Crypto Prediction Market Tax Guide 2026: Polymarket, Kalshi, and Blockchain Betting Tax Treatment

Quick Answer

Crypto prediction market winnings are taxed as gambling income (not capital gains) by the IRS, regardless of whether you use Polymarket, Kalshi, Azuro, or any other platform. Winnings are taxed as ordinary income at your marginal tax rate, and losses can only be deducted up to the amount of your gambling winnings if you itemize deductions. The 2026 tax year introduces new 1099-DA reporting requirements for certain prediction market platforms, making accurate record-keeping more critical than ever.

Key Takeaways

• Prediction market winnings are gambling income, not capital gains — This applies to Polymarket, Kalshi, Azuro, Overtime Markets, and all blockchain prediction platforms.
• Losses are deductible only against gambling winnings — You must itemize deductions (Schedule A) to claim losses, and only up to the amount of your total winnings.
• Polymarket USDC positions are taxable when resolved — Each resolved bet triggers a taxable event; trading positions before resolution triggers a capital loss or gain on the position itself.
• Kalshi issues W-2G forms for winnings over $600, while DeFi prediction markets do not issue any tax forms — but you still owe taxes.
• 2026 brings 1099-DA reporting for centralized crypto platforms, and some prediction market facilitators may begin issuing reporting documents.
• Session-level tracking is essential — Netting wins and losses across a single session is permitted for casual gamblers, but the rules differ for professional bettors.
• Korean taxpayers face 20% separate taxation on prediction market gains with a 2.5M KRW exemption, but these gains may also be classified as prize income depending on structure.

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What Are Crypto Prediction Markets?

Crypto prediction markets are blockchain-based platforms where users bet on the outcome of real-world events — elections, sports, economic indicators, crypto prices, and more. These platforms use cryptocurrency (typically USDC or USDT) as the wagering medium and smart contracts to automate payout resolution.

The major prediction market platforms in 2026 include:

• Polymarket: The largest decentralized prediction market built on Polygon, processing billions in trading volume. Users buy “Yes” or “No” outcome shares that resolve to $1 if correct and $0 if wrong.
• Kalshi: A CFTC-regulated prediction market that operates with USD, offering event contracts on economic data, weather, elections, and cultural events.
• Azuro: A decentralized sports and event prediction protocol built on Ethereum and Polygon, using liquidity pools for odds setting.
• Overtime Markets: A sports-focused prediction market built on Optimism and Arbitrum, offering crypto-native sports betting.
• Manifold Markets: A play-money prediction market with optional real-money conversion, popular for forecasting research.

The explosive growth of prediction markets — particularly Polymarket surpassing $3 billion in cumulative volume by 2026 — has created an urgent need for tax clarity that most users don’t have.

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IRS Tax Classification of Prediction Market Earnings

Gambling Income vs. Capital Gains

The most critical classification question is whether prediction market gains are capital gains (15-20% preferential rates) or gambling income (taxed at ordinary income rates up to 37%).

The IRS has consistently held that wagering on uncertain outcomes constitutes gambling. IRS Publication 529 explicitly states that gambling winnings include “winnings from lotteries, raffles, horse races, and casinos,” and “the fair market value of prizes, such as cars, trips, and jewelry.” Prediction market contracts — which pay out based on the outcome of an uncertain event — fall squarely within this definition.

Key IRS guidance supporting this classification:

1. Revenue Ruling 58-355: Established that betting on sports events constitutes gambling income regardless of the bettor’s level of expertise or the systematic nature of their betting.
2. Commissioner v. Groetzinger (1987): The Supreme Court held that gambling is an activity engaged in for profit only if pursued with continuity and regularity. For casual prediction market users, winnings are gambling income reported on Schedule 1 (Form 1040), Line 8b as “Other Income.”
3. Section 165(d): Gambling losses are deductible only to the extent of gambling winnings, and only as an itemized deduction on Schedule A.

For professional prediction market traders who demonstrate regularity, continuity, and profit motive, there may be an argument for treatment as a trade or business under Section 162. This would allow deducting losses fully as business expenses on Schedule C. However, this is a high bar — the IRS frequently challenges gambling-as-a-business claims.

