless essential)
Deposit Fees
Sending USDC straight to Polygon incurs no cost from Polymarket's end. However, your bank or exchange may impose a withdrawal charge to move USDC onto Polygon. Coinbase typically deducts ~$0.01–1 based on network load. Opting for the native Polygon USDC route keeps expenses down.
Currency Conversion Costs (GBP ↔ USDC)
For UK-based participants, this represents the most substantial outlay. A complete conversion cycle (GBP → USDC → GBP) through a leading exchange normally runs 0.5–1.5% in total fees, accounting for the bid-ask spread.