What a crypto funding rate is
A crypto funding rate is a periodic payment exchanged directly between the long and short holders of a perpetual futures contract, sized to keep the contract's price tethered to the underlying spot market.
It is not a fee the exchange collects. It moves between traders, which is why it can be earned as well as paid — and why it sits at the centre of most market-neutral crypto yield strategies.
Two things make the rate worth understanding even if you never trade a perpetual. It is the clearest real-time read on how the derivatives market is positioned. And it is the return source behind a large share of products marketed as "delta-neutral yield," so knowing how it behaves tells you a great deal about how those products behave.
Why perpetual contracts need the mechanism at all
A dated futures contract keeps itself honest. As expiry approaches, its price must converge on spot, because at settlement the two are the same thing. Arbitrage enforces that convergence mechanically, and no ongoing payment is required.
A perpetual contract never expires. Remove the settlement date and you remove the force that pulls the contract back to spot — the price could drift away and stay there indefinitely. Exchanges replace the mechanical tether with an economic one: a recurring payment flowing from whichever side is pushing the price away from spot to the side absorbing it.
When the perpetual trades above spot, the rate is positive and longs pay shorts. When it trades below, the rate is negative and shorts pay longs. The payment makes the crowded side progressively more expensive to hold, which is what drags the contract back toward the index.
How exchanges calculate it
Almost every major venue uses the same two-component structure, with the same clamp.
The premium index measures how far the perpetual is actually trading from the spot index. OKX states it as [Max(0, Impact bid price − Index price) − Max(0, Index price − Impact ask price)] / Index price, where the impact prices are drawn deep enough into the order book to resist manipulation — OKX sizes that depth as 200 × Max leverage allowed (OKX). This is the component that does the work.
The interest rate is a fixed constant representing the carry differential between the quote and base currency. On Binance it is 0.03% daily, which is 0.01% per interval when funding is paid every eight hours (Binance). Bybit derives the same figure as 0.03% / (24 / funding interval), and sets it to 0% on pairs where no carry differential applies, such as USDCUSDT (Bybit). OKX fixes it at 0.01% across all intervals (OKX).
The two are combined with a damper and then capped. Bybit's formulation shows the full shape:
Funding Rate = clamp[ Average Premium Index + clamp(Interest Rate − Average Premium Index, 0.05%, −0.05%), Upper Limit, Lower Limit ]
The inner ±0.05% clamp stops the interest-rate term from dominating when the premium is extreme. The outer limits are tied to margin requirements — Bybit sets them at ±min((Initial Margin Rate − Maintenance Margin Rate) × 0.75, Maintenance Margin Rate) — so a venue can never charge a funding payment large enough to liquidate a position on its own.
The practical takeaway: that 0.01% interest constant means a perfectly balanced market still pays a small positive rate to shorts. There is a structural floor, and it is small.
Reading a positive or negative rate
A positive rate means the perpetual is trading at a premium and leveraged longs are paying to hold. The higher the rate, the more crowded and more expensive that side has become. A negative rate means the opposite: the contract is at a discount and shorts are paying.
What the rate does not tell you on its own is whether the level will persist. For that, read it alongside two other numbers:
- Open interest. Rising open interest with a strongly negative rate means traders are actively adding new shorts, not just holding old ones — the "crowded short" condition. Falling open interest with the same rate means positions are closing and the pressure is draining.
- The spot–perpetual basis. Funding and basis are two views of the same imbalance. A persistent premium produces persistent positive funding; when the two disagree, one of them is about to move.
What the rate costs the side paying it
Most explanations are written from the perspective of the trader collecting funding. It is worth doing the arithmetic from the other side, because that is where the rate's economic force actually shows up.
Take a trader holding a $20,000 long position in a BTC perpetual at 5× leverage, so $4,000 of their own capital is at work. At a crypto funding rate of 0.03% per eight hours — elevated, but a level reached routinely in a strong market — they pay 0.09% of notional per day. That is $18 a day on the position, against $4,000 of committed capital: roughly 0.45% of their capital per day, or about 13.5% over a month, purely in funding, before any price movement.
That is the tether doing its job. A crowded long position becomes expensive at a rate that compounds against the leverage used to hold it, which is precisely what eventually forces the position closed and the premium back toward zero. The higher the leverage, the faster the carry cost bites.
Funding intervals differ, and it matters
The interval is not a detail. It changes what a quoted number means.
| Venue | Default interval | Notes |
|---|---|---|
| Binance | 8h — 00:00, 08:00, 16:00 UTC | Can shorten to 4h or 1h under extreme volatility |
| Bybit | 8h, settled 00:00 / 08:00 / 16:00 UTC | Pre-market perpetuals differ: fixed 0.005%, settled every 4h |
| OKX | 8h — 00:00, 08:00, 16:00 UTC | Configurable per contract to 4h, 2h or 1h |
| Hyperliquid | 1h | Computes an 8h rate, pays one-eighth of it each hour |
Hyperliquid's approach makes the point. It computes the same eight-hour rate but settles hourly at one-eighth the size, with an interest constant of 0.00125% per hour — about 11.6% annualised paid to shorts — and a cap of 4% per hour (Hyperliquid). A rate quoted on an hourly venue and a rate quoted on an eight-hour venue are not comparable until you normalise them. Comparing the two raw numbers is one of the most common errors in this space.
Kraken, Binance, Bybit, OKX and Hyperliquid each differ further in index composition and cap methodology. Check the venue's own documentation before committing collateral to a rate you have only seen on an aggregator.
Converting a rate to an annualised figure
The arithmetic is simple and the caveat is the important part.
An 8-hour rate pays three times a day. So:
- 0.01% per 8h → 0.03% daily → about 10.95% annualised
- 0.05% per 8h → 0.15% daily → about 54.75% annualised
Both figures assume the current rate holds for a full year. It will not. Rates move with leverage demand, compress when positioning balances, and invert outright in bearish conditions — bitcoin's rate was negative for 46 consecutive days through mid-April 2026 (Phemex). An annualised funding figure is a unit of comparison between venues at a moment in time. It is not a yield, and it is not a forecast.
Two further cautions on any annualised number you are shown. It is almost always calculated on notional, not on the capital required to hold the position — which is a materially smaller denominator. And it is gross: trading fees on both legs come out of it, and at rates near the 0.01% floor those fees can consume a third of the return or more.
Funding as a sentiment indicator
This is where the rate earns attention from people with no intention of harvesting it.
Because the rate is the live price of leveraged exposure, extremes mark positioning extremes. Deeply negative readings have repeatedly coincided with local market bottoms — the pattern appeared in March 2020, mid-2021, November 2022 and early 2023. In April 2026, bitcoin's seven-day average reached roughly −0.005%, the most negative in about three years, with commentary at the time reading it as a bottoming signal (CoinDesk, citing Glassnode).
Treat that as a positioning observation, not a trading rule. "Crowded shorts have historically preceded rallies" is a statement about a handful of episodes, each with its own cause — a mining ban, an exchange failure, a banking crisis, a tariff shock. The honest version is narrower: a sustained extreme rate tells you one side of the market is carrying an expensive position, and expensive positions are eventually closed. It does not tell you when.
Current rates across major venues are on our markets page, and how we run the strategy sets out what we do with them.
By VectorTraders Editorial Team · Published SEP 15, 2026.
This guide is educational and is not investment advice. Figures shown are illustrative and are not projections of return. Capital deployed on trading venues is at risk.
This article is for information only and is not investment advice. Past performance does not guarantee future results.
