The Kalshi perpetuals funding rate
The funding rate is the mechanism that makes perpetual futures possible, and it is also a cost that quietly adds up if you ignore it. Understanding it is part of understanding the true cost of holding a perp.
Here is how it works on Kalshi. This is educational, not financial advice.
Why funding exists
A perpetual future never expires, so there is no settlement date to pull its price back in line with the real asset. The funding rate solves that. It is a small periodic payment exchanged between traders that nudges the perpetual's price to stay anchored to the underlying spot price.
Every 8 hours, between traders
On Kalshi, funding is exchanged every 8 hours. Crucially, it flows between longs and shorts, not to the exchange as a fee. Depending on conditions, you might pay funding or receive it. When the perpetual trades above spot, longs typically pay shorts; when it trades below, the flow reverses.
It is a real cost of carry
If you are on the paying side, funding is a recurring drag that compounds the longer you hold. A position held for days or weeks can accumulate meaningful funding costs even if the price barely moves. For leveraged positions, that cost is magnified relative to the margin you put up.
Factoring it in
Before holding a perp for any length of time, consider the funding direction and rate. A short-term trade may barely notice it; a longer hold can see funding meaningfully change the result. Treat it as part of the cost of the position, alongside any trading fees and the price risk itself.