Kalshi launched in 2021 as the first CFTC-regulated prediction market exchange in the United States. While Polymarket operates as a decentralised, crypto-native platform, Kalshi went the other direction entirely — full federal regulatory approval, fiat deposits, and a user experience closer to a conventional financial product.
That regulatory rigour matters a great deal. But for UK users, it creates an immediate question: does Kalshi’s US focus mean British traders can’t access it?
The answer is nuanced. Here’s exactly where things stand in 2026.
What Is Kalshi?
Kalshi is a regulated event contract exchange, headquartered in New York and regulated by the US Commodity Futures Trading Commission (CFTC). That’s a meaningful distinction from Polymarket. While Polymarket sits in a regulatory grey area — technically offshore, using USDC on Polygon, with no direct CFTC registration — Kalshi operates as a properly authorised US financial exchange.
The practical implication: Kalshi can offer contracts on elections, macroeconomic data, interest rates, weather events, and more, with the backing of a regulatory framework that treats prediction contracts as legitimate financial instruments. There’s no equivalent in the UK yet.
In terms of product: you buy binary event contracts (YES/NO), priced in US cents (0–100), which pay $1 if correct and $0 if not. The interface is cleaner than Polymarket. Fiat USD deposits via ACH. No MetaMask, no USDC, no crypto wallet required.
Can UK Users Access Kalshi?
As of 2026, Kalshi explicitly restricts access to US residents only. Their terms of service require account holders to be US persons — specifically, US citizens or legal residents with a valid Social Security Number.
UK users who try to sign up will hit an identity verification wall. Kalshi uses standard US KYC processes (SSN, US address, US bank account for ACH deposits). Without these, you cannot open a funded account.
This is the core difference from Polymarket. Polymarket is accessible from the UK because it’s a non-custodial, blockchain-based protocol — there’s no central company doing KYC on every user. Kalshi is the opposite: it’s a licensed exchange with strict identity requirements.
Bottom line: Kalshi is not currently accessible to UK users for real-money trading. If you’re based in the UK, your practical options remain Polymarket and a handful of smaller decentralised alternatives.
Kalshi vs Polymarket: Key Differences
Understanding Kalshi is still useful for UK traders because it helps calibrate what a “good” prediction market looks like, and because Kalshi’s prices are a strong signal source (more on that below).
| Feature | Kalshi | Polymarket |
|---|---|---|
| Regulation | CFTC-regulated | Unregulated (offshore) |
| UK access | ❌ No | ✅ Yes |
| Deposit method | USD via ACH bank transfer | USDC (crypto) |
| Market types | Elections, macro data, weather | Broad — anything |
| Resolution | Legally binding contracts | Smart contract + designated resolver |
| Price signal quality | High (institutional liquidity) | High (large retail/pro liquidity) |
For UK users, Kalshi’s most practical value in 2026 is as a price reference signal. Sophisticated Polymarket traders cross-reference Kalshi prices on matching events (Fed rate decisions, elections) to spot divergences. A 10+ percentage point gap between Kalshi and Polymarket on the same event is often a signal worth acting on.
If you want to get started on Polymarket with UK-bought USDC, Coinbase is the most straightforward way for UK users to buy USDC via Faster Payments .
What Markets Does Kalshi Offer?
Even though you can’t trade it from the UK, it’s worth understanding Kalshi’s market structure — particularly because several data providers and signal tools now pull Kalshi prices alongside Polymarket data.
Kalshi’s main categories:
Macroeconomic events — Federal Reserve rate decisions, CPI prints, jobs reports, GDP estimates. These are among the most liquid and most signal-rich markets on the platform.
Elections and politics — US-focused: Presidential, Senate, House, gubernatorial races. During the 2024 US election, Kalshi processed over $200 million in contracts.
Finance — S&P 500 closing range, Bitcoin end-of-day price brackets.
Weather and science — NOAA-defined events like hurricane categories, temperature records.
Tech — AI model release dates, specific product announcements.
The breadth here is actually narrower than Polymarket’s in terms of exotic or niche markets, but the regulatory quality of the resolution criteria is higher. Every Kalshi market has a precise legal resolution definition tied to a specific public data source.
Will Kalshi Expand to the UK?
Possibly, in time. Kalshi has been vocal about international expansion, and the UK’s regulatory environment — while not currently set up for prediction market exchanges — has been evolving faster than most people expected post-Brexit.
The FCA doesn’t currently have a specific framework for event contracts. But the FCA’s broader approach to financial innovation (sandbox programmes, sandbox extensions for crypto) suggests that a licensed prediction market exchange could theoretically operate in the UK under a bespoke authorisation.
Manifold Markets and Metaculus serve as free-to-play calibration tools in the UK. A licensed, fiat-based prediction exchange would be a different product entirely — and if Kalshi (or a competitor) launched a UK-compliant version, it would likely require FCA authorisation under MiFID-style rules for financial instruments.
Our read: UK-accessible regulated prediction markets are probably 2–4 years away. Until then, Polymarket remains the main game.
For security while you’re actively trading, a Ledger hardware wallet keeps your USDC holdings off the internet between trades .
Using Kalshi Signals Even If You Can’t Trade It
One practical use for UK Polymarket traders: monitor Kalshi’s prices as part of your signal stack.
Several tools aggregate Kalshi and Polymarket side by side. The divergences are often meaningful. Kalshi’s orderbook tends to be tighter on regulatory/macro events because US institutional traders (with direct ACH access and no crypto friction) dominate those markets.
If Kalshi prices Fed rate cut probability at 72% and Polymarket sits at 60%, that 12-point gap is telling you something. Whether you fade it, follow it, or wait for convergence is a strategy call — but ignoring the signal is leaving information on the table.
Frequently Asked Questions
Is Kalshi legal in the UK? Kalshi itself is legal — it’s a CFTC-regulated US exchange. However, it explicitly restricts access to US residents. UK users cannot currently open funded trading accounts on Kalshi.
What’s the UK alternative to Kalshi? Polymarket is the main accessible prediction market for UK traders. It’s unregulated but large, liquid, and fully accessible. You’ll need USDC on Polygon to participate.
Are Kalshi and Polymarket prices the same? Not always. Price divergences between Kalshi and Polymarket on matching markets are common and can signal trading opportunities on Polymarket.
Does Kalshi use crypto? No. Kalshi uses USD via ACH bank transfer. No crypto wallet or USDC required. This is one of the key differences from Polymarket.
When will Kalshi be available in the UK? There’s no confirmed timeline. Regulatory approval in the UK would require an FCA framework for event contracts that doesn’t yet exist. Our estimate is 2028 at the earliest for a properly licensed UK-accessible version.