Disclosure: PredScope may receive compensation when you sign up for prediction market platforms through links on this site. This does not influence our ratings or reviews. Learn more.

Home › Guides › Prediction Market Taxes

Prediction Market Taxes: Complete 2026 Guide

Updated April 2026 — How to report Polymarket and Kalshi profits on your taxes. IRS forms, capital gains vs gambling income, USDC implications, new 2026 law changes, platform-specific breakdowns, worked examples, and a tax estimator.

Disclosure: This page contains affiliate links. PredScope may earn a commission if you sign up through our links, at no extra cost to you. This does not affect our ratings or analysis.

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.

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

3. Deep Dive: How Prediction Market Gains Are Taxed

The fundamental challenge with prediction market taxation is that the IRS has not issued definitive guidance on how to classify event contract gains. Unlike stocks, options, or futures, prediction market contracts exist in a regulatory gray area. This section examines the three possible tax treatments in detail, including the legal arguments for and against each approach.

Treatment 1: Capital Gains Under Section 1001

Under this treatment, each prediction market share is a "capital asset" as defined by IRC Section 1221. When you buy a Yes share at $0.40 and it resolves at $1.00, you have a $0.60 capital gain per share. The argument for this treatment:

• Legal basis: IRC Section 1221 defines a capital asset broadly as "property held by the taxpayer." Prediction market shares are property — you purchase them, hold them, and dispose of them at a gain or loss. The IRS has historically treated options contracts as capital assets (Rev. Rul. 78-182).
• CFTC classification supports this: The CFTC regulates Kalshi as a Designated Contract Market (DCM). Event contracts traded on a DCM are regulated derivatives, not gambling. This regulatory classification strengthens the capital asset argument.
• Holding period matters: If you hold a position for more than one year (rare, but possible with long-dated markets), the gain qualifies as long-term capital gain with a maximum rate of 20% (plus 3.8% NIIT for high earners).
• Net Investment Income Tax (NIIT): Under this approach, prediction market gains are "net investment income" subject to the 3.8% NIIT surtax if your modified AGI exceeds $200,000 (single) or $250,000 (married filing jointly).

Treatment 2: Section 1256 Contracts (60/40 Split)

IRC Section 1256 applies to "regulated futures contracts" traded on a qualified board or exchange. The key benefit is a 60% long-term / 40% short-term blended rate regardless of how long you held the position. For a taxpayer in the 37% bracket, the effective rate drops to approximately 26.8%.

• Legal argument for: Kalshi is a CFTC-designated contract market (DCM). Contracts on a DCM could be characterized as "regulated futures contracts" under Section 1256(g)(1), which defines them as contracts "with respect to which the amount required to be deposited... cannot be less than the amount established by the relevant exchange."
• Legal argument against: The Dodd-Frank Act added Section 1256(b)(2)(B), which explicitly excludes "swap contracts" from Section 1256 treatment. In its February 2026 amicus brief in NADEX v. Nevada, the CFTC characterized event contracts as "swaps" under the Commodity Exchange Act. If event contracts are swaps, they are excluded from Section 1256.
• Mark-to-market requirement: Section 1256 requires mark-to-market accounting at year-end. All open positions must be treated as if sold at fair market value on December 31, with unrealized gains or losses recognized. This means you may owe tax on positions that haven't resolved yet.
• Three-year carryback: Section 1256 allows net losses to be carried back three years (vs. capital losses which only carry forward). This can generate refunds from prior tax years.

Treatment 3: Gambling Income

Under this treatment, prediction market gains are reported as "Other Income" on Schedule 1, Line 8b, or as gambling winnings on Line 8b with gambling losses claimed as an itemized deduction on Schedule A.

