Futures Funding Rate Calculator
Calculate the cost or income from perpetual futures funding rate payments. Enter values for instant results with step-by-step formulas.
Formula
Funding Payment = Position Size x Funding Rate | Daily Cost = Payment x (24 / Interval Hours)
Each funding payment equals your position size multiplied by the funding rate percentage. Daily cost is the per-payment amount multiplied by the number of payments per day. Total cost multiplies the daily cost by the number of holding days.
Worked Examples
Example 1: Bitcoin Long Position Funding Cost
Problem: A trader holds a $10,000 long BTC position for 30 days. Funding rate is 0.01% every 8 hours.
Solution: Payments per day: 24 / 8 = 3\nPayment per interval: $10,000 x 0.01% = $1.00\nDaily cost: $1.00 x 3 = $3.00\nTotal payments: 3 x 30 = 90\nTotal cost: $1.00 x 90 = $90.00\nAnnualized rate: 0.01% x 3 x 365 = 10.95%
Result: 30-Day Cost: $90.00 | Daily Cost: $3.00 | Annualized Rate: 10.95%
Example 2: High Funding Rate During Bull Market
Problem: A trader holds a $25,000 long ETH position for 7 days. Funding rate spikes to 0.05% every 8 hours.
Solution: Payments per day: 24 / 8 = 3\nPayment per interval: $25,000 x 0.05% = $12.50\nDaily cost: $12.50 x 3 = $37.50\nTotal payments: 3 x 7 = 21\nTotal cost: $12.50 x 21 = $262.50\nAnnualized rate: 0.05% x 3 x 365 = 54.75%
Result: 7-Day Cost: $262.50 | Daily Cost: $37.50 | Annualized Rate: 54.75%
Frequently Asked Questions
What are funding rates in crypto futures?
Funding rates are periodic payments exchanged between long and short traders in perpetual futures contracts to keep the futures price anchored to the spot price. Unlike traditional futures that expire on a set date, perpetual futures have no expiration, so funding rates serve as the mechanism to prevent the futures price from deviating too far from the underlying spot market. When the funding rate is positive, longs pay shorts, which typically occurs when the market is bullish and more traders are long than short. When negative, shorts pay longs, usually during bearish sentiment. These payments happen at fixed intervals, typically every eight hours on most exchanges, and are calculated as a percentage of your total position size rather than just your margin.
How are funding rates calculated on exchanges?
Funding rates are calculated using two components: the interest rate and the premium index. The interest rate component reflects the difference in borrowing costs between the base currency and the quote currency, typically fixed at 0.01% per eight hours on most exchanges. The premium index measures the deviation between the perpetual futures price and the mark price derived from spot markets. When futures trade at a premium to spot (indicating bullish sentiment), the premium is positive and pushes the funding rate higher. When futures trade at a discount (bearish), the premium is negative. The final funding rate is clamped within exchange-defined bounds, typically between negative 0.75% and positive 0.75% per interval. Binance, Bybit, and OKX all use slightly different calculation methods, so rates can vary between exchanges for the same trading pair.
How do funding rates affect trading profitability?
Funding rates can significantly impact profitability, especially for positions held over days or weeks. At a seemingly small rate of 0.01% per eight hours, a ten-thousand-dollar position incurs three dollars per day in funding payments. Over thirty days, that totals ninety dollars or 0.9% of the position value. During bull market euphoria, funding rates frequently spike to 0.05% to 0.1% per interval, which translates to an annualized cost of fifty-four to one hundred nine percent. At these rates, a thirty-day hold on a ten-thousand-dollar position costs four hundred fifty to nine hundred dollars, dramatically reducing or eliminating trading profits. Conversely, traders on the receiving side of funding can earn significant passive income. Understanding funding rate dynamics is essential for any trader holding leveraged positions beyond a few hours.
What is funding rate arbitrage?
Funding rate arbitrage is a strategy that captures funding payments while maintaining a market-neutral position. The basic approach involves holding a long spot position and a short perpetual futures position (or vice versa) of equal size in the same asset. When funding rates are positive, the short futures position receives funding payments while the spot position provides the market exposure hedge. The profit comes purely from collecting funding with minimal price risk since the spot and futures positions offset each other. This strategy typically yields five to twenty percent annualized returns during normal market conditions and can exceed fifty percent during high-funding periods. Risks include funding rate reversal, exchange counterparty risk, liquidation risk on the futures leg, and the basis risk between spot and futures prices during extreme volatility events.
Why do funding rates spike during market moves?
Funding rates spike during strong market moves because of the imbalance between long and short open interest. During a sharp rally, many traders pile into long positions while few want to short, creating excess demand for long exposure. The funding rate increases to incentivize more shorts and discourage additional longs, acting as a self-correcting mechanism. Similarly, during crashes, negative funding rates spike as shorts overwhelm longs. These spikes serve as useful sentiment indicators because extremely high positive funding often precedes market corrections as the cost of maintaining longs becomes unsustainable, and extremely negative funding often precedes bounces. Funding rate data is one of the most watched on-chain metrics by crypto analysts. Sustained high funding rates above 0.05% indicate overleveraged markets that are vulnerable to liquidation cascades.
How often are funding payments settled?
Most major crypto exchanges settle funding payments every eight hours, resulting in three funding events per day at fixed times (typically 00:00, 08:00, and 16:00 UTC). However, some exchanges use different intervals. Binance and Bybit use the standard eight-hour cycle. dYdX settles funding continuously every hour, spreading payments across twenty-four intervals per day. FTX (before its collapse) used hourly funding settlements as well. Some newer exchanges experiment with one-hour or even per-block funding intervals to reduce the impact of traders strategically opening and closing positions around funding timestamps. You only pay or receive funding if you hold a position at the exact moment of the funding timestamp. This creates a strategy called funding rate sniping where traders open positions just before or after the funding timestamp depending on whether they want to collect or avoid the payment.