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Kalshi tariffs explained for crypto-native traders

Traders searching for "kalshi tariffs" usually want to know what fees or surcharges Kalshi charges on event contracts and how those costs affect P&L. Kalshi is a CFTC-regulated event-exchange; its fee structure differs from prediction markets built on blockchain. Below we summarise the basics, what to watch for, and how a low-latency arbitrage tool like PolyArb can change the calculus.

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What Kalshi is and where tariffs fit

Kalshi is a US-regulated event exchange offering binary-style contracts on real-world outcomes. Traders pay explicit fees or commissions per trade and may encounter exchange-level charges that differ from decentralised platforms. Tariffs, in common parlance, refer to the sum of explicit fees plus any execution or clearing costs that eat into gross spread.

How fees change arbitrage math

Any explicit tariff reduces the arbitrageable edge. If you buy two complementary legs to lock a spread, you must subtract both sides' commissions, clearing fees, and any latency-driven slippage. On decentralised CLOBs like Polymarket, maker fees are zero and taker fees vary by category, but fee mechanics differ from Kalshi's regulated model.

Practical steps for traders comparing platforms

Check the exchange's published fee schedule and ask about hidden costs: clearing, minimums, and withdrawal rules. Measure round-trip latency and expected fill rates — slower execution increases realized cost. For cross-platform comparisons, normalise fees per-dollar-traded and per-trade, not per-contract.

Where PolyArb fits in

PolyArb is a Polymarket-focused arbitrage bot that reduces execution and information risk. It runs live today at $99/month, offers ~40ms latency versus ~800ms for free bots, and guarantees a $7.62 minimum edge per trade. You get Telegram and Discord alerts and a non-custodial setup so execution sits in your wallet.

Try PolyArb for faster, cleaner arbitrage

Start a PolyArb subscription at $99/month to access 40ms latency, Telegram + Discord alerts, non-custodial execution, and a $7.62 minimum guaranteed edge per trade.

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FAQ

Does Kalshi charge a flat tariff per trade?
Exchange fees vary; check Kalshi's published fee schedule. I’m not certain of their current flat-per-trade tariff — consult Kalshi directly for exact numbers.
Do tariffs make arbitrage impossible?
Not necessarily. Tariffs reduce the net edge. Successful arbitrage requires the gross spread to exceed all fees, slippage, and settlement risks. Tools that lower latency and improve fills can restore profitability.
How does Polymarket’s fee model compare?
Polymarket uses a CLOB with maker fees of zero and variable taker fees by category. The mechanics differ from regulated exchanges; always verify both platforms’ fee rules before trading.

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