Fees

noma is free to use. Here’s how fees work across providers.

Fees

noma charges zero platform fees. No commission, no spread markup, no routing surcharge. On other aggregator platforms, trading fees cost you 1–2% per trade. On noma, every dollar goes toward your position.

noma also covers gas on both Polygon and Solana. You never need MATIC or SOL — only the stablecoin you’re trading with. See Wallet Setup for how gasless trading works.

The providers that execute your trades — Polymarket and Kalshi — set their own taker fees. These are collected by the provider, not by noma, and are the same fees you’d pay trading direct.

What you pay

Provider	Fee model	Shown in price?
Polymarket	Probability-weighted taker fee, varies by market category	Deducted from shares received
Kalshi (via DFlow)	Probability-weighted taker fee, based on builder tier	Included in execution price

Both providers use the same core idea: fees are highest when an outcome is near 50/50 and shrink as a market approaches certainty. Makers (limit orders that add liquidity) pay no fees on either provider.

Polymarket fees

Polymarket charges taker fees that vary by market category — crypto, sports, politics, and others each have different rates. Fees are deducted in shares, not USDC. You pay the listed price, but receive slightly fewer shares.

Geopolitical markets are fee-free.

Full details: Polymarket fee documentation

Kalshi fees (via DFlow)

Kalshi markets are accessed through DFlow’s trading infrastructure. Fees are baked into the execution price — the price you see in your order summary is what you pay, fees included.

Full details: DFlow fee documentation

Deposits and withdrawals

No fees on deposits or withdrawals.