Last Updated on July 19, 2026 by Patrick Camuso, CPA
Quick answer (read this first):
The problem: Polymarket’s on-chain platform does not issue Form 1099-B, 1099-DA, or W-2G. Traders receive no standardized tax documentation summarizing their activity in order to report Polymarket taxes. The absence of information reporting does not eliminate the tax obligation.
What the IRS requires: Gains from prediction market activity are taxable regardless of whether a form is issued. The reporting obligation rests entirely with the taxpayer, including the obligation to reconstruct transaction history, establish cost basis, and characterize income under applicable law.
What self-reporting requires: A complete reconstruction of contract acquisitions and dispositions from Polymarket portfolio history, on-chain records, and wallet data. A defensible tax characterization applied consistently. Accurate form completion without a 1099 as a starting point.
Why characterization is not straightforward: The IRS has issued no guidance specific to prediction market contracts. Polymarket’s on-chain, crypto-settled structure introduces additional analytical layers absent from USD-settled platforms. Four analytical frameworks are discussed. The correct one is not predetermined by the platform’s architecture.
Polymarket is one of the most active prediction markets operating today. Polymarket’s current on-chain exchange uses pUSD as its collateral and user-facing redemption asset. pUSD is an ERC-20 token on Polygon backed one-for-one by USDC. Users may deposit or withdraw supported assets through platform conversion mechanics, but outcome-token splitting, merging, and redemption operate through pUSD. Polymarket today operates through two environments. The on-chain platform provides no standardized tax forms to traders. Polymarket’s U.S. platform operates through QCX LLC, a CFTC-designated contract market that Polymarket acquired in 2025, under an amended CFTC order of designation issued in November 2025; its structure and documentation differ and should be confirmed directly. This article focuses on on-chain, self-custodied Polymarket activity, which creates the hardest reporting problems. There is no Form 1099-B arriving in January to anchor a reporting position. There is no cost basis figure from a broker. There is no official characterization of how income should be reported.
The taxpayer must reconstruct the record, apply a defensible analytical framework, and report accurately without any of the scaffolding that supports reporting on conventional financial platforms.
This article addresses Polymarket specifically. The broader analytical foundation, including how U.S. tax law applies to prediction market contracts across platforms, why USD settlement does not simplify the analysis, and why reasonable professionals disagree on characterization is developed in our comprehensive guide: Prediction Market Taxes Explained: Why U.S. Tax Characterization Remains Unsettled. Readers dealing with Kalshi specifically should also see our analysis of Kalshi tax reporting and our dedicated treatment of Section 1256 and prediction markets.
How Polymarket Contracts Work
Polymarket markets operate through binary event contracts. A market presents a defined proposition, whether a candidate wins an election, whether an economic figure exceeds a threshold, whether a specified event occurs by a stated date. Traders acquire Yes or No shares representing a contingent right to a $1 payout per share if the specified outcome occurs, and a $0 payout if it does not. Complete sets of Yes and No outcome tokens are backed by pUSD, and the combined value of a Yes and No pair corresponds to the $1 of pUSD collateral backing each complete set before resolution. A winning outcome token may be redeemed for pUSD after resolution, subject to the platform’s current mechanics.
Traders may hold contracts to resolution or sell them in the secondary market as probabilities shift. The two endings are not automatically the same for tax purposes. An actual pre-resolution sale of the contract to another participant for consideration may be described as a sale. The treatment of a position held to resolution, including resolution at zero, depends on the contract terms and settlement mechanics and should not be generically classified.
Polymarket’s current on-chain exchange operates on the Polygon network and uses pUSD, an ERC-20 token backed one-for-one by USDC, as its collateral and user-facing redemption asset; underlying conversion and protocol mechanics may involve native USDC. pUSD and USDC are dollar-pegged digital assets, but each is property for U.S. federal income tax purposes, not cash. The IRS treats digital assets as property under general tax principles. Redemption proceeds received in pUSD constitute receipt of property with a fair market value equal to the pUSD received at the time of redemption, not a deposit of dollars. Do not assume a stablecoin always has tax basis equal to its stated value. Conversions between pUSD and USDC, and a later exchange of pUSD or USDC for USD or another asset, are separate transactions to evaluate under the property rules based on the actual transaction mechanics and ownership facts, though gain or loss is typically immaterial while the pegs hold. Each of these events should be reflected in the tax record.