• Legal argument for: The state of Nevada and several state attorneys general have argued that prediction markets are a form of gambling. Some courts have historically treated binary outcome contracts as wagers.
• Why it's unfavorable: Starting in 2026, the One Big Beautiful Bill Act (Section 13604) caps gambling loss deductions at 90% of gambling winnings. This means a trader who won $50,000 and lost $50,000 (net zero) would owe tax on $5,000 of phantom income.
• Professional gamblers (Schedule C): If you qualify as a professional gambler, you can report on Schedule C (self-employment income). This allows business expense deductions (software, research, internet) but triggers self-employment tax of 15.3% on net earnings up to the Social Security wage base ($168,600 in 2026).
• Casual gamblers: If treated as a casual gambler, you report winnings as Other Income and can only deduct losses if you itemize deductions on Schedule A. The standard deduction for 2026 is $15,000 (single) or $30,000 (married filing jointly), so many casual traders won't benefit from itemizing.

4. Which IRS Forms to Use

For the recommended capital gains approach:

5. Do Platforms Send 1099 Forms?

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.

6. Platform-Specific Tax Treatment

Each prediction market platform operates under different regulatory frameworks, which affects tax reporting. Here is a detailed breakdown of the tax implications for each major platform.

Kalshi Tax Treatment

Kalshi is a CFTC-regulated Designated Contract Market (DCM) and the most straightforward platform for US tax purposes.

• Regulatory status: Fully regulated by the CFTC as a DCM under the Commodity Exchange Act. This gives Kalshi contracts the strongest case for treatment as regulated financial instruments rather than gambling.
• Forms issued: Kalshi issues 1099-INT for interest earned on account balances (if above $10 threshold) and 1099-MISC for referral bonuses exceeding $600. Kalshi does not issue 1099-B for trading gains.
• Section 1256 argument: Because Kalshi is a DCM, its contracts have the strongest case for Section 1256 treatment (60/40 split). However, the CFTC's February 2026 amicus brief calling event contracts "swaps" complicates this. If the 9th Circuit agrees, Section 1256 may be unavailable.
• Mark-to-market: If using Section 1256, you must mark all open Kalshi positions to fair market value on December 31 and recognize unrealized gains/losses. Use Kalshi's year-end account statement to determine position values.
• Currency: All Kalshi transactions are in USD — no cryptocurrency tax complications.
• Record-keeping: Kalshi provides downloadable trade history in CSV format from your account dashboard under Settings > Tax Documents. This includes date, market, direction, price, quantity, and settlement.
• Fee deductibility: Kalshi charges trading fees (1-7% depending on contract). Under the capital gains approach, fees are added to your cost basis or subtracted from proceeds. Under gambling treatment, fees may be deductible as gambling expenses if you itemize.

Polymarket Tax Treatment

Polymarket operates as a crypto-native platform using USDC on the Polygon blockchain, adding significant complexity to tax reporting.

• Regulatory status: Polymarket International operates offshore with no KYC requirement. Polymarket US received CFTC approval in November 2025 and requires full KYC (government ID and SSN) for US users.
• Forms issued: Polymarket International issues no tax forms whatsoever. Polymarket US is expected to issue 1099 forms eventually but has not yet committed to a specific timeline or form type.
• USDC creates additional taxable events: Every deposit (USD to USDC), withdrawal (USDC to USD), and bridge transaction (Ethereum to Polygon, or vice versa) is technically a taxable event. While USDC is pegged to $1.00, brief depegging events (e.g., March 2023 when USDC traded at $0.87) can create real gains or losses on the stablecoin itself.
• On-chain records: All Polymarket trades are recorded on the Polygon blockchain. Your wallet address, trade history, and balances are publicly visible. You can use Polygonscan to verify your transaction history.
• FBAR/FATCA considerations: If you use Polymarket International (the offshore version), your account may qualify as a foreign financial account subject to FBAR (FinCEN Form 114, threshold $10,000) and FATCA (Form 8938, threshold $50,000 single / $100,000 MFJ for domestic filers).
• Self-reporting required: You must reconstruct your complete trade history using Polymarket's platform export, Polygonscan transaction records, or third-party tools like PolyTax.

Robinhood Event Contracts Tax Treatment

Robinhood launched event contracts in 2025, bringing prediction markets to a mainstream brokerage platform.

