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Taxes by stateCourt order limits Kalshi

Washington gambling winnings tax and Kalshi legal status

Washington has no personal income tax, so the state doesn't tax your gambling winnings or short-term prediction market gains. You still owe federal tax.

As of October 27, 2026, a Washington state judge has ordered Kalshi to stop offering wagers on sports, elections, politics, entertainment, culture, tech and science, and mentions to people in Washington, with a multi-source geofence required by September 2. Where it stands

Checked October 27, 2026 against Washington’s tax department, court dockets and regulator records.

Washington at a glance

Income tax
None
Gambling losses
No state income tax
2026 federal 90% rule
No state income tax
Prediction markets
Court order limits Kalshi

Income tax

How does Washington tax gambling and prediction market winnings?

Washington has no personal income tax on wages, gambling winnings or short-term trading gains.

Washington's capital gains excise tax applies to long-term gains.

Timeline · 6 steps

Every step in Washington, in order

6 steps since Mar 27, 2026, oldest first. Each links the filing, order or page it comes from.

  1. Mar 27, 2026

    Attorney general · Washington Attorney General · State of Washington v. KalshiEX LLC (King County Superior Court)

    Attorney General Nick Brown sued Kalshi in state court under the state Gambling Act and Consumer Protection Act, asking the court to stop the activity, recover money lost by Washingtonians and assess penalties.

    Washington AG press release, Mar. 27, 2026

  2. Mar 30, 2026

    Court · U.S. District Court for the Western District of Washington · Robinhood Derivatives LLC v. Griffin (No. 3:26-cv-05311)

    Robinhood Derivatives sued the director of the state Gambling Commission, asking a federal judge to bar enforcement of state gambling law against its event contracts.

    CourtListener docket, Robinhood Derivatives v. Griffin

  3. May 5, 2026

    Court · U.S. District Court for the Western District of Washington · State of Washington v. KalshiEX LLC (No. 2:26-cv-01062)

    After Kalshi moved the state's suit to federal court, a federal judge sent it back to King County Superior Court. Kalshi appealed, and on May 21 the Ninth Circuit denied its request to pause the remand.

    CourtListener docket, State of Washington v. KalshiEX LLC

  4. Jul 21, 2026

    Attorney general · Washington Attorney General · State of Washington v. KalshiEX LLC (King County Superior Court)

    The attorney general announced that the state judge granted a preliminary injunction on July 20, finding Kalshi likely violated the Gambling Act and the Consumer Protection Act.

    Washington AG press release, July 21, 2026

  5. Aug 13, 2026

    Attorney general · Washington Attorney General · State of Washington v. KalshiEX LLC (King County Superior Court)

    The attorney general announced the court's order barring Kalshi from wagers on sports, elections, politics, entertainment, culture, tech and science, and mentions in Washington. Kalshi had to add an IP-based geofence by August 19 and a multi-source geofence by September 2, and the Court of Appeals had denied its request to stay the order.

    Washington AG press release, Aug. 13, 2026

  6. Sep 23, 2026

    Court · U.S. Court of Appeals for the Ninth Circuit · State of Washington v. KalshiEX, LLC (No. 26-3106)

    The Ninth Circuit paused Kalshi's appeal of the remand order until 30 days after its mandates issue in the Nevada cases, so the state-court injunction continues meanwhile.

    CourtListener docket, Ninth Circuit No. 26-3106

Federal courts

What the federal courts and the CFTC have said

States say prediction market sports contracts are bets that their gambling laws cover, while Kalshi and the CFTC say they are swaps, a kind of derivative that only the federal Commodity Exchange Act and the CFTC regulate. The Third Circuit appeals court sided with Kalshi against New Jersey in April 2026, while the Ninth Circuit (Nevada, August 2026) and the Sixth Circuit (Ohio and Tennessee, September 2026) ruled for the states, all at the preliminary stage. The Fourth Circuit (Maryland) heard argument in May 2026 and had not ruled as of November 3. New Jersey's petition to the Supreme Court, Flaherty v. KalshiEX (No. 26-299), is waiting on Kalshi's response due December 7, 2026, and the Court has not yet said whether it will hear the case. On October 9, 2026 the CFTC proposed a rule defining event contracts as swaps.

