What Happens If the IRS Recharacterizes Your Prediction Market Gains and Losses?

Last Updated on July 19, 2026 by Patrick Camuso, CPA

Quick answer (read this first):

What this article addresses: What happens when a prediction market tax position filed in a prior year gets challenged or recharacterized, including Section 1256 treatment. This article is for participants who already filed, are now uncertain about their position, and want to know what happens if the IRS recharacterizes prediction market gains and losses.

What is unsettled: No published IRS guidance directly addresses the federal income-tax characterization of prediction-market contracts. That cuts both ways. A filed position may remain supportable, but the absence of direct guidance does not itself establish that any position is correct or protected.

Why Recharacterization Risk Is Real Now

A participant who filed a 2024 or 2025 return necessarily did so without published IRS guidance directly addressing prediction-market characterization and without a settled analytical framework. That was unavoidable. The positions that were filed, whether Section 1256, capital asset treatment, or ordinary income, rested on interpretations of existing law applied to a novel instrument class.

A filed return remains subject to examination for the applicable limitations period, and future guidance or enforcement developments may affect practical risk. This article does not predict examination likelihood; it explains what a recharacterization can change if one occurs.

But the law does not stop applying while an area remains unsettled. A participant who filed an uncertain position sits with that position on the return for the general three-year assessment period, or six years where the statutory gross-income-omission threshold is met. If future guidance disfavors the filed position, the practical risk profile may change. That is the exposure this article addresses.

For a detailed breakdown of how prediction market income may be characterized and which facts affect the framework for each contract type, see our prediction market tax guide.

The Most Common Aggressive Positions Filed

Section 1256 Treatment

Section 1256 treatment produces a 60 percent long-term / 40 percent short-term capital gain split regardless of actual holding period. Section 1256 may permit an election to carry a net Section 1256 contracts loss back to prior years, subject to the limitations of Section 1212(c).

The threshold question is statutory. Section 1256 applies only to defined contract categories: regulated futures contracts, foreign currency contracts, non-equity options, dealer equity options, and dealer securities futures contracts. A regulated futures contract must satisfy the applicable Section 1256(g)(1) requirements, including that the amount required to be deposited and the amount that may be withdrawn depend on a system of marking to market, and the contract must be traded on or subject to the rules of a qualified board or exchange; venue qualification and contract qualification are separate questions. Whether prediction-market event contracts satisfy the regulated futures contract definition is unresolved, the non-equity option question is also unresolved, and no published IRS guidance directly addresses either question.

Whether a particular prediction-market contract qualifies under Section 1256 remains unresolved, and a taxpayer claiming that treatment must support the specific statutory route relied upon. If the IRS recharacterizes the position, the gains convert from the 60/40 split to either short-term capital gains or ordinary income, depending on the alternative treatment ultimately applied.

Capital Asset Treatment on Sports Contracts

Sports-event contracts raise wagering-characterization questions, but no category is automatically within or outside Section 165(d). The underlying event, the venue, the contract terms, and the regulatory posture may be relevant facts, but they do not create a federal tax hierarchy among contract categories. A participant who filed capital asset treatment, with or without a Form 8275 disclosure, took the position that the contracts fall outside the wagering framework; that argument is analytically available but contested.

If the IRS recharacterizes sports-contract gains from capital treatment to wagering treatment, the consequences depend on the tax year, the properly measured wagering gains and losses, their placement, and the taxpayer’s capacity. In a net gain year, the rate impact may be significant; the loss-side consequences are described year by year below.

Capital or Ordinary Treatment Without Adequate Disclosure

A participant who reported prediction market gains under a capital or ordinary framework without adequately disclosing the position may have taken a substantively supportable position, depending on the contract and facts, but may not receive the potential penalty-related benefit of adequate disclosure. Adequate disclosure on Form 8275 may be relevant to the substantial-understatement rules when the position has at least reasonable basis; without adequate disclosure, that potential relevance may be unavailable, and whether any penalty applies depends on the applicable authority, disclosure, reasonable-cause, good-faith, and procedural rules.

What IRS Recharacterization May Produce

An IRS recharacterization can affect several separate questions, including recognition, character, deduction allowance, placement, limitation, measurement, and reporting. A change in character does not by itself determine whether a loss is deductible, when it is recognized, or how separate positions may be measured or combined. The rate impact gets the attention, but for many participants the loss deduction question is what creates the actual tax bill. The three scenarios below are ordered by severity of the loss impact.

If resolution is not treated as a sale or exchange

If contract resolution is not treated as a sale or exchange, gain or loss must be analyzed separately under the applicable recognition, character, allowance, placement, and limitation rules. Automatic contractual resolution should not generically be characterized as an extinguishment, sale, option lapse, Section 1234A termination, abandonment, or worthlessness event. 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).

