Event Contract Tax Treatment: 3 Classifications

The IRS has not published specific guidance on event contract tax treatment. That silence creates real confusion and real opportunity. Depending on how your contracts are classified, the same $10,000 in profit could cost you anywhere from $2,400 to $3,700 in federal tax.

Three possible classifications exist. Which one applies depends on the platform you trade, the regulator involved, and arguments your tax professional is willing to make. This article breaks down all three, shows the math, and explains which platforms likely fall into which bucket.

This is the technical deep-dive in our prediction market tax guide. For platform-specific filing instructions, see the Kalshi 1099 guide and Polymarket tax reporting walkthrough.

The 3 Tax Classifications for Event Contracts

Every event contract trade you make falls into one of three buckets for tax purposes. The differences are not academic. They determine your rate, your loss treatment, and your filing requirements.

1. Section 1256: Regulated Futures Contracts

Most tax professionals interpret Section 1256 as applying to contracts traded on a CFTC-regulated designated contract market (DCM). Under this classification, gains are split 60% long-term and 40% short-term, regardless of how long you held the position. Even if you bought and sold the same day.

At the top bracket, long-term capital gains are taxed at 20%. Short-term at 37%. The blended rate under Section 1256 comes to 26.8%. That is a significant discount.

Section 1256 also requires mark-to-market accounting on December 31. Open positions are treated as if sold at fair market value on the last day of the year. You realize gains or losses whether you close the trade or not.

The strongest Section 1256 argument applies to Kalshi, which operates as a CFTC-regulated DCM. If your event contracts function like regulated futures, the 60/40 split is the most defensible position.

2. Short-Term Capital Gains (Property Treatment)

If event contracts are classified as property or capital assets rather than regulated futures, standard capital gains rules apply. Since most event contracts resolve within weeks or months, the holding period is almost always under one year. That means short-term capital gains, taxed at your ordinary income rate.

The upside of property treatment: net gains and losses follow normal capital gains rules. You report the net. Losses offset gains dollar for dollar. If your losses exceed your gains, you can deduct up to $3,000 per year against ordinary income and carry the rest forward.

This is likely the most conservative position for platforms without clear CFTC regulation.

3. Gambling Income

The worst outcome. If the IRS classifies your event contract activity as gambling income, you report all winnings on Schedule 1 as "other income." Losses are only deductible if you itemize, and only to the extent of your winnings. You cannot create a net gambling loss.

2026 update: the 90% cap. The One Big Beautiful Bill Act added a new limitation starting January 1, 2026. Gambling losses are now only deductible up to 90% of your losses, not 100%. This creates "phantom income." If you won $10,000 and lost $10,000, you can only deduct $9,000 of losses, leaving $1,000 taxable at your ordinary income rate, even though you broke even. This makes gambling classification even more punishing than before.

Under capital gains or Section 1256 treatment, this 90% cap does not apply. Losses offset gains dollar for dollar. This is one more reason why the classification question matters so much for prediction market traders.

This classification is most likely for activity on unregulated platforms or for contracts the IRS views as wagers rather than financial instruments. It is the position you want to avoid.

Which Platforms Fall Under Which Classification

The platform you trade on is the single biggest factor in determining your tax treatment. Regulation status drives the analysis.

Platforms routing through Kalshi's DCM infrastructure inherit the Section 1256 argument. Robinhood and Coinbase event contracts are Kalshi contracts under the hood, so the same logic applies.

Polymarket is the outlier. It operates globally without CFTC oversight. The classification depends on whether the IRS views crypto-settled prediction market positions as capital assets or gambling. For detailed reporting guidance, see the Polymarket tax reporting guide.

PredictIt has a CFTC no-action letter but is not a DCM. The Section 1256 argument is weaker but not unreasonable.

The Dollar Difference: A Worked Example

A trader in the 32% federal bracket earns $10,000 in event contract profits. Here is the actual tax bill under each classification.

Section 1256 (60/40 split):

• 60% long-term: $6,000 at 15% = $900
• 40% short-term: $4,000 at 32% = $1,280
• Total tax: $2,180

Short-term capital gains:

• 100% at 32% = $3,200
• Total tax: $3,200

Gambling income:

• 100% at 32% = $3,200
• Total tax: $3,200 (assuming no offsetting losses)

The Section 1256 classification saves $1,020 on $10,000 in gains. Scale that to a $50,000 year and the difference is $5,100. Use the PM EV calculator to model expected gains, then apply these rates to estimate your after-tax edge.

The gap widens at higher brackets. At the 37% rate, the Section 1256 blended rate is 26.8% versus 37% for the other classifications. That is a 10.2 percentage point spread.

The Gambling Classification Trap

The gambling classification does not just change your rate. It fundamentally changes how losses work. This is where real money gets destroyed.

Consider a trader with $15,000 in winning trades and $12,000 in losing trades across the year.

