What is funding rate in perpetual futures
- Perpetual futures have no expiration date, so they need another way to stay close to the spot price.
- The funding rate is a periodic payment between long and short traders that does this job.
- A positive funding rate means longs pay shorts; a negative rate means shorts pay longs.
- Funding is a recurring payment that can be paid or received while a position remains open; its cumulative effect depends on rate, interval and notional.
Perpetual futures ("perps") are the most heavily traded type of crypto derivative, and the funding rate is the mechanism that makes them work — quietly, in the background, every few hours.
The problem it solves
Traditional futures contracts have an expiration date, at which point they settle against the actual spot price — that built-in settlement keeps the futures price anchored to reality. Perpetual futures deliberately have no expiration date, which is convenient for traders but removes that natural anchor. Without something else in place, a perpetual contract's price could drift arbitrarily far from the actual spot market.
How funding rate fixes this
The funding rate is a periodic payment exchanged directly between traders holding long and short positions, typically every 8 hours (though this varies by exchange). It's calculated based on the difference between the perpetual contract's price and the underlying spot price.
- Positive funding rate: the perpetual is trading above spot, so long position holders pay short position holders. This creates an incentive to open shorts (or close longs), pushing the perpetual price back down toward spot.
- Negative funding rate: the perpetual is trading below spot, so short position holders pay long position holders — the reverse incentive, pushing the price back up.
This payment doesn't go to the exchange — it's a direct transfer between traders on opposite sides of the market, funded by whichever side is currently pushing the price away from spot.
How funding affects an open position
A position that remains open at a funding timestamp can either pay or receive the funding payment according to its direction, the venue formula and the applicable rate. The cumulative amount depends on position notional, funding rate, settlement interval and holding duration.
A strongly positive or negative funding rate describes the current payment imbalance and can coincide with one-sided positioning. It does not by itself predict future price direction or establish a trading opportunity.
A simplified example
Hypothetical example: with a +0.01% funding rate and a $10,000 long notional at a funding timestamp, the modeled payment is $1 for that interval. At three identical intervals per day, the arithmetic total would be about $3 per day or $90 over 30 days, assuming the rate and notional stayed unchanged. This is an illustration of the formula, not a trading plan.
Key takeaway
Funding is a periodic transfer mechanism used by perpetual markets to help keep the contract price near spot. It can be paid or received and its economic effect depends on the venue formula, rate, interval and position notional. Funding rate alone does not forecast the next market move.
Check the current rate — the terminal's funding snapshot shows BTC's live rate, next payment time, and open interest.