Polymarket vs Kalshi: Which Prediction Market Is Better for Political Bettors in 2026?

The quick verdict

Most readers arriving here are trying to answer one of two questions: "Is Polymarket or Kalshi better?" or "Which one am I actually allowed to use?" The second question answers the first. If you are a US resident, Kalshi is the correct platform — it is legal, regulated, and carries explicit contracts for most major US political events. If you are not in the US, Polymarket's depth and breadth are hard to beat.

The remainder of this piece walks through the differences that matter in practice: market breadth, liquidity, fee structure, settlement reliability, and user experience.

Regulatory status: the only answer that matters for US traders

Polymarket settled with the CFTC in 2022 over operating as an unregistered derivatives exchange. Since then, it has been blocked for US IP addresses. The platform continues to grow internationally and has remained the largest prediction market by open interest and trading volume worldwide, but it is not legally available to US residents. We do not recommend VPN use to circumvent the block; that is between each reader and the platforms' terms of service, and it creates real risk around KYC, withdrawal, and taxation.

Kalshi is a registered Designated Contract Market (DCM) under CFTC oversight — the same category of license that CME and ICE hold for commodities futures. This matters because:

1. It is legal everywhere in the US. No state restrictions, no regulatory ambiguity.
2. Withdrawals and deposits use standard US banking rails. No crypto bridge, no offshore transfer.
3. Disputes have a regulatory backstop. If Kalshi behaves badly, the CFTC is the body that rules on it.
4. US tax reporting is straightforward. Contracts settle in USD; 1099s are generated for traders above the reporting threshold.

For US traders, these four points outweigh any liquidity-depth advantage Polymarket might offer on a given market.

Political market coverage

Historically Polymarket covered a much broader range of political events than Kalshi. That gap has narrowed meaningfully in 2025–2026 after a series of court rulings clarified Kalshi's authority to list explicit election contracts.

As of April 2026, Kalshi lists contracts on:

• 2026 Senate control (ticker: SENATE-2026)
• 2026 House control
• 2028 presidential winner
• 2028 party-control (which party wins)
• Select 2026 state races (governors, select Senate races)
• Fed funds rate decisions (monthly meetings)
• CPI, unemployment, GDP prints
• Government shutdown windows
• Supreme Court justice confirmations

Polymarket's political coverage is still deeper for:

• State-by-state Senate races (all 35 seats up in 2026)
• Non-US elections (UK, Canada, Germany, France, Brazil, India, Mexico, Australia, South Korea)
• Mayoral races in major cities (NYC, LA, Chicago, Houston, Philadelphia)
• Niche speculation markets (VP picks, cabinet appointments, debate moderators)

Rule of thumb: if you are trading a major national US contract, both platforms list it. If you want to trade a state-legislature race in Wisconsin or the French presidential runoff, Polymarket is your only venue.

Liquidity and spreads

Liquidity matters for two reasons: tight spreads reduce your entry cost, and deep order books let you scale a position without moving the price.

On the top US presidential markets, Polymarket has historically been 2–5x Kalshi's daily volume. On 2026 Senate and House control markets, that gap has compressed to roughly 1.5–2x — still in Polymarket's favor but narrowing as Kalshi wins US flow.

For state-level and niche political markets, Polymarket usually wins on liquidity by a wide margin. Kalshi's coverage is still expanding.

Fees

Polymarket charges trading fees embedded in the spread and a settlement fee on resolution; Kalshi charges a per-fill fee proportional to the YES × NO price, with a minimum per contract. The exact numbers shift as both platforms tune pricing to compete.

Back-of-envelope: on a $100 position in a market priced near 50/50, expect to pay $0.50–$2.00 in round-trip fees on either platform. At the margins where one platform prices slightly more favorably than the other for a specific trade, the savings rarely exceed 1% of position size — not enough to outweigh the regulatory and UX factors.

See our live methodology page on Kalshi's fee structure for the current numbers.

Settlement and resolution

Both platforms resolve markets using publicly verifiable sources:

• AP calls for election winners
• Federal Register entries for regulatory decisions
• Official court filings for legal outcomes
• BLS data releases for economic indicators

Each contract on either platform publishes its resolution source before trading opens. In practice, resolution disputes on either platform are rare; both have arbitration procedures for edge cases (e.g., a contested election, an ambiguous Fed statement).

Polymarket's resolution is handled via the UMA optimistic oracle — the outcome is proposed, challenged if disputed, and finalized after a review window. Kalshi's resolution is handled internally with CFTC oversight. Both have functioned well for major political contracts.

User experience

Polymarket's interface is polished, mobile-first, and optimized for discovery — browsing its politics hub feels more like scrolling a news site than placing a trade. Charts are smooth, market pages include social-style commentary, and the order flow is frictionless.

Kalshi's interface is more spartan and trading-first. Price ladders, order books, and fill history are prominent; the market page feels closer to a traditional brokerage. For active traders, Kalshi's UX is actually preferred. For casual readers checking in on odds, Polymarket's polish is the better fit.

Which one does Political Forecasts recommend?

We recommend based on user location, not partisanship or editorial preference:

• US residents → Kalshi. It is the only legal, regulated option.
• Non-US residents → Polymarket. Deeper liquidity, broader coverage, more markets.
• Both, when possible. On major US races, both platforms price the same outcome. Comparing the two is a useful check on market consensus. Divergences (rare but real) can flag illiquidity or regional information asymmetry.

Every race page on this site surfaces both platforms when both list the market. Our referral links to Kalshi and Polymarket are how the site is funded — we earn a revenue share on the fees your trades pay the platform. Editorial coverage is not adjusted for which platform pays more; we cover every major market regardless of referral availability. Full disclosure: /disclosure.

FAQ

Is Polymarket legal in the US? No. Polymarket blocks US IPs following a 2022 CFTC settlement.

Is Kalshi legal in the US? Yes. Kalshi is a CFTC-regulated Designated Contract Market, legal in all 50 states.

Does Kalshi list 2028 presidential markets? Yes, since late 2024. See our 2028 page for the current Kalshi-implied odds alongside Polymarket.

Which platform has better election-accuracy track record? Both tracked 2024 well; Polymarket had Trump favored earlier in the cycle than most polling aggregators. For calibration data, see /methodology/our-track-record.