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World Cup winnings and US taxes (2026) — the Sept 15 deadline nobody prices

The 2026 World Cup (June 11 – July 19) is the biggest event-market ever. Winnings land in Q3 — estimated tax is due September 15, 2026. What US traders owe, sourced. Updated 2026-06-11 · TY2026 parameters.

Why this tournament is a tax event

The 2026 World Cup (June 11 – July 19, 2026) is the largest event-market of all time — it headlines our cross-venue dashboards right now. Every settled winner market pays out inside Q3 2026 (June 1 – Aug 31), and estimated tax on those winnings is due September 15, 2026 — months before any filing season. No venue withholds; no comprehensive 1099 is coming (the 1099 question).

What you'll owe depends on characterization

Event-contract P&L has four open characterizations (no IRS guidance as of June 2026). For a tournament punt the practical spread looks like: ordinary income at your marginal rate (most common position) vs. capital treatment (losses capped at $3,000/yr against ordinary income) vs. gambling — where TY2026's OBBBA rule caps deductible losses at min(90% × losses, winnings), so a trader who wins $5,000 on the final but lost $5,000 across the group stage still books $500 of phantom income if itemizing.

Characterization	Position	What it means
§1256 (60/40)	Aggressive / unsettled	60% long-term + 40% short-term capital treatment regardless of holding period, mark-to-market at year end, Form 6781. Argued because Kalshi is a CFTC-designated exchange — but §1256(b)(2)(B) excludes 'swaps,' and the CFTC classifies event contracts as swaps. No IRS guidance, no PLR, no cases as of June 2026.
Capital gain/loss	Moderate / common	Contracts as capital assets under §§1001/1221 → Form 8949/Schedule D; almost always short-term in practice (taxed at ordinary rates). Net capital losses limited to $3,000/yr against ordinary income, with carryforward.
Ordinary income	Conservative / most common	Net profits as other income at ordinary rates (Schedule 1). The position most practitioners default to absent guidance.
Gambling (OBBBA)	Adverse under OBBBA	Winnings as gambling income; losses deductible only if itemizing, capped at min(90% × losses, winnings) — the TY2026 'phantom income' trap. Several states disallow losses entirely.

The state layer

Where you live changes the answer materially: New Jersey nets wins and losses in full (no itemizing); Massachusetts taxes gross winnings under gambling characterization (exchange losses don't count); CT, IL, IN, KS, LA, NC, OH, RI, VT, WI allow no gambling-loss deduction at all; AK/FL/NV/NH/SD/TN/TX/WA/WY have no broad income tax. EventBasis carries all 50 states + DC.

Do this before September 15

Export your fills now — both venues, while the history is easy to pull
Run the four characterizations on your actual numbers (calculator below — it includes a worked World Cup position in the demo data)
Set aside the worst-case figure; the calculator's Q3 line is 90% of worst case, per the safe-harbor logic
No penalty if timely payments ≥ the lesser of 90% of 2026 tax or 100% of 2025 tax (110% if 2025 AGI > $150k).

Run your own numbers — free

EventBasis computes your federal + state liability under all four characterizations side by side, flags the OBBBA phantom-income trap, and turns venue CSV exports into lot-level Form 6781/8949 drafts. Free during early access.

Open the calculator Import your trade CSV

Get the TY2026 filing checklist + updates when guidance moves (it will):

Primary sources

Verification-log discipline: every parameter on this page traces to one of these documents, checked 2026-06-11.

Educational information under stated assumptions, current as of 2026-06-11 — not tax advice. Characterization of event-contract P&L is unsettled (no IRS guidance, no PLR, no cases as of June 2026); engage a qualified professional before filing. Sources and parameters: methodology · primary documents linked below.

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