The tax implications of prediction market winnings differ substantially across jurisdictions and hinge on elements such as trading volume, whether trading constitutes your primary occupation, and how your tax authority categorises USDC-denominated transactions. This overview covers the principal considerations — you should always seek advice from a qualified tax adviser in your region before making decisions.
United States
- Most prediction market platforms restrict access for US residents (Polymarket applies geographical restrictions) — though on-chain participation remains technically possible
- The IRS classifies digital assets as property; each USDC transaction may trigger a taxable event
- Earnings from prediction markets are typically taxed as short-term capital gains (at ordinary income rates if held under 1 year)
- Kalshi (operating under CFTC oversight) issues 1099 forms; decentralised platforms do not — you must report your own income
- Active traders may be eligible for trader tax status (permitting mark-to-market treatment)
United Kingdom
- A gambling exemption may apply: returns could be exempt from tax if your activity qualifies as gambling
- Investment classification triggers capital gains tax: the £3,000 annual exemption applies in 2026
- Income-generating trading activity is taxed as income — National Insurance contributions may be due
- HMRC has not issued clear rulings on how prediction markets should be classified
Germany
- §23 EStG permits tax-free treatment of private asset gains below €600 annually
- Holding USDC for more than 1 year: gains may be exempt under German cryptocurrency tax law
- Regular trading activity is likely classified as taxable income
- Glücksspielgewinne (gaming profits) are ordinarily not taxable — but the classification for prediction markets remains uncertain
Australia
- The ATO classifies digital assets as property: capital gains tax applies upon sale
- A 50% discount on capital gains tax is available for holdings exceeding 12 months
- Gambling returns are ordinarily not taxable unless you operate as a professional gambler
Best Practices Globally
- Export your full transaction log from PolyGram for use in your tax filing
- Employ dedicated crypto accounting tools (Koinly, CoinTracking) to determine your gains and losses
- Maintain comprehensive documentation of every USDC transaction, including deposits and withdrawals
- Engage a tax specialist with experience in digital asset transactions in your country
FAQ
- Does PolyGram submit my results to the tax authorities?
- PolyGram does not presently furnish tax documentation to participants. You bear sole responsibility for declaring your prediction market returns according to your local tax rules.
- Is USDC subject to different tax rules than other cryptocurrencies?
- Most jurisdictions treat USDC as a cryptocurrency asset governed by identical rules as Bitcoin or Ethereum. Its price stability streamlines gain computation but does not alter the underlying tax framework.
- What documentation is necessary for tax purposes?
- Retain all transaction receipts showing the date, quantity, entry price, exit price, and result. PolyGram allows you to download your transaction history — save copies on a regular schedule.