  1. Apr 6, 2026

    Court · U.S. Court of Appeals for the Third Circuit · KalshiEX LLC v. Flaherty (No. 25-1922)

    By a 2-1 vote, the appeals court for New Jersey, Pennsylvania and Delaware upheld an order that stops New Jersey from enforcing its gambling laws against Kalshi's sports contracts for now. It found Kalshi likely to win its argument that federal law overrides the state. This is a preliminary ruling, not a final judgment.

    Third Circuit opinion, Apr. 6, 2026

  2. Aug 28, 2026

    Court · U.S. Court of Appeals for the Ninth Circuit · KalshiEX LLC v. Assad (No. 25-7516)

    A unanimous three-judge panel upheld the order that lifted Kalshi's protection against Nevada, so Nevada may enforce its gambling laws against Kalshi's sports contracts. The court held that sports contracts are not swaps under federal law. It sent Kalshi's election contracts back to the district court. This is a preliminary ruling.

    Ninth Circuit opinion, Aug. 28, 2026

  3. Sep 2, 2026

    Court · Supreme Court of the United States · Flaherty v. KalshiEX, LLC (No. 26-299)

    New Jersey asked the Supreme Court to review the Third Circuit ruling. Kalshi's response is due December 7, 2026 after two extensions. Many states, tribes, the NFL and others have filed friend-of-the-court briefs. The Court has not decided whether to take the case.

    Supreme Court docket No. 26-299

  4. Sep 16, 2026

    Court · U.S. Court of Appeals for the Ninth Circuit · Blue Lake Rancheria v. Kalshi, Inc. (No. 25-7504)

    In a case brought by two California tribes, the court held the tribes are likely to win their claim that Kalshi's sports contracts offered on tribal lands break the federal Indian Gaming Regulatory Act, and sent the case back to the lower court. A Lanham Act (false advertising) claim was rejected.

    Ninth Circuit opinion, Sept. 16, 2026

  5. Sep 25, 2026

    Court · U.S. Court of Appeals for the Sixth Circuit · KalshiEX LLC v. Schuler (Ohio) and KalshiEX LLC v. Orgel (Tennessee) (Nos. 26-3196 and 26-5235)

    A unanimous panel upheld a federal judge's refusal to block Ohio's gambling laws and threw out the order that had protected Kalshi in Tennessee. It held Kalshi's sports contracts are not swaps and, even if they were, federal law does not override the states' gambling laws. The cases go back to the lower courts.

    Sixth Circuit opinion, Sept. 25, 2026

  6. Oct 9, 2026

    Regulator · Commodity Futures Trading Commission

    The CFTC proposed a rule that would expressly define event contracts, including those on sports, politics, culture and weather, as swaps, which would place them under federal rather than state oversight. The public may comment for 30 days after Federal Register publication (91 FR 66022). It is a proposal, not a final rule. The same day the CFTC issued an interim rule excluding casino-style gambling products, such as sportsbook wagers and casino games, from the swap definition (91 FR 65969).

    CFTC press release 9310-26, Oct. 9, 2026

  7. Oct 26, 2026

    Court · U.S. Court of Appeals for the Fourth Circuit · KalshiEX LLC v. Martin (Maryland) (No. 25-1892)

    No ruling yet. The appeal was argued May 7, 2026 and the parties were still filing supplemental authorities on Oct. 26, 2026.

    CourtListener docket, Fourth Circuit No. 25-1892

Your trades

Kalshi and Polymarket profits in Washington

Washington doesn’t tax them, but the federal rules do, and the method you choose can change your federal bill by thousands. The four methods, compared.

The court cases are about whether Washington can license or stop the platforms. None of them decides how your trades are taxed. Trades you already made, including positions an order made you close, still count in your tax year.

Ask your AI

Ask your AI about your taxes in Washington

Answer a few questions and we write the prompt for ChatGPT, Claude, Perplexity or any AI. It carries the four tax methods, your state’s rule and links to the pages behind them, checked November 3, 2026. Or run your actual trades for exact figures, free.

