Funding Rate: What Perpetual Traders Actually Pay

A perpetual future has no expiry date. That single design choice is what makes it convenient — and it creates a problem. A contract that never settles has nothing forcing its price back toward the asset it is supposed to track. Funding is the mechanism that does that job, and it is paid by traders, to traders, several times a day.

Most traders know funding exists. Far fewer know what it costs them over a month.

What funding actually is

Funding is a periodic payment exchanged directly between the two sides of the market. On most venues it settles every eight hours, three times a day.

The rate is built from two parts: the premium of the perpetual price over the underlying index, and a small interest component. The result is simple in direction:

• Positive funding — the perpetual trades above the index, so longs pay shorts.
• Negative funding — the perpetual trades below the index, so shorts pay longs.

The exchange is not the counterparty here. It moves the payment from one side of the book to the other. That is why funding tends toward a self-correcting loop: the more crowded one side becomes, the more expensive it gets to stay there.

The number that matters is the annualised one

A typical baseline rate is 0.01% per eight-hour window. It looks like nothing. Multiply it out:

• 0.01% × 3 = 0.03% per day
• 0.03% × 365 ≈ 10.95% per year

That is the calm state of the market. In an aggressive trend, funding on a major pair can sit at 0.1% per window for days:

• 0.1% × 3 = 0.3% per day
• 0.3% × 365 ≈ 109% per year

At that level the market is charging you more than the asset historically returns in an average year, purely for the privilege of staying on the popular side of the trade.

Leverage multiplies the cost against your own capital

Funding is charged on notional size, not on your margin. This is where the arithmetic turns uncomfortable.

Suppose you post $1,000 of margin at 10x leverage, giving you $10,000 of exposure, and funding runs at 0.03% per day:

• cost on notional: $10,000 × 0.03% = $3 per day
• relative to your capital: $3 ÷ $1,000 = 0.3% of your margin, every day

Hold that position for two weeks and roughly 4% of your account has gone to the other side of the market before price has done anything at all. In an evaluation with a fixed drawdown limit, that is a meaningful part of your allowance spent on carry rather than on being wrong.

What funding tells you, and what it does not

Sustained high positive funding says one thing reliably: the long side is crowded and paying to stay there. Crowded positioning is fragile positioning, because a modest move against it can start forced liquidations that feed on themselves.

What it does not tell you is direction or timing. Funding can stay elevated through an entire trend, and traders who treat "expensive" as "about to reverse" tend to be early and repeatedly stopped out. Read it as a description of the market's structure, not as an instruction.

Practical checks

1. Look at funding before you plan to hold, not after. For an intraday trade it rounds to noise. For a multi-day hold it is a real line item.
2. Compare carry to your expected move. If your idea needs 2% and the position costs 0.3% a day, the idea has a shelf life. State it out loud: this trade has to work within N days or the cost eats it.
3. Convert to your own capital, not to notional. The percentage that matters is the one measured against your margin.
4. Watch the trend in the rate, not just its level. Funding climbing for several sessions in a row describes a market getting more one-sided.

The one cost you control

Direction is uncertain. Volatility is uncertain. Funding is published in advance, updates on a schedule, and can be checked in seconds. It is one of the few numbers in this market that you can know before you commit capital.

Traders who survive long stretches are rarely the ones who predicted best. They are the ones who kept their known costs small enough that a few good ideas were still worth having.