How Each Platform Type Is Taxed

Platform	Currency	Likely Tax Form	Income Classification
Polymarket	USDC (Polygon)	No form issued (DeFi)	Gambling income
Kalshi	USD	W-2G (if >$600)	Gambling income
Azuro	Various crypto	No form issued (DeFi)	Gambling income
Overtime Markets	USDC	No form issued (DeFi)	Gambling income
PredictIt	USD	W-2G / 1099-MISC	Gambling income

Resolution Events vs. Position Trading

Prediction markets create two distinct types of taxable events:

1. Resolution (Settlement): When a prediction market contract resolves, your position settles at either $1 (correct prediction) or $0 (wrong prediction). The difference between your purchase price and the settlement value is your gambling win or loss.

• Example: You buy 500 “Yes” shares on Polymarket for $0.60 each ($300 total). The prediction resolves as “Yes.” Each share pays $1, so you receive $500. Your gambling winnings are $200 ($500 - $300).

2. Position Trading: If you sell your prediction market position before resolution, the transaction is more nuanced. The IRS has not directly addressed this, but two reasonable interpretations exist:

• Gambling treatment: The sale is still part of the gambling activity. Gains are gambling winnings; losses are gambling losses subject to Section 165(d) limitations.
• Capital asset treatment: The position itself could be treated as a capital asset (similar to a derivative contract). Selling it before resolution would generate a capital gain or loss on Form 8949.

The safer approach for tax compliance is to treat all prediction market gains and losses as gambling, regardless of whether you hold to resolution or trade positions early. However, for traders who actively buy and sell positions on Polymarket’s order book without ever holding to resolution, there’s a reasonable argument that this activity resembles day trading of derivative contracts rather than gambling.

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How to Report Prediction Market Taxes

For Casual Bettors (Most Users)

If you use prediction markets recreationally or as a side activity:

1. Report winnings on Schedule 1, Line 8b (Other Income). Include all resolved winning bets at their gross payout value.
2. Deduct losses on Schedule A (Itemized Deductions), Line 16 (Other Itemized Deductions — Gambling). You can only deduct losses up to the amount of your reported winnings.
3. Keep a gambling log with date, platform, event description, amount wagered, and amount won/lost for each session.

Important: If you take the standard deduction (which most taxpayers do), you cannot deduct gambling losses. This means a bettor who wins $5,000 on Polymarket and loses $4,000 in other bets still owes tax on the full $5,000 if they take the standard deduction.

For Professional Traders

If you can demonstrate that prediction market trading is your trade or business (regularity, continuity, profit motive, business-like operations):

1. Report income and expenses on Schedule C. Winnings are gross receipts; losses and expenses are fully deductible business costs.
2. Pay self-employment tax (15.3%) on net business income.
3. Consider Section 475(f) mark-to-market election for traders, which allows treating gains and losses as ordinary income/loss with no capital loss limitations.

Warning: The IRS aggressively audits gambling-as-a-business claims. Maintain thorough records, demonstrate consistent effort, and ideally show a reasonable expectation of profit over time.

Reporting Workflow Example

Here’s a complete example for a Polymarket user in 2026:

• Starting balance: 10,000 USDC
• Winning bets: 15 bets resolved as wins, total payout $8,500 (cost basis: $4,200)
• Losing bets: 22 bets resolved as losses, total cost $5,800
• Net USDC balance: 10,000 - 4,200 + 8,500 - 5,800 = $8,500

Tax reporting:

• Gambling winnings (Schedule 1): $8,500 (total payouts from winning bets)
• Gambling losses (Schedule A, if itemizing): $5,800 (total cost of losing bets)
• Taxable gambling net income: $2,700 (if itemizing) or $8,500 (if taking standard deduction)

Critical mistake to avoid: Do NOT report only the net $2,700 as gambling income. The IRS requires gross winnings as income, with losses deducted separately on Schedule A.

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2026 Tax Law Changes Affecting Prediction Markets

Form 1099-DA Reporting

The most significant 2026 change is the phased implementation of Form 1099-DA for digital asset brokers. While DeFi protocols like Polymarket and Azuro are not currently classified as “brokers” required to issue 1099-DA, centralized platforms like Kalshi already issue W-2G forms.