Capital asset treatment recharacterized to wagering

The consequences differ by tax year, and this distinction matters. For tax years beginning before January 1, 2026, the post-2025 90 percent rule does not apply. In those years, otherwise allowable wagering losses are deductible against wagering gains without the 90 percent reduction, and the consequences of a recharacterization depend on the properly measured wagering gains and losses, their placement, the taxpayer’s capacity, and the other applicable rules; a recharacterization can still change rates, placement, and reporting.

For tax years beginning after December 31, 2025, the deduction equals 90 percent of wagering losses and may not exceed wagering gains. Where measured wagering gains equal measured wagering losses under the taxpayer’s adopted, supportable methodology, and the losses are otherwise allowable to the taxpayer in the relevant capacity, the maximum deduction is 90 percent of the measured losses, which can leave taxable wagering income despite an economic break-even. That consideration applies to tax years beginning after December 31, 2025, not to earlier years.

Section 1256 recharacterized to ordinary income or short-term capital gains

The long-term portion of the Section 1256 gain loses its preferential 60/40 treatment. Depending on the alternative characterization ultimately applied, the affected gain may be treated as short-term capital gain or ordinary income. Section 1256 loss carrybacks that were applied to prior years become unavailable, which may require amendments to the carryback years and create additional tax liability in those years.

Penalty Exposure Under Section 6662

Section 6662 can impose a 20 percent accuracy-related penalty on the portion of an underpayment attributable to a covered ground, including a substantial understatement of income tax, subject to the applicable authority, disclosure, reasonable-cause, good-faith, and procedural rules. For an individual, a substantial understatement exists when the understatement exceeds the greater of 10 percent of the tax required to be shown on the return or $5,000. Whether a recharacterization produces an understatement that meets this threshold depends on the amounts and the return.

The penalty is not automatic. The substantial-understatement computation excludes items for which there was substantial authority and, where the position has at least a reasonable basis, items adequately disclosed; and no penalty applies to any portion for which there was reasonable cause and good faith under Section 6664. Each of those determinations is facts-specific.

Substantial authority exists where the weight of the authorities supporting the position is substantial in relation to the weight of the authorities in opposition. Because no published IRS guidance directly addresses the federal income-tax characterization of prediction-market contracts, these determinations proceed from the generally applicable authorities. Whether a particular position satisfies reasonable basis, substantial authority, or another reporting standard depends on the exact position, authorities, facts, disclosures, and return.

Reasonable basis is a relatively high reporting standard that is significantly higher than not frivolous and lower than substantial authority. Adequate disclosure on Form 8275 may be relevant to the substantial-understatement rules when the position has at least reasonable basis; disclosure does not guarantee penalty protection and does not cure the underlying tax treatment.

Form 8275 is generally used to disclose a position that is not otherwise adequately disclosed on the return. Other prescribed disclosure methods may apply in limited circumstances. The form requires identifying the item, the relevant Code section, and the legal basis for the position. It does not establish that the underlying position is correct and does not eliminate every potential penalty issue.

Whether any penalty applies to a particular filed position, disclosed or undisclosed, depends on the applicable authority, disclosure, reasonable-cause, good-faith, and procedural rules, and requires taxpayer-specific analysis. The possibility of a Section 6664 reasonable-cause and good-faith defense remains available where applicable.

What to Do About an Uncertain Filed Position

The decision whether to amend, make a post-filing disclosure, defend the filed position, or take no immediate action depends on the substantive tax analysis, procedural posture, timing, amount at issue, available records, disclosure history, and potential consequences.

Assess the Position Honestly

The first step is an honest assessment of where the filed position actually sits on the defensibility spectrum. The current substantive exposure should be evaluated under the authorities and facts presently available. Any penalty analysis must also consider the authorities, disclosures, advice, records, and good-faith basis existing when the return was filed.

For Section 1256 positions on Kalshi contracts, the qualification question remains unresolved, and a taxpayer claiming that treatment must support the specific statutory route relied upon. For capital asset positions on sports contracts, the wagering-characterization question is contested. Whether a particular position satisfies reasonable basis, substantial authority, or another reporting standard depends on the exact position, authorities, facts, disclosures, and return.

The Amended Return Decision

Amending a prior year return is not always the right answer, even where the filed position is now viewed as higher-risk.

There is no general rule that amending or holding is the stronger course. Penalty exposure may exist based on the return position and applicable standards, and interest on any underpayment generally accrues from the applicable payment due date. A taxpayer considering a post-filing disclosure may need to file Form 8275 with a qualified amended return, if the qualified-amended-return requirements remain satisfied; whether that route remains available depends on the timing, procedural requirements, and taxpayer-specific facts.

An amended return may be reviewed, and additional IRS guidance may be issued; depending on what any guidance says, a filed position could be affected in either direction. None of these considerations produces a general rule. The choice among amending, disclosing, defending, or waiting requires taxpayer-specific analysis of the substantive issue, procedural posture, tax effect, available records, disclosure history, and potential consequences.

Where Form 8275 was filed, the disclosure and the support for the position are part of that analysis, but they do not by themselves determine the outcome.

