Funding rate: the fee on a perpetual that nobody quotes you upfront
A funding rate is a recurring payment between holders of long and short perpetual futures positions, settled at fixed intervals. It exists because a perpetual contract has no expiry date to force its price back in line with the underlying asset, so a payment is used instead: whichever side the contract price favours pays the other. You pay or receive it for as long as the position stays open, and the venue normally takes none of it.
A funding rate is a small payment that passes between traders holding opposite sides of a perpetual futures contract, settled every few hours for as long as positions stay open. It is not a commission: the money leaves the accounts on one side of the market and arrives in the accounts on the other, and the venue normally keeps none of it.
That makes it the one cost on a perpetual nobody shows you before you click buy. The commission is on the fee schedule. The spread is on the order book. Funding is a variable charge, in an unknown direction, that depends on what the rest of the market is doing while you hold.
Why a contract with no expiry date needs a tether to spot
A perpetual futures contract tracks the price of an asset without ever settling. That is the appeal: you can hold a leveraged position on an asset indefinitely without rolling into a new contract.
It is also the problem. A dated futures contract is kept honest by expiry. Whatever the contract trades at today, on the settlement date it has to converge with the price of the underlying asset, because that is what it pays out against. Traders know this, so arbitrage keeps the two prices from drifting far apart in the first place. The deadline does the work.
Remove the deadline and nothing anchors the contract. A perpetual is just a market in a derivative, and if enough people want leveraged exposure in one direction, the contract price can float away from the asset it is supposed to represent. A contract that tracks the asset only loosely is not useful for much.
So the anchor is rebuilt as a payment. Each interval, the contract price is compared with a reference price for the underlying asset. If the perpetual is trading above that reference, longs pay shorts. If it is trading below, shorts pay longs. The side that is crowded pays for the privilege, and the payment creates a steady incentive to take the unpopular side: shorting an overheated perpetual earns income while you wait, which brings sellers in and pushes the price back toward spot.
The whole mechanism is a convergence device. Expiry is free and automatic. Funding is continuous and someone has to pay for it, which is the trade-off you accept when you choose an instrument that never expires.
What it costs you, and why the sum is bigger than it looks
Two features of funding decide its impact, and both are easy to underestimate.
First, it is charged on position size, not on the margin you posted. Second, it repeats. Each interval that passes with your position open is another charge.
Work through a hypothetical. These figures are invented for the arithmetic, not drawn from any venue:
- Suppose funding settles every eight hours, three times a day.
- Say the rate is 0.01% per interval, and you are on the paying side.
- Say you open a long worth $20,000 in notional value, funded with $2,000 of your own margin at 10x leverage.
Each payment is 0.01% of $20,000, which is $2. Three payments a day is $6. Hold for a week and you have paid $42.
Measured against the $20,000 position, $42 is about 0.21%, which sounds trivial. Measured against the $2,000 you actually put up, it is 2.1% in a week, and the week has to deliver a 2.1% gain on your capital before you are even. That is the number that matters, because that is your money. Leverage multiplies funding against your equity by exactly the same factor it multiplies profit and loss.
Now make the rate less friendly. Suppose a stretch of crowded positioning pushes the rate to 0.08% per interval. The same position pays $16 three times a day, $48 daily, $336 across a week: 16.8% of your margin, for holding still. Nothing about the asset’s price has changed in that sum. You can do this arithmetic for your own assumed rate and holding period in the funding rate calculator, and fold it into a trade’s full cost alongside commissions with the crypto profit calculator.
The rate can also run the other way. Hold the unpopular side and the same mechanism pays you, which is why some strategies exist only to collect funding rather than to express a view on price.
The mistake: treating funding as a flat background charge
The common error is not ignoring funding entirely. It is budgeting for it as though it were a fixed subscription, like a commission expressed in basis points, and then being surprised when the bill arrives.
Three specific versions of this:
Treating the current rate as the rate you will pay. Funding is recalculated every interval from live market conditions. The rate you saw when you opened is a reading, not a quote. In calm conditions it may sit in a narrow band for weeks. In a crowded, one-directional market it can rise many times over, and that is exactly when your position is most likely to be large and held longest.
Assuming you pay in proportion to time held. You do not. Funding settles at a fixed moment and charges whoever holds the position then, for the full amount. Hold for two minutes across a settlement and you pay the whole interval. Hold for seven hours between two settlements and you pay nothing. For short-term positions, funding is not a smooth cost, it is a toll gate you either cross or do not.
Reading the rate against notional instead of margin. A rate quoted in hundredths of a percent looks like a rounding error next to a position, and that is the frame it invites. The relevant comparison is against your own capital, and at high leverage the two differ by an order of magnitude or more.
The way to reason about it next time: funding is a price on the queue. It tells you what the crowded side is paying to stay crowded. If you want the popular position in a leveraged market, you rent it by the interval, and the rent is set by how many other people want the same thing. If you plan to hold for days or weeks, that rent belongs in the trade’s cost estimate from the start, alongside the entry and exit commissions in the crypto fee calculator. If you cannot say roughly what it will cost you by the end of the week, the position is larger or longer than you have priced.
Related cost mechanics: maker and taker fees, how fee tiers work, and commission versus spread accounts. Terms used here are defined in the glossary.
Education only, not financial advice, and trading carries a risk of loss.
Key facts
- Funding is a transfer between traders on opposite sides of the contract, not a commission collected by the venue.
- It exists to pull the perpetual's price toward the spot price of the underlying asset, a job that expiry does for a dated futures contract.
- When the perpetual trades above spot, longs pay shorts. When it trades below spot, shorts pay longs.
- The payment is charged on position size, not on the margin you posted, so leverage magnifies it relative to your capital.
- It recurs at fixed intervals while the position is open, which makes holding time a cost variable in itself.
- The rate can be negative, meaning the side you are on receives the payment rather than pays it.
Frequently asked
Does the exchange keep the funding I pay?
In the standard design, no. The payment moves from the accounts on one side of the contract to the accounts on the other side, and the venue acts as the mechanism that calculates and settles it. Some venues also charge their own separate fees on perpetuals, but those are quoted as commissions and are a different line item from funding.
Can I avoid funding by trading something else?
Yes, by using instruments that do not need it. Spot has no funding because you own the asset outright. A dated futures contract has no funding because expiry handles convergence, though the cost is instead embedded in the gap between the futures price and the spot price at the time you buy in. The cost does not disappear, it changes shape.
Why did I pay funding on a trade that lasted only minutes?
Funding settles at the interval boundary, based on who holds the position at that moment, not on how long they held it. A position opened shortly before a settlement and closed shortly after it pays the full amount. A position opened and closed entirely between two settlements pays nothing.
Is a high funding rate a signal about price direction?
It is a signal about positioning, not direction. A high positive rate means leveraged long demand is pushing the contract above spot, and those longs are being charged for it. That tells you how crowded one side is and what holding it costs, which is information about the cost of the trade rather than a forecast of where the price goes.
Risk warning: trading is high risk and most retail accounts lose money. Education only, not financial advice.