However, proposed Treasury regulations could extend broker reporting requirements to certain DeFi “facilitators” starting in the 2026 tax year. If finalized:

• Platforms that facilitate order matching (like Polymarket’s order book) may need to issue 1099-DA to users exceeding certain thresholds
• Non-custodial protocols may not be subject to reporting requirements
• Users should monitor Treasury guidance throughout 2026 for updates

The STABLE Act and GENIUS Act

The GENIUS Act (Guiding and Establishing National Innovation for U.S. Stablecoins) and the STABLE Act were both enacted in 2025-2026, creating the first comprehensive regulatory framework for stablecoins. While these laws primarily address stablecoin issuance and reserves, they have indirect tax implications:

• Payment stablecoins (USDC, USDT, PYUSD) used in prediction markets maintain their existing tax treatment as property
• Stablecoin-to-stablecoin swaps for prediction market funding remain non-taxable if the coins are treated as identical property
• Read our STABLE Act tax guide for a deeper analysis of how stablecoin legislation impacts your crypto tax reporting

Proposed De Minimis Exemption

The Crypto De Minimis Tax Exemption Act proposed in Congress would create a $200 exemption for personal crypto transactions. While this wouldn’t directly exempt prediction market winnings (which are gambling income, not personal transactions), it could reduce the tax burden on the crypto-to-fiat conversion of your prediction market gains. See our de minimis exemption guide for details.

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Korean Tax Treatment of Prediction Market Gains

For Korean taxpayers and Korean-Americans participating in prediction markets, the Korean tax system has its own classification rules:

Korean Classification

Korea does not have specific guidance for crypto prediction markets. Based on general tax principles:

1. If classified as gambling (도박): Korea imposes a 10% tax on lottery and prize income exceeding 50 million KRW. However, online gambling is illegal in Korea, which complicates reporting.
2. If classified as prize income (기타소득): Korea’s 20% flat tax (plus 2% local surtax) applies with a 2.5M KRW annual exemption — the same treatment as general crypto gains.
3. If classified as business income (사업소득): Active prediction market traders may need to report under business income with progressive rates (6-45%).

The most practical approach for Korean taxpayers is to report prediction market gains as 기타소득 (miscellaneous income) at 20% (22% including local surtax), consistent with how Korean crypto exchanges report general crypto trading gains.

US-Korea Double Taxation

A Korean resident who uses US-based prediction markets like Kalshi may owe tax in both countries. The Korea-US tax treaty provides foreign tax credits to prevent double taxation, but prediction market-specific treatment under the treaty is unclear. Consult a tax professional with cross-border crypto expertise.

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Record-Keeping Best Practices for Prediction Markets

What to Track

For each prediction market session, record:

1. Date and time of each bet placed
2. Platform name (Polymarket, Kalshi, Azuro, etc.)
3. Event description (e.g., “2026 US Presidential Election — Republican Winner”)
4. Position type (Yes/No)
5. Shares purchased and price per share
6. Total USDC/USD cost
7. Resolution date and outcome
8. Payout received (if won)
9. USD value at time of resolution (critical for crypto-denominated platforms)

Tools for Tracking

• CoinTracker and Koinly: Crypto tax software that can import wallet transactions from Polygon (Polymarket) and other chains, though manual labeling of gambling transactions is required.
• DappRadar and DeBank: Portfolio tracking tools that can export DeFi prediction market activity for tax preparation.
• Custom spreadsheet: For most users, a simple spreadsheet with session-level tracking is sufficient and provides the documentation the IRS expects.

Wallet-Level Considerations

Polymarket transactions are visible on-chain via your Polygon wallet address. The IRS can request wallet records through exchanges that interface with your bank account. Ensure your on-chain activity matches your reported gambling income. Read our crypto tax record reconciliation guide for systematic matching strategies.

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Common Mistakes and Audit Risks

1. Treating Winnings as Capital Gains

The most common and costly mistake is reporting prediction market gains as capital gains (15-20%) instead of gambling income (up to 37%). The IRS has increased scrutiny of this misclassification, and penalties for underpayment can reach 20% of the underpaid amount plus interest.

