Polymarket and Kalshi both offer event contracts that trade like binary outcomes, but they operate under different infrastructure and regulatory constraints.
This comparison focuses on mechanics: regulation, funding rails, settlement, and access.
For the underlying concept, see prediction markets.
Regulatory frameworks and oversight
Kalshi operates as a Designated Contract Market (DCM) regulated by the Commodity Futures Trading Commission (CFTC) in the United States. See Kalshi review.
Polymarket is built around on-chain settlement and stablecoin funding, with access that varies by jurisdiction. See Polymarket review.
Payment and settlement infrastructure
Infrastructure differences affect how participants deposit funds and receive payouts. Kalshi uses the traditional banking system to process transactions in U.S. dollars. Participants fund accounts using bank transfers or ACH payments, and the platform often pays interest on uninvested cash, similar to a traditional brokerage.
Polymarket utilizes blockchain settlement and conducts transactions in stablecoins. Many markets use dollar-pegged stablecoins such as USDC. See stablecoins.
Market categories and availability
The variety of available contracts is influenced by each platform’s regulatory posture. Kalshi offers contracts in categories like economics, politics, weather, and sports. Because it is a regulated exchange, each new contract category must meet specific federal standards, which can influence the speed of new market listings.
Polymarket provides a wide range of global markets, including international politics, cryptocurrency trends, and entertainment. Many of these markets are accessible to a global audience, though users in certain jurisdictions may be restricted from accessing specific event types.
Fee structures and trading costs
Fee models vary based on the trading outcome and the underlying system. Kalshi typically charges fees only on trades that result in a net profit for the participant. There are no separate commissions for entering or exiting a position, and loss-making trades generally do not incur platform fees.
Polymarket’s costs are influenced by the blockchain network. While the platform itself may have specific fee structures, users also encounter network “gas” fees and potential costs related to stablecoin conversions or bridging assets between networks.
Structured Comparison: Polymarket vs. Kalshi
| Dimension | Polymarket | Kalshi |
|---|---|---|
| Regulatory Status | Varies by jurisdiction | CFTC-regulated DCM |
| Primary Currency | USDC (Stablecoin) | U.S. Dollar |
| Account Funding | Crypto wallets / Bridges | Bank transfers (ACH) |
| Geographic Focus | Global / International | United States |
| Interest on Cash | Not typical | Sometimes offered |
| Settlement Basis | On-chain (Polygon) | Centralized exchange |
Geographic access and restrictions
Geographic eligibility is a primary differentiator for participants. Kalshi is designed for U.S. residents and is generally not available in international jurisdictions. Specific state laws within the U.S. may further restrict access to certain products.
Polymarket serves an international audience but can face access restrictions in specific jurisdictions. Eligibility depends on local classification of event contracts and platform policy.
Common misconceptions
A frequent misconception is that one platform is inherently “safer” than the other. All prediction markets involve a risk of capital loss; regulatory oversight provides procedural protections but does not eliminate market risk.
Another misconception is that blockchain makes Polymarket entirely decentralized. While transactions occur on-chain, the platform still manages market listings and resolution rules. Finally, prices can differ between platforms due to unique liquidity conditions; a price on one exchange does not always match the price on another for the same event.
