Funding rate calculator
See what perpetual futures funding costs or pays on a long or short position: each payment, each day, over the time you hold it, and the rate as a yearly figure. Free, no sign-up, nothing leaves your browser.
Enter a negative rate if shorts are paying longs. This assumes the rate and position size stay the same; in practice both change at every payment. The starting figures are an example, not a live rate.
What a funding rate is
A perpetual futures contract has no end date, so exchanges use regular funding payments to keep its price close to the market price of the coin. When the perpetual trades above the market price the rate is positive and traders holding longs pay those holding shorts; when it trades below, the rate is negative and shorts pay longs. The exchange passes the money between traders rather than keeping it.
Why it adds up
Each payment is the position's value times the rate, so a rate that looks tiny, such as 0.01%, is paid again and again: three times a day on many exchanges, or every hour on some. Held for weeks, funding can cost more than the trading fees. Rates change at every interval, so check the rate and schedule on your own exchange before relying on any figure.
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