Comparison of Trading Costs on Polymarket US and Kalshi for 100 Contracts

WHY IT MATTERS

Prediction markets are platforms where people can place trades on whether certain real-world events will happen, similar to placing a bet on the outcome of a game. Think of a contract like a ticket that pays out if a specific event occurs. When comparing platforms like Polymarket US and Kalshi, the cost of trading matters because fees work like transaction charges at a bank — they eat into whatever you might gain. For newcomers, understanding that different platforms charge different amounts for essentially the same type of trade is important, just as you might compare fees between different stock brokerages before opening an account.