Kalshi is a regulated prediction market exchange where UK users can trade yes/no contracts on real-world events: elections, Fed rate decisions, sports outcomes, economic data, and more. Every contract settles at exactly £1 or £0, and the price you see is the crowd's real-time probability estimate. Getting started takes about three minutes.
Every market on the platform is a question with a measurable answer. "Will the Fed cut rates in September?" or "Will BTC close above £65,000 today?" You buy a Yes or No contract. The price trades between £0.01 and £0.99, and that number is also the market's probability estimate. A contract at £0.43 means the crowd thinks there is a 43% chance the event happens.
When the event resolves, every winning contract pays £1.00. Losing contracts pay £0. You can also sell before resolution if the market moves in your favour. This is what separates a Kalshi prediction market from a standard bet: there is a live order book, and you can exit positions at any point during trading hours.
Markets currently active on the platform:
UK users can sign up and start trading in under five minutes. Here is exactly how it works:
Sign up at kalshi-uk.org and claim your welcome bonus!
Kalshi runs an active referral and incentive programme. New users who sign up through the incentives page can access the current welcome offer, which has historically included up to £10 in credit plus a referral bonus for both parties. Offers do change, so check the live deal at sign-up rather than relying on third-party codes that may be outdated.
Kalshi trading fees are not a flat percentage. The fee per contract depends on the contract price and follows the formula: 0.07 × price × (1 − price). Contracts near the extremes of the price range cost almost nothing to trade. Contracts near £0.50 carry the highest fee, capped at £1.75 per 100 contracts.
| Contract price | Taker fee per contract | In plain terms |
|---|---|---|
| £0.01–£0.02 / £0.98–£0.99 | £0.00 | Near-certain or near-impossible outcomes trade free |
| £0.10 / £0.90 | ~£0.006 | Strong lean either way: fraction of a cent per contract |
| £0.30 / £0.70 | ~£0.015 | Moderate probability: still very low cost |
| £0.50 | ~£0.0175 | Coin-flip markets: highest fee, £1.75 per 100 contracts max |
Maker fees (limit orders that rest on the book) are lower than taker fees and only charged on execution. Cancelling an unfilled order is always free. ACH and wire deposits and withdrawals carry no platform fee. Debit card transactions include a 2% processing fee. Crypto deposits have no platform fee, though standard network costs apply.
For context, traditional bookmakers typically embed a 5–10% margin in the odds. For high-probability or low-probability events, Kalshi's cost structure is significantly cheaper.
Prices on the platform are expressed in cents, not in fractional or decimal odds. The price and the probability are the same number, which makes it easier to spot value. Here is how that looks in practice:
| Contract price | Market-implied probability | Payout if correct | Profit per contract |
|---|---|---|---|
| £0.20 | 20% chance | £1.00 | £0.80 |
| £0.50 | 50% chance | £1.00 | £0.50 |
| £0.75 | 75% chance | £1.00 | £0.25 |
| £0.92 | 92% chance | £1.00 | £0.08 |
If you think an event has a 75% chance of happening and the contract trades at £0.55, the gap between your estimate and the market price is your edge. Volume is the other signal to watch: a market with £7 million traded is far more reliable than one with £300 in volume.
Here is what users say across app stores and prediction market communities:
Traded near-certain outcomes at basically zero fee. Nothing comes close for that use case.
Live in-game markets are 🔥 Faster than any sportsbook I've used.
I track Fed decisions here every meeting. Best read on market consensus I've found.
Perps volume is growing fast. UI could use work but the product itself is solid.
Technically, Kalshi sports betting is not a phrase the company uses. The platform offers event contracts on sports outcomes, regulated by the CFTC as financial instruments, not wagers. In practice, you take a position on whether a team wins, a player hits a target, or a match goes a certain way.
Sports markets now account for more than 90% of platform volume and revenue. What is available:
Tarek Mansour (CEO) and Luana Lopes Lara (COO) are the Kalshi founders. They met as students at MIT, both took finance roles at major institutions, and noticed that a large portion of trading activity was ultimately driven by opinions on future events. They built Kalshi to make that direct and regulated.
Luana became the world's youngest self-made woman billionaire in December 2025 after the company raised £1 billion at an £11 billion valuation. A second round in 2026 pushed the Kalshi valuation to £22 billion. Both founders hold roughly 12% of the company each.
Yes. In November 2020, Kalshi became the first company to receive a Designated Contract Market (DCM) licence from the US Commodity Futures Trading Commission. That is the same regulatory body that oversees US futures exchanges. Customer funds are held separately from operating funds, as required by CFTC rules.
Tarek Mansour and Luana Lopes Lara are the Kalshi founders, both MIT graduates who previously worked at Goldman Sachs, Citadel, and Bridgewater. The platform has raised £2.8 billion across 11 funding rounds, with backing from Sequoia Capital, Andreessen Horowitz, Coatue, and Morgan Stanley. The Kalshi valuation reached £22 billion in 2026. It now powers prediction market integrations inside Robinhood and Coinbase.
Yes. Kalshi is available to UK users and British traders can register, fund an account, and start trading event contracts on the platform. The sign-up process is straightforward: you need a valid email, phone number, and a government-issued ID for identity verification. The full process takes under five minutes.
A UK version of Kalshi gives British users access to the same 500+ markets as the main platform: sports, elections, economics, crypto, and more. Deposits work via ACH transfer, wire, debit card, or crypto. Everything is denominated in USD, so your deposits convert at the current exchange rate when you fund your account.
The Kalshi app is available on iOS and Android and carries the full feature set: live order book, portfolio tracking, push notifications on specific contracts, and access to all 500+ active markets. British traders can download the Kalshi app UK version from the App Store or Google Play and sign up directly from their phone. The mobile experience is identical to the web platform in terms of market access, order types, and portfolio management.
Get the Kalshi app now and enjoy non-stop action.
The Kalshi meaning has not been officially explained by the founders. The name does not carry a specific meaning in English or in their native languages. It appears to function as an invented brand name for the platform.
Winning contracts settle automatically at $1.00. The payout lands in your Kalshi account balance immediately after resolution, with no manual claim needed. From there you can withdraw via ACH, wire transfer, or debit card, or leave the balance in your account to trade with.
Most Kalshi trades cost well under 1% of stake. Contracts priced near £0.01 or £0.99 carry zero fees. Traditional bookmakers embed 5-10% margin in the odds. For any high-probability or low-probability event, Kalshi's cost structure is considerably cheaper.
The platform charges a transaction fee on each trade based on the contract price. That fee is the spread between what you pay and what the contract could return. There are no hidden fees, no subscription costs, and no charges on unexecuted orders.
