🧮 Kalshi Fee Calculator
Buying at one price and selling at another — both as a taker? Here's exactly what Kalshi charges you, and what you actually keep.
How Kalshi fees work
Kalshi charges a trading fee every time you take liquidity (cross the spread to fill an order immediately). The fee isn't a flat percentage — it scales with how uncertain the contract is, peaking at a 50¢ price and shrinking toward the 1¢ and 99¢ ends. This calculator applies Kalshi's published formula to your exact trade so you know the real cost before you click, not after.
Enter your trade
Put in your buy price, your intended sell price, and the number of contracts. Prices are in cents (1–99), the same way Kalshi quotes them.
We apply Kalshi's fee formula
For each taker leg we compute fees = round-up(0.07 × contracts × price × (1 − price)), rounded up to the next whole cent — exactly how Kalshi bills it.
See net P&L and breakeven
The calculator shows total fees, gross vs. net profit, fees as a share of your gross, and the minimum sell price you'd need to break even after fees.
Compare maker vs. taker
Toggle either leg between taker and maker. Resting (maker) fills on standard markets pay no trading fee, so you can see exactly what patience saves you.
Frequently asked questions
How much are Kalshi's fees?
Kalshi's standard taker fee is round-up(0.07 × contracts × price × (1 − price)). Because of the price × (1 − price) term, the fee is largest on coin-flip contracts near 50¢ and smallest on lopsided contracts near 1¢ or 99¢. A few market types use a different coefficient, so always confirm against Kalshi's current fee schedule.
Does Kalshi charge a fee to sell or at settlement?
You're charged the taker fee whenever you take liquidity — that can be on entry, on exit, or both. Holding a contract to settlement is free; there's no separate settlement fee. If your resting order gets filled (maker), you typically pay no trading fee on standard markets.
What's the difference between a maker and a taker?
A taker crosses the spread and fills immediately against a resting order — and pays the fee. A maker posts a limit order that rests in the book until someone else fills it — and pays no trading fee on standard markets. Toggling the legs in this calculator shows the cost difference.
Why is the fee rounded up?
Kalshi rounds each taker fee up to the next whole cent, so even tiny trades incur at least 1¢ of fee per execution. This calculator rounds the same way so your estimate matches your statement.