Because on-chain Polymarket activity occurs entirely on-chain, taxpayers must often reconstruct transaction history from wallet-level data, on-chain records, and platform exports. Every transaction is permanently recorded on the Polygon blockchain. That record is publicly accessible and, through blockchain analytics tools in use by the IRS, traceable to identified taxpayers via centralized on-ramps and off-ramps.
Why There Is No Form 1099
Polymarket’s on-chain platform does not issue Form 1099-B, 1099-DA, or W-2G. This reflects the platform’s architecture rather than a judgment about taxpayer obligations. On the on-chain platform, user funds are held in smart contracts rather than platform-managed accounts, and the identification information that information reporting requires has not historically been collected there. The regulated U.S. platform operates under a different structure, and its reporting practices should be confirmed directly before relying on them.
The IRS finalized Form 1099-DA reporting obligations for digital asset brokers in 2024, with application to 2025 transactions. The broker definition under those rules centers on custodial intermediaries. Treasury’s finalized digital asset broker regulations primarily target custodial intermediaries. Decentralized platforms without customer custody remain outside the immediate reporting framework, though future regulatory expansion remains possible. Prediction market platforms present additional classification questions because event-based contracts do not map cleanly onto the transaction types the 1099-DA rules were designed to capture. This remains an area to monitor as regulatory interpretation develops.
For a full analysis of how Form 1099-DA affects digital asset investors and what broker reporting means for existing compliance obligations, see our guide to Form 1099-DA compliance.
The practical consequence for on-chain Polymarket traders is that the entire reporting burden rests with the taxpayer. There is no form to reconcile against and no basis figure to accept or correct. The obligation to report is no less real for the absence of documentation. It is simply more operationally demanding to satisfy.
Are Polymarket Winnings Taxable?
Yes. Gains from Polymarket activity are generally taxable under existing U.S. tax law. The absence of a tax form from the platform does not alter this analysis.
The relevant question is not whether income is taxable but how it is characterized and where it is reported. Those questions are governed by separate analytical frameworks, and the correct answer is not predetermined by the platform’s structure, settlement currency, or regulatory status. The IRS has issued no guidance specifically addressing prediction market contracts, which means existing statutory regimes must be applied to novel fact patterns.
A contract that resolves unfavorably does not disappear for tax purposes. The position remains part of the tax record, but resolution at zero should not automatically be described as a sale, lapse, abandonment, or worthlessness event, and it does not automatically produce a recognized deductible loss. The treatment of the loss side depends on the same unresolved characterization analysis that applies to gains, together with the separate recognition and allowance rules.
Tax Characterization: The Analytical Frameworks
Four analytical frameworks are discussed for prediction markets. The Code was not written with event-based markets in mind. Prediction market contracts do not map cleanly onto securities, commodities futures, options, or wagering transactions. As a result, there is no single authoritative answer. This article does not assert a single correct outcome. Each framework reflects a defensible interpretation of existing law. The appropriate choice depends on the facts and the specific structure of a taxpayer’s activity. What is not defensible is failing to analyze the question, adopting a position without documentation, or changing frameworks year to year without a reasoned basis.
Realization and Character Are Separate Questions
When a Polymarket trader sells a contract to another participant for consideration, gain or loss is generally determined under the general realization rules. The treatment of a position held to resolution depends on the contract terms and settlement mechanics. Whether and when gain or loss is recognized is a separate question from how it is characterized.
Character analysis comes after, not instead of, that analysis. A common error is to conflate the two, treating characterization as something that determines whether a taxable event occurred rather than as something that determines how a recognized gain or loss is treated. On Polymarket, both questions arise independently for each position.
Framework 1: Property and Capital Asset Analysis
Under this framework, a Polymarket contract is treated as a transferable contractual right that constitutes property in the taxpayer’s hands. The trader acquires that right for consideration, establishes basis at acquisition cost, and recognizes gain or loss on disposition. Character is then analyzed under §1221, which defines a capital asset as property held by the taxpayer other than items specifically excluded by the statute.
The capital asset analysis is fact-dependent. A capital asset in one taxpayer’s hands may not be a capital asset in another’s. Traders who approach prediction markets as investments, researching outcomes, holding positions based on probability analysis, treating contracts as part of a broader portfolio have a different factual profile than those whose activity more closely resembles speculation or wagering. Neither profile automatically resolves the §1221 question, but facts bear on how the argument is constructed and supported.
