🧮 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.
Taker = you cross the spread / hit a resting order (pays the full fee). Maker = you post a resting limit order that someone else fills (a quarter of the fee, or nothing, depending on the market).
Full fee rate for takers · makers pay 25% of the taker fee. Fees vary by series; confirm yours on Kalshi's fee schedule.
Buying at 40¢, you need to sell at 44¢ or higher to break even after fees.
Uses Kalshi's fee formulas: taker M × 0.07 × contracts × price × (1 − price), maker M × 0.0175 × … on series that charge makers, where M is the market's fee multiplier (MLB is 0.5). Fees are charged when an order fills, rounded up; there's no fee at settlement. Always confirm against Kalshi's current fee schedule.
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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 leg we compute the fee for the market you picked: taker M × 0.07 × contracts × price × (1 − price), maker M × 0.0175 × … on markets that charge makers, rounded up.
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 taker fee is M × 0.07 × contracts × price × (1 − price), where M is the market's fee multiplier (1 for most markets, 0.5 for MLB). Because of the price × (1 − price) term, the fee is largest near 50¢ and smallest near 1¢ or 99¢. Fees vary by series, so confirm yours on 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 pay a quarter of the taker fee on markets that charge makers (most NFL, NBA and college football markets) and nothing on many others.
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 fees up rather than down, in small increments, so your fee is never under the formula. This calculator rounds up to a hundredth of a cent; check Kalshi's fee schedule for the exact rounding rule.