The funding rate is the periodic payment exchanged between long and short positions in a perpetual futures contract, designed to keep the perpetual price anchored to the spot price. When the market is bullish and perp price trades above spot, longs pay shorts. When bearish and perp trades below spot, shorts pay longs. This transfer mechanism replaces the expiry settlement that standard dated futures use to converge to spot.
How funding rates are calculated and paid
Most exchanges calculate funding every 8 hours. The rate is based on the premium index: how far the perpetual mid-price is above or below the spot index price, averaged over the funding interval. Exchanges typically cap the rate at 0.75% per 8-hour period (2.25% daily, about 820% annualized) to prevent extreme imbalances. The standard “neutral” rate at most exchanges is 0.01% per 8 hours (0.03% daily, roughly 10.95% annualized), often called the base rate, charged even when perp and spot prices are aligned.
The payment is calculated on notional position size, not margin. If you hold $100,000 long BTC on Binance and the funding rate is +0.05% (longs pay shorts), you pay $50 every 8 hours, $150 per day, $4,500 per month. At 10x leverage, your $10,000 margin is paying $150/day, which is 1.5% of margin per day eroding just from funding. This is the cost many traders miss when comparing perp and spot positions. The mechanics of perpetual futures more broadly are covered in our perpetual futures explainer, and the carry trade strategy that funding rates enable is in our basis trading guide.
What this means for traders
Funding rates work as both a cost and a signal. As a sentiment indicator: persistently high positive funding (above 0.05% per 8 hours for more than a few days) signals crowded long positioning, the market is paying a premium to maintain leveraged exposure. Historically, sustained high funding has preceded significant corrections as longs get liquidated or reduce positions to avoid the carry cost. The May 2021 crash saw BTC funding rates hit 0.15%+ across major exchanges for ten consecutive days before the 50% correction. Negative funding (shorts paying longs) typically indicates fear and often precedes recoveries.
As a carry trade: when funding is high, delta-neutral traders go long spot and short perp, collecting the funding payment without directional risk. When funding is negative, the trade reverses: short spot (or hold stablecoins), long perp, collect funding from shorts. The risk is that the funding rate flips before your position is closed, turning a carry trade into a directional position. Tracking live funding rates across exchanges: Coinglass shows a heatmap of rates across Binance, OKX, Bybit, and others, differences of 0.02% per 8 hours between exchanges create small arb opportunities for well-capitalized traders.
A concrete example
During the ETH price run-up from $1,800 to $3,800 in Q1 2024, ETH perp funding on Binance averaged approximately +0.03% per 8 hours for six weeks. A trader holding $50,000 long ETH perp paid: $50,000 × 0.03% × 3 (daily payments) × 42 days = $1,890 in funding. That’s 3.78% of their position value in six weeks just in funding costs, before exchange fees. Spot ETH held through the same period had no funding cost. The perp trader needed ETH to outperform spot by 3.78% just to break even on the funding drag, which it did (perps typically trade slightly above spot during bull runs due to futures basis), but the margin was narrow. Now flip it: a delta-neutral trader short that same $50,000 notional perp (hedged with $50,000 spot ETH) collected $1,890 in funding payments, a 3.78% return with minimal directional risk.
Frequently asked questions
Can funding rates go very negative? Yes. During the bear market in late 2022, ETH funding rates on some exchanges went as low as −0.10% per 8 hours for extended periods, meaning longs were being paid to hold long positions. This extreme negative funding reflects how heavily positioned the market was short. Traders willing to go long in high-fear environments collected significant funding income.
Do funding rates differ between exchanges? Yes, sometimes significantly for smaller altcoins. BTC and ETH rates converge across major exchanges via arbitrage, but for mid-cap altcoins, one exchange might show +0.10% while another shows −0.02%. This spread is the arb opportunity: long on the negative-rate exchange, short on the positive-rate exchange, collect both rates.
Is funding paid in USD or the underlying asset? It depends on the contract type. Inverse contracts (common on BitMEX, Bybit) denominate both margin and funding in the underlying asset (BTC). Linear USDT-margined contracts (Binance, OKX) settle funding in USDT. In a bull market with positive funding, receiving funding in BTC is better than receiving it in USDT if BTC continues rising, but this is a secondary consideration for most traders.