2. Netting Wins and Losses Without Itemizing

Many bettors assume that if they net out to a loss overall, they owe nothing. This is wrong. You must report gross winnings as income and deduct losses separately on Schedule A — only if you itemize. If you take the standard deduction and lost money overall on prediction markets, you still owe tax on every individual winning bet.

3. Ignoring DeFi Prediction Markets

The absence of a tax form from Polymarket or Azuro does not mean the activity is tax-free. The IRS receives blockchain analytics data and has increasingly sophisticated tools for identifying unreported crypto income. See our IRS crypto audit triggers guide to understand what draws IRS attention.

4. Not Tracking USD Value on Resolution Date

When a prediction market resolves in your favor and pays out in USDC, the USD value at the moment of resolution determines your gambling income amount. USDC typically trades at $1.00, but small deviations ($0.9998 or $1.0002) can affect large payouts. Document the exact USD value.

5. Forgetting About Position Trading Before Resolution

If you buy Polymarket shares at $0.40 and sell them at $0.75 before the event resolves, you have a taxable event even though the bet didn’t resolve. Track these intermediate trades separately.

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Comparison With Traditional Gambling Tax Rules

Crypto prediction markets follow the same fundamental tax rules as traditional gambling, but with additional complexity:

Aspect	Traditional Gambling	Crypto Prediction Markets
Income classification	Gambling income	Gambling income
Form received	W-2G (casinos, lotteries)	W-2G (Kalshi); none (Polymarket)
Loss deduction	Schedule A, up to winnings	Schedule A, up to winnings
Session netting	Allowed for casual gamblers	Same rule applies
Currency tracking	USD only	USD + crypto fair market value
Record-keeping	Casino win/loss statements	On-chain + off-chain records
State taxation	Varies by state	Same state rules apply

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State-by-State Considerations

State-level gambling tax rules vary significantly and affect how prediction market gains are taxed at the state level:

• States with no income tax (Texas, Florida, Washington, Nevada, etc.): No state tax on prediction market winnings.
• States that don’t allow gambling loss deductions (Connecticut, Massachusetts, others): You owe state tax on gross winnings with no deduction for losses.
• States with special gambling tax rates: Some states apply different rates to gambling income.

Read our comprehensive crypto taxes by state guide for state-specific rules.

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Deducting Prediction Market Losses

The Section 165(d) Limitation

Under IRS Section 165(d), gambling losses are deductible only to the extent of gambling winnings during the same tax year. This means:

• If you win $10,000 and lose $12,000, you can only deduct $10,000 in losses.
• The excess $2,000 in losses cannot be carried forward to future years.
• Losses are reported on Schedule A (Itemized Deductions), not against ordinary income.

What Counts as a Loss

For prediction markets, a gambling loss occurs when:

1. A position resolves against you (settles at $0)
2. You sell a position for less than you paid (if treating as gambling)

Expenses directly related to prediction market activity — such as gas fees for placing bets on Polygon, transaction fees on the platform, and blockchain network fees — may or may not be deductible:

• As a casual bettor: These fees are effectively part of your bet cost and reduce your net win or increase your net loss.
• As a professional trader: These fees are fully deductible business expenses on Schedule C.

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Frequently Asked Questions

Q1: Do I need to pay taxes on Polymarket winnings if I didn’t withdraw the funds?

Yes. Tax liability is triggered when the prediction market contract resolves in your favor, not when you withdraw funds to your bank account. The moment your position settles and your wallet receives the payout, you have taxable gambling income.

Q2: How are Polymarket USDC payouts taxed if USDC is a stablecoin?

Even though USDC is designed to maintain a 1:1 peg with the US dollar, the IRS treats cryptocurrency as property. Your gambling income is the USD value of the USDC at the time you receive it. Since USDC trades at approximately $1.00, the practical impact is minimal, but you should document the exact value. When you later convert USDC to USD or another crypto, that conversion may trigger an additional small capital gain or loss based on USDC price movements.

