Prediction Market Tax Reporting: Best Practices for June 2025

# Prediction Market Tax Reporting: Best Practices for June 2025 **Reporting prediction market profits correctly this June means treating most winnings as ordinary income, keeping detailed transaction records, and understanding whether your platform issued a 1099 form — because the IRS is paying closer attention to these markets than ever before.** Whether you traded on Polymarket, Kalshi, or another platform, your profits are taxable in the United States, and failing to report them can trigger audits, penalties, and interest charges. This guide breaks down exactly what you need to know before you file. --- ## Why Prediction Market Taxes Are Complicated Right Now Prediction markets exist in a regulatory gray zone, and that ambiguity spills directly into tax reporting. In 2023, the **Commodity Futures Trading Commission (CFTC)** officially recognized event contracts as legitimate financial instruments — a move that nudged platforms like Kalshi into the regulated mainstream. But the IRS hasn't issued specific guidance for prediction market income yet, which means traders are often left applying rules from adjacent categories: **gambling income**, **capital gains**, or **self-employment income**. The June tax deadline (June 16, 2025 for taxpayers who received an extension) is here, and the volume of prediction market trading has exploded. According to data from Polymarket alone, monthly trading volume crossed **$500 million** multiple times in 2024. That's a lot of taxable events the IRS is likely tracking — and you should be too. For a deeper look at how the platforms themselves differ in their legal standing, check out this [comparison of Polymarket vs Kalshi](/blog/polymarket-vs-kalshi-complete-guide-explained-simply) — the regulatory differences between them have direct tax implications. --- ## How the IRS Currently Classifies Prediction Market Profits Without explicit IRS guidance, tax professionals generally recommend one of three classifications depending on your activity: ### Casual Trader (Gambling Income) If you trade prediction markets occasionally and for recreation, the IRS is likely to treat your winnings like **gambling income**. This means: - Report gross winnings on **Schedule 1, Line 8b** - You can deduct losses only up to the amount of your winnings (not below zero) - Losses are itemized deductions — not useful if you take the standard deduction ### Active Trader (Capital Gains or Ordinary Income) If you trade frequently and systematically — especially if you're using tools like [automated political prediction market strategies](/blog/automating-political-prediction-markets-real-examples) — the IRS may classify you as a trader in securities or commodities. In this case: - Short-term gains (assets held under 1 year) are taxed as **ordinary income** (10%–37%) - Long-term gains (held over 1 year) qualify for the **0%, 15%, or 20%** capital gains rate - You may be eligible to file under **Section 475 mark-to-market** rules ### Crypto-Based Platforms (Crypto Tax Rules Apply) On platforms like Polymarket where you use **USDC or other stablecoins**, each trade may also trigger a crypto taxable event. Even if the stablecoin doesn't fluctuate in value, converting assets counts as a disposition. This creates two layers of taxable activity: the prediction market gain *and* the crypto transaction. --- ## Step-by-Step: How to Report Your Prediction Market Profits Here's a clear, numbered process to get your taxes right this June: 1. **Gather all transaction records.** Download your full trade history from every platform you used — Polymarket, Kalshi, Manifold, or any other market. Export CSV files where available. 2. **Separate your platforms by type.** Regulated platforms (like Kalshi) may issue **1099 forms**. Decentralized or offshore platforms likely won't — but you still owe taxes. 3. **Calculate gross winnings and losses.** For each market, identify your cost basis (amount wagered or paid for contracts) and your payout. The difference is your taxable gain or deductible loss. 4. **Determine your classification.** Were you a casual user or an active trader? Consult a tax professional if you're unsure — this decision affects which forms you file and how much you owe. 5. **Use crypto tax software if applicable.** Tools like Koinly, CoinTracker, or TaxBit can import blockchain transaction data and calculate gains automatically if you used a crypto-based platform. 6. **Complete the correct forms.** Casual gamblers use Schedule 1. Traders may use Schedule D and Form 8949. Mark-to-market traders use Form 4797. 7. **File or amend by your deadline.** If you received an extension, your federal deadline is **October 15, 2025** — but estimated taxes for Q2 are due **June 16, 2025**. 