Verdict
TL;DR
Polymarket is the deepest prediction market in the world by volume, and its on-chain settlement is trustworthy. If you're outside the US it's the default venue. If you're in the US, check current CFTC-registered access and consider Kalshi as an alternative.
Fees & liquidity
What it actually costs to trade
- Trading fee: 0%. You pay the bid/ask spread and Polygon gas (fractions of a cent).
- Deposit: free via USDC bridge; small processor fee for card/Apple Pay funding.
- Withdrawal: free on-chain; card withdrawals carry a network fee.
- Liquidity: flagship markets (US elections, BTC price, major sports) have millions in depth. The long tail is thin — spreads widen fast.
Regulation
CFTC status and US legality
In 2022 the CFTC fined Polymarket $1.4M for offering unregistered swaps to US persons and required it to wind down US access. Since then Polymarket has pursued CFTC-registered pathways for compliant US markets. Coverage in 2026 is partial and depends on state and market type.
Outside the US, Polymarket operates in 100+ countries. Users self-serve via the website and Polygon smart wallet.
Pros
What Polymarket does better than anyone
- Deepest liquidity in prediction markets — by a lot.
- Zero trading fee, on-chain and non-custodial.
- Fast product velocity — new markets go live within hours of news.
- Sellable positions before resolution.
Cons
Where it falls short
- US access is partial and evolving.
- Oracle disputes can delay payouts on contested markets.
- Long-tail markets are thin — spreads and slippage are real costs.
- Learning curve for on-chain concepts, even with card funding.
Head-to-head against the CFTC-regulated US alternative in the Polymarket vs Kalshi comparison.
FAQ