POLYMARKET vs KALSHI Fees: How They Compare for US Traders
polymarket vs kalshi fees is a common question for traders evaluating where to deploy capital. This article breaks down the fee structures in plain terms, focusing on how each platform prices binary YES and NO contracts and how that translates into edge opportunities. You’ll see how Kalshi’s USD settlement and per-contract charges interact with aggressive pricing on NO or YES legs, and why your choice of venue matters for arbitrage. KalshiArb later outlines how to measure costs using real-ticket examples and our YES + NO < $1.00 alert signals.
How Kalshi fees are structured for binary markets
Kalshi charges a per-contract trading fee on each fill, applicable to both makers and takers in standard markets. Fees scale with the price of the contract and are closer to zero when prices sit near the extremes of $0.01 or $0.99 and peak near the middle. The practical effect is that buying YES and NO in a binary market when the best-ask spread leaves you with a small edge can be costed into the arbitrage calculation. Because settlements are fixed at $1.00 for the winning side, understanding this fee curve is essential to estimate true edge in intra-market plays.
Polymarket fees vs Kalshi fees: the delta
Polymarket is crypto-settled and uses different fee and settlement mechanics than Kalshi, which is a CFTC-regulated USD market. While both venues aim to price contracts around $1.00, the fee structures and settlement rails differ, affecting how quickly edge can be realized in practice. KalshiArb focuses on intra-market spreads where YES and NO prices add to less than $1.00, exploiting the gap before fees. Remember that cross-platform arbitrage is outside the scope of KalshiArb’s core intra-market signals.
Impact of YES/NO pricing and edge opportunities
On Kalshi, each market has a YES and a NO contract with prices that sum to about $1.00 at fair value. When the best-ask YES plus best-ask NO is below $1.00, you can buy both legs and lock in a risk-defined profit after accounting for fees. This edge is sensitive to fee curves and slippage, so precise pricing and timing matter. KalshiArb’s alerts are designed to flag when the intra-market window opens for this edge under current fee conditions.
What to consider for arbitrage on Kalshi vs Polymarket
If you trade within Kalshi, you’re operating in a regulated USD market with explicit settlement rules and a centralized clearinghouse. Fees are posted per contract and apply to both sides of a binary. When comparing to Polymarket, you must contrast not only fee rates but also settlement timing, liquidity, and regulatory risk considerations. For users pursuing intra-market arb, KalshiArb provides a non-custodial scanner and AI agent to help you spot and act on edge signals consistent with Kalshi’s fee structure.
Start exploiting edge with KalshiArb
Try KalshiArb’s pricing signals today. Our non-custodial scanner and AI agent target intra-market edges with YES + NO < $1.00 alerts, tailored to Kalshi’s fee schedule.
FAQ
- What is the basic difference in fees between polymarket and kalshi for binary markets?
- Polymarket is crypto-settled and uses its own fee and settlement model, whereas Kalshi uses USD settlement with per-contract trading fees. In practice, the edge calculation focuses on the gap where YES and NO prices sum to less than $1.00, but you must account for each platform’s fee curve.
- How do YES and NO prices affect edge and costs?
- Edge arises when best-ask YES plus best-ask NO is under $1.00, allowing you to buy both legs and lock in a profit after fees. Because fee curves peak near midpoint pricing, the exact edge depends on where each leg trades, slippage, and the platform’s per-contract fee on your total position.
- Can I reliably use fee comparisons to pick a platform for arbitrage?
- Fee comparisons are important but not sufficient alone. You must also consider settlement currency (USD vs crypto), liquidity, regulatory status, and timing risk. KalshiArb concentrates on intra-market edge signals consistent with Kalshi’s rules and fee structure.