What a Funding Rate Actually Is
Perpetual futures have no expiry date. A traditional futures contract settles on a fixed date, which forces its price back toward spot as that date approaches. Perps removed the expiry, so they needed another way to stop the contract price from drifting away from the underlying asset. That mechanism is funding.
Think of it as a tether. If the perpetual trades above spot, the market is too long, so funding turns positive to penalize longs and reward shorts. That cost nudges traders to close longs or open shorts, pulling the perp price back down toward spot. When the perp trades below spot, the reverse happens. The rate is the pressure that keeps a contract with no expiry honest.
Crucially, funding is a peer-to-peer transfer. The exchange takes nothing from the funding payment itself — it earns its money on trading commissions. One side of the book pays the other.
How the 8-Hour Charge Works
On most major venues — Binance, Bybit, OKX — funding settles three times a day, at 00:00, 08:00, and 16:00 UTC. You only pay or receive funding if you're holding an open position at the exact settlement timestamp. Open a position at 08:05 and close it at 15:55, and you pay nothing for that window. Hold one second past 16:00 and you're charged for the full interval.
The amount is calculated on your position's notional value, not your margin. A trader using 10x leverage on $1,000 of margin holds a $10,000 position, so funding is charged against the full $10,000.
The rate itself has two parts. The interest component is a small fixed baseline, often 0.01% per 8h, reflecting the cost of holding the quote versus the base currency. The premium component captures how far the perp has strayed from spot, measured by the order book. Most of the time the interest piece dominates and you see the familiar 0.01%. In a heavily one-sided market, the premium spikes the rate far higher.
Positive vs Negative Funding
A positive funding rate means the perp is trading at a premium to spot, the crowd is long, and longs pay shorts. This is the default state in a bull market, when everyone wants leveraged exposure.
A negative funding rate means the perp trades below spot, the crowd is short, and shorts pay longs. You'll see this during sharp sell-offs or capitulation, when fear has people piling into shorts. A patient long can actually get paid to hold through it.
| Positive Funding | Negative Funding | |
|---|---|---|
| Perp vs spot | Trading at a premium | Trading at a discount |
| Who pays? | Longs pay shorts | Shorts pay longs |
| Crowd is... | Mostly long | Mostly short |
| Typical market | Bull run, leverage demand | Sell-off, capitulation |
| Holding a long? | ❌ You pay each interval | ✅ You get paid each interval |
Worked Example: Who Pays Whom
BTC perp funding prints at 0.01% for the upcoming 8-hour interval. You're holding a $60,000 long — 1 BTC at $60,000 — at the settlement time. Funding charge = 0.01% × $60,000 = $6. Because funding is positive, you pay that $6 to the shorts. Had it printed negative at -0.015%, you'd receive $9 for holding the same long.
Six dollars on a $60,000 position sounds trivial — and for one interval it is. The trap is that it repeats: three times a day, every day, for as long as you hold. Hold that long for a week at a steady 0.01% and you've paid $6 × 3 × 7 = $126 in funding, before a single trading fee. A trade that closes a touch above your entry can still be red once that week of funding is subtracted.
At 20x leverage, funding eats your margin twenty times faster than the headline rate suggests relative to what you put down — the charge is always on the full position size, never on your deposit.
Common Mistakes
- •Confusing funding with a trading fee. Funding is separate from maker/taker commissions and can be positive or negative for you. People budget for fees and forget funding entirely.
- •Calculating funding on margin instead of notional. The charge is on the full position size, so leverage multiplies it.
- •Ignoring it on swing trades. A scalper rarely holds across a settlement; a swing trader holding for days is exposed to every interval, and in a hot market with funding above 0.05% per 8h that drag compounds fast.
- •Assuming the exchange pockets it. It doesn't — funding flows trader to trader.
How This Shows Up in Your Trading Journal
Here is the uncomfortable part. Most manual journals, and plenty of exchange PnL screens, report gross PnL: entry price, exit price, and the difference. They quietly omit funding. So a trade that looks green on paper can be flat or negative once a week of funding payments is subtracted.
Tradermake.money is funding-aware. It auto-imports your fills from 10 exchanges and reconstructs each trade's true net PnL after both trading fees and every funding payment you made or received across its lifetime. You stop guessing whether that "winning" swing actually made money.