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Is Kalshi Haram? What Islam Says About Polymarket and Prediction Markets

Kalshi, Polymarket and other prediction markets are generally considered haram, because event contracts match the definition of gambling (maysir).

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Short answer

Kalshi, Polymarket and similar prediction markets are generally considered haram under the Islamic rules on gambling. Buying a "yes" or "no" contract on an event is paying money for a chance to win other people's money depending on an uncertain outcome, which matches the definition of maysir (gambling) that the Qur'an forbids. Being legal or regulated, or being called "trading," does not change the ruling.

Prediction markets like Kalshi and Polymarket have exploded in popularity. They let you trade on almost anything: elections, interest rate decisions, sports results, award shows, even the weather. Because they are presented as "markets" and "trading" rather than betting, and Kalshi is regulated by a US financial regulator, many Muslims are unsure whether they count as gambling. This guide explains how the Islamic rules apply.

Is Kalshi haram?

Based on how Islamic law defines gambling, using Kalshi to trade event contracts is generally considered haram. The same applies to Polymarket and other prediction market platforms. Specific fatwas on these newer platforms are still limited, but the principles scholars use to judge gambling apply to them very directly.

As with any financial question, if you have an unusual situation, ask a qualified scholar who understands Islamic finance.

How do prediction markets like Kalshi and Polymarket work?

Prediction markets sell event contracts on a yes-or-no question, such as "Will the Fed cut interest rates this month?" or "Will this team win the championship?"

  • Each contract pays out a fixed amount (for example $1) if the event happens, and nothing if it does not
  • The price of a contract (for example 35 cents) reflects how likely traders think the event is
  • When the event is decided, the people holding the correct side are paid, and the people holding the wrong side lose what they paid

Kalshi is a US exchange regulated by the Commodity Futures Trading Commission (CFTC). Polymarket is a crypto-based prediction market where contracts are traded using a stablecoin. They differ legally and technically, but the underlying transaction is the same: you pay now, and whether you win or lose your money depends entirely on how an uncertain event turns out.

Why are prediction markets considered gambling in Islam?

The Qur'an prohibits maysir (gambling) clearly: "O you who have believed, indeed intoxicants, gambling, [sacrificing on] stone altars, and divining arrows are but defilement from the work of Satan, so avoid it that you may be successful" (Qur'an 5:90). It also says that although gambling may contain some benefit, "their sin is greater than their benefit" (Qur'an 2:219).

Scholars describe gambling as a transaction with these features:

  1. Each side puts up money
  2. The outcome is uncertain and outside your control
  3. One side's gain is exactly the other side's loss, so no real value is created
  4. Nothing real is exchanged, such as a product, a service, or ownership of an asset

A prediction market contract has every one of these features. When you buy "yes" at 35 cents, you are paying for the chance to win 65 cents of someone else's money if you guessed right. Calling it a "contract" or a "trade" does not change what is actually happening.

Prediction markets also involve excessive gharar (uncertainty). The Prophet ﷺ "forbade the transaction which involves uncertainty" (Sahih Muslim 1513), and a contract whose entire value depends on a future event you cannot control is a clear example.

No. Being legal and regulated by the CFTC means Kalshi is lawful under US law and has to follow consumer protection rules. It does not make it halal. Casinos and lotteries are also legal and regulated in many places, and they are still haram. In Islam, the ruling depends on what the transaction actually is, not on its legal status or what it is called.

What about using prediction markets to "hedge" or as an investment?

Some people argue that prediction markets are useful for hedging risk, or that they are just another kind of investing.

  • Hedging: Islamic finance does have tools for managing real risks, such as takaful (cooperative insurance). But almost everyone who uses Kalshi or Polymarket is speculating on outcomes they have no real exposure to, which is betting. Even a genuine hedge built from gambling contracts does not become permissible because the motive is good.
  • Investing: Halal investing means owning a share of something real, such as a business through permissible stocks, real estate, or a partnership, and sharing in its actual profit and loss. An event contract owns nothing. When it settles, it is worth either the full amount or zero.

It is also worth noting that the Prophet ﷺ said even inviting someone to gamble requires an act of charity in expiation (Sahih Bukhari 4860), which shows how seriously gambling is treated.

What should you do if you have already used Kalshi or Polymarket?

If you have used prediction markets, you are not alone, and the door of repentance is always open.

  • Stop placing new trades and close your account if you can
  • Make sincere tawbah (repentance): regret it, stop, and resolve not to return
  • Deal with any winnings: many scholars advise that you may keep the money you originally deposited, but any profit above it should be given away to charity, without intending it as your own sadaqah or expecting reward for it. Ask a scholar if your situation is complicated
  • Watch for the pull to come back. Prediction markets, like other forms of gambling, are designed to be habit-forming. If you are struggling to stop, seek support

Replacing a habit is easier than simply removing one. Many people find that filling those moments with something good, such as dhikr, reading Qur'an, or simply praying on time, helps them move on.

Salah Home can help with that last part: log each of the five prayers with a tap, grow your streak, and earn Dates to build your own Salah Home along the way.

Frequently asked questions

Is Polymarket haram?

Polymarket works the same way as Kalshi: you buy yes-or-no contracts and win or lose money based on the outcome of an uncertain event. That matches the Islamic definition of gambling (maysir), so it is generally considered haram. Using crypto or stablecoins does not change the ruling.

Is it still haram if I only bet small amounts?

Yes. The prohibition of gambling applies regardless of the amount. A small bet is still a bet.

Isn't trading on Kalshi the same as trading stocks?

No. A halal stock represents ownership in a real business, and its value comes from that business's actual profit and loss. An event contract represents no ownership. It only pays out if a particular event happens, and one trader's gain is another trader's loss, which is what makes it gambling.

What should I do with money I won on a prediction market?

Many scholars advise keeping only the amount you originally deposited and giving any profit above it to charity, without considering it your own sadaqah. For complex situations, ask a qualified scholar.

Yes. Kalshi is legal and regulated in the US, but legality does not determine whether something is halal. Islamic rulings are based on the nature of the transaction, and event contracts are a form of gambling.

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