How to use the funding fee calculator
A perpetual funding fee calculator determines the periodic 8-hour cash flow payments and cumulative holding costs incurred when trading perpetual futures contracts. Because perpetual futures have no expiration date, exchanges exchange peer-to-peer funding payments between long and short contract holders every 8 hours to anchor the contract mark price to the underlying spot index price.
- 1Select your contract side: Long (buying perps) or Short (selling perps).
- 2Enter your total Position Notional Value in USD (Collateral × Leverage).
- 3Input the current 8-hour Funding Rate % (e.g. +0.0100% standard baseline).
- 4Specify your planned Holding Duration in days to project total funding settlements.
- 5Review periodic payment per 8 hours, cumulative holding cost, annualized APR yield, and break-even price offset.
The formula
- Periodic Funding Payment
- Position Notional × (8h Funding Rate ÷ 100)
- Total Cumulative Payment
- Periodic Payment × (Holding Days × 3)
- Annualized Funding Rate (APR)
- 8h Funding Rate × 3 × 365 days
- Break-Even Price Offset (%)
- Total Cumulative Fee ÷ Position Notional × 100
Worked example: holding a $25,000 long perpetual for 14 days
Suppose you hold a $25,000 notional Long position on Bitcoin during a bullish market regime where the average 8-hour funding rate is +0.03% (annualized APR = 0.03% × 3 × 365 = 32.85%).
Every 8 hours (at 00:00, 08:00, 16:00 UTC), you pay: $25,000 × 0.0003 = $7.50 directly to short traders. Over 24 hours (3 settlements), your daily carrying cost is $22.50.
Over 14 days (42 settlements), your total cumulative funding cost is: $7.50 × 42 = $315.00. This represents a 1.26% drag on your position notional, meaning Bitcoin must appreciate by at least 1.26% just for your trade to break even before trading commissions are included.
The 8-Hour Settlement Mechanics
Funding is only paid or received by traders holding open positions at the exact moment of the funding timestamp (typically 00:00 UTC, 08:00 UTC, 16:00 UTC). If you close your position 1 minute before the funding interval, you pay zero funding.
When the funding rate is positive (+), long positions pay short positions. When the funding rate is negative (−), short positions pay long positions.
Cash and Carry Basis Arbitrage
Institutional trading desks exploit high positive funding rates via cash-and-carry arbitrage: buying spot Bitcoin and shorting an equal notional value of perpetual futures to lock in delta-neutral annualized funding yields without directional price risk.
Frequently asked questions
Does the crypto exchange keep the funding fee?
No. Funding fees are entirely peer-to-peer transfers between long and short traders. The exchange facilitates the settlement process and does not take a cut or retain funding proceeds.
Why do funding rates turn heavily positive during bull markets?
During bull rallies, aggressive demand to open leveraged long positions pushes the perpetual contract price above the spot index price. The funding rate climbs positive to penalize longs and incentivize short liquidity, pulling the contract back in line with spot.
Can funding fees trigger position liquidation?
Yes. For isolated margin positions, funding payments are deducted directly from your position margin buffer. If a trade is held for weeks against high funding rates, the collateral can be depleted until the position is liquidated.
What is considered a normal or average funding rate?
A baseline funding rate of +0.0100% per 8 hours (approx. 10.95% annualized APR) is standard across major exchanges. Rates above +0.05% indicate elevated bull sentiment, while rates above +0.10% reflect extreme market leverage euphoria.