
You’ve probably seen a Kalshi ad recently. Maybe a friend mentioned it or you spotted it during a game broadcast. The pitch sounds simple enough – pick Yes or No on something happening and collect $1 per contract if you get it right.
But as of March 2026, Washington state became the latest to sue Kalshi, claiming the platform runs an illegal gambling operation dressed up as a prediction market. Courts in Arizona, Massachusetts, Ohio and Nevada have already weighed in and Kalshi now faces more than 20 civil lawsuits across the country. So what is Kalshi? is it legal? And should you be using it?
Kalshi calls itself a prediction market. The simplest way to understand that label is this: instead of placing a traditional bet with a sportsbook, you buy a contract on whether something will happen. If you get it right, the contract pays out $1. If you get it wrong, you lose what you put in. The platform covers sports, politics, economics, crypto, culture and more.
Sports contracts make up more than 90% of activity on the Manhattan-based platform and accounted for 89% of the site’s revenue in 2025, with analysts describing activity on the platform as “heavily tied to the sports calendar.”
Kalshi was founded in 2018 by Tarek Mansour and Luana Lopes Lara, two MIT alumni who identified a gap in the market for a place where people could trade contracts on future outcomes. It received its CFTC Designated Contract Market designation in November 2021. After its public launch in July 2021, Kalshi spent the next several years adding categories before entering sports markets in January 2025.
A traditional sportsbook takes the other side of your bet. When you win, the sportsbook loses. Kalshi does not work that way. Kalshi does not take the opposite side of a user’s trade and has no financial stake in any event outcome. Revenue comes from transaction fees, not from betting against customers.
Getting started takes a few minutes. You can sign up using an email address, a Google account or your Apple ID. After choosing your method and setting a password, Kalshi runs a standard KYC identity verification process. You’ll need to be 18 or older and based in the US. The Kalshi app is available on iOS and Android. Once your identity clears, you can fund your account and start trading.
The prediction markets cover sports, technology, climate, pop culture, economics, political events and more. These markets are structured as simple Yes-or-No questions, such as “Will X win the presidential election?” or “Will X become the Governor of a certain state?”
Sports dominate the platform right now. You’ll find spread bets, over/under wagers, proposition bets and multi-leg combos across football, basketball, baseball, soccer, tennis and more. Beyond sports, you can trade on Fed rate decisions, crypto prices, box office results, award show outcomes and economic data releases.
Contracts on Kalshi are priced between $0.01 and $0.99, with the price reflecting the market’s perceived probability of an event occurring. A correct prediction pays out $1 per contract, regardless of the purchase price.
So if you buy a Yes contract at $0.60 and the event happens, you collect $1, a $0.40 profit on that contract. If the event doesn’t happen, you lose your $0.60. You can also sell your position before the event settles if the odds move in your favor. Contracts trade continuously and you can exit early if the odds shift in your favor.
The fee Kalshi charges varies depending on the odds of the contract, with higher fees for events close to 50/50 and lower fees for extreme favorites or longshots.
Kalshi uses a formula-based fee structure.
A contract priced at $0.50 (where the outcome feels like a coin flip) carries the highest fee. Contracts priced near $0.05 or $0.95 carry the lowest. Trading fees on Kalshi are typically less than 2% per contract. For instance, the fee for a $100 trade is capped at $1.74.
Debit card deposits carry a 2% processing fee. ACH bank transfers, wire transfers, PayPal and Venmo deposits carry no processing fees. Crypto deposits may be subject to transfer provider fees and blockchain network fees. Kalshi itself does not add fees on top of crypto network costs. ACH withdrawals carry no fee, while debit card withdrawals incur a $2 flat charge.
This is where the debate gets complicated and where reasonable people land on different sides. The honest answer is that courts, regulators and legal scholars are still working it out.
Kalshi argues that its contracts are financial derivatives not gambling products. The company holds a Designation as a Contract Market under the Commodity Exchange Act, issued by the CFTC.
Under that framework, Kalshi operates the same way a regulated futures exchange does. It matches buyers and sellers, charges transaction fees and settles contracts based on real-world outcomes. Kalshi’s head of communications, Elisabeth Diana, stated the platform is “a regulated, nationwide exchange for real-world events” and that it “is subject to exclusive federal jurisdiction.”
The CFTC’s current chair has also signaled support for prediction markets. CFTC Chair Mike Selig has argued that these companies offer derivatives contracts that are appropriately regulated at the federal level.
