Funding rates create scheduled payments between traders in perpetual futures. A positive rate generally means long positions pay short positions, while a negative rate reverses that flow. The payment applies only when a position is open at the venue’s funding time. A trader who closes beforehand does not take part in that settlement.
Why perpetual contracts use funding
A traditional futures contract has an expiry date. A perpetual contract stays open until the trader closes it or the venue liquidates it. Exchanges use funding to discourage the perpetual price from drifting too far from its reference market. When demand pushes perpetuals above spot, positive funding raises the cost of holding a long. A discount can produce negative funding and shift the cost to shorts.
The sign offers a snapshot of positioning pressure, not a forecast. Positive funding can persist while prices rise, and negative funding can remain during a decline. Hedging also complicates the signal. A trader may short a perpetual against spot holdings to reduce directional exposure rather than express a bearish view.
Calculate the payment from notional value
Bybit documents the basic calculation as position value multiplied by the funding rate. Suppose a long position has $20,000 of notional exposure and the next finalized rate is positive 0.01%. The payment is $20,000 multiplied by 0.0001, or $2, from the long side to the short side.
The amount of margin posted does not replace the position value in that calculation. A trader might control the same $20,000 position with $2,000 of initial margin, yet the funding payment still uses the documented position-value convention. That setup makes a modest dollar payment larger relative to the capital committed. It also leaves less room for an adverse price move before liquidation.
Negative 0.02% on the same $20,000 position would send about $4 from the short side to the long side. Contract denomination, mark price and exchange rules can change the exact amount, so the venue’s settled ledger is the final record.
Check the clock and the final rate
Funding intervals vary by trading pair. Bybit gives an eight-hour contract as one example, with payments at 00:00, 08:00 and 16:00 UTC, while warning that individual products can use different schedules and limits. Multiplying one displayed rate by three assumes all three settlements keep the same rate. That assumption can fail quickly in a volatile market.
Projected funding can also move before settlement. Check whether the screen shows an estimate or a finalized rate, then confirm the next funding time in UTC. Closing a position a few minutes before or after that point can change whether the payment occurs.
Estimate the full cost before trading
Funding is only one expense. Add entry and exit commissions, spread, slippage and any borrowing or conversion charges. Stress-test a rate with the opposite sign and a larger absolute value. Compare the expected payment with available margin rather than treating a positive receipt as guaranteed income.
Keep a record of the contract, position value, displayed rate, settlement interval and final debit or credit. If the result differs from a calculator, check whether the position changed, the projected rate moved, or the venue used mark price at settlement. Those records are more useful than an annualized figure built from one temporary rate.
Adapted from Crypto Funding Rates Explained: How Perpetual Futures Cost Money.