Key takeaway: Prediction market earnings face taxation across virtually all jurisdictions. The precise categorisation—whether treated as capital gains, wagering proceeds, or standard income—depends on your location and trading frequency. Comprehensive documentation of all transactions is essential.
The uncomfortable reality many traders avoid: are prediction market returns subject to tax? The straightforward response: almost certainly. Below is a comprehensive overview of how tax authorities in different regions classify and tax prediction market earnings.
United States
The IRS has not released tailored rules for prediction markets, yet established tax doctrine still applies:
- Capital gains treatment: Should prediction market shares qualify as property (comparable to digital assets), gains face short-term capital gains taxation (standard income tax brackets, reaching 37%) when positions close within twelve months
- Wagering income: When characterised as wagering activity, all proceeds count as taxable ordinary income reported on Schedule 1, Line 8b. Offsetting losses against winnings is permitted (Schedule A), though deductions cannot reduce other taxable income
- Kalshi (regulated): Generates 1099 documentation for American participants. Polymarket provides no such forms — yet you remain obligated to self-report all earnings
United Kingdom
HMRC typically characterises prediction market returns as betting proceeds, which carry no tax burden for amateur participants. Nevertheless:
- Should trading constitute your primary occupation, HMRC may reclassify proceeds as trading income (subject to standard income taxation)
- Stablecoin transactions (USDC conversions) may constitute separate taxable events on capital account
- Those engaged in full-time trading should obtain formal HMRC clarification
European Union
Member states apply divergent tax frameworks:
- Germany: Returns taxed under private asset disposal rules or speculative trading provisions (consult our German tax guide)
- France: Stablecoin-settled returns subject to a uniform 30% levy (PFU) encompassing prediction market gains denominated in digital currency
- Netherlands: Annual wealth assessment on aggregate holdings (Box 3) supersedes transaction-level gain realisation
Australia
The ATO deems prediction market returns as income subject to assessment. Frequent traders face classification as ordinary income earners. Infrequent participants might assert non-commercial status, though the ATO has grown stricter regarding blockchain-related ventures.
Record-keeping best practices
Across all jurisdictions, preserve documentation covering:
- All transactions: execution date, contract identifier, position type (YES/NO), entry and exit prices, contract volume
- Account movements including deposit and withdrawal dates, corresponding values
- Conversion rates between stablecoins and fiat currency at each transaction moment
- Exchange service charge documentation
- Contract settlement information and received distributions
PolyGram's tax export functionality produces IRS 8949-ready documentation and EU MiCA-compliant data exports directly from your transaction ledger. Start trading on PolyGram →