In this guide
Bottom line: Polymarket remains technically available to UK residents but exists within an uncertain regulatory framework. Access is possible through cryptocurrency wallets without IP restrictions. Taxation of returns follows either Income Tax (20–45%) or Capital Gains Tax (18–24%) depending on trading classification. PolyGram delivers a UK-tailored experience connected to the same Polymarket liquidity pool.
Within the UK prediction market landscape, Polymarket occupies a distinctive regulatory space. The UK Gambling Commission (UKGC) has neither formally authorised nor explicitly prohibited Polymarket operations. Because it functions through decentralised crypto wallets and blockchain-based contracts rather than conventional GBP accounts, it circumvents the regulatory structures that apply to established platforms such as Betfair and Smarkets.
Is Polymarket Legal in the UK?
Polymarket lacks UKGC authorisation. Nevertheless, it remains unambiguously legal for UK residents. The principal regulatory considerations include:
- Absence of IP-based restrictions for UK users — contrasting with US-based traders who encounter blocking
- Cryptocurrency-only funding — Polymarket accepts solely USDC on Polygon, a digital asset rather than a payment method covered by the Gambling Act 2005
- FCA framework: Digital assets fall under the Financial Services and Markets Act 2023, though prediction market instruments receive no specific regulatory treatment
- UKGC guidance: As of May 2026, no formal pronouncement has been issued regarding Polymarket specifically
Empirically: Since Polymarket's 2020 inception, UK-based participants have maintained uninterrupted platform access, with no recorded regulatory enforcement targeting individual UK traders.
Depositing into Polymarket from the UK
Practical funding pathways accessible to UK customers via PolyGram:
- Kraken UK: Bank transfer via BACS or Faster Payments → purchase USDC → transfer to Polygon wallet (approximately 10 minutes)
- Coinbase UK: Bank transfer or debit card payment → acquire USDC → move to Polygon
- PolyGram direct: Visa or Mastercard debit payment → USDC credited instantly to your PolyGram wallet
UK Tax Treatment of Polymarket Winnings
HMRC's approach to cryptocurrency-based prediction market returns operates as follows:
- If activity is sporadic (non-professional): Returns may qualify as gambling winnings — exempt from tax under prevailing HMRC interpretation for betting and gambling income
- If activity is frequent/structured: HMRC may reclassify as commercial trading — liable to Income Tax (20–45%)
- Alternatively, if categorised as digital asset investment: Capital Gains Tax (18–24%) applies to USDC sales exceeding the annual exemption threshold (£3,000 in 2026)
Definitional uncertainty persists around tax classification. Numerous UK Polymarket participants report returns utilising cryptocurrency CGT methodology and employ platforms such as Koinly or CoinTracker to produce HMRC-acceptable documentation.
UK-Relevant Markets on Polymarket
- UK General Election: Following the 2024 election cycle, the subsequent general election is scheduled for 2029. Active markets cover by-election outcomes, polling data, and internal party contests
- Premier League: Championship winner, bottom-three finishers and European qualification markets throughout the campaign
- Champions League: Arsenal, Chelsea, Manchester City — all featuring established CL trading activity
- World Cup 2026: England tournament victory market trading between 13–15%
- Bank of England: Base rate decision markets corresponding to each Monetary Policy Committee announcement
Polymarket vs UK Alternatives
| Platform | UK Access | Regulated | House Edge | Markets |
|---|---|---|---|---|
| Polymarket (via PolyGram) | ✅ Full | Grey zone | ~1% | 8,400+ |
| Betfair Exchange | ✅ Full | UKGC | 5% | ~500 |
| Smarkets | ✅ Full | UKGC | 2% | ~200 |
| Kalshi | ❌ US only | CFTC (US) | ~1% | ~500 |
| Metaculus | ✅ Full | None | N/A (no money) | 5,000+ |
Access UK prediction markets via PolyGram →
FAQ — Polymarket UK
- Do I need to declare Polymarket winnings to HMRC?
- HMRC mandates disclosure of all income subject to tax. Polymarket return taxation hinges upon trading intensity and HMRC's ultimate classification determination. Occasional participants may qualify for gambling income exemptions; active traders typically face Income Tax or CGT obligations. Seek personalised guidance from a qualified UK tax professional regarding your circumstances.
- Can I withdraw to a UK bank account?
- Direct bank withdrawal is unavailable. USDC conversion to GBP occurs on a UK-authorised exchange (Kraken, Coinbase) followed by standard bank transfer to your account. Processing typically requires 1–3 business days via Faster Payments infrastructure.
- Is Polymarket safer than Betfair?
- Betfair operates under UKGC licensing and incorporates FSCS safeguards. Polymarket functions as a decentralised protocol: assets reside within smart contracts rather than centralised custody — eliminating single-point-of-failure risk, yet providing neither FSCS nor UKGC recourse mechanisms in dispute scenarios.