Where capital treatment is applied, short-term positions produce short-term capital gain or loss taxed at ordinary rates. Positions held more than one year produce long-term capital gain or loss at preferential rates. Net capital losses can offset capital gains from other sources, with up to $3,000 per year of excess losses deductible against ordinary income.
The principal risk under capital treatment is recharacterization. If the IRS concludes that Polymarket contracts are not capital assets, whether because they more closely resemble contingent wagering instruments, because the taxpayer’s activity lacks investment character, or because a future guidance development resolves the question adversely, gains would be recharacterized as ordinary income. Depending on when recharacterization occurred and what penalties applied, the tax consequence could be substantially worse than ordinary income reporting from the outset.
Framework 2: Ordinary Income and Non-Equity Contract Analysis
Under this framework, prediction market contracts are treated as contingent payoff instruments that do not constitute capital assets, and gain and loss are ordinary in character. Ordinary character alone, however, does not establish recognition, deductibility, placement, limitation, or netting. For an individual, an otherwise allowable ordinary nonbusiness Section 165(c)(2) loss outside a sale or exchange is a miscellaneous itemized deduction currently disallowed under Section 67(h). For the full loss framework, see our prediction market loss deductions analysis.
Ordinary income treatment under this framework is not gambling treatment. These are analytically distinct positions with different loss rules, and neither one’s loss answer is automatic.
Traders who default to ordinary income reporting because it is simpler should be aware that simplicity alone is not a sufficient basis for a reporting position. The framework should be adopted because it reflects a defensible characterization of the taxpayer’s activity, documented as such, and applied consistently. A position adopted for convenience is no more defensible under examination than one adopted for rate optimization.
The Gambling Framework: A Separate Question
The gambling framework treats prediction market activity as wagering under IRC §165(d). Whether the wagering rules apply to any particular Polymarket contract remains unresolved. This framework imposes significant limitations. For an individual’s nonbusiness wagering activity, allowable wagering losses generally require itemizing. If the activity rises to the level of a trade or business, the reporting placement may differ, but Section 165(d) still prevents wagering losses from exceeding wagering gains. For tax years beginning after December 31, 2025, the deduction is limited to 90 percent of wagering losses.
The measurement question adds real complexity. Published guidance does not establish a required transaction or session unit for continuous prediction-market activity. Notice 2015-21 proposed an optional safe harbor for electronically tracked slot-machine play and does not resolve the proper unit for prediction-market contracts.
If the wagering rules apply, the unit used affects the calculation of gross winnings reportable as income and, by extension, the ceiling on deductible losses, so any method adopted should be documented and applied consistently. Different supportable methods can produce materially different results, which is one reason the wagering framework is operationally demanding for continuous on-chain activity.
For tax years beginning after December 31, 2025, the deduction for wagering losses is limited to 90 percent of losses and may not exceed wagering gains. Under that rule, even a trader who breaks even economically can owe tax. Without an established measurement unit, the exposure is harder to estimate in advance.
Beyond the federal mechanics, state tax treatment introduces additional exposure. A number of states tax gambling winnings but do not permit deductions for gambling losses. For a tax year beginning after December 31, 2025, a taxpayer with $60,000 of wagering gains and $55,000 of wagering losses would have a maximum loss deduction of $49,500, equal to 90 percent of the wagering losses. The taxpayer would therefore have $10,500 of federal net wagering income under that framework. A state that taxes gambling winnings without permitting loss deductions may tax the full $60,000. In high-tax states, this phantom income can produce a state liability that significantly exceeds what the federal net figure suggests. The unresolved measurement question can amplify this exposure at the state level.
The gambling framework is analytically available for some contracts and is distinct from ordinary income treatment. Treating the two as interchangeable reflects a misunderstanding of how each framework operates: the loss rules differ materially, and neither framework’s loss answer is automatic.
