Filing
What Is Form 8275, and Do Prediction Market Traders Need It?
Form 8275 discloses a tax position and can protect you from parts of a penalty. When it comes up for event contracts, what it covers and how to fill it out.
The WagerMints Team
Prediction-market tax research
October 18, 2026/4 min read
Form 8275 tells the IRS about a position on your return, and it can protect you from parts of a penalty. Prediction market traders mostly hear about it for Section 1256, because the IRS hasn’t said whether event contracts qualify. It’s optional, it needs a reasonable basis to work, and it doesn’t make the position correct.
What does the form do?
The IRS instructions say the form is filed to avoid the parts of the accuracy-related penalty due to disregard of rules or to a substantial understatement of income tax, if the return position has a reasonable basis. Preparers can also use it for their own penalty exposure.
It can’t remove every penalty. The instructions say disclosure doesn’t avoid penalties for:
- Negligence.
- Disregard of regulations.
- A substantial understatement on a tax shelter item.
- A claim of tax benefits from a transaction lacking economic substance.
The tax and interest stay owed if the IRS disagrees. The form only affects those penalties.
When does it come up for prediction markets?
- Section 1256. Camuso and Mukherjee conclude it isn’t available for event contracts, and warn that preparers claiming it without documented analysis and a Form 8275 disclosure take on risk. White & Case argues for it. Both sides.
- A carryback. The instructions say carryback items are disclosed for the year they originate, so you don’t file another form for the carryback year. How the carryback works.
- Preparers. A preparer can owe a penalty for a position without substantial authority, unless it’s disclosed and has a reasonable basis. So yours may ask for this form. Why a preparer might say no.
How do you fill it out?
Part I is a table for the guidance you rely on, the item, a description, and the form, line and amount. Part II is where you explain. The instructions say it must include the relevant facts and information that can reasonably be expected to tell the IRS the identity of the item, its amount, and the nature of the controversy or potential controversy. Attaching other documents in place of this doesn’t count as disclosure.
Your disclosure generally needs to cover:
- The exchange and the contracts, and that the exchange is CFTC-regulated.
- The amount reported, and the form and line it’s on.
- That no IRS guidance addresses event contracts, and the legal question: whether they’re Section 1256 contracts.
- How you handled open positions at year-end.
“Taxpayer traded event contracts on KalshiEX LLC, a CFTC-designated contract market, and reported a net gain of $[amount] on Form 6781, Part I, line 1, treating the contracts as Section 1256 contracts. Positions open at year-end were marked at their last business day value. The IRS has issued no guidance on event contracts, and whether they are regulated futures contracts or are excluded as swaps under Section 1256(b)(2)(B) is unsettled.”
Have your preparer rewrite this for your facts. It must be accurate for your return.
How and when do you file it?
- File it with your original return and keep a copy. You may be able to file it with an amended return.
- Check your software before you commit. Old TurboTax community threads say it isn’t supported there. Software steps.
- For a recurring item, ask your preparer whether you need a new form each year.
Should you file one?
That’s a question for a preparer, and it matters most with a large Section 1256 position. It gives up some privacy about your position in return for some protection from penalties. Before you decide, compare all four methods on your trades. If the gap between Section 1256 and capital gains is small, the position may not be worth taking.
Questions about Form 8275
Do I need Form 8275 for Kalshi trades?
No rule requires it for event contracts. It is a choice that can protect you from parts of the accuracy-related penalty if your position has a reasonable basis. One published analysis warns of it for Section 1256, so raise it with a preparer if you use that method.
What does Form 8275 protect against?
The parts of the accuracy-related penalty for disregard of rules or a substantial understatement of income tax, if the position has a reasonable basis. It can't protect against negligence, disregard of regulations or several other penalties the instructions list.
When do I file Form 8275?
With your original return. The instructions say you may be able to file it with an amended return, and point to the regulations for when that works.
Does filing Form 8275 trigger an audit?
We have no source that says either way. It does tell the IRS about your position and the amount, so go in assuming it will be read.
Should I use Form 8275 or Form 8275-R?
Use Form 8275-R if your position is contrary to a regulation. Form 8275 is for other positions. No regulation addresses event contracts today, but ask your preparer to confirm for your return.
General information about US federal tax, not tax advice.
Sources
- IRS, Instructions for Form 8275 (Rev. October 2024)
- IRS Form 8275
- Camuso CPA, Section 1256 and prediction markets
- White & Case, tax implications of predictions markets transactions (Mar 2026)
- Tax Law Center at NYU Law, "Are Sports Event Contracts on Prediction Markets Gambling for Federal Tax Purposes?", Tax Notes Federal, Oct 5, 2026
Run this against your own trades
WagerMints computes all four methods from your real Kalshi export or Polymarket wallet, side by side. Your trade data is processed in memory, not stored unless you opt in to share it.
Run your reportFull guides: Kalshi taxes, Polymarket taxes, the four methods and the tax glossary. Or try the free prediction market tax calculator.
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