• Regulatory status: Robinhood operates event contracts under its existing SEC-registered broker-dealer framework and CFTC oversight. Contracts are treated as regulated financial instruments.
• Forms issued: Robinhood issues 1099-B (Proceeds from Broker and Barter Exchange Transactions) that includes event contract trades alongside stock and options trades. This is the most comprehensive 1099 reporting of any prediction market platform.
• Tax treatment: Because Robinhood reports on 1099-B, the IRS expects you to report these on Form 8949 and Schedule D as capital gains/losses. Robinhood's 1099-B includes cost basis, proceeds, and holding period for each event contract.
• Currency: All transactions in USD — no crypto complications.
• Advantages: Integrated with Robinhood's existing tax reporting. If you also trade stocks or options on Robinhood, all your capital gains/losses appear on a single 1099-B. Popular tax software (TurboTax, H&R Block) can import Robinhood 1099-B data directly.
• Limitations: Robinhood's event contract selection is more limited than Polymarket or Kalshi. Fees may differ from dedicated prediction market platforms.

PredictIt Tax Treatment (Historical)

PredictIt operated under a CFTC no-action letter from 2014 to 2023. While the platform ceased new market creation in 2023, some traders may still have unreported PredictIt income from prior tax years.

• Forms issued: PredictIt issued 1099-MISC (Miscellaneous Income) for traders with net profits exceeding $600 in a tax year. This reported gross profit, not individual trades.
• Tax treatment: PredictIt reported income in Box 3 of 1099-MISC (Other Income). This meant the IRS expected it as "other income" on Schedule 1, Line 8z. Traders could alternatively report on Schedule C if they qualified as professional traders.
• Loss deduction challenges: Because PredictIt reported on 1099-MISC rather than 1099-B, deducting losses was complicated. Traders who reported as capital gains needed to reconcile their Form 8949 with the 1099-MISC amount, which sometimes triggered IRS matching notices.
• 5% withdrawal fee: PredictIt charged a 5% fee on profits and a 5% fee on withdrawals. These fees were deductible as investment expenses (under capital gains treatment) or gambling expenses (under gambling treatment).

7. 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

1. 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.
2. Prediction market gains: The profit from a winning contract (receiving more USDC than you invested) is the main taxable event.

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.

8. Cryptocurrency Tax Complications

For traders using crypto-native platforms like Polymarket, the cryptocurrency layer introduces several additional tax considerations beyond the basic prediction market gain or loss.

USDC Deposit and Withdrawal Taxable Events

When you deposit into Polymarket, you typically convert USD to USDC via an exchange (Coinbase, Kraken) or on-ramp service (MoonPay, Transak). Each conversion step is technically a taxable disposition of property:

• USD → USDC purchase: You acquire USDC at a cost basis equal to the USD amount paid (plus any fees). If USDC is trading at exactly $1.00, your cost basis is $1.00 per USDC.
• USDC → USD withdrawal: When you convert USDC back to USD, you realize a gain or loss equal to the difference between your proceeds (USD received) and your cost basis (what you paid for the USDC). Usually this is $0, but during depegging events it can be material.
• USDC depegging risk: In March 2023, USDC briefly traded at $0.87 following the Silicon Valley Bank collapse. Traders who bought USDC during the depeg at $0.87 and later sold at $1.00 realized a $0.13 gain per USDC — a 15% return that is separately taxable from any prediction market gains.
• Multiple USDC lots: If you purchased USDC at different prices (some at $1.00, some at $0.98 during a wobble), you need to track the cost basis of each lot. You can use FIFO (first in, first out), LIFO (last in, first out), or specific identification to determine which lot you're disposing of.

Bridge Fees and Gas as Deductible Expenses

Polymarket operates on the Polygon network. Getting funds to Polygon often requires bridging from Ethereum or another chain, incurring gas fees and bridge fees:

• Ethereum gas fees: Gas fees paid in ETH for transactions (approving USDC, bridging to Polygon) are deductible. Under the capital gains approach, gas fees can be added to your cost basis of the USDC or prediction market position. Typical gas fees range from $2-$50 depending on Ethereum network congestion.
• Bridge fees: Bridging USDC from Ethereum to Polygon (via the Polygon Bridge, Hop Protocol, or Across) incurs fees ranging from 0.04% to 0.5%. These are deductible as part of your cost basis.
• Polygon gas fees: Transaction fees on Polygon are minimal (fractions of a cent), but should still be tracked for completeness.
• ETH used for gas is a taxable disposition: When you spend ETH to pay gas fees, you are disposing of ETH (a capital asset). If your ETH has appreciated since purchase, spending it on gas triggers a capital gain on the ETH itself. For example, if you bought 0.01 ETH at $2,000/ETH ($20 cost basis) and spent it on gas when ETH was at $3,500/ETH ($35 value), you realize a $15 capital gain on the ETH, in addition to the $35 gas fee being deductible.

