How Does Kalshi Work? Contracts, Odds & Fees Explained

Kalshi is a CFTC-regulated exchange where you trade Yes/No contracts on real-world events: elections, economic data, weather, sports. Each contract settles at $1 if you are right and $0 if you are wrong. The price in cents equals the market's implied probability, so a 60¢ Yes contract prices a 60% chance.

That is the whole model in one paragraph. The rest of this guide unpacks how the contracts trade, how to read a cent price as betting odds, what the fees actually cost you, and where Kalshi sits legally. If you just want to convert a contract price into American or decimal odds, the Kalshi & Polymarket calculator does it in one step.

What Kalshi actually is

Kalshi is a Designated Contract Market (DCM) licensed by the Commodity Futures Trading Commission, the same federal regulator that oversees futures on oil, wheat, and interest rates. It has held that license since November 2020 and opened to the public in 2021. So when you trade on Kalshi you are technically trading a financial derivative called an event contract, not placing a bet with a bookmaker.

The practical experience feels closer to a stock brokerage than a sportsbook. You fund an account in US dollars, browse markets, and buy or sell contracts at prices set by other traders. There is no house setting a line for you to take or leave. You are trading against other people, and Kalshi takes a fee for running the exchange.

Markets cover a wide range: will the Fed cut rates this quarter, will inflation come in above a threshold, how hot will it get in a given city, who wins an election, and increasingly sports outcomes. Each one resolves to a clear yes or no on a known date.

How Kalshi contracts work

Every market is a binary question with two sides:

• Yes contracts pay $1.00 if the event happens, $0 if it does not.
• No contracts pay $1.00 if the event does not happen, $0 if it does.

Contracts trade between 1¢ and 99¢. The price is the crowd's estimate of probability. If Yes is trading at 65¢, the market thinks there is roughly a 65% chance the event occurs. Buy one Yes contract at 65¢ and you risk 65¢ to make 35¢ if you are right.

Yes and No prices always add up to about $1.00. If Yes is 65¢, No is around 35¢. That is the same accounting as implied probability in sports betting, where the chances across all outcomes should sum to 100%. On a sportsbook that sum is padded above 100% by the vig. On Kalshi the two sides sum close to 100%, and the exchange makes its money on a transparent per-trade fee instead.

You do not have to hold a contract until it settles. Prices move as news comes in, and you can sell before the event resolves to lock in a gain or cut a loss, exactly like selling a stock.

Reading cents as odds

This is the part that trips up bettors coming from a sportsbook. A cent price is just a probability wearing a dollar sign. Once you see that, the conversion is mechanical.

A contract at price P (in dollars) implies a probability of P. To get odds:

• Decimal odds = 1 ÷ P
• American odds (favorite, P above 0.50) = −(P ÷ (1 − P)) × 100
• American odds (underdog, P below 0.50) = ((1 − P) ÷ P) × 100

Here is a small reference table:

A worked example

Say a Yes contract is trading at 60¢.

• Implied probability: 60%.
• Decimal odds: 1 ÷ 0.60 = 1.67.
• American odds: −(0.60 ÷ 0.40) × 100 = −150.
• Payout: you risk 60¢ per contract to win 40¢, so a 100-contract order costs $60 and returns $100 if Yes settles at $1.

The No side of that same market sits near 40¢, which is +150 in American terms. Buy No at 40¢ and you risk 40¢ to make 60¢. Notice these are raw prices before fees; the real return is slightly lower once the fee comes out. The prediction markets calculator applies the Kalshi fee for you so you see the true breakeven, not the paper one.

Fees, funding, and payouts

Fees. Kalshi charges a per-contract fee at the moment you trade, not a cut of your winnings. The taker fee follows a 0.07 × C × P × (1 − P) shape, where C is the number of contracts and P is the price in dollars. That formula peaks when a contract is near 50¢ (maximum uncertainty) and shrinks toward zero as the price approaches 1¢ or 99¢. Makers who post resting orders pay less. Fee schedules change, so check Kalshi's current fee page before you size a trade. For a full Kalshi vs Polymarket fee breakdown, see the Kalshi vs Polymarket comparison.

Funding. Kalshi runs entirely in US dollars. You deposit by ACH bank transfer, debit card, or wire, and there is no crypto involved. Before your first deposit you complete identity verification: legal name, address, date of birth, and SSN, which federal regulation requires. There is a native iOS and Android app plus the website.

Payouts. When a market resolves, every winning contract is credited at $1.00 automatically and losers go to $0. You withdraw back to your linked US bank account by ACH, typically within a few business days. Withdrawal terms can change, so confirm the current process in your account.

Kalshi vs a sportsbook

The gap between Kalshi and DraftKings or FanDuel is structural, not cosmetic.

The last row matters if you are sharp. Retail sportsbooks routinely limit or gub winning bettors. An exchange has no reason to do that, because Kalshi earns the same fee whether you win or lose. It wants volume, not losers.

The vig point is worth sitting with. On a standard −110/−110 sportsbook line the two sides imply about 105% total probability, and that extra 5% is the book's edge baked into every price. On Kalshi the two contract prices sum close to 100%, and you pay a separate fee you can actually see. That does not make Kalshi automatically cheaper on every trade, but it does make the cost legible, which is the first thing any +EV bettor wants. If you want the deeper mechanics across platforms, the prediction markets guide walks through order books, settlement, and pricing in more detail.

Is Kalshi legal? Is it gambling?

Federally, Kalshi operates as a regulated derivatives exchange under CFTC oversight, not as a sportsbook. Its contracts are classified as financial instruments, which is the whole basis for the platform being available nationwide rather than only in states that have legalized sports betting.

Whether that counts as "gambling" is partly semantic and partly an open legal fight. Functionally, buying a Yes contract on an uncertain outcome carries risk much like a wager. Legally, it has been treated as trading a federally regulated derivative. Those two framings collide most sharply on sports event contracts, which several states argue are sports betting in disguise. As of 2026 Kalshi has faced state-level challenges over its sports markets, and some of those cases are still being litigated, so availability of certain market categories can vary by where you live. Federal legality is settled; state-by-state treatment of specific markets is not.

None of that is tax or legal advice. If you trade meaningful size, verify the current status in your state and treat any profit as reportable income; confirm the specifics with a tax professional, since thresholds and rules change.

A simple way to think about Kalshi strategy

You do not need a complicated system to start, but a few principles separate disciplined traders from tourists.

• Price is probability. Trade the gap. If you genuinely believe an outcome is 70% likely and Yes is trading at 60¢, that is a positive expected value trade. If you cannot articulate why your number differs from the market's, you do not have an edge.
• Compare Kalshi to the wider market. When the same outcome is priced on a sportsbook or another prediction market, convert both to a common format and look for a real discrepancy. Sometimes the gap is large enough to arbitrage across platforms; the prediction market arbitrage guide covers how to lock that in.
• Respect the fee. A trade that looks +EV on the raw price can turn negative after the per-contract fee, especially near 50¢ where the fee is largest. Run the numbers before you click.
• Use limit orders. Posting a resting order rather than crossing the spread lowers your fee and gets you a better entry when the market comes to you.

Kalshi rewards the same habits that make someone a good sports bettor: estimating probabilities honestly, accounting for costs, and only acting when the price is wrong in your favor. Start small, size with the prediction markets calculator so you always know your real breakeven, and treat every contract as a probability you are either buying cheap or selling rich.