Polymarket Fees: Complete Breakdown for 2026
Key takeaway: Polymarket charges no explicit trading fee on most trades, but you pay through the bid-ask spread (typically 1-3 cents). Deposits via MoonPay cost 3.5-5%, while crypto deposits cost only gas fees (~$0.01 on Polygon). Withdrawals are free.
Understanding Polymarket fees is essential for calculating your true trading profitability. Unlike traditional bookmakers that embed a 5-15% margin in every bet, Polymarket's fee structure is more transparent — but not zero. Here is every cost you will encounter.
Trading fees
Polymarket uses an order book model (the CLOB — Central Limit Order Book). Fee structure depends on whether you are a maker or taker:
- Maker orders (limit orders that add liquidity): 0% fee
- Taker orders (market orders that remove liquidity): ~1-2% effective fee via spread
- Reward tokens: Active makers can earn MATIC rewards through Polymarket's market-making incentive programme
The hidden cost: bid-ask spread
The real cost of trading on Polymarket is the spread — the gap between the best buy and sell prices. On liquid markets (US elections, major crypto events), spreads are tight: 1-2 cents. On illiquid markets (niche science questions, obscure political outcomes), spreads can balloon to 5-10 cents.
| Market type | Typical spread | Effective cost |
| US elections | 1-2 cents | 1-2% |
| Major crypto | 2-3 cents | 2-3% |
| Sports events | 3-5 cents | 3-5% |
| Niche markets | 5-10+ cents | 5-10%+ |
Deposit costs
How much you pay to fund your account depends on your deposit method:
- MoonPay (credit card): 3.5-5% — convenient but expensive
- Crypto transfer (Polygon USDC): gas fee only, typically under $0.01
- Bridge from Ethereum: $2-15 in ETH gas, plus 10-30 minute wait
Withdrawal costs
Withdrawing USDC from Polymarket to an external wallet is free on the Polygon network. If you want to convert back to fiat, you will pay your exchange's withdrawal fee (typically $1-5 flat).
How PolyGram compares
PolyGram accesses the same Polymarket order book, so trading spreads are identical. Where PolyGram saves you money is the onboarding — streamlined deposits without the high MoonPay markup. Check your transaction history to see exact fees on every trade. Start trading on PolyGram →