DeFi Lending of Idle USDC

Some Polymarket traders lend idle USDC on DeFi protocols (Aave, Compound) to earn yield between trades. This creates additional income:

• Interest income: USDC lending yields (typically 3-8% APY as of early 2026) are generally treated as ordinary income, not capital gains. Report on Schedule 1 as "Other Income" or Schedule C if you qualify as a business.
• Accrual vs. realization: DeFi interest typically accrues continuously as aTokens (Aave) or cTokens (Compound). The IRS has not issued clear guidance on when DeFi interest is "received" for tax purposes. Conservative approach: report interest as earned (accrual basis).
• Token rewards: If you receive governance tokens (AAVE, COMP) as additional rewards, these are taxable income at the fair market value when received, and any subsequent sale creates a separate capital gain or loss event.

Tracking All Crypto Tax Events: A Checklist

9. Platform Tax Comparison

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.

10. Step-by-Step Tax Filing Guide for Polymarket Traders

This walkthrough covers how to file taxes for a trader who used Polymarket in the 2025 tax year (filing in early 2026). The same principles apply to any tax year.

Step 1: Export Your Trade History

You need a complete record of every prediction market position you opened and closed during the tax year.

• Polymarket platform export: Log into Polymarket > Portfolio > History. Export your complete trade history as a CSV file. This includes market name, direction (Yes/No), quantity, price, and date for each trade.
• Blockchain records (backup): Go to Polygonscan and search your wallet address. Under the "Token Transfers" tab, you can see all USDC inflows and outflows. This serves as an independent backup to your Polymarket export.
• Third-party aggregation: Tools like PolyTax (polytax.io) and predictiontaxes.com can connect to your Polymarket wallet and automatically categorize trades, calculate gains/losses, and generate tax forms.

Step 2: Convert USDC Transactions to USD Cost Basis

For each USDC deposit and withdrawal, establish the USD cost basis:

Step 3: Calculate Gains and Losses Per Position

For each prediction market position that resolved or was sold during the tax year:

1. Determine cost basis: Number of shares x purchase price per share. Include any trading fees in your cost basis.
2. Determine proceeds: If the market resolved in your favor, proceeds = number of shares x $1.00. If it resolved against you, proceeds = $0. If you sold before resolution, proceeds = number of shares x sale price.
3. Calculate gain/loss: Proceeds minus cost basis = gain (positive) or loss (negative).
4. Determine holding period: Date sold/resolved minus date acquired. Under 1 year = short-term. Over 1 year = long-term.

Step 4: Fill Out IRS Forms

Using the capital gains approach, complete the following forms:

Form 8949: Sales and Other Dispositions of Capital Assets

• Check Box C at the top (transactions not reported on a 1099-B, since Polymarket doesn't issue one)
• Column (a): Description of property — e.g., "500 Yes shares - BTC over $100K June 2025 (Polymarket)"
• Column (b): Date acquired
• Column (c): Date sold or disposed
• Column (d): Proceeds
• Column (e): Cost or other basis
• Column (h): Gain or loss (column d minus column e)
• If you have many trades, you can attach a detailed statement and enter summary totals on Form 8949

Schedule D: Capital Gains and Losses

• Transfer your Form 8949 totals to Schedule D
• Part I, Line 7: Short-term capital gain or loss totals
• Part II, Line 15: Long-term capital gain or loss totals (if any)
• Part III: Summary — calculates your total net capital gain or loss

Schedule 1 (if applicable): Additional Income

• If you earned DeFi lending income on USDC, report on Line 8z as "Other Income"
• If you received referral bonuses from any platform, report on Line 8z

Form 8938 / FinCEN 114 (if applicable)

• If your Polymarket International account balance exceeded $10,000 at any point, file FinCEN Form 114 (FBAR) electronically via the BSA E-Filing system by April 15 (automatic extension to October 15)
• If your foreign financial assets exceeded $50,000 at year-end (or $75,000 at any point), file Form 8938 with your tax return

Step 5: Use Tax Software to Streamline Filing

Several software tools can automate or simplify prediction market tax reporting:

11. Real Tax Scenarios: 5 Worked Examples

These examples illustrate how prediction market taxes work in practice. All scenarios use the recommended capital gains approach and assume the 2026 tax year. Tax rates are federal only; state taxes would be additional.

