Bottom line: Polymarket remains technically accessible to UK residents but occupies an uncertain regulatory space. British users can access the platform through crypto wallets without IP-based restrictions. Tax implications: profits are likely subject to Income Tax (20–45%) or CGT (18–24%) depending on trading classification. PolyGram delivers a UK-tailored experience on the identical Polymarket order book.
As a UK prediction market offering, Polymarket occupies a distinctive regulatory landscape. The UK Gambling Commission (UKGC) has neither formally authorised nor explicitly prohibited Polymarket. Because the platform functions through cryptocurrency wallets and decentralised smart contracts rather than conventional sterling accounts, it circumvents the regulatory structures applied to established betting exchanges such as Betfair and Smarkets.
Is Polymarket Legal in the UK?
Polymarket lacks UKGC authorisation. Nevertheless, it remains unbarred for British residents. The principal regulatory considerations are:
- Absence of geo-blocking for UK internet users — in contrast to American users who face access restrictions
- Cryptocurrency-only funding — Polymarket exclusively accepts USDC on Polygon, a digital asset rather than a regulated payment mechanism under the Gambling Act 2005
- FCA approach: Digital assets fall within the Financial Services and Markets Act 2023 remit, though prediction market instruments remain unspecified
- UKGC guidance: No formal statement regarding Polymarket has been issued as of May 2026
In reality: British users have maintained continuous platform access since Polymarket's 2020 inception, with no recorded regulatory action targeting individual UK traders.
Depositing into Polymarket from the UK
Accessible deposit pathways for British residents via PolyGram:
- Kraken UK: BACS or Faster Payments → acquire USDC → transfer to Polygon address (~10 minutes)
- Coinbase UK: Bank transfer or debit card → USDC purchase → Polygon network transfer
- PolyGram direct: Visa or Mastercard debit card → USDC credited instantly to your PolyGram account
UK Tax Treatment of Polymarket Winnings
HMRC's approach to crypto-based prediction market profits:
- Where trading is infrequent (non-professional): Profits may qualify as gambling returns — exempt from tax under prevailing HMRC rules for betting and gaming
- Where trading is frequent/professional: HMRC may designate this a trading activity — liable to Income Tax (20–45%)
- Alternatively, if classified as digital asset speculation: Capital Gains Tax (18–24%) applies to USDC conversions exceeding the yearly CGT exemption (£3,000 for 2026)
Tax classification remains genuinely uncertain. Numerous UK Polymarket traders report earnings via 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, the subsequent general election is scheduled for 2029. Active markets include by-elections, polling data, and party leadership contests
- Premier League: Championship, bottom-three, and top-four finisher markets throughout each campaign
- Champions League: Arsenal, Chelsea, Manchester City — each with substantial liquidity in European competition markets
- World Cup 2026: England tournament victory market trading between 13–15%
- Bank of England: Interest rate determination markets ahead of every 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 taxable profit. Polymarket earnings' taxability hinges on trading volume and HMRC's categorisation. Occasional traders may benefit from gambling profit exemptions; full-time traders typically incur Income Tax or CGT obligations. Seek guidance from a qualified UK accountant regarding your circumstances.
- Can I withdraw to a UK bank account?
- Direct withdrawal is unavailable. USDC requires conversion to sterling through a UK-authorised crypto platform (Kraken, Coinbase) prior to bank transfer. Standard Faster Payments processing typically requires 1–3 business days.
- Is Polymarket safer than Betfair?
- Betfair operates under UKGC supervision and incorporates FSCS safeguards. Polymarket functions as a blockchain system: assets reside in decentralised smart contracts rather than a centralised entity — eliminating single-point-of-failure risk, yet forfeiting FSCS or UKGC recourse mechanisms if complications materialise.