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Prediction Market Taxes: Complete 2026 Guide
Updated March 2026 — How to report Polymarket and Kalshi profits on your taxes. IRS forms, capital gains vs gambling income, USDC implications, and new 2026 law changes.
Disclaimer
This guide is for informational purposes only and does not constitute tax advice. Tax laws are complex and vary by jurisdiction. Consult a qualified tax professional for advice specific to your situation.
1. Are Prediction Market Profits Taxable?
Yes. Profits from prediction markets are taxable income in the United States. This applies whether you trade on Polymarket, Kalshi, or any other platform.
The IRS has not issued formal guidance specifically addressing prediction market contracts. However, all income is taxable unless specifically exempt, and prediction market winnings fall squarely into taxable territory.
Key Facts
- No platform currently issues a comprehensive 1099-B for trading gains
- You are responsible for self-reporting all prediction market income
- The IRS has blockchain analytics capability and can identify unreported crypto income
- Unreported income can result in penalties, interest, and potential prosecution
2. Three Ways to Report: Capital Gains vs Gambling vs Section 1256
Because the IRS hasn't issued specific guidance, traders must choose a defensible tax treatment. Here are the three approaches, ranked by how most tax professionals view them:
Option A: Capital Gains (Most Recommended)
Treat each prediction market contract as a capital asset. Report gains and losses on Form 8949 and Schedule D.
- Most positions resolve within a year = short-term capital gains (taxed at your ordinary income rate, up to 37%)
- Losses fully offset gains, with up to $3,000 excess deductible against ordinary income
- This is the most widely recommended approach by CPAs specializing in prediction markets
Option B: Section 1256 Contracts (Most Tax-Favorable, Legally Uncertain)
Under IRC Section 1256, gains are split 60% long-term / 40% short-term regardless of holding period. Report on Form 6781.
- The 60/40 split means a lower effective tax rate (max ~26.8% vs 37%)
- Risk: The CFTC has argued in a February 2026 amicus brief that event contracts are "swaps" — which would disqualify them from Section 1256 under the Dodd-Frank swap exclusion
- This approach is legally uncertain and may be challenged by the IRS
Option C: Gambling Income (Least Favorable)
Report winnings as gambling income on Schedule 1. Losses deductible only if itemizing.
- New in 2026: The One Big Beautiful Bill Act caps gambling loss deductions at 90% of winnings
- This means even a break-even trader could owe tax on 10% of gross winnings
- This approach is the least favorable and generally not recommended
| Approach | Max Tax Rate | Loss Deduction | IRS Form | Risk Level |
|---|---|---|---|---|
| Capital Gains | 37% (short-term) | Full offset + $3K | 8949 + Sched D | Low |
| Section 1256 | ~26.8% (60/40) | Full offset + $3K | 6781 | Medium-High |
| Gambling | 37% | 90% cap (2026) | Schedule 1 | Low (but costly) |
3. Which IRS Forms to Use
For the recommended capital gains approach:
Report each resolved or sold contract individually:
• Date acquired (when you opened the position)
• Date disposed (when the contract resolved or you sold)
• Cost basis (what you paid for the shares)
• Proceeds (what you received — $1.00/share if won, $0 if lost, or sale price)
• Net gain or loss
Summarize totals from Form 8949:
• Part I: Short-term gains (held under 1 year — most prediction market positions)
• Part II: Long-term gains (held over 1 year — rare for prediction markets)
The market resolved Yes on March 1 — you received $200.
Form 8949 entry:
Date acquired: 01/15/2026
Date sold: 03/01/2026
Proceeds: $200.00
Cost basis: $80.00
Gain: $120.00 (short-term capital gain)
4. Do Platforms Send 1099 Forms?
| Platform | 1099-B (Trading) | 1099-INT | 1099-MISC | Notes |
|---|---|---|---|---|
| Polymarket (International) | No | No | No | No tax forms issued at all |
| Polymarket US | TBD | TBD | TBD | KYC required; 1099 issuance expected eventually |
| Kalshi | No | Yes | Yes (referrals) | No 1099-B for trading gains/losses |
Bottom line: You must self-report prediction market income regardless of whether you receive tax forms. Use your platform transaction history, third-party tools, or blockchain records to reconstruct your trades.
5. USDC and Crypto Tax Implications (Polymarket)
If you trade on Polymarket, there's an additional complexity: USDC is a cryptocurrency, and the IRS treats all crypto as property.
The Double Tax Layer
- USDC conversions: Converting USD to USDC (or vice versa) is technically a taxable event. In practice, because USDC is pegged 1:1 to USD, the gain or loss is typically $0 or negligible.
- Prediction market gains: The profit from a winning contract (receiving more USDC than you invested) is the main taxable event.