12. Tax-Loss Harvesting for Prediction Markets

Tax-loss harvesting is the strategy of selling losing investments before year-end to realize capital losses that offset capital gains. This well-known strategy from stock investing applies to prediction markets with some important differences.

How It Works for Prediction Markets

If you hold prediction market positions that have declined in value but haven't resolved yet, you can sell them on the open market to realize a loss. This crystallizes the loss for tax purposes in the current year.

Wash Sale Rules: The Gray Area

In stock trading, the IRS wash sale rule (IRC Section 1091) disallows a loss deduction if you repurchase "substantially identical" securities within 30 days before or after the sale. For prediction markets, the applicability is unclear:

• Identical contracts: If you sell a losing position on "Will X happen?" and immediately buy the same contract back, a strict interpretation of wash sale rules would disallow the loss. However, prediction market contracts are arguably not "stock or securities" as defined in Section 1091.
• The IRS has not addressed this: There is no Revenue Ruling, Private Letter Ruling, or case law applying wash sale rules to prediction market contracts or event contracts specifically.
• Conservative approach: Wait 31 days before repurchasing the same contract if you want maximum certainty that the loss deduction will stand.
• Aggressive approach: Sell and immediately repurchase, arguing that prediction market event contracts are not "stock or securities" under Section 1091. This position is defensible but untested.
• Related but not identical: If you sell a losing position on "Will the Fed cut rates in January?" and buy "Will the Fed cut rates in March?", these are clearly different contracts and wash sale rules would not apply even under the most conservative interpretation.

Strategies for Year-End Tax Management

1. Review open positions in November: Identify positions with unrealized losses that you can sell before December 31. On Polymarket, you can see the current market price of your open positions in your Portfolio tab.
2. Prioritize deep losers: Focus on positions where the market has moved significantly against you and the probability of recovery is low. Selling a position at $0.05 that you bought at $0.60 captures a $0.55/share loss.
3. Consider transaction costs: On Polymarket, selling has minimal fees. On Kalshi, fees can eat into the tax benefit of harvesting small losses.
4. Don't let tax tail wag the dog: Only harvest losses on positions you would be willing to exit anyway. Selling a position you believe will eventually win just for a tax benefit can cost you more than the tax savings.
5. Pair with gains: If you have both unrealized gains and losses, consider selling both to lock in a lower net gain. This is especially valuable if you expect to be in a lower tax bracket next year.
6. Document everything: Keep records of why you sold (including screenshots of market prices at the time of sale) in case the IRS questions your loss deductions.

13. 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

New 2026 Crypto Broker Reporting Rules (Form 1099-DA)

• Starting with 2026 tax year (filing in 2027), crypto brokers must issue Form 1099-DA (Digital Asset Proceeds from Broker Transactions) for transactions exceeding $600
• This applies to centralized exchanges (Coinbase, Kraken) and potentially to platforms like Polymarket US if classified as a broker
• Form 1099-DA will report gross proceeds, cost basis (if known), gain/loss, and holding period
• DeFi protocols and non-custodial wallets have a delayed implementation timeline (starting 2027 tax year)

State Tax Considerations for 2026

Prediction market gains are also subject to state income tax. Key high-tax states to be aware of:

AMT Implications for Large Traders

The Alternative Minimum Tax (AMT) can affect high-income prediction market traders. Key points:

• The 2026 AMT exemption is approximately $85,700 (single) and $133,300 (married filing jointly). These amounts phase out at higher income levels.
• Short-term capital gains from prediction markets are included in AMT income, but they do not create an AMT preference item. However, large gains can push you above the phase-out threshold, reducing your exemption.
• If you claim Section 1256 treatment, the 60/40 split also applies for AMT purposes (Form 6251). The long-term portion is taxed at the AMT capital gains rate (maximum 20%).
• State and local tax (SALT) deductions are capped at $10,000 for regular tax. Under AMT, SALT is not deductible at all. High-earning traders in states like California or New York should check for AMT liability.
• If you have significant prediction market income, run your tax return through AMT calculations or use tax software that automatically checks. TurboTax, H&R Block, and professional tax software all include AMT calculators.

