Reporting Kalshi Losses: When and Why You Should

You generally only need to report Kalshi losses if you want to claim them as a deduction against capital gains. While Kalshi reports your gains to the IRS on Form 1099-MISC, reporting losses is optional but beneficial for tax purposes, allowing you to offset taxable income.

Understanding Prediction Market Taxation

Prediction markets like Kalshi are treated by the IRS as 'specified gambling winnings' or 'notional principal contracts,' depending on their specific structure and how they are classified by the platform. For most retail users, gains from prediction markets are typically considered taxable income. Kalshi, as a regulated exchange, is required to issue a Form 1099-MISC to users who have net gains exceeding a certain threshold, usually $600 in a calendar year.

This 1099-MISC will report your gross winnings, not your net profit or loss. This is a crucial distinction. The IRS receives this information, and if you have significant gains, they will expect to see them reported on your tax return. However, the 1099-MISC itself doesn't account for your losses, which is where your proactive reporting comes in.

Why Report Your Kalshi Losses?

Reporting your losses is not mandatory in the same way reporting gains is, but it's highly advisable for tax efficiency. Here's why:

• Offsetting Gains: Your primary motivation for reporting losses is to offset your taxable gains. For most individual taxpayers, prediction market losses can be deducted up to the amount of your prediction market winnings. This means if you won $1,000 and lost $700, you would only pay tax on the net $300.
• Reducing Taxable Income: By reducing your net gains, you reduce your overall taxable income, potentially leading to a lower tax bill.
• Accurate Tax Picture: Reporting both gains and losses provides a more accurate representation of your trading activity to the IRS.

It's important to keep meticulous records of all your trades, including dates, amounts wagered, outcomes, and net profit or loss for each contract. This documentation will be essential if you ever need to substantiate your reported losses.

How to Report Kalshi Losses

The method for reporting losses depends on how your gains are classified and whether you itemize deductions.

For Casual Traders (Non-Professional)

If your prediction market activity is not considered a trade or business, your gains are typically reported as 'Other Income' on Schedule 1 (Form 1040), line 8. Your losses, in this scenario, are generally deductible as an itemized deduction on Schedule A (Form 1040), line 16, up to the amount of your winnings. This means you must itemize your deductions rather than taking the standard deduction to claim these losses.

Steps:

1. Receive Form 1099-MISC: Kalshi will send you this form if your net gains exceed the reporting threshold.
2. Report Winnings: Enter the amount from your 1099-MISC as 'Other Income' on Schedule 1.
3. Track Losses: Keep detailed records of all your losing trades throughout the year.
4. Itemize Deductions: If your total itemized deductions (including your prediction market losses) exceed the standard deduction for your filing status, you can choose to itemize.
5. Report Losses on Schedule A: Deduct your total Kalshi losses (up to the amount of your winnings) on Schedule A, line 16, 'Gambling Losses.'

For Professional Traders

If your prediction market activity rises to the level of a trade or business, the tax treatment becomes more complex. Professional traders may be able to deduct losses beyond their winnings and may treat their activity as a business for tax purposes, potentially subject to self-employment taxes. However, qualifying as a 'professional trader' for tax purposes has very strict IRS criteria and is not common for most prediction market participants. Consult a tax professional if you believe this applies to you.

Important Caveats and Considerations

• Not Financial Advice: This information is for educational purposes only and does not constitute financial or tax advice. Always consult with a qualified tax professional regarding your specific situation.
• Record Keeping is Key: Maintain meticulous records of all your trades, including transaction IDs, dates, amounts, and outcomes. This is your primary defense if the IRS ever questions your deductions.
• State Taxes: Remember that state tax laws may differ from federal laws. Check your state's specific rules regarding gambling or prediction market winnings and losses.
• Arbitrage Opportunities: For those actively trading across prediction markets, tracking gains and losses becomes even more critical. Platforms like StartupHub.ai provide tools to identify arbitrage opportunities across venues like Kalshi, Polymarket, and PredictIt. While these tools help you find profitable trades, you are still responsible for consolidating your tax information from each platform.

Using StartupHub.ai for Better Trading

While we don't provide tax advice, StartupHub.ai offers a free cross-venue arbitrage engine that helps you identify profitable opportunities across Kalshi, Polymarket, and PredictIt. Our live board and free JSON API / MCP tool allow you to see when a YES + NO combination costs under $1, signaling a potential arbitrage. This can help you make more informed trading decisions, but remember to track all your trades for accurate tax reporting. You can see live opportunities updated in real-time on the board below this article.

In summary, while Kalshi reports your gains, it's up to you to report your losses if you want to claim them as a deduction. This proactive step can significantly impact your tax liability, making good record-keeping and understanding the tax rules essential for any prediction market participant.

See live opportunities and the free API

StartupHub.ai tracks the same event across Polymarket, Kalshi/Robinhood and PredictIt and flags arbitrage the moment a YES plus NO combination drops under $1. Every match is also a free JSON API and an MCP tool for trading agents.

curl https://www.startuphub.ai/api/v1/arbitrage?arbs_only=1

Focused guides: Polymarket arbitrage, Kalshi arbitrage, and the arbitrage bot API.

Arbitrage API reference. Informational only, not financial advice.