In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes no direct platform trading fee. Your expenditure is limited to Polygon network transaction costs (usually below $0.01 per trade) and any currency conversion charges when exchanging USDC into GBP. This positions Polymarket amongst the most cost-effective prediction markets accessible to traders in the United Kingdom.
Trading Fees: Zero
In contrast to conventional betting operators that embed a margin (overround) into each market, Polymarket operates via an AMM-style order book mechanism where liquidity providers determine the spread. Polymarket itself levies no separate "vig" or commission. You encounter the spread indirectly, which compresses as additional liquidity enters the market.
Gas Fees on Polygon
Every Polymarket transaction executes on the Polygon PoS blockchain, where gas is denominated in MATIC and typically ranges from $0.001 to $0.02 per transaction irrespective of order magnitude. This represents a substantial reduction relative to Ethereum layer-one settlement.
- Opening a position: ~$0.003–0.01
- Closing a position or claiming winnings: ~$0.003–0.01
- Transferring USDC to an external address: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (generally inadvisable)
Deposit Fees
Moving USDC onto Polygon carries no fee from Polymarket's end. Your upstream exchange may impose a withdrawal charge to facilitate USDC transmission to Polygon. Coinbase typically deducts ~$0.01–1 contingent on network load. Routing funds via the native Polygon USDC channel reduces overall expenditure.
Currency Conversion Costs (GBP ↔ USDC)
UK-based participants encounter the most substantial expense at the fiat-to-stablecoin boundary. A complete round-trip conversion cycle (GBP → USDC → GBP) through a mainstream exchange ordinarily incurs 0.5–1.5% in aggregate costs, encompassing the bid-ask differential and associated charges.