In this guide
Bottom line: Polymarket remains technically available to UK residents but exists within an uncertain regulatory landscape. British users can access it through crypto wallets without country restrictions. Tax implications: earnings are probably subject to Income Tax (20–45%) or CGT (18–24%). PolyGram delivers a UK-tailored platform on the same Polymarket order book.
Polymarket's status as a UK prediction market platform presents a complex regulatory picture. The UKGC has neither formally approved nor prohibited Polymarket. Because it functions through blockchain-based smart contracts and crypto wallets rather than conventional GBP transfers, it circumvents the regulatory structure that applies to licensed betting operators such as Betfair and Smarkets.
Is Polymarket Legal in the UK?
Polymarket lacks UKGC authorisation. Nonetheless, it remains unambiguously unlawful for UK residents. The principal regulatory considerations are:
- Absence of IP restrictions for users in the UK — unlike American users who face blocking
- Cryptocurrency-only deposits — Polymarket accepts solely USDC on Polygon, a digital asset rather than a controlled payment instrument under the Gambling Act 2005
- FCA position: Digital assets fall under the Financial Services and Markets Act 2023, though prediction markets themselves remain unspecified
- UKGC guidance: No formal statement concerning Polymarket has been issued as of May 2026
Practically speaking: Since Polymarket's inception in 2020, UK-based participants have reported uninterrupted usage without any recorded regulatory enforcement against individual account holders.
Depositing into Polymarket from the UK
Accessible deposit pathways through PolyGram for UK customers:
- Kraken UK: BACS / Faster Payments → acquire USDC → transfer to Polygon address (~10 min)
- Coinbase UK: Bank transfer or debit card → USDC → transfer to Polygon
- PolyGram direct: Visa or Mastercard debit → USDC delivered instantly to your PolyGram account
UK Tax Treatment of Polymarket Winnings
HMRC's approach to crypto-based prediction market earnings operates as follows:
- If activity is infrequent (non-professional): Earnings might qualify as gambling returns — no tax liability under prevailing HMRC rules for spread betting and gambling proceeds
- If activity is frequent/professional: HMRC may treat it as a business — liable for Income Tax (20–45%)
- Alternatively, if classified as a crypto holding: Capital Gains Tax (18–24%) applies when converting USDC above the annual exemption threshold (£3,000 in 2026)
The tax position remains genuinely uncertain. Numerous UK Polymarket participants report their returns under crypto CGT frameworks and employ services such as Koinly or CoinTracker to produce HMRC-approved documentation.
UK-Relevant Markets on Polymarket
- UK General Election: Following the 2024 election, the subsequent GE is scheduled for 2029. Active markets cover by-elections, polling movements, and party leadership contests
- Premier League: Championship, relegation and European qualification markets throughout the campaign
- Champions League: Arsenal, Chelsea, Manchester City — all featuring liquid CL betting
- World Cup 2026: England tournament victory market trading at 13–15%
- Bank of England: Base rate markets for each MPC 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 taxable returns. Whether your Polymarket earnings are taxable hinges on your trading pattern and how HMRC categorises your activity. Occasional participants may qualify for the gambling exemption; those trading regularly will probably owe Income Tax or CGT. Seek professional tax guidance tailored to your circumstances.
- Can I withdraw to a UK bank account?
- Direct withdrawal is unavailable. USDC must first be exchanged for GBP via a UK-authorised crypto exchange (Kraken, Coinbase) before transferring to your bank. Processing typically requires 1–3 business days using standard Faster Payments.
- Is Polymarket safer than Betfair?
- Betfair operates under UKGC oversight with FSCS safeguards. Polymarket functions on-chain: your capital sits in smart contracts rather than a centralised operator — eliminating single points of failure but forfeiting FSCS or UKGC remedies in case of disputes.