Section 1256: An Analytical Question, Not a Default
Section 1256 applies a specialized tax regime with mark-to-market treatment and a 60/40 blended capital gain rate to a specific enumerated set of contract types including regulated futures contracts, foreign currency contracts, nonequity options, dealer equity options, and dealer securities futures contracts. The blended rate produces a maximum federal rate materially below the top ordinary rate regardless of holding period. Section 1256 also allows a three-year carryback of net losses against prior §1256 gains, which is a meaningful benefit unavailable under the general capital loss rules. These mechanics explain why §1256 is frequently raised in discussions involving prediction market contracts. Section 1256 is not a taxpayer election.
For Polymarket specifically, the venue element requires attention. The regulated futures contract category under §1256(g)(1) requires that the contract be traded on a qualified board or exchange. Polymarket’s on-chain platform is not a CFTC-designated contract market. Following Polymarket’s 2025 acquisition of QCX LLC, its U.S. platform operates through a CFTC-designated contract market under an amended order of designation. Venue status is only one element: it does not establish that any contract satisfies the enumerated statutory categories.
A further issue for Polymarket is the binary event-based structure of its contracts. Regulated futures contracts historically have involved commodities, financial instruments, indices, interest rates, or currency values. Contracts that resolve based on discrete factual outcomes such as whether a candidate wins, whether legislation passes, whether an economic reading exceeds a threshold raise interpretive questions about whether the underlying reference fits within §1256. The statute does not expressly address event-based contracts, and no IRS guidance has resolved the question.
Section 1256 treatment for Polymarket contracts should not be claimed without formal legal analysis establishing that the specific contracts at issue meet the applicable statutory definitions. Economic similarity to regulated derivatives, the binary structure of outcomes, or the fact that Polymarket operates on a blockchain does not establish eligibility. The statute is a narrowly defined override of the general tax rules, and it applies only where its requirements are affirmatively satisfied.
Recordkeeping Without a 1099
Because Polymarket’s on-chain platform does not issue tax forms, the taxpayer bears the full burden of constructing a complete and accurate record. This burden does not arise only when an IRS inquiry is received. It arises at the time of filing, when the taxpayer must be able to substantiate every position taken on the return.
Users should preserve records of deposits and withdrawals, conversions between USDC and pUSD, acquisition costs, outcome-token purchases and sales, splits, merges, fees, incentives, resolution, redemption proceeds, wallet activity, and any later disposition of pUSD or USDC. A defensible record also requires a documented inventory of every Polygon wallet address used in connection with Polymarket activity, since on-chain data is organized by address rather than by taxpayer identity.
Transaction history is recoverable from multiple sources. Polymarket’s native portfolio export provides a starting point. PolygonScan and other Polygon network explorers preserve the full on-chain record by wallet address. Crypto tax software platforms that support Polygon wallet import can assist with normalization, but output from automated platforms requires manual review. Prediction market contract acquisitions and dispositions are frequently misclassified by tools designed primarily for token transfers and DeFi interactions. Filing-grade data requires verification against source records.
Where historical records are incomplete, due to lost credentials, platform export limitations, or years of unreconciled self-custody activity, reconstruction from on-chain evidence may be required. That process is distinct from routine record organization and involves an evidentiary framework for converting unavailable records into documented, defensible tax positions. See our analysis of crypto cost basis reconstruction when exchange history is gone for a full treatment of that process.
The IRS statute of limitations generally runs three years from the filing date. For returns on which income is substantially underreported the period extends to six years. There is no statute of limitations where fraud is present. Wallet addresses and on-chain identifiers should be retained indefinitely, independent of the applicable tax period. If you need assistance with historical accounting and digital asset cost basis reconstruction you can contact our team here.
Self-Reporting Without a Form 1099
Establishing Cost Basis and Gain or Loss
The foundation of reporting is a complete contract-level inventory. For each contract acquired during the tax year, the cost basis is the pUSD paid to purchase the shares (or, for periods before the exchange’s pUSD migration, the USDC paid), including directly attributable fees. For each contract sold, proceeds are the pUSD or USDC received. Contracts that resolve at $0 leave the acquisition cost in the record with no offsetting receipt; how that economic loss is treated depends on the characterization, recognition, and allowance analysis described above. Where the same contract is acquired at multiple price points across time, a consistent lot identification method must be applied. FIFO is a common convention. Specific identification is available where lots are documented at the time of each acquisition, not retroactively. Whichever method is adopted should be applied consistently across the portfolio and from year to year.
