Taxation of prediction market winnings differs substantially across jurisdictions and hinges on elements such as trading volume, whether forecasting constitutes your main profession, and how your tax authority views USDC-denominated activity. This overview covers the principal considerations — always engage a qualified tax adviser in your region for personalised counsel.
United States
- Most prediction market platforms restrict access for US-based participants (Polymarket implements geographic restrictions) — though blockchain-based trading remains technically available
- The IRS classifies cryptocurrency holdings as tangible property; every USDC transaction may trigger a taxable recognition event
- Earnings from prediction markets are probably subject to short-term capital gains taxation (taxed at ordinary income rates when positions close within 12 months)
- Kalshi (authorised by the CFTC) generates 1099 forms; decentralised platforms do not — participants must declare gains independently
- Active forecasters may qualify for trader status under tax code (enabling mark-to-market election)
United Kingdom
- Potential gambling exemption: returns may escape taxation if the activity qualifies as gambling under UK law
- Investment classification triggers capital gains tax: £3,000 exemption threshold applies in 2026
- Trading conducted as a profession counts as income — National Insurance contributions may be due
- HMRC has not released binding guidance on how prediction markets should be categorised
Germany
- §23 EStG: gains from private transactions under €600 annually remain untaxed
- Holding USDC beyond one year: returns may be exempt under German cryptocurrency tax law
- Regular trading activity probably qualifies as taxable income
- Glücksspielgewinne (gambling payouts) typically carry no tax liability — though application to prediction markets remains ambiguous
Australia
- The ATO classifies cryptocurrency as property: capital gains tax applies upon realisation
- Assets retained for 12+ months qualify for a 50% CGT discount
- Gambling returns are ordinarily non-taxable provided you are not a professional gambler
Best Practices Globally
- Export your full transaction ledger from PolyGram to support tax calculations
- Employ specialist crypto accounting platforms (Koinly, CoinTracking) to determine net gains and losses
- Maintain comprehensive documentation of every USDC transaction, covering deposits and withdrawals
- Retain a crypto-knowledgeable tax specialist familiar with your local rules
FAQ
- Does PolyGram report my earnings to tax authorities?
- PolyGram presently does not furnish tax documentation to account holders. You bear sole responsibility for declaring prediction market returns according to your local tax code.
- Is USDC treated differently from volatile crypto for tax?
- Across most jurisdictions, USDC remains classified as a cryptocurrency and faces equivalent tax rules as Bitcoin or Ethereum. Its price stability makes gain tracking easier but does not alter the underlying tax framework.
- What records should I keep?
- Retain all transaction receipts showing date, quantity, entry and exit prices, and settlement details. PolyGram offers downloadable transaction reports — save these on a regular basis.