In this guide
What Are Polymarket's Fees in 2026?
Polymarket imposes no direct platform trading charges. Your only expenses are Polygon network gas costs (usually below $0.01 per trade) plus any fees levied by your exchange when you swap between USDC and GBP. This positions Polymarket amongst the most cost-effective prediction market platforms for traders based in the UK.
Trading Fees: Zero
In contrast to conventional betting operators that embed a margin (overround) into all their markets, Polymarket operates via an AMM-style order book where liquidity providers determine the spread. Polymarket itself does not levy a separate "vig" charge. Instead, you encounter the spread implicitly, which tightens as additional liquidity flows into the market.
Gas Fees on Polygon
Every transaction on Polymarket executes across the Polygon PoS blockchain, with gas expenses denominated in MATIC and ranging from $0.001 to $0.02 per operation irrespective of your stake amount. This represents a substantial saving versus transacting on the Ethereum main chain.
- Opening a position: ~$0.003–0.01
- Closing or settling a position: ~$0.003–0.01
- Moving USDC from Polygon 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 carries no fee from Polymarket's end. However, your bank or exchange may impose a withdrawal charge to facilitate the transfer of USDC to Polygon. Coinbase, for instance, typically charges ~$0.01–1 depending on current network load. Opting for the native Polygon USDC route keeps your outgoings down.
Currency Conversion Costs (GBP ↔ USDC)
For UK-based participants, this represents the most substantial fee consideration. A complete two-way conversion cycle (GBP → USDC → GBP) through a leading exchange typically runs 0.5–1.5%, encompassing both the exchange margin and the bid-ask spread.