How does Kalshi work?
Updated August 2026
Kalshi is a US-regulated exchange where you trade on real events, elections, economic numbers, weather, sports, by buying YES or NO contracts. It gets described as a betting app, but under the hood it works like a tiny stock market. Here's the machine in plain words.
Everything is a $1 contract
Every Kalshi market is a question that resolves YES or NO. A contract on the winning side pays exactly $1; the losing side pays zero. Until resolution, contracts trade anywhere from 1¢ to 99¢, and the price is the crowd's percent chance: a YES trading at 34¢ means the market says 34%.
34¢ → $1
An order book, not a bookmaker
There's no house setting odds against you. You trade with other people through an order book: buyers post what they'll pay, sellers post what they'll take, and trades happen where they meet. You can lift the going price instantly or park a limit order at your own number and wait. It's the same plumbing as a stock exchange, which is exactly what the CFTC regulates it as.
(Foresee works differently on this one point: our markets use an always-on market maker, so there's never a queue. Same percents, less furniture, see how betting works here.)
What it actually costs
Kalshi doesn't bake a vig into the odds the way a sportsbook does. Instead it charges a small fee per trade, scaled by probability: fees peak around 50/50 coin flips (roughly 7¢ per contract for a round trip) and shrink toward the extremes. Honest design, but it means fast in-and-out trading on coin flips quietly eats your edge.
| You trade | Fee bite |
|---|---|
| A 50% coin flip | biggest |
| A 90% near-lock | small |
| A 10% longshot | small |
| Hold to resolution | one fee instead of two |
Money in, money out
Deposits come in by bank transfer (ACH), debit card, PayPal or Venmo, no crypto required, which is Kalshi's big usability difference from Polymarket. Withdrawals go back through the banking system and take days, not seconds. And because it's a regulated exchange, profits are taxable and paperwork exists, less romantic than an offshore book, considerably better when something goes wrong.
What you can trade
The board runs from CPI prints and Fed decisions to hurricanes, award shows, and, since the courts opened the door, a fast-growing sports section that now drives much of Kalshi's volume. Every market publishes its exact resolution rule up front: what counts, which source decides, and when.
Where it's allowed
Federally regulated does not mean universally welcome. Several states argue event contracts are gambling under their laws: as of mid-2026, Michigan, Nevada and Massachusetts have court orders blocking Kalshi, and more cases are moving. The full picture lives in our legality guide, and it changes often enough to check before depositing.
Quick answers
How do I start betting on Kalshi?+
Sign up, verify your identity (it's a regulated US exchange, so 18+ with ID), deposit via bank transfer, debit, PayPal or Venmo, then buy YES or NO contracts on any open market. Each contract costs its current price in cents and pays $1 if you're right.
Do I need a lot of money?+
No. Contracts cost under $1 each, so you can trade with a few dollars. Fees are charged per contract though, so tiny trades give up a bigger share to costs.
Is Kalshi legal?+
Federally, yes, it's a CFTC-regulated exchange. But several states contest it: as of mid-2026 Michigan, Nevada and Massachusetts have court orders blocking it, with more litigation moving. Check your state.
Does Kalshi report to the IRS?+
It's a regulated US exchange, so expect tax forms and taxable trading profits, the same as brokerage gains. Keep records, and ask a tax professional rather than a glossary.
How long do Kalshi withdrawals take?+
Withdrawals go back through the banking system, typically a few business days rather than instantly. Plan for that before you need the money.