What Is Funding Rate?
The funding rate is the mechanism that keeps perpetual futures prices anchored to the spot price. Here's everything you need to know.
How it works
Perpetual futures have no expiry date โ unlike quarterly futures. To prevent the perp price drifting too far from spot, exchanges charge a funding fee every 8 hours (on Binance/Bybit).
๐ด Positive funding rate (+): The perp is trading above spot. Longs pay shorts. This incentivises more shorts and fewer longs, pulling the perp price back down toward spot.
๐ข Negative funding rate (โ): The perp is trading below spot. Shorts pay longs. This incentivises more longs, pushing the perp price back up toward spot.
The default rate is 0.01% every 8 hours = 0.03%/day = ~10.95%/year if it never changes.
Funding fee formula
What actually sets the number
The exchange doesn't just pick a funding rate โ it's calculated every few seconds from two pieces: Funding Rate = Premium Index + clamped Interest Rate.
- Premium Index โ the average gap between the perp's traded price and the spot/index price over the interval. This is what does most of the work: a perp trading rich to spot produces a positive premium, which is why funding tends to spike whenever a coin is pumping on the futures market specifically.
- Interest Rate component โ a small, mostly fixed term meant to reflect the theoretical cost of borrowing one asset in the pair versus the other. It's usually a fraction of the total rate and rarely moves the number much on its own.
- Clamping โ exchanges cap how far the final rate can move per interval, so one violent price spike can't instantly produce an extreme funding print. This is also why funding often looks "smoothed" even when the perp briefly trades far from spot.
The practical takeaway: funding is a symptom of one-sided positioning, not a lever the exchange pulls to make money on you directly. If longs keep piling in above spot, the premium โ and the rate โ keeps climbing until enough of them get squeezed out or take profit.
Extreme funding = contrarian signal
- Market is extremely long-biased
- Longs are paying a lot to stay long
- Often precedes a reversal/long-squeeze
- Good moment to consider taking profits
- Market is extremely short-biased
- Shorts are paying to stay short
- Often precedes a short-squeeze up
- Longs can earn while waiting for reversal
A worked example
Say you open a $50,000 long on BTC perps while funding sits at a calm +0.01%/8h. That costs $5 every 8 hours โ about $15/day, barely noticeable against normal price swings. Three days later, BTC is rallying hard and funding spikes to +0.15%/8h as leveraged longs pile in. The same $50,000 position now costs $75 every 8 hours, or $225/day โ $1,575 if that rate holds for a week. Price hasn't needed to move against you at all for funding alone to erase a meaningful slice of an unleveraged week's return.
Flip the position and the math flips too: a short holder collects that +0.15%/8h instead of paying it. That's the core of funding-rate arbitrage โ pairing a spot long with a perp short (or vice versa) to collect the funding payment while the price exposure cancels out. See the arb calculator linked below for the breakeven math.
Where to check funding, and common mistakes
Every major exchange shows current and historical funding on the contract's trading page (Binance and Bybit both have a dedicated "Funding History" tab). Aggregators are worth checking too, since the same coin can carry very different funding rates on different venues at the same moment โ see the live funding rates page for a cross-exchange view.
- Ignoring funding on a multi-week hold: A leveraged position that's flat or slightly green on price can still be a net loser once weeks of funding payments are subtracted โ always add up the running cost, not just the entry-to-now price change.
- Mixing up settlement frequency across exchanges: An 8-hour rate and an hourly rate aren't directly comparable โ always normalize to a daily or annualized figure (like the calculator above does) before comparing venues.
- Trusting the "predicted" rate as final: Most exchanges show a predicted next funding rate that updates continuously until the settlement timestamp โ the number you see 10 minutes before settlement can still move before it's charged.
- Chasing funding yield without weighing fees: A venue with a juicier funding rate can still be more expensive overall once its taker fees and withdrawal costs are added โ compare the all-in cost, not just the headline rate.
Frequently asked questions
How often is funding paid?
On Binance, Bybit and OKX, funding settles every 8 hours at 00:00, 08:00 and 16:00 UTC. Some newer venues settle more often โ Hyperliquid and dYdX v4 pay funding hourly, which changes how fast a bad rate compounds.
Do I pay funding if I close my position before settlement?
No. You only pay or receive funding if you're holding an open position at the exact settlement timestamp. Closing even a few seconds before it avoids the payment entirely, though you still cross the bid/ask spread to exit.
Can the funding rate flip sign multiple times a day?
Yes. The rate is recalculated continuously from the premium between the perp price and the spot/index price, so it can flip from positive to negative between one settlement and the next if sentiment reverses quickly.
Does the exchange just set the funding rate manually?
No. It's derived from a formula โ mainly the premium between the perp and spot/index price, plus a small clamped interest-rate term โ recalculated continuously. The exchange doesn't choose the number; one-sided positioning does.