Polymarket Legal UK: What UK Traders Need to Know

Polymarket in the UK — legal status explained

Polymarket’s legal classification for UK users doesn’t fit neatly into one box. It isn’t a traditional bookmaker under the Gambling Act; it’s an on-chain prediction-market infrastructure. That affects licensing, taxation, and KYC requirements differently from a betting exchange.

KYC and identity verification

Polymarket requires verification above certain deposit and withdrawal thresholds. The exact policy depends on your region and the current regulatory guidance. PolyGram inherits the same KYC requirements Polymarket imposes directly — there is no workaround. Verification typically includes government ID, proof of address, and in some cases a live selfie.

UK tax treatment

HMRC treats prediction-market gains on a case-by-case basis. Common classifications are capital gains (for investment-style activity) or miscellaneous income (for more frequent, trading-style activity). The threshold isn’t a bright line — it depends on frequency, organisation, and sophistication of your trading. Document cleanly and consult an accountant for material volumes.

Geo-restrictions

Certain markets aren’t accessible in specific jurisdictions. Polymarket implements geo-restrictions at the contract level. PolyGram respects those restrictions — there is no interface-level workaround.

Regulatory trajectory

UK regulatory treatment of prediction markets is actively evolving. The FCA, Gambling Commission, and HM Treasury have each commented on the space in recent years. Expect further clarification as the industry matures. None of this is legal advice.