Funding rates explained: what perpetual futures charge and what it tells you

A funding rate is a small payment exchanged between traders holding long and short positions in a perpetual future, usually every 8 hours on many exchanges. When funding is positive, longs pay shorts; when it is negative, shorts pay longs. The payments pull the contract price back toward spot, and their size also shows which side of the market is crowded.

This guide explains why perpetual futures need funding, how to read the sign and the size of the rate, what it costs to hold a position through it, and how to use extreme funding as a warning without treating it as a signal. It assumes you know the basics of leverage and margin. If not, read leverage and liquidation first.

What is a perpetual future?

A traditional futures contract has an expiry date. On that date it settles at the spot price, so as expiry approaches, the contract and the coin are pulled together. A perpetual future, often called a perp, has no expiry. You can hold it for an hour or a year. It tracks the coin's price without you owning the coin, and it is where most leveraged crypto trading and most shorting happen.

Without an expiry, nothing forces the perp back to spot. If more traders want to be long than short, they can bid the perp above spot and keep it there. Funding is the mechanism that stops this drift.

How do funding rates work?

At set times, every trader holding a position pays or receives a percentage of their position size. The money passes between traders. On most exchanges the exchange itself does not keep it.

• Positive funding: the perp is trading above spot, usually because longs are in demand. Longs pay shorts. Holding a long gets more expensive and holding a short gets paid, which nudges traders toward shorting the perp and pulls its price down toward spot.
• Negative funding: the perp is trading below spot, usually because shorts are in demand. Shorts pay longs, which nudges traders the other way.

The rate is usually worked out from the gap between the perp and an index of spot prices, plus a small fixed interest component. On many exchanges, when that gap is small, the rate settles at a baseline around 0.01% per 8 hours. That is why you often see 0.01% listed as "normal". The exact formula, the caps on how high it can go and the interval all vary. Every 8 hours is common, but some exchanges and some contracts settle every 4 hours or every hour, and some switch to shorter intervals when the market is stretched.

You only pay or receive funding if you hold the position at the moment the payment is settled. A trade opened and closed between two funding times never touches it.

Funding is also why the gap rarely gets very wide. When it is strongly positive, traders who hold the coin on spot and short the same amount on the perp can collect the payments with little exposure to price. Their shorts add selling pressure to the perp, which helps pull it back.

How much does funding cost?

The key thing to remember is that funding is a percentage of the position size, not of the margin you put up. Leverage does not change the rate, but it makes the payment bigger compared with the money behind the trade.

So for short trades at normal rates, funding is close to irrelevant. For trades held for days or weeks in a heated market, it can decide whether the trade was worth taking. That matters most for slower approaches such as trend following, where a position may be open for a long time.

Funding can also be received. A short held while funding is strongly positive is paid every interval. That is a real benefit, but it is rarely a good reason to take a trade on its own: the rate can change within a day, and one adverse move can wipe out weeks of payments.

What does funding tell you about the market?

Because funding reflects how hard one side is pushing on the perp, it works as a rough gauge of positioning. It does not say who is right. It says who is crowded.

Very high positive funding

During a strong rally, more and more traders open leveraged longs. They are willing to pay rising funding to stay in, and the rate climbs well above the baseline. This is what the chart above shows: as price rallies, funding turns more and more positive.

A crowded long side is fragile. Many of those positions have stops and liquidation prices clustered just below recent swing lows and round numbers. When price dips into them, forced selling pushes it lower, which triggers the next layer. This is a long squeeze. In the chart, a sharp drop flushes the longs out, and with them gone, funding falls back to around zero or below.

Deeply negative funding

The mirror case. After a sell-off, traders pile into shorts and pay to hold them. If price then rises into their stops, forced buying drives a fast rally: a short squeeze. Deep negative funding during a fall is a warning that shorting late may mean joining a crowded trade.

Funding around the baseline

Funding near 0.01% per 8 hours usually means neither side is paying much to be positioned. It tells you little, which is itself useful: the market is not obviously stretched in either direction.

Is funding a trading signal?

