The key dates for Kalshi and prediction-market traders, the filing deadline and the quarterly estimated-payment dates, with a live countdown to the next one. Bookmark it so you never get surprised.
NEXT KEY DATE
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2025 tax return due
File your 2025 return (or extend). Tax owed is still due today.
April 15, 2026
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Q1 2026 estimated payment
First quarterly estimate for 2026 income.
April 15, 2026
upcoming
Q2 2026 estimated payment
Second quarterly estimate for 2026 income.
June 15, 2026
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Q3 2026 estimated payment
Third quarterly estimate for 2026 income.
September 15, 2026
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2025 extended return due
Final deadline if you filed an extension.
October 15, 2026
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Q4 2026 estimated payment
Final quarterly estimate for 2026 income.
January 15, 2027
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2026 tax return due
File your 2026 return (or extend).
April 15, 2027
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Know what you'll owe before the date
ContractTax tracks your Kalshi P&L year-round and estimates your tax under each treatment, so the deadline isn't a surprise.
The 2025 federal return is due April 15, 2026. You can extend the filing deadline to October 15, 2026, but any tax owed is still due in April.
Do Kalshi traders owe quarterly estimated taxes?
If you expect to owe enough and aren't covered by withholding, yes. The 2026 quarterly estimate dates are April 15, June 15, and September 15, 2026, and January 15, 2027.
What happens if I miss a quarterly payment?
You may owe an underpayment penalty and interest. Paying the safe-harbor amount each quarter generally avoids it.
Dates are standard federal deadlines and can shift for weekends and holidays. This is educational, not tax advice. Confirm current dates and your situation with the IRS or a professional.
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