Key takeaway: Prediction market earnings face taxation across virtually all jurisdictions. How authorities classify these returns—whether as capital gains, gambling proceeds, or standard income—depends on your location and trading frequency. Maintain thorough documentation of all transactions without exception.
The uncomfortable reality many traders avoid: are prediction market returns subject to tax? The answer is straightforward: in nearly every case, yes. Below is a comprehensive regional analysis of how tax authorities globally handle prediction market earnings.
United States
The IRS has not released targeted rules for prediction markets, yet established tax doctrine remains applicable:
- Capital gains treatment: Should prediction market shares qualify as property (comparable to digital assets), gains face short-term capital gains taxation (standard income brackets, reaching 37%) when held fewer than twelve months
- Gambling income: When characterised as wagering, all returns count as standard income reported on Schedule 1, Line 8b. Offsetting losses against winnings is permitted (Schedule A), though losses cannot reduce other income categories
- Kalshi (regulated): Generates 1099 documentation for American participants. Polymarket does not—yet reporting remains a legal obligation
United Kingdom
HMRC typically categorises prediction market returns as betting proceeds, which remain untaxed for amateur participants. Nevertheless:
- Should trading constitute your primary occupation, HMRC may reclassify earnings as professional trading income (liable to income tax)
- USDC conversions and stablecoin transactions may generate separate capital gains liabilities
- Those engaged in systematic trading should obtain formal HMRC advice
European Union
Member nations apply divergent tax approaches to prediction market returns:
- Germany: Earnings taxed under private asset disposal rules or speculative gains frameworks (consult our German tax guide)
- France: Stablecoin-denominated gains subject to a uniform 30% levy (PFU), encompassing prediction market settlements in digital currency
- Netherlands: Portfolio-based wealth assessment (Box 3) supersedes transaction-level gains taxation
Australia
The ATO deems prediction market returns as taxable revenue. Frequent traders face treatment as standard income earners. Occasional participants might claim hobbyist status, though the ATO increasingly scrutinises blockchain-related ventures.
Record-keeping best practices
Across all jurisdictions, preserve documentation covering:
- Individual transactions: execution date, venue, position type (YES/NO), entry cost, volume
- Account movements including deposit/withdrawal dates, times, and sums
- Exchange rates for USDC and fiat conversions applicable to each transaction
- Receipts demonstrating platform charges
- Final market outcomes and settlement payouts
PolyGram's tax export feature produces IRS 8949-compliant documentation and EU MiCA-formatted datasets directly from your transaction ledger. Start trading on PolyGram →