States take a different view, that prediction markets are gambling. Kalshi’s platform is used primarily for sports betting, which constitutes more than 90% of the activity on the site and 89% of the site’s revenue in 2025, according to Sacra. Critics argue that wrapping a sports bet inside a Yes/No contract and calling it a “derivative” doesn’t change what the product actually does.
Washington state’s lawsuit argues that Kalshi’s activities fall squarely within the state’s definition of gambling –”staking or risking something of value upon the outcome of a contest of chance or a future contingent event.” States point out that each Kalshi sports contract risks money, depends partly on chance and promises a payout to the winning side, the same structure that defines gambling under most state laws.
A federal judges in New Jersey has at least temporarily blocked state enforcement against Kalshi, while state-court decisions in Massachusetts and Ohio have sided with state regulators by insisting that Kalshi obtain traditional sports-betting licenses.
Here’s a snapshot of the Kalshi’s major lawsuits:
| State | Action Taken | Current Status | Outcome |
|---|---|---|---|
| Arizona | Criminal charges filed, March 2026 | Active litigation | Kalshi moved to federal court |
| Massachusetts | State regulators required sports-betting license | State court sided with regulators | Ongoing |
| Ohio | Sued for offering illegal sports contracts | District court ruled against Kalshi | Kalshi appealing |
| Nevada | Sought temporary restraining order | Court granted TRO, then preliminary injunction | Kalshi temporarily blocked in state |
| Washington | Civil lawsuit filed March 27, 2026 | Kalshi filed to move to federal court | Active litigation |
In January 2026, users who held correct positions on certain NFL bets were only repaid their original stake rather than the full winnings. Only following backlash from users and gambling industry analysts did Kalshi pay out the users in full.
A second controversy involved Kalshi’s college outreach. In 2025, Kalshi engaged in efforts to create a “student ambassadors” program where students could sign up to promote Kalshi on their campuses in order to “bring the next 100 million users to prediction markets.” Following backlash, the related social media post and web page were taken down.
Kalshi also briefly attempted to recruit a 15-year-old influencer to promote its brand. The company did not repeat that outreach after public scrutiny.
The core legal question comes down to jurisdiction. Kalshi says federal law governs its contracts through the CFTC’s Commodity Exchange Act designation. States say their gambling laws apply regardless of how Kalshi classifies its products. Legal experts say this argument will likely wind up before the U.S. Supreme Court.
A bipartisan bill introduced, the Prediction Markets Are Gambling Act, would ban sports betting on prediction market platforms, a sign that Congress is also paying attention. Until one branch of government settles the question definitively, the legal picture stays unsettled.
The following reviews are subject to change as more people provide feedback.
Kalshi holds a legitimate federal license and is under the CFTC. That oversight (from the CFTC) means Kalshi is accountable to the regulator through regular audits and rules against insider trading.
On the safety side, all trades on the platform stay cash-collateralized, so you cannot lose more than what you’ve put in for each position. Without leverage or margin options, the platform avoids the typical pitfalls of large losses common on other trading platforms.
The regulatory structure also means Kalshi operates differently from offshore betting sites with no accountability. Your deposits sit in a regulated environment and Kalshi must follow CFTC rules around market manipulation and fair contract settlement.
First, your access may vary by state. Courts have already blocked or restricted Kalshi’s sports markets in Nevada, Ohio and Massachusetts and the Washington lawsuit adds more uncertainty. Check whether your state has any active enforcement actions before depositing.
Second, the regulatory picture remains in flux. While both prediction market providers and states have had some initial legal victories, this argument is likely to wind up before the U.S. Supreme Court. A ruling there could expand or restrict access to Kalshi’s markets significantly.
Third, the Kalshi controversy around market settlement, specifically the January 2026 NFL payout issue, shows that the platform has had some growing pains. Kalshi did ultimately make users whole in that case, but it’s worth reading the platform’s rulebook before you trade.
Kalshi holds a real federal license, operates under CFTC oversight and gives users a different way to trade on real-world events. The platform’s Yes/No contract model is transparent, fees stay competitive for most trades and the app experience gets high marks from the majority of users.
At the same time, “legitimately regulated” and “without controversy” describe two different things. More than 20 lawsuits, an unsettled federal-versus-state legal battle, a payout dispute in January 2026 and ongoing questions about who Kalshi markets to all deserve a spot in your thinking. You now have the full picture – what Kalshi is, how it works, what it costs and where the disputes stand. The call is yours to make.