In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes zero platform trading fees. Your only expenses are Polygon network gas fees (usually below $0.01 per trade) plus any fees incurred when you convert USDC into GBP. This positions Polymarket amongst the most cost-efficient prediction markets accessible to 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 levies no direct "vig" or commission. You encounter the spread indirectly, which tightens as additional liquidity flows into markets.
Gas Fees on Polygon
Every transaction on Polymarket executes on the Polygon PoS chain, with gas costs denominated in MATIC and ranging from $0.001 to $0.02 per transaction irrespective of trade volume. This represents a substantial saving compared to Ethereum layer one.
- Opening a position: ~$0.003–0.01
- Closing or settling a position: ~$0.003–0.01
- Moving USDC out to your own wallet: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided unless critical)
Deposit Fees
Sending USDC directly onto Polygon carries no Polymarket charges. However, your bank or exchange may deduct a fee when transferring USDC to the Polygon network. Coinbase typically charges ~$0.01–1 based on current network load. Opting for the Polygon-native USDC option keeps your costs down.
Currency Conversion Costs (GBP ↔ USDC)
For UK-based participants, this represents the most substantial fee consideration. A complete cycle of converting GBP to USDC and back again through an established platform normally runs 0.5–1.5% in total charges, factoring in the bid-ask spread.