Consider a Formal Opinion Memo

For participants with material potential exposure, a written analysis prepared now can document the present assessment, identify the authorities and factual assumptions, and guide the taxpayer’s next steps. It does not retroactively establish what the taxpayer knew or relied upon when the original return was filed. Whether any analysis supports a penalty defense, including a Section 6664 reasonable-cause and good-faith defense, depends on the applicable rules and taxpayer-specific circumstances. A taxpayer who cannot produce documented reasoning for a position will have a harder time demonstrating the basis for it than one who can.

Statute of Limitations Considerations

The general assessment period is three years from the later of the return due date or the actual filing date, assuming a filed, non-fraudulent return and no statutory exception. For a 2024 return filed April 15, 2025, that general period runs through April 15, 2028.

Two exceptions can extend or eliminate the period. First, under Section 6501(e), the assessment period extends to six years where the return omits from gross income an amount exceeding 25 percent of the gross income stated in the return, subject to the statutory computation and adequate-disclosure rules. The six-year rule can apply when that statutory gross-income-omission threshold is met. Whether a prediction-market recharacterization creates such an omission depends on how gross income was reported and computed and requires taxpayer-specific analysis.

Second, there is no assessment period where a false or fraudulent return is filed with intent to evade tax, and the civil fraud penalty is 75 percent of the portion of the underpayment attributable to fraud. An incorrect or aggressive characterization is not, by itself, fraud. Fraud requires the requisite intent to evade tax and depends on the full facts.

The limitations period is the taxpayer’s friend only where the IRS does not act within it. Where the IRS does examine and proposes adjustments within the limitations period, the fact that the period was running provides no protection against the proposed adjustments or the associated penalties.

For the framework that governs which characterization may apply to your specific prediction market contracts, see our prediction market tax guide.

For an analysis of whether prediction market profits are gambling income and how that determination is made, see our article Are Prediction Market Profits Gambling Income?

For the loss deduction framework and how characterization affects what losses can be deducted, see our prediction market loss deductions analysis.

For Section 1256 treatment and the arguments for and against its application to prediction market contracts, see our article Section 1256 and Prediction Markets.

For professional assistance reviewing a prior year filing position or evaluating whether an amended return is appropriate, our prediction market tax reporting services are available.

Frequently Asked Questions

I filed Section 1256 treatment on my Kalshi gains. What is my risk?

The Section 1256 qualification question for Kalshi binary contracts is unresolved. Whether the contracts satisfy the regulated futures contract definition, including the Section 1256(g)(1) requirement that the amounts required to be deposited and permitted to be withdrawn depend on a system of marking to market, is unresolved, and the non-equity option question is also unresolved. A taxpayer claiming Section 1256 treatment must support the specific statutory route relied upon. If the IRS recharacterizes, gains convert from the 60/40 split to short-term capital gains or ordinary income, and prior-year loss carrybacks may be affected. Section 6662 can impose a 20 percent accuracy-related penalty on the portion of an underpayment attributable to a covered ground, including a substantial understatement, subject to the applicable authority, disclosure, reasonable-cause, good-faith, and procedural rules. A professional evaluation of the position and the amended return decision is warranted for any material exposure.

What is the statute of limitations for IRS examination of my prediction market returns?

Three years from the later of the return due date or filing date in the general case, assuming a filed, non-fraudulent return and no statutory exception. Under Section 6501(e), the period extends to six years where the return omits from gross income an amount exceeding the statutory 25 percent threshold; whether a recharacterization creates such an omission depends on how gross income was reported and computed and requires taxpayer-specific analysis. There is no assessment period for a false or fraudulent return filed with intent to evade tax, but an incorrect or aggressive characterization is not, by itself, fraud.

If the IRS audits my return, can my position still be sustained?

Possibly. Sustainability under examination depends on the exact position, the authorities, the facts, the records, the disclosures, and the procedural posture. No published IRS guidance directly addresses the federal income-tax characterization of prediction-market contracts, so the analysis proceeds from the generally applicable authorities on each side. The strength of the underlying legal analysis, the quality of the documentation, and the specific facts of the participant’s activity all bear on the outcome.

Should I wait for IRS guidance before deciding whether to amend?

There is no general rule. The decision whether to amend, make a post-filing disclosure, defend the filed position, or take no immediate action depends on the substantive tax analysis, procedural posture, timing, amount at issue, available records, disclosure history, and potential consequences. Interest on any underpayment generally accrues from the applicable payment due date, and the assessment period runs regardless of whether guidance is issued. A professional review of the specific position is the right first step before making the amend-or-wait decision.

The analysis in this article is unsettled law applied to prior year filings; no published IRS guidance directly addresses the characterization question. No position in this article constitutes legal or tax advice. The appropriate course of action for any specific taxpayer depends on the facts of their return, the characterization position filed, the presence or absence of Form 8275 disclosure, and the size of the potential exposure. Professional analysis is required before any amended return decision is made.

For a full analytical framework covering prediction market tax characterization across all platforms and contract types, see our Prediction Market Tax Guide. For professional assistance reviewing a prior year filing position, our prediction market tax reporting services are available.