14. IRS Reporting Requirements & Audit Risk

Understanding what the IRS knows (and doesn't know) about your prediction market activity helps you assess your reporting obligations and audit risk.

What the IRS Already Knows

• Kalshi 1099-INT and 1099-MISC: These forms are filed with the IRS. If Kalshi reports $50 in interest income to you, the IRS has a matching record. Failing to report this income will trigger an automated CP2000 notice.
• Robinhood 1099-B: Robinhood reports all event contract trades on 1099-B, which is filed with the IRS. The IRS will match this against your Form 8949/Schedule D.
• Crypto exchange reports: If you purchased USDC on Coinbase, Kraken, or another US exchange, those platforms issue 1099-MISC (for rewards) and 1099-B (for crypto sales). The IRS can see your USDC on-ramp transactions.
• Blockchain analytics: The IRS has contracts with Chainalysis and other blockchain analytics firms. They can trace USDC flows from exchanges to Polymarket wallets and identify users via KYC records at the exchange level.

What the IRS Doesn't Easily Know (But Can Discover)

• Polymarket International gains: Polymarket International issues no tax forms and has no reporting agreement with the IRS. However, the IRS can still trace funds if you on-ramped through a US exchange.
• Peer-to-peer USDC purchases: If you acquired USDC through P2P trades without going through a KYC exchange, the IRS has less visibility. However, when you eventually convert back to USD at a US exchange, the off-ramp is visible.
• Foreign exchange activity: If you used non-US exchanges to acquire USDC, the IRS relies on information-sharing agreements (e.g., CRS) and FBAR/FATCA filings to identify this activity.

Audit Triggers for Prediction Market Traders

The IRS uses algorithms to select returns for audit. These factors increase your risk:

1. Large gains with no matching 1099: If your Schedule D shows $50,000 in capital gains but no 1099-B was filed by any broker, the IRS may flag this for review to verify you aren't overstating cost basis or understating proceeds.
2. Significant crypto activity: The IRS has made cryptocurrency compliance a priority. Returns with crypto-related forms (Form 8949 entries for digital assets) may receive additional scrutiny.
3. Inconsistency between crypto and income: If Coinbase reports you purchased $100,000 in USDC (on their 1099) but your return shows no corresponding investment income, this creates a red flag.
4. Failure to answer the crypto question: Since 2020, Form 1040 has included a question about digital asset activity. Answering "No" when you traded on Polymarket is a false statement that can support penalties.
5. Large Schedule D losses: Claiming $50,000+ in capital losses from prediction markets (especially without a matching 1099-B) may trigger review.
6. Claiming Section 1256 for non-Kalshi platforms: Using Form 6781 for Polymarket trades (not traded on a DCM) is an aggressive position that could be challenged.

FBAR Requirements for Non-US Platforms

If you hold funds on Polymarket International (or any non-US prediction market platform), you may have FBAR filing obligations:

• Who must file: US persons (citizens, residents, green card holders) with financial interest in or signature authority over foreign financial accounts exceeding $10,000 in aggregate at any point during the calendar year.
• Does Polymarket International qualify? Unclear. The FinCEN has not specifically addressed whether offshore crypto platform accounts are "foreign financial accounts." However, the conservative approach (and the approach recommended by most tax professionals) is to file if your balance exceeds $10,000.
• How to file: FinCEN Form 114 (FBAR) is filed electronically through the BSA E-Filing system. It is separate from your tax return.
• Deadline: April 15, with automatic extension to October 15. No need to request the extension.
• Penalties for non-filing: Non-willful failure to file: up to $12,500 per account per year. Willful failure to file: the greater of $100,000 or 50% of the account balance per year. Criminal penalties are also possible.

