What Is a Funding Rate in Perpetual Futures?
Key Takeaways
A funding rate is a small periodic payment between long and short perpetual futures traders that keeps the contract price aligned with the underlying spot market. Without a funding mechanism, a contract with no expiration would lack the main recurring incentive that pulls its price toward spot.
Funding settles every one to eight hours depending on the venue. BitMEX uses eight-hour intervals; Binance and OKX use eight-hour intervals by default; Hyperliquid and dYdX v4 settle hourly. Shorter intervals make funding adjustments settle more frequently, though each venue's formula and sampling rules also matter.
The funding rate has two components. A premium index measures how far the perpetual trades from the spot index. An interest rate component sets a baseline that holds even when the perpetual is trading right at spot. Defaults vary by venue: Binance, OKX, and BitMEX commonly use 0.01% per eight-hour period; dYdX v4 sets it to 0%. In calm markets the interest rate component shapes funding; in sustained rallies the premium component drives it higher.
When the perpetual trades above spot, longs pay shorts. When it trades below, shorts pay longs. A positive funding rate means longs pay; a negative funding rate means shorts pay. Most venues apply per-period caps to limit single-cycle payment shocks.
Funding payments are exchanged trader-to-trader, not paid to the venue. A perpetual exchange or DEX collects trading fees separately, on each open and close. Funding flows between counterparties on opposite sides of the contract, sized by the position's notional value.
What is a funding rate?
Every perpetual futures contract relies on a recurring payment between traders to keep its price tethered to the underlying spot market. That payment is the funding rate: a small amount exchanged between long and short positions, calculated on the position's notional value, and settled at regular intervals — usually every one to eight hours depending on the venue.
The direction depends on where the perpetual trades relative to spot. When the perpetual trades above spot, longs typically pay shorts. When it trades below spot, shorts typically pay longs. A positive funding rate means longs pay; a negative funding rate means shorts pay.
BitMEX introduced the mechanism with the XBTUSD perpetual swap on May 13, 2016. Since then, the same basic design has become standard across crypto perpetual futures venues, though each venue applies its own formula, cadence, and caps.
Why the funding rate exists
A traditional futures contract has an expiration date. As expiration approaches, the gap between the futures price and the spot price usually narrows because the contract will settle against a defined final value. That final settlement creates a hard convergence point.
A perpetual futures contract has no expiration settlement. A trader can keep the position open as long as they meet the venue's margin requirements, so there is no final date when the contract must converge with spot. Without another incentive, a perpetual could trade persistently above spot when demand for long exposure is high, or below spot when short demand dominates.
Funding replaces that single expiration event with a recurring economic adjustment. If the perpetual trades above spot, longs pay shorts, making long exposure more expensive and short exposure more attractive. If the perpetual trades below spot, shorts pay longs. The payment does not force exact convergence, but it creates a repeated pull that helps keep the contract broadly aligned with the underlying market.
(For the full comparison between perpetual and traditional futures, see our guide.)
How the funding rate is calculated
Across major venues, the funding rate is built from two components. Each venue implements its own sampling rules and weighting, but the structure is consistent.
The premium index
The premium index measures how far the perpetual is trading from the underlying spot market at any given moment. Most venues derive the premium from sampled differences between the perpetual market and a spot index, often using impact bid/ask or mark-price inputs over the funding period.
When the perpetual trades persistently above the index, the premium index is positive. When it trades persistently below, it is negative. The premium index is the responsive part of the funding rate. When a market suddenly rallies and the perpetual races ahead of spot, the premium is what pushes the funding rate higher within hours.
The interest rate component
The interest rate component is a small fixed value, set by each venue, intended to reflect the cost of capital. Defaults vary. Binance, OKX, and BitMEX commonly express it as 0.01% per eight-hour period (roughly 0.03% per day), while dYdX v4 sets the default at 0%. Where the component is positive, it holds steady regardless of market conditions, which is why perpetuals on those venues usually carry slightly positive funding even in calm markets. At a positive default, longs pay shorts a small amount each cycle just to maintain the position.
How the two combine
At a high level, venue formulas combine the premium and interest components, then apply venue-specific dampeners, clamps, and per-period caps before any payment settles. In calm markets the interest rate component (where it is non-zero) shapes funding and the rate sits near its baseline. In sustained rallies or selloffs the premium component dominates and funding can move to multiples of the calm-market level.
The exact formula varies by venue. Hyperliquid, dYdX v4, Binance, OKX, and BitMEX each implement small differences in how the premium is sampled, how the components are weighted, and how the resulting rate is clamped. The per-period caps mean that even during extreme market events the funding rate cannot move beyond the bounds the venue defines.
Example: Funding on a 10x BTC long
A trader opens a 10x long BTC position on a venue with eight-hour funding intervals. The example below shows how the same position changes when funding moves from a calm baseline to a high-rate period.
Entry price: $60,000
Margin posted: $1,000
Leverage: 10x
Position notional: $10,000 (≈ 0.167 BTC)
Funding cadence: every eight hours
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Calm market: funding prints at +0.01% per eight-hour period
The premium index is near zero (the perpetual is trading close to spot) and the interest rate component dominates. Funding is at its default level.