Form Selection
Where the capital asset framework is applied, dispositions are reported on Form 8949, which captures each contract’s acquisition date, disposition date, proceeds, and adjusted basis. Net amounts transfer to Schedule D and ultimately flow to Form 1040. Short-term and long-term positions are segregated based on holding period from acquisition date to settlement or sale date.
Where an ordinary framework is applied, placement and reporting depend on the taxpayer’s facts, and the loss side raises the separate allowance and placement questions discussed above. Ordinary character alone does not determine netting, deduction placement, or loss allowance.
Form 1040 has included the digital-asset question since the 2020 tax year. Polymarket trading, involving the acquisition, disposition, and receipt of digital assets such as outcome tokens, pUSD, and USDC, triggers an affirmative answer to that question. Checking “No” when Polymarket activity occurred during the year is inconsistent with the facts and potentially constitutes a false statement on a federal return.
pUSD and USDC as Property
Several stablecoin-related events arise independently of the contract-level analysis and require separate treatment. Redemption proceeds received in pUSD constitute receipt of property with a fair market value equal to the pUSD received at the time of redemption. This is distinct from whether the pUSD has been converted to USDC or withdrawn to USD. Conversions between pUSD and USDC are evaluated under the property rules based on the actual transaction mechanics and ownership facts; no conversion is automatically taxable or automatically nontaxable. A later sale, exchange, or other taxable disposition of pUSD or USDC, including an exchange for USD or another asset, is evaluated separately, and gain or loss is typically immaterial while the pegs hold. Where a peg does not hold, a disposition produces a separately recognizable gain or loss equal to the difference between basis and proceeds.
Why the Blockchain Does Not Create a Reporting Blind Spot
A persistent assumption in prediction market communities is that decentralized, no-1099 platforms are effectively invisible to enforcement. That assumption does not accurately reflect how the IRS approaches digital asset compliance.
Every transaction executed on Polymarket’s on-chain platform is permanently recorded on the Polygon blockchain and accessible to any party with the tools to analyze it. The blockchain then provides the full transaction history attached to that address.
The Form 1040 digital asset question reinforces this exposure. A taxpayer who traded on Polymarket during the year and checks “No” to the digital asset question has made a representation about their tax year that is contradicted by the on-chain record. Where that record is later identified through analytics or summons activity, the false answer compounds the underlying reporting failure.
Voluntary compliance before an IRS inquiry creates substantially better outcomes than discovery during examination. The penalties for substantial understatement of income are 20% of the underpayment. Fraud penalties are 75%. Interest accrues from the original due date. Amended returns and proactive disclosure consistently produce lower total cost than examination responses after the IRS has initiated contact.
Future Guidance May Change the Analysis
The analytical frameworks described in this article reflect the current state of analysis in the absence of specific IRS guidance. That state is not static. Prediction markets are attracting regulatory attention from the IRS, Treasury, and CFTC, and the volume of activity on these platforms has grown to a scale that makes guidance more likely than it was several years ago.
Future guidance could resolve the capital versus ordinary income question for prediction market contracts generally or for specific platform types. It could bring certain platforms within or outside the Form 1099-DA broker reporting framework. It could address the proper measurement unit for continuous on-chain prediction market activity. It could clarify the Section 1256 question for CFTC-regulated platforms and the downstream implications for non-regulated ones.
The possibility of prospective guidance does not suspend current reporting obligations. Taxpayers must file returns based on applicable law as it currently exists. Where a position is reasonable, consistently applied, and documented, it remains defensible even if subsequent guidance resolves the underlying question differently, provided the position was not frivolous at the time it was taken.
Camuso CPA monitors IRS guidance, CFTC rulemaking, and legislative activity in the prediction market space.
Bottom Line
Polymarket traders face two concurrent compliance problems, no tax forms summarizing on-chain activity, and no IRS guidance definitively resolving how prediction market contracts should be characterized. Neither problem reduces the reporting obligation. Both increase the importance of doing the analytical work correctly.
The reporting obligation begins with reconstruction. Without a complete contract-level record, gain and loss calculations are not possible and any characterization choice is unsupported. Reconstruction should precede framework selection, not follow from it. Characterization requires a reasoned analysis of which framework applies to the taxpayer’s specific activity pattern and fact profile.