Practical Impact
For most Polymarket traders, the USDC layer adds reporting complexity but not additional tax. The 1:1 peg means USDC conversions rarely generate gains. Focus on accurately reporting your prediction market contract gains.
Kalshi traders don't have this issue — Kalshi operates entirely in USD.
Blockchain Visibility
Every Polymarket trade is recorded on the Polygon blockchain. The IRS uses blockchain analytics tools to identify unreported crypto income. Do not assume your Polymarket activity is invisible to the IRS.
6. Platform Tax Comparison
| Factor | Polymarket | Kalshi |
|---|---|---|
| Currency | USDC (crypto) | USD (fiat) |
| Crypto tax layer | Yes (USDC = property) | No |
| 1099 forms | None | 1099-INT, 1099-MISC only |
| FBAR/FATCA | Possibly (offshore crypto) | No (US exchange) |
| Record-keeping | On-chain + platform history | Platform history only |
| Trading fees | ~0% | 1-7% |
| Tax complexity | Higher (crypto + PM gains) | Lower (USD only) |
Tax takeaway: Kalshi is simpler for taxes (USD, no crypto layer), but Polymarket has lower trading fees. The extra tax complexity of Polymarket is manageable with good record-keeping.
7. Key 2026 Tax Law Changes
One Big Beautiful Bill Act (Signed July 2025)
- Gambling loss deduction cap: Starting in 2026, gambling losses can only offset up to 90% of gambling winnings (previously 100%)
- This means if you report prediction market gains as gambling income, even a break-even year could result in a tax bill
- Estimated to raise $1.1 billion over 10 years
- Impact: Creates a strong incentive to use the capital gains treatment instead of gambling treatment
CFTC Approval of Polymarket US (November 2025)
- Polymarket received CFTC designation, enabling legal US operations with full KYC
- May eventually lead to formal 1099 reporting obligations
- Strengthens the argument that prediction market contracts are regulated derivatives, not gambling
Ongoing Litigation (April 2026)
- The 9th Circuit will hear oral arguments on April 16, 2026 in NADEX v. Nevada
- CFTC has argued event contracts are "swaps" — if upheld, this could disqualify Section 1256 treatment
- The outcome will significantly impact how prediction markets are classified for tax purposes
8. Tips for Reducing Your Tax Bill
- Use the capital gains approach — it's the most widely recommended and allows full loss deduction (vs the 90% cap under gambling treatment)
- Harvest losses — if you have losing positions, sell them before year-end to offset gains
- Keep detailed records — track every trade with date, cost basis, and proceeds. Use platform export tools or third-party trackers
- Consider holding period — if you hold a position over 1 year, it qualifies as long-term capital gains (20% max rate vs 37%)
- Consult a specialist — CPAs who understand both crypto and prediction markets can save you significantly. Firms like Camuso CPA, Monaco CPA, and BRC CPA specialize in this area
- Don't ignore it — the IRS has blockchain analytics tools. Unreported crypto income is increasingly detectable
Frequently Asked Questions
Do I owe taxes if I lost money on Polymarket?
If you report as capital gains, losses can offset other capital gains and up to $3,000 of ordinary income per year. Excess losses carry forward to future years. You still need to report the losses on your return — don't skip filing just because you lost money.
What if I'm not a US resident?
Non-US residents generally don't owe US taxes on prediction market gains from Polymarket International. However, you're subject to your home country's tax laws. In many European countries, gambling winnings are tax-free. Check with a local tax professional for your jurisdiction.
Can the IRS track my Polymarket activity?
Yes. Every Polymarket transaction is recorded on the Polygon blockchain, which is public. The IRS uses blockchain analytics companies like Chainalysis to identify unreported crypto income. Polymarket US also requires KYC (government ID and SSN), making identification straightforward.
Do I need to file FBAR or FATCA for Polymarket?
Possibly. If your Polymarket balance (as a foreign financial account) exceeds $10,000 at any point during the year, you may need to file FinCEN Form 114 (FBAR). FATCA Form 8938 applies at higher thresholds ($50,000+). This is an evolving area — consult a tax professional if you hold significant balances on Polymarket International.
What tools can help me track prediction market taxes?
Several tools have emerged: PolyTax, PolyTrack, and predictiontaxes.com can aggregate your Polymarket transaction history. For Kalshi, you can export trade history from your account settings. General crypto tax tools like Koinly and CoinTracker may also support Polygon transactions.
Should I report prediction markets as capital gains or gambling?
Most tax professionals recommend the capital gains approach (Form 8949 / Schedule D). It allows full loss deductions, avoids the 2026 gambling loss cap (90%), and treats prediction markets more like the regulated financial derivatives they're classified as by the CFTC. The gambling approach is generally less favorable.
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