Record-Keeping Best Practices

15. International Tax Considerations

Prediction market taxation varies dramatically by country. This section covers the major jurisdictions.

United Kingdom (HMRC)

The UK has historically treated gambling winnings as tax-free for individuals. However, prediction market contracts may not qualify for this exemption:

• Gambling exemption: Under the Betting and Gaming Duties legislation, casual gambling winnings are not subject to Income Tax or Capital Gains Tax. This exemption was established in the 2001 Finance Act when the UK abolished gambling tax on punters.
• When it doesn't apply: If HMRC considers your prediction market activity to be "trading" (i.e., conducted with sufficient frequency, organization, and skill to constitute a trade), profits may be subject to Income Tax at rates up to 45% (additional rate for income over 125,140 pounds). Indicators of trading include: high volume of trades, sophisticated strategies, use of analytics tools, and it being a significant source of income.
• Financial derivatives: If prediction markets are classified as Contracts for Difference (CFDs) or financial spread bets, the spread betting exemption (tax-free for UK residents) may apply. However, Polymarket contracts are not formally classified as spread bets by the FCA.
• Crypto layer: HMRC treats cryptocurrency as property. Gains from disposing of crypto (including USDC) are subject to Capital Gains Tax at 10% (basic rate) or 24% (higher rate, increased from 20% in the October 2024 Autumn Budget). The annual CGT allowance for 2025-26 is 3,000 pounds.
• Practical recommendation: Most UK residents can likely treat casual Polymarket winnings as tax-free gambling income. However, if you trade frequently or earn significant amounts, consult a UK tax advisor to assess whether HMRC might classify your activity as trading.

European Union

EU member states each have their own tax treatment of prediction markets and gambling:

• Germany: Capital gains from financial instruments held less than one year are taxable as income (up to 45% rate). Gains from financial instruments held over one year are generally tax-free. If classified as gambling, winnings are tax-free for casual gamblers. Crypto held over one year is tax-free under the German Einkommensteuergesetz Section 23.
• France: Gambling winnings are generally tax-free for casual gamblers. However, "habitual" or "professional" gamblers are subject to income tax. Crypto gains are subject to the flat tax (PFU) of 30% (12.8% income tax + 17.2% social contributions), or optionally the progressive income tax scale. The 305 euro annual crypto exemption applies.
• Netherlands: The Netherlands taxes a deemed return on assets (Box 3 tax) rather than actual gains. Your prediction market holdings are included in your taxable capital base, with a deemed return taxed at 36% (2026 rate). Actual gains and losses are irrelevant for Box 3 purposes.
• Portugal: Crypto gains held less than one year are taxed at 28%. Gains from crypto held over 365 days are tax-free. Gambling winnings from licensed operators are subject to a 25% stamp duty. Unlicensed platform winnings (e.g., Polymarket) fall into a gray area.
• Ireland: Gambling winnings are generally tax-free. Capital Gains Tax on investments is 33%. If prediction markets are classified as investment instruments, CGT applies.

Canada (CRA)

The Canada Revenue Agency has a nuanced approach to gambling and investment income:

• Casual gambling: Gambling winnings are generally not taxable for casual gamblers in Canada. The CRA considers windfall gains to be non-taxable. This has been confirmed in multiple Tax Court of Canada decisions (e.g., Leblanc v. The Queen, 2007 TCC 220).
• Professional gambling: If the CRA considers you a professional gambler (gambling is your primary income source, conducted with regularity and organization), winnings are taxable as business income on Line 13500 of the T1 return.
• Capital gains treatment: If prediction market contracts are treated as capital property, only 50% of capital gains are included in income (the "inclusion rate"). However, the 2024 federal budget proposed increasing the inclusion rate to 66.7% for gains above $250,000 annually, though implementation has been uncertain.
• Crypto reporting: CRA treats cryptocurrency as a commodity. Dispositions (including USDC conversions) trigger capital gains or business income. Form T5008 may be issued by Canadian crypto exchanges.