Not on its own. High funding says longs are crowded. It does not say when they will be flushed. Funding can stay elevated for days or weeks in a strong trend while price keeps climbing, and someone shorting every high reading steps in front of that trend again and again. The same is true of deep negative funding in a falling market.

It works better as context, the same way RSI works better as a filter than as a trigger. Some ways the site's approach can use it:

• As a reason to be more careful with new longs when funding is very high, for example by waiting for a pullback to a level rather than chasing, or by using a smaller position.
• As a warning against shorting a sell-off late when funding is deeply negative.
• As supporting context for a reversal that already has its own trigger, such as a sweep of a level and a close back inside it, as in the sweep and change of character setup.

The trade itself still needs a level, a trigger, a stop past structure plus a 0.2 ATR buffer, and a first target at least 1.5R away. None of these rules is known to make money, and adding funding to them does not change that.

How does open interest fit in?

Open interest is the total size of all perp positions currently open. Every long has a matching short, so it does not say which side is winning. It says how much leveraged money is in the market. Read alongside funding and price, it adds detail:

• Price up, open interest up, funding rising: new leveraged longs are opening. The rally is increasingly built on borrowed money, which is the crowded setup described above.
• Price up, open interest down: shorts are closing, which can be part of a short squeeze. It is a less crowded rally.
• Price down sharply, open interest down sharply, funding falling: positions are being closed or liquidated. This is what a long squeeze looks like in the data.
• Price flat, open interest climbing: leverage is building up on both sides. A sharp move in either direction may follow, though the data does not say which.

These are tendencies, not rules, and they vary by coin and by exchange. Open interest and funding on a small coin can be dominated by a few large positions. Price and volume still come first.

How does funding affect holding a leveraged position for days?

For a trade held over many funding intervals, three things change.

The cost adds up. At normal rates it is small. In a hot market it can reach a large share of R per week, as the worked example shows. Before holding through a long rally, estimate the cost over your expected holding time and compare it with 1R.

The liquidation price drifts. On many exchanges funding is paid from the position's margin. On an isolated position with thin margin, each payment slightly reduces the cushion, so the liquidation price creeps closer to the current price. Over a week of high funding this can be noticeable. Keeping leverage low enough that liquidation sits well beyond the stop leaves room for that drift.

The crowd you are in matters. Holding a leveraged long while funding is very high means holding the same position as many other traders, with stops and liquidation prices near yours. If a squeeze comes, it comes through those levels. Managing a setup covers when to move a stop or take partial profit, which matters more in that situation.

Common mistakes

• Shorting because funding is high. High funding can last a long time in a strong trend, so shorting every high reading means fighting the move without a trigger or a level.
• Working out funding on margin instead of position size. The rate applies to the whole position, so at 10x the payment is ten times larger compared with your stake than it looks.
• Ignoring funding on multi-day trades. At heated rates a week of funding can cost around half of R, enough to turn a small winner into a loss.
• Taking trades to collect funding. Being paid to hold a position is a bonus, not a strategy. One adverse move can cost more than weeks of payments.
• Assuming every exchange works the same way. Intervals, caps and formulas differ, so the rate you see on one venue may not be the one you pay on another.
• Reading funding without open interest and price. A high rate on a small, thin coin means something very different from the same rate on a large, liquid one.

What to check

1. What is the current funding rate, and how often is it paid? Check the interval for this contract. A rate paid hourly costs eight times as much per day as the same rate paid every 8 hours.
2. What will it cost over your expected hold? Multiply the rate by the position size and the number of intervals, then divide by your dollar risk to see it in R.
3. Is funding near the baseline or at an extreme? Near 0.01% per 8 hours it says little. Far above or deeply negative, it says one side is crowded.
4. What is open interest doing? Rising open interest with rising funding means leverage is building. A sharp fall in both often means a squeeze has already happened.
5. Does your trade have its own trigger and level? Funding is context. The entry still needs a level, a confirming close and a stop past structure.
6. Where is your liquidation price after a few days of funding? On thin margin it drifts closer. Make sure it stays well beyond the stop.
7. Would spot do the job? If the position fits in your account without leverage, spot avoids funding and liquidation entirely.

Further reading

• Perpetual futures Wikipedia
• Short squeeze Wikipedia