Q3: Can I deduct prediction market losses if I take the standard deduction?

No. Gambling losses are only deductible as an itemized deduction on Schedule A. If you take the standard deduction, you cannot deduct any gambling losses, even though you must still report all gambling winnings as income. This is one of the harshest aspects of gambling taxation.

Q4: Is there a de minimis threshold for prediction market tax reporting?

There is no de minimis threshold for reporting gambling income. Technically, even a $1 winning bet should be reported. However, platforms like Kalshi only issue W-2G forms for winnings of $600 or more (or $300+ if the payout is at least 300x the wager). The absence of a W-2G does not eliminate your reporting obligation.

Q5: Are prediction market positions on Polymarket considered securities or commodities?

No. Polymarket positions are event contracts (binary outcome shares), not securities or commodities. The CFTC has taken enforcement actions against some prediction market platforms for operating without proper registration. Kalshi operates as a CFTC-regulated exchange. The tax treatment (gambling income) applies regardless of the regulatory classification.

Q6: What happens if I lose money overall on prediction markets for the year?

You can deduct losses up to the amount of your total winnings (if you itemize). If your losses exceed your winnings, the excess is not deductible and cannot be carried forward. For example, if you won $3,000 total on winning bets but lost $5,000 total on losing bets, you report $3,000 as gambling income and deduct $3,000 as gambling losses on Schedule A. The remaining $2,000 loss provides no tax benefit.

Q7: How does the 2026 1099-DA reporting affect Polymarket users?

Polymarket is a decentralized protocol on Polygon and does not currently issue tax forms. The 2026 1099-DA reporting requirements apply to “digital asset brokers” — and it remains unclear whether DeFi prediction markets qualify as brokers under proposed Treasury regulations. Even if Polymarket never issues a 1099-DA, you are still legally required to report all gambling winnings. The IRS can reconstruct your activity through blockchain analytics and exchange records.

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Tax Planning Strategies for Prediction Market Bettors

1. Track Every Session

A “session” of gambling is treated as a single unit for netting purposes. If you place multiple prediction market bets in a single sitting, you may be able to net the wins and losses within that session before reporting. The IRS has not defined “session” for crypto prediction markets, but a reasonable approach is to treat a continuous period of betting activity on a single platform as one session.

2. Bunch Deductions for Itemizing

If your prediction market losses plus other itemizable deductions are close to the standard deduction amount, consider “bunching” two years of deductions into one year to exceed the standard deduction threshold. This allows you to deduct gambling losses in alternate years.

3. Offset With Tax Loss Harvesting

If you have crypto losses elsewhere in your portfolio, tax loss harvesting those losses can offset capital gains and up to $3,000 of ordinary income. While this doesn’t directly reduce gambling income, it can lower your overall tax burden.

4. Consider Quarterly Estimated Taxes

If you generate significant prediction market income, you may need to pay quarterly estimated taxes to avoid underpayment penalties. Gambling income is not subject to withholding (unless a W-2G is issued), so plan ahead.

5. Maintain a Separate Wallet for Prediction Markets

Using a dedicated wallet for prediction market activity simplifies record-keeping and creates a clean audit trail. This separation makes it easier to demonstrate your gambling activity versus investment activity.

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Related Guides

• Complete Crypto Tax Reporting Guide for 2026
• DeFi Tax Implications: How Decentralized Finance Transactions Are Taxed
• Crypto Taxes by State in 2026
• IRS Crypto Audit Triggers: What Draws IRS Attention
• Crypto Tax Loss Harvesting Strategies
• Crypto Quarterly Estimated Taxes 2026
• IRS Form 1099-DA Reporting Guide

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Stay Compliant With Prediction Market Taxes

Prediction markets are one of the fastest-growing sectors in crypto, but the tax rules are clear: your winnings are gambling income. Don’t wait until tax season to organize your records. Track every bet, save your wallet transaction history, and consider consulting a crypto tax professional if your prediction market activity is substantial.

Need help calculating your exact tax liability? Use our crypto tax tools to estimate your obligations and stay ahead of IRS reporting requirements. Bookmark this page and check back for updates as 2026 tax guidance evolves.

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