Australia (ATO)

The Australian Taxation Office treats gambling and investment income differently:

• Recreational gambling: The ATO generally does not tax gambling winnings for recreational gamblers. This includes prediction markets used for entertainment purposes. The test is whether gambling is a "business activity" or a "recreational pursuit."
• Professional gambling: If the ATO determines you are carrying on a gambling business (regular, systematic, organized activity conducted for profit), all winnings are assessable income under Section 6-5 of the Income Tax Assessment Act 1997. Losses are deductible as business expenses.
• CGT event: If prediction market contracts are classified as CGT assets, gains are taxed under the CGT regime. Australian residents get a 50% CGT discount for assets held over 12 months. The CGT discount does not apply to short-term holdings.
• Crypto: ATO actively monitors crypto transactions. Australian exchanges report to the ATO. USDC conversions are CGT events. The ATO's data-matching program specifically targets crypto traders.
• GST: Financial services (including regulated derivatives) are GST-free. Gambling is also GST-free for the consumer. Prediction market trades should not incur GST.

16. Tips for Reducing Your Tax Bill

1. Use the capital gains approach — it's the most widely recommended and allows full loss deduction (vs the 90% cap under gambling treatment)
2. Harvest losses — if you have losing positions, sell them before year-end to offset gains
3. Keep detailed records — track every trade with date, cost basis, and proceeds. Use platform export tools or third-party trackers
4. Consider holding period — if you hold a position over 1 year, it qualifies as long-term capital gains (20% max rate vs 37%)
5. 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
6. Don't ignore it — the IRS has blockchain analytics tools. Unreported crypto income is increasingly detectable
7. Offset gains across asset classes — prediction market losses can offset stock market gains, and vice versa, under the capital gains approach. If you have a losing year on Polymarket but gains in your stock portfolio, the prediction market losses reduce your overall tax bill.
8. Contribute to tax-advantaged accounts — while you cannot trade prediction markets in an IRA, maximizing your 401(k), IRA, and HSA contributions reduces your taxable income, which can lower the tax rate applied to your prediction market gains
9. Time your exits strategically — if you're near the boundary between tax brackets (e.g., $95,375 for single filers in 2026, the 22%/24% boundary), consider deferring the realization of some gains to the following year
10. Make estimated tax payments — if you expect to owe more than $1,000 in tax from prediction market gains, make quarterly estimated payments (Form 1040-ES) by April 15, June 15, September 15, and January 15. This avoids underpayment penalties.

17. PredScope Tax Estimator

Use this calculator to estimate your federal tax liability on prediction market gains under each treatment method. This is a simplified estimate — consult a CPA for precise calculations.

Frequently Asked Questions

Related Guides

• Prediction Markets vs Sports Betting — Key differences, legal status, and which is better
• Kalshi Promo Code 2026 — Current bonuses and referral deals
• Polymarket Fees Explained — Trading, deposit, and withdrawal costs
• How to Trade on Polymarket — Step-by-step trading guide
• How to Use Kalshi — Kalshi beginner's guide
• Is Polymarket Legal? — Country-by-country legality
• Are Prediction Markets Gambling? — Legal classification
• Polymarket vs Kalshi — Full platform comparison
• Best Prediction Markets 2026 — Top platforms ranked
• What Are Prediction Markets? — Complete introduction
• Prediction Market Glossary — 40+ key terms explained
• Crypto Prediction Markets — BTC, ETH, and crypto trading
• Prediction Market Accuracy — How accurate are the odds?
• Prediction Market Arbitrage — Find risk-free profit opportunities
• Polymarket Review 2026 — Is it legit, safe, and worth using?
• Election Betting Odds 2028 — Latest election predictions and odds
• Kalshi Review 2026 — Full review of the regulated US platform
• How to Make Money on Prediction Markets — Strategies and tips for profitable trading
• How to Deposit on Polymarket — Step-by-step deposit guide
• How to Withdraw from Polymarket — Cash out your winnings
• Polymarket Promo Code 2026 — Latest bonuses and promotions
• Event Contracts: What They Are & How to Trade — CFTC-regulated binary contracts explained
• Kalshi Taxes Guide — Kalshi-specific tax reporting, 1099 forms, and tips