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The honest answer: **it's a grey area.** Polymarket isn't UKGC-licensed, technically restricts UK users, and you have no UK consumer protections. Here's everything you need to know before deciding.
The Short Answer
Polymarket does not hold a UK Gambling Commission licence. It blocks UK IP addresses in its terms. Using it via VPN is **not explicitly illegal under UK law** — there's no law targeting individual users of overseas sites — but you do so without UK consumer protections and Polymarket's terms prohibit it, meaning your account could be closed.
**Important:** Because Polymarket isn't UKGC-licensed, you have no recourse to UK dispute resolution. Your funds in USDC are not protected by the FSCS.
What UK Law Actually Says
The Gambling Act 2005 makes it illegal to *operate* unlicensed gambling to UK customers. It doesn't make it illegal for individuals to *use* overseas sites. So as a UK user, you're not breaking UK law — but you are violating Polymarket's own terms, losing UK regulatory protections, and accepting that your funds have no FSCS coverage.
The Regulated Alternative
Kalshi is CFTC-regulated in the United States — the only federally regulated prediction market in the world. It accepts international users who complete identity verification, uses USD bank transfers (no crypto needed), and operates under strict financial compliance rules. For UK users wanting regulated exposure, Kalshi is the clear choice.
Federally regulated prediction market. Available to international users.
Join Kalshi →Do I Pay UK Tax On Winnings?
HMRC's position is complex. Gambling winnings are generally tax-free in the UK, but Polymarket may be classified as financial trading depending on activity level. If you're trading regularly and profitably, seek professional tax advice — the HMRC position on prediction markets hasn't been definitively tested.
The Regulatory Outlook
The UK Gambling Commission is reviewing its framework in 2026. The key question — are prediction markets gambling or financial instruments? The CFTC in the US leaned toward financial instruments. If the UK follows, regulated prediction markets could be available to UK residents within 2–3 years.
FAQ
Has anyone in the UK been prosecuted for using Polymarket?
No — there are no known cases of UK individuals being prosecuted for using unlicensed overseas gambling sites for personal use. The law targets operators, not individual users.
Is Manifold Markets legal for UK users?
Yes, completely. Manifold uses play money with no real monetary value, making it entirely legal everywhere including the UK with no restrictions whatsoever.
*Sento earns a commission if you sign up through our links. This never affects our rankings. Prediction markets involve financial risk — never stake more than you can afford to lose. Updated March 2026.*
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Compare prediction market platforms — Polymarket, Kalshi & more.