What is funding rate pain?
On perpetual futures, funding is paid between longs and shorts every 8 hours. When the rate is positive, longs pay shorts. The amount is: position_size × rate. The key problem is that funding is on the full notional position, not just your margin — so leverage multiplies the drain.
At 0.01%/8h (normal) and 10x leverage, you lose 0.3%/day of your margin holding long. That's 9% of margin in 30 days from funding alone, before any price movement. During high-funding environments (0.05–0.1%/8h), the drain accelerates: at 0.05%/8h and 25x, you're losing 3.75%/day. A sideways week costs 26% of your margin.
The break-even price move is the price gain you need per day just to stay flat after funding. At 10x and 0.01%/8h, price needs to rise 0.03% daily. Most days it doesn't — which is why leveraged long biases in sideways markets are quietly expensive.
Funding rate presets
| Rate / 8h | Environment | Daily cost at 10x / $1k |
|---|---|---|
| 0.005% | Very calm | $0.15 |
| 0.01% | Normal | $0.30 |
| 0.05% | Hot market / bull run | $1.50 |
| 0.1% | Extreme / memecoin | $3.00 |
| −0.01% | Short-bias (you receive) | +$0.30 |
Negative rates mean short-holders receive funding — useful for delta-neutral strategies or short positions in bear regimes.