8. **Document your methodology.** Keep a written record of how you determined your classification and calculated your gains. This is your first line of defense in an audit. --- ## Key Tax Rates and Thresholds for 2025 Understanding the numbers helps you plan intelligently. Here's a quick reference table for the most relevant 2025 tax figures: | Income Type | Tax Rate | Key Threshold (Single Filer) | |---|---|---| | Ordinary income (short-term gains) | 10%–37% | $609,350+ = 37% bracket | | Long-term capital gains | 0%, 15%, 20% | $47,025 or less = 0% | | Net Investment Income Tax (NIIT) | 3.8% | $200,000+ AGI | | Self-employment tax | 15.3% | First $168,600 of SE income | | Gambling income | Ordinary income rates | No special rate | | Crypto capital gains | Same as capital gains | Depends on holding period | If your prediction market income pushes you over certain thresholds, you may also owe the **3.8% Net Investment Income Tax** on top of your regular rate. High-volume traders should model this carefully. --- ## Common Mistakes Prediction Market Traders Make at Tax Time The complexity of this space creates predictable errors. Here are the most costly ones to avoid: ### Assuming Offshore Platforms Are Tax-Free This is the single biggest misconception. Whether you traded on a platform based in the British Virgin Islands or accessed a smart contract on Ethereum, **the IRS taxes worldwide income for US citizens and residents**. There is no "offshore exemption" for prediction market profits. ### Forgetting Loss Carryovers If you had a rough year in 2024 and didn't fully deduct your losses, those may carry forward. Many traders leave money on the table by failing to check prior-year returns for unused capital loss carryovers — especially relevant if you were active in political markets during the 2024 election cycle. If you were running [arbitrage strategies on Senate race predictions](/blog/senate-race-predictions-arbitrage-approaches-compared), for instance, some of those positions may have closed at a loss that you can apply against your 2025 gains. ### Treating Prediction Markets Like Sports Betting While the tax treatment is *similar*, it's not identical. Sports betting winnings over **$600 with odds of 300:1 or more** trigger mandatory W-2G issuance. Prediction markets don't follow the same withholding rules, but platforms may still issue 1099-MISC or 1099-K forms depending on your volume. ### Not Tracking USDC Cost Basis Even though 1 USDC is nearly always worth $1, there can be microscopic gains or losses. If you made thousands of trades, those tiny differences add up — and some platforms use slightly different stablecoin values at settlement. Always track your cost basis precisely. --- ## How Platforms Are Handling 1099 Reporting in 2025 The regulatory environment is tightening rapidly. Here's what major platforms are doing: **Kalshi** — As a CFTC-regulated exchange, Kalshi is required to provide **Form 1099-B** to US users with more than $600 in proceeds. This is the same form used for broker-reported securities transactions. **Polymarket** — Currently decentralized and based on smart contracts, Polymarket does not issue 1099 forms. However, all transactions are publicly visible on the Polygon blockchain — meaning the IRS can trace them. **PredictEngine** — If you're using [PredictEngine](/) as part of your trading toolkit, maintain your own records of all API calls, automated trades, and position outcomes. Automated strategies can generate hundreds of taxable events per month, which makes organized recordkeeping non-negotiable. For traders using [AI-powered momentum strategies](/blog/ai-powered-momentum-trading-in-prediction-markets-june-2025), the volume of trades may be especially high. Pair every automated system with an equally systematic record-keeping approach. --- ## State Tax Considerations You Shouldn't Overlook Federal taxes aren't the only concern. State tax treatment varies significantly: - **Nevada and Wyoming** have no state income tax, simplifying things considerably - **California** taxes gambling and trading income at rates up to **13.3%** — and does *not* allow gambling loss deductions - **New York** taxes gambling winnings as ordinary income at up to **10.9%** state + NYC surcharges - **Washington State** has no income tax but a capital gains tax of **7%** on gains over $250,000 Always verify your state's specific treatment of gambling versus investment income, as that distinction can mean a difference of thousands of dollars. --- ## Recordkeeping Tools and Best Practices Good recordkeeping isn't just about avoiding audits — it's about knowing your actual performance. Here's what every serious prediction market trader should maintain: - **Trade log spreadsheet**: Date, market name, entry