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Polymarket Taxes (TY2026) — no forms, a USDC layer, and the same four characterizations

Polymarket issues no US tax forms, and settling in USDC adds a digital-asset layer most traders miss. The TY2026 treatment, sourced and dated. Updated 2026-06-11 · TY2026 parameters.

What Polymarket sends you

Polymarket issues no US tax forms; USDC settlement adds a property-disposition layer (digital-asset question on Form 1040 must be answered Yes).

Nothing arrives in January. That does not mean nothing is owed — it means you are the recordkeeper. Export your activity, build lots, and keep the export (the venue's history endpoints are not an archive you control).

The USDC layer

Polymarket positions settle in USDC — property, not dollars, in the IRS's eyes. Acquiring and disposing of USDC around trades creates a second, usually small, disposition layer on top of your market P&L, and it means the digital-asset question on Form 1040 must be answered "Yes". A stablecoin's gain/loss per disposition is typically near zero, but the checkbox and the recordkeeping obligation are not optional.

Characterization: same four positions

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.

Note the §1256 argument is weaker for Polymarket than Kalshi (it isn't a CFTC-designated contract market for US retail purposes), which pushes most practitioners toward ordinary income or capital treatment here.

OBBBA + states + estimates

Under gambling characterization, TY2026's 90% loss cap applies — min(90% × losses, winnings), itemizing required: break-even years generate phantom income. State treatment ranges from full netting (NJ, PA) to gross-winnings taxation (MA) to no loss deduction at all (CT, IL, IN, KS, LA, NC, OH, RI, VT, WI). Profitable traders owe quarterly estimates; Q3 is due September 15, 2026.

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.

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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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