Kalshi vs Polymarket 2026: Which Is Better?
Both are CFTC-regulated U.S. prediction markets and both are legal in Florida. The differences are in market mix, fee structure, and deposit rails — here's how to choose.
- Sports-first trader: Kalshi tends to be the more natural starting point.
- Politics-first or crypto-first trader: Polymarket has traditionally had the deeper book.
- Weather / hurricane trader: Kalshi is the only one of the two with weather contracts today.
- Active multi-category trader: open both. Cross-platform price gaps on identical events are a recurring source of edge.
Polymarket and Kalshi are the two CFTC-registered prediction markets serving U.S. retail traders in 2026. Both are legal in Florida. Both operate as Designated Contract Markets. The choice between them — or whether to run both — comes down to which markets you want to trade, how you prefer to fund, and how the fee math works for your typical trade size.
| Feature | Kalshi | Polymarket |
|---|---|---|
| Regulator | CFTC DCM | CFTC DCM (via QCX) |
| U.S. relaunch path | Native U.S. since launch | Returned via $112M QCX acquisition, July 2025 |
| Sports breadth | Broad | Growing, with deep NFL/Super Bowl |
| Politics breadth | Solid | Historically the deepest political book |
| Crypto markets | Available | Historically the deepest crypto book |
| Weather / hurricanes | Yes | No |
| Deposit rails | ACH, debit, wire | ACH, debit, USDC |
| Fee structure | Formula: 7¢ × C(1−C) per contract | Formula: Θ × C × p × (1−p), Θ=0.05 taker |
| Florida access | Full | Full |
Fees, explained simply
Both platforms use probability-weighted fee formulas rather than flat rates — fees are largest on markets close to 50¢ (most uncertain) and shrink toward zero on lopsided outcomes. Kalshi's published taker fee formula is 7¢ × C × (1−C) per contract, capped near 1.75¢ at 50¢. Polymarket US's taker formula uses a coefficient of 0.05 in Θ × C × p × (1−p), with a per-100-contract cap published in the company's fee schedule. The exact wording, parameters, and caps are at kalshi.com/fee-schedule and docs.polymarket.us/fees.
Which to open first
- •Sports-first trader: Kalshi tends to be the more natural starting point.
- •Politics-first or crypto-first trader: Polymarket has traditionally had the deeper book.
- •Weather / hurricane trader: Kalshi is the only one of the two with weather contracts today.
- •Active multi-category trader: open both. Cross-platform price gaps on identical events are a recurring source of edge.
Florida-specific
Both are accessible to Florida residents. Neither operates under the Florida-Seminole sports-betting compact. Both are funded via U.S. bank rails (ACH or debit) and both let you withdraw to a Florida bank without state-specific friction.
Side-by-side at a glance
| Kalshi | Polymarket US | |
|---|---|---|
| Regulatory status | CFTC-registered Designated Contract Market | Trades through CFTC-registered QCX, acquired July 2025 |
| Funding | ACH, debit, wire | ACH, debit, USDC |
| Typical strengths | Weather, economics, wide sports coverage | Politics, crypto, geopolitics, long-tail contracts |
| Florida availability | Available statewide | Available statewide |
Which one to open first
If most of your interest is in sports, economic data or hurricane contracts, Kalshi's coverage is deeper. If you want political, geopolitical and crypto markets — including long-tail contracts that no sportsbook would list — Polymarket has the broader catalogue. Many active Florida traders keep accounts on both and route each trade to whichever venue quotes the better price on that specific contract.
Costs and execution
Both charge a trading fee that scales with how close the contract trades to 50¢, and neither charges an account or inactivity fee. The bigger practical difference is usually liquidity per contract: the same event can have a tight book on one venue and a wide one on the other, so check depth before you size a position.
Frequently Asked Questions
Kalshi is a CFTC-regulated event-contract exchange where you trade Yes/No on real-world outcomes — sports, politics, weather, economics — at peer-to-peer prices.
Related guides
Pillar pages
Sources & references
- 1.KalshiEX LLC — DCM Registration — CFTC.gov
- 2.Polymarket Announces Acquisition of QCX (CFTC-Registered DCM) — PRNewswire / Polymarket
- 3.Kalshi — Fee Schedule — Kalshi
- 4.Polymarket US — Fee Schedule — Polymarket Docs
- 5.Commodity Futures Trading Commission — Event Contracts — CFTC.gov
External links open in a new tab. We cite primary regulatory and major news sources where possible. Citations to trusted regulators (CFTC, SEC, IRS, NOAA, .gov, .edu) are dofollow; commercial outbound links are not endorsements.
Catie Di Stefano has spent 15 years working with online gambling across some of the most regulated and competitive gambling markets in the world.
Starting at Betsson Group in Malta in 2011, she has in recent years worked her way through VIP management, CRM, gamification and marketing leadership across European and North American operations. Catie was a licensed consultancy for Hard Rock Casino in New Jersey, where she held a DGE vendor license and owned the execution of the online CRM program from launch day in 2018.