Tax year
Up or down this year?
Open positions on December 31?
Add rough numbers (optional)

The AI can then work the methods out for your year. Round figures are enough.

Your prompt

2,558 characters

I trade prediction markets on Kalshi. I'm working on my US federal taxes for 2026. I live in Washington.

From WagerMints, checked November 3, 2026:
- Kalshi's Documents page says it does not report profits and losses to the IRS.
- Forms it may send: 1099-INT for interest, 1099-MISC for credits and rewards, 1099-B or 1099-DA for crypto transfers.
- Its Profit and Loss statement uses first in, first out, is split by year and updates on the first morning of each month.
- Reward credits only appear in the activity export, not the trades export.
- The IRS has published no guidance on how event contracts are taxed.

Four ways traders report this:
1. Capital gains: Form 8949 and Schedule D, short- or long-term by holding period. Net losses offset up to $3,000 of other income a year, and the rest carries forward.
2. Section 1256: Form 6781, 60% long-term and 40% short-term however long I held. Positions open on December 31 count as sold at that day's value. Disputed: Camuso and Mukherjee (Tax Notes Federal, June 2026) conclude it isn't available, White & Case argues for it, and the CFTC's October 2026 proposal to call event contracts swaps cuts against it, because Section 1256 excludes swaps.
3. Ordinary income: net result on Schedule 1, line 8z.
4. Gambling: winnings on Schedule 1, line 8b. Losses only on Schedule A if I itemize, only up to winnings, and only 90% of them from 2026.

Washington: Washington has no personal income tax, so the state doesn't tax your gambling winnings or short-term prediction market gains. You still owe federal tax.
Legal status there: As of October 27, 2026, a Washington state judge has ordered Kalshi to stop offering wagers on sports, elections, politics, entertainment, culture, tech and science, and mentions to people in Washington, with a multi-source geofence required by September 2.

Read these pages:
- https://wagermints.com/kalshi-taxes
- https://wagermints.com/blog/how-kalshi-calculates-profit-and-loss
- https://wagermints.com/blog/how-to-report-kalshi-polymarket-taxes
- https://wagermints.com/state-taxes/washington

My question: How would my year come out under each of the four methods?

How to answer:
- Say which links you opened, and never describe one you didn't open. If one fails, use the facts above and say so.
- Mark each point [linked source], [general tax rule] or [unsettled].
- Put the methods side by side in one table for my year, and state any number you assume.
- Don't pick a method for me. End with questions for a CPA or enrolled agent, then anything you need from me.
Open in ChatGPTOpen in ClaudeOpen in Perplexity

WagerMints doesn’t see or store what you type here. The prompt goes to the AI you pick, under that company’s terms. Never add your Social Security number, API keys or wallet keys. AI answers can be wrong, so check them against the linked sources and a preparer.

Questions

Questions about Washington

Does Washington tax gambling winnings?
Washington has no personal income tax, so the state doesn't tax your gambling winnings or short-term prediction market gains. You still owe federal tax.
Can I deduct gambling losses in Washington?
Washington has no personal income tax, so there is nothing to deduct them from on a state return. Federal rules still apply.
Is Kalshi legal in Washington?
As of October 27, 2026, a Washington state judge has ordered Kalshi to stop offering wagers on sports, elections, politics, entertainment, culture, tech and science, and mentions to people in Washington, with a multi-source geofence required by September 2. The order is a preliminary injunction, and Kalshi is appealing. Crypto.com, Robinhood, Novig and Underdog have each sued Washington officials in federal court, and no ruling in those cases was found.
Does the court fight change how my trades are taxed?
No. These cases decide whether a state can license or stop the platforms. None of them decides how your trades are taxed, and trades you already made still count in your tax year.

States with the same rule on losses: Wyoming, Alaska, Florida, Nevada, New Hampshire, South Dakota. All states.

Tax facts checked against Washington’s own tax pages on October 26, 2026; legal status on October 27, 2026. Rules and cases change, so confirm with current instructions before you file.

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See your own year four ways

WagerMints prices your Kalshi or Polymarket year under all four federal methods, side by side, so you can see what Washington is taxing before you file. Free, no account.

Run your report