The payment is calculated on the position's notional value, not on the trader's margin: $10,000 × 0.01% = $1.00
The trader (long) pays $1 to the short side at the funding interval. Holding the position through three funding intervals in a 24-hour period costs $3, or about 0.3% of the trader's $1,000 margin per day. In a quiet market, funding is modest relative to P&L from price moves.
Volatile market: funding prints at +0.10% per eight-hour period
A few days later, BTC has rallied. The perpetual trades persistently above spot, the premium index has pushed higher, and funding has moved to ten times its calm-market level.
The same position now pays: $10,000 × 0.10% = $10 per funding interval
Across three intervals in a day, the trader pays $30, or roughly 3% of the trader's $1,000 margin per day. Held for a week through that funding regime, the position absorbs $210 in funding payments alone, before any price-move P&L.
The takeaway from the two scenarios: funding is small in normal markets and material in extreme ones. A position held through a sustained funding spike accumulates costs quickly, which is one of the reasons funding rates are watched as a market signal as much as a payment mechanism.
Funding parameters across selected venues
Selected perpetual venues implement funding with different cadences, settlement times, and interest rate defaults. The table below is a reference snapshot based on public documentation checked in May 2026; contract-level parameters can change, so traders should confirm the current schedule before opening or holding a position.
Venue | Default funding cadence | Notes |
|---|---|---|
BitMEX | 8 hours | Settlements at 04:00, 12:00, and 20:00 UTC. The original implementation; funding has been part of the XBTUSD perpetual swap since launch on May 13, 2016. (BitMEX funding docs) |
Binance USDⓈ-M | 8 hours | Default settlements at 00:00, 08:00, and 16:00 UTC. The venue can update a contract's interval during extreme market volatility under its interval-adjustment rules. (Binance docs) |
dYdX v4 | 1 hour | Funding samples are taken every minute and combined hourly. v4 architecture only; v3 used a different cadence. The default interest rate component is 0%, so funding is driven by the premium. (dYdX docs) |
Hyperliquid | 1 hour | Funding is computed on an eight-hour-equivalent basis and paid hourly at one-eighth of the computed rate. (Hyperliquid docs) |
OKX | 8 hours | Default cadence is eight hours unless a contract specifies one-, two-, or four-hour settlement; OKX can adjust settlement frequency according to market conditions or automatic cap/floor rules. (OKX docs) |
One visible difference among venues is cadence (one-hour vs eight-hour). Shorter intervals smooth funding swings into more frequent, smaller payments. Longer intervals concentrate funding into fewer, larger settlements, which can be material if a trader holds across a single high-funding cycle without realizing it. Other differences (formula construction, caps and floors, interest defaults, index oracle design) can be just as consequential and are spelled out in each venue's docs.
Funding in calm, bullish, and bearish markets
Funding changes as the balance between long and short demand changes. Three common regimes are worth knowing.
Calm markets. Funding often sits near the venue's baseline. On a venue with a 0.01% eight-hour interest component, that equals roughly 0.03% per day. The payment may look small for short-held positions, but it can add up for trades held across many funding intervals.
Bullish markets or crowded longs. Funding skews positive when buyers add to long perpetual positions, pushing the perpetual price above spot, which drives the premium component higher and the funding rate with it. During strong rallies, rates on venues that quote eight-hour funding can rise to several multiples of a 0.01% baseline, including illustrative levels such as +0.05% or +0.10% per period. Holding a long position through that environment is materially expensive. At +0.10% per eight hours, the position pays 0.3% of notional per day, which can meaningfully reduce account equity even when the trade is profitable on price.
Bearish markets or crowded shorts. Funding can turn negative when the perpetual trades below spot. In that case, shorts pay longs. Negative funding can be less common on venues with a positive interest-rate baseline, but it can appear during sharp selloffs or periods when short positioning becomes crowded.
Funding is useful context, not a trading signal by itself. A high positive or negative rate can suggest crowded positioning, but traders usually read it alongside price action, open interest, liquidity, and broader market conditions.
Common misconceptions about the funding rate
A few points where new perpetual traders often get the mechanics wrong.
Funding is not a fee paid to the venue. Funding is a transfer between counterparties on opposite sides of the contract. The exchange or DEX collects trading fees separately, on each open and close of a position. A trader who holds a position through funding intervals is paying or receiving from other traders, not from the platform. Venue fee policies differ in the details, but funding should be understood separately from trading fees.
Funding is not interest on borrowed margin. A perpetual futures position uses margin as collateral, not as a borrowed balance. The funding rate is calculated on the position's notional value, not on the leverage multiple or on any borrowed amount. A trader controlling a $10,000 position with $1,000 of collateral and a trader controlling the same $10,000 position with $5,000 of collateral pay the same funding amount per interval.
Funding is separate from the liquidation rule. Funding payments are credited or debited from the trader's wallet or margin balance at each funding interval, not from a separate fee account. A position's liquidation threshold is set by maintenance margin rules. Funding debits do reduce account equity or available margin, however, and if those debits push an account below maintenance requirements over time, they can contribute to liquidation risk.