price, exit price, profit/loss per trade - **Platform export files**: Downloaded CSV or JSON files from each exchange, saved monthly - **Crypto wallet exports**: Full transaction history from any wallet used for prediction market deposits/withdrawals - **Screenshots of positions**: Especially for markets with no paper trail beyond blockchain data - **Notes on strategy**: Documenting that you traded systematically (rather than casually) supports an active trader classification if challenged Tools like **TaxBit**, **Koinly**, and **Accointing** all support Polygon-based transaction imports, which covers most Polymarket activity. If you're curious about more advanced strategies that generate lots of transactions worth tracking, the [slippage analysis guide](/blog/slippage-in-prediction-markets-approaches-compared) is a good read — knowing your true cost basis includes understanding slippage on every position. --- ## Frequently Asked Questions ## Do I have to report prediction market winnings if the platform didn't send me a 1099? Yes, absolutely. **The absence of a 1099 form does not exempt you from reporting income.** The IRS requires you to report all taxable income regardless of whether you received a tax form — this is explicitly stated in IRS Publication 525. Unreported income discovered during an audit typically results in back taxes, a 20% accuracy-related penalty, and interest. ## Are prediction market losses tax deductible? Yes, but the rules depend on your classification. **Casual gamblers can deduct losses only up to the amount of their winnings**, and only if they itemize deductions. Active traders classified under capital gains rules can deduct losses more broadly, and losses that exceed gains in a given year can be carried forward up to $3,000 per year against ordinary income. ## How are Polymarket profits taxed specifically? Because Polymarket uses **USDC on the Polygon blockchain**, profits are generally treated as either gambling income or capital gains depending on your trading frequency and intent. Each trade is also a potential crypto taxable event. Since Polymarket doesn't issue 1099 forms, you must calculate your own gains using blockchain transaction data — crypto tax software like Koinly can help automate this. ## What happens if I didn't report prediction market income in prior years? You can file **amended returns (Form 1040-X)** for up to three years back. Voluntarily correcting past errors significantly reduces your risk of penalties compared to being caught in an audit. If the amounts are substantial, consulting a tax attorney or CPA who specializes in digital assets before filing amended returns is strongly recommended. ## Can I deduct trading tools and software as a business expense? If you qualify as a **trader in securities or commodities** for tax purposes — meaning you trade frequently and for profit, not just occasionally — you may be able to deduct platform fees, data subscriptions, and trading software as business expenses on **Schedule C**. Casual gamblers cannot take these deductions. This is one of the main financial benefits of qualifying as an active trader. ## Is there a minimum profit threshold before prediction market income is taxable? No. **The IRS requires reporting of all income, including amounts under $600.** The $600 threshold you may have heard of only relates to when *platforms* are required to issue 1099 forms — it doesn't create a personal exemption. Even if you made $50 on a prediction market, that amount is technically reportable as income. --- ## Get Ahead of the IRS Before Your Deadline Prediction market trading is one of the most exciting — and most misunderstood — areas of modern finance from a tax perspective. The lack of IRS-specific guidance means you need to be proactive, document everything, and apply the closest analogous rules with confidence. The June 2025 quarterly estimated tax deadline and the October 2025 extension deadline are both approaching. Don't wait until the last minute to sort through months of trading activity. [PredictEngine](/) gives traders the data tools, automation capabilities, and market intelligence to trade prediction markets at a higher level — and with better records. Whether you're analyzing [Supreme Court ruling markets](/blog/advanced-supreme-court-ruling-markets-strategy-for-new-traders) or building systematic trading strategies, every position you take through our platform is logged and traceable. Start building smarter trading habits today — ones that make tax season far less painful. Visit [PredictEngine](/) to explore our tools and start trading with confidence. --- *This article is for informational purposes only and does not constitute tax advice. Consult a qualified tax professional or CPA for guidance specific to your situation.*