In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes no direct platform trading fee. Your actual outgoings consist solely of Polygon gas fees (usually below $0.01 per trade) plus any costs incurred when exchanging USDC into GBP. This positions Polymarket amongst the most cost-effective prediction markets for traders in the UK.
Trading Fees: Zero
In contrast to conventional bookmakers that embed an overround margin into their offerings, Polymarket operates via an AMM-style order book where liquidity providers determine the spread. Polymarket itself levies no separate "vig" or commission. Instead, you encounter the spread as an implicit cost, which tightens as additional liquidity enters the market.
Gas Fees on Polygon
Every Polymarket transaction executes on the Polygon PoS chain, with gas expenses denominated in MATIC and ranging from roughly $0.001 to $0.02 per transaction independent of stake size. This represents a substantial reduction compared to Ethereum Layer 1 costs.
- Opening a trade: ~$0.003–0.01
- Closing or settling a trade: ~$0.003–0.01
- Moving USDC to an external address: ~$0.005–0.02
- Cross-chain transfer (Polygon → Ethereum): $5–20 (best avoided unless critical)
Deposit Fees
Sending USDC directly onto Polygon incurs no charge from Polymarket itself. However, your bank or exchange may impose a fee when transferring USDC to the Polygon network. Coinbase, for instance, typically charges ~$0.01–1 contingent on network load. Opting for the native Polygon USDC route keeps expenses down.
Currency Conversion Costs (GBP ↔ USDC)
For UK participants, this represents the most substantial expense category. A complete conversion cycle (GBP → USDC → GBP) through a mainstream exchange generally runs 0.5–1.5%, encompassing both the bid-ask spread and associated fees.