Under capital gains treatment:

• Net gain: $15,000 - $12,000 = $3,000
• Tax at 32%: $960

Under gambling treatment (itemizing):

• Report $15,000 as gambling income on Schedule 1
• Deduct $12,000 as gambling losses on Schedule A (only if itemizing)
• Net taxable: $3,000
• Tax at 32%: $960

Under gambling treatment (standard deduction):

• Report $15,000 as gambling income
• Cannot deduct losses (standard deduction is more valuable than itemizing)
• Tax at 32%: $4,800

The difference between $960 and $4,800 is devastating. Most taxpayers take the standard deduction. If you are classified as a gambler and you take the standard deduction, you pay tax on gross winnings, not net profit. Account for fees too. The fee calculator shows how platform costs eat into your net before taxes take another bite.

This is the trap. Your actual profit after losses might be $3,000, but your tax bill could be based on $15,000.

Section 1256 Mark-to-Market: Year-End Positions

Section 1256 contracts use mark-to-market on December 31. If you hold open positions at year end, you must treat them as sold at fair market value, even if you have not closed the trade.

Worked example:

On November 15, you buy 200 "yes" contracts on Kalshi at $0.35 each. Total cost: $70. On December 31, the contract trades at $0.60.

• Unrealized gain: (200 x $0.60) - $70 = $50
• You report $50 in gain for the tax year
• Your new cost basis on January 1 becomes $0.60 per contract

If the contract later resolves at $1.00, your gain in the new year is (200 x $1.00) - (200 x $0.60) = $80, not $130. The year-end adjustment prevents double counting.

This matters for active traders who hold positions across the calendar boundary. You owe tax on gains you have not yet realized in cash. Plan your liquidity accordingly.

The Section 1256 Loss Carryback Advantage

Section 1256 has a unique feature that capital gains and gambling income lack: three-year loss carryback.

Standard capital losses only carry forward. If you lose $20,000 this year, you deduct $3,000 against ordinary income and carry $17,000 forward to future years.

Section 1256 losses can be carried back three years and applied against Section 1256 gains in those prior years. You file amended returns and get refunds for taxes already paid. For traders in volatile markets like prediction markets, this is a meaningful safety net.

A trader who earned $30,000 in Section 1256 gains in 2025 and lost $25,000 in 2026 could carry back the 2026 loss to offset 2025 gains and receive a tax refund. With standard capital gains treatment, that loss just rolls forward. This flexibility is one reason the event contract versus options comparison matters for tax planning.

Worked Example: Each Classification Applied to One Year of Trading

A trader on Kalshi places 200 trades during 2026. She finishes with $18,000 in winning trades and $11,000 in losing trades. She is in the 32% federal bracket and takes the standard deduction.

Section 1256 (60/40 split):

• Net gain: $7,000
• 60% long-term ($4,200) at 15% = $630
• 40% short-term ($2,800) at 32% = $896
• Federal tax: $1,526

Short-term capital gains:

• Net gain: $7,000
• 100% at 32% = $2,240

Gambling (standard deduction, post-One Big Beautiful Bill Act):

• Gross winnings reported: $18,000
• Deductible losses: $0 (standard deduction more valuable than itemizing)
• Taxable: $18,000
• Federal tax at 32%: $5,760

Gambling (itemizing, post-90% cap):

• Gross winnings: $18,000
• Allowable loss deduction: 90% x $11,000 = $9,900
• Taxable: $8,100
• Federal tax at 32%: $2,592

The spread between the best case (Section 1256 at $1,526) and worst case (gambling with standard deduction at $5,760) is $4,234 on a $7,000 net profit. That is 60% of your actual gains going to an avoidable tax bill. Run your expected annual profit through the PM EV calculator and apply these rates to see the real after-tax edge for your situation.

What We Actually Know (And What We Don't)

The honest reality: this entire framework is built on analogy and inference, not direct IRS guidance.

What is established:

• Section 1256 applies to regulated futures on a DCM
• Kalshi is a CFTC-regulated DCM
• Therefore, the Section 1256 argument for Kalshi contracts is strong
• The One Big Beautiful Bill Act (2026) introduced the 90% gambling loss deduction cap

What is developing:

• CFTC has expanded event contract approvals through 2025-2026, signaling these are financial instruments, not wagers
• Multiple tax software providers (TurboTax, H&R Block) now include event contract prompts, categorizing DCM contracts under Section 1256 by default
• Several tax professionals have published guidance treating Kalshi and CME-routed contracts as Section 1256 eligible

What is not established:

• Whether the IRS agrees that event contracts are "regulated futures contracts" under Section 1256
• How the IRS views prediction market activity on unregulated platforms
• Whether Polymarket trades are capital transactions or gambling
• Whether the new 90% gambling loss cap will prompt the IRS to clarify event contract classification

The CFTC regulates these contracts. The IRS has not weighed in. Until it does, every position involves some interpretive risk.

For small portfolios under $1,000 in annual gains, the classification difference is modest. For portfolios generating $10,000 or more, the difference between Section 1256 and gambling treatment could be thousands of dollars. A tax professional who understands derivatives is not optional at that scale. Factor tax impact into your prediction market strategy and bankroll management from the start.