The frameworks available carry different rate implications, different loss treatment mechanics, and different audit risk profiles. The gambling framework is analytically distinct and carries operational and state-tax burdens that are frequently underestimated. Section 1256 requires formal statutory analysis before it can be responsibly claimed for Polymarket contracts. Whatever framework is adopted, the position must be documented, applied consistently from year to year, and capable of withstanding examination without relying on the absence of information reporting as a substitute for substantiation.
Camuso CPA specializes in prediction market tax reporting for Polymarket, Kalshi, and other platforms. We reconstruct transaction histories from on-chain and platform-level sources, analyze characterization questions under current authority, and prepare filing-grade returns with written analysis memos documenting the framework applied and the reasoning behind it. Explore our prediction market tax reporting service, cryptocurrency tax planning, cryptocurrency tax resolution, crypto cost basis reconstruction, and our full cryptocurrency accounting services.
Press Coverage
Patrick Camuso, CPA has been quoted on prediction market taxation across major financial publications:
Press Coverage
Patrick Camuso, CPA has been quoted on prediction market taxation across major financial publications:
Frequently Asked Questions On Polymarket Taxes
Do I have to report Polymarket activity if I received no tax form?
Yes. The absence of a Form 1099 does not eliminate the reporting obligation. Prediction market gains are not excluded. The fact that the on-chain platform provides no standardized tax forms shifts the burden of documentation and reporting entirely to the taxpayer, but it does not reduce the scope of what must be reported.
Is ordinary income treatment the same as gambling treatment?
No. These are analytically distinct reporting positions that are frequently conflated but operate under different statutory regimes with meaningfully different consequences. The loss rules differ materially between them, and neither framework’s loss answer is automatic: ordinary character alone does not establish deductibility or netting, and wagering losses are limited to wagering gains, with the deduction further limited to 90 percent of losses for tax years beginning after December 31, 2025. The unresolved measurement-unit question adds operational complexity if the wagering rules apply.
What is the difference between the capital and ordinary income frameworks for Polymarket?
Under the capital asset framework, each contract is treated as a property acquisition subject to capital gain and loss mechanics. Long-term positions receive preferential rates. Net capital losses offset other capital gains and up to $3,000 of ordinary income per year. Under the ordinary income framework, gains and losses are ordinary in character, and the loss side depends on the separate allowance and placement rules; ordinary character alone does not establish netting. The rate difference can be significant for profitable traders with longer holding periods. The loss mechanics differ materially between the frameworks and are not automatic under either.
How do I reconstruct my Polymarket transaction history?
Reconstruction begins with Polymarket’s available platform records and supplement them with wallet, bank, and other source records as needed to reconstruct the activity. That data should be cross-referenced against on-chain records using your Polygon wallet address on PolygonScan or an equivalent Polygon network explorer. Crypto tax software with Polygon wallet import can assist with organizing the data, but output must be verified manually because these platforms frequently misclassify prediction market contract transactions. For taxpayers with incomplete records due to lost credentials or extended periods of unreconciled activity, a more formal reconstruction process from on-chain evidence may be required.
What are the consequences of not reporting Polymarket activity?
Unreported prediction market income is subject to the applicable income tax plus interest from the original due date. Civil penalties for substantial understatement of income are 20% of the underpayment. Fraud penalties are 75%. Answering “No” to the Form 1040 digital asset question when Polymarket activity occurred during the year creates an additional false statement exposure independent of the underlying income. Because on-chain Polymarket transactions are traceable through blockchain analytics and centralized exchange records, the “no one will know” assumption does not accurately reflect the enforcement landscape.
How is Polymarket different from Kalshi for tax purposes?
Kalshi operates as a CFTC-designated contract market. Polymarket’s on-chain platform operates without CFTC designation, while Polymarket’s U.S. platform operates through QCX LLC, a CFTC-designated contract market, following its 2025 acquisition. Venue status affects the Section 1256 venue element and the information reporting landscape, but it does not determine contract classification. Both platforms involve the acquisition and disposition of binary event contracts, and the core characterization questions are substantially the same.
This article is provided by Camuso CPA for general informational purposes and does not constitute legal, tax, accounting, or investment advice. Tax laws and regulations are evolving rapidly and the information presented may not reflect current guidance. Reading this article does not create a CPA-client relationship. For advice on your specific situation, schedule a consultation with Camuso CPA.
Camuso CPA, PLLC
