Funding Is a Cost That Never Stops Ticking
The basics first, briefly: a funding rate is a peer-to-peer payment that keeps a perpetual contract pegged to spot. When funding is positive, longs pay shorts; when it's negative, shorts pay longs. If that mechanic is new to you, read funding rate explained first — this guide is the deeper companion, focused on what funding does over time.
Here's the fact that matters most: the charge lands per interval, on your full notional, and it does not stop while the position is open. Most exchanges settle three times a day — 00:00, 08:00, and 16:00 UTC. A position held for five days passes through fifteen separate funding charges.
None of those fifteen charges shows up in the entry-versus-exit price difference that most people call their profit. That gap between gross and net is where funding quietly does its damage.
The Green Exit That Actually Lost: a 5-Day Example
Set up a clean case. You go long $10,000 of BTC and hold it for exactly five days while funding runs a steady, unremarkable 0.01% per 8-hour interval.
Funding per interval = 0.01% × $10,000 = $1. Intervals in 5 days = 3 × 5 = 15. Cumulative funding = $1 × 15 = $15.
Now the outcome. BTC drifts up 0.2% over the five days, from $60,000 to $60,120. Gross PnL = 0.2% × $10,000 = $20. Feels like a win.
Subtract funding: $20 − $15 = $5. Add round-trip taker fees (~0.055% per side, about $11 total) and you land near −$6. The trade you'd log as green actually lost money.
Push it harder: at a frothy 0.05% per 8h, that same long pays $5 per interval — $75 over five days. A 0.2% gain doesn't come close. You'd need BTC up nearly 1% just to break even on funding alone.
| Gross PnL (what you log) | Net PnL (what you keep) | |
|---|---|---|
| Source | Entry vs exit price | Entry vs exit, minus funding & fees |
| 5-day BTC example | +$20 (price up 0.2%) | −$6 after $15 funding + $11 fees |
| Funding included? | ❌ No | ✅ All 15 charges |
| Verdict | ✅ Looks green | ⚠️ Actually red |
Funding Is a Flow, Not Always a Tax
The flip side is real. If funding had run negative — say −0.01% because the market was heavily short — that same five-day long would have collected $15 instead of paying it. The position pays you to hold it.
So funding isn't always a cost; it's a flow whose direction you need to know. Knowing the sign turns it from a tax you eat into an edge you collect. The mistake isn't being on the paying side — it's not knowing which side you're on.
Common Mistakes
- •Judging a trade by entry and exit price alone. That number is gross PnL — an illusion of profit until funding and fees come off.
- •Assuming funding is small because one charge is small. One charge is. Fifteen of them on a leveraged position is not.
- •Forgetting which way funding flows. In a short-heavy market, longs get paid — and traders who assume they're always paying miss it.
- •Tracking funding "roughly" in a spreadsheet. The rate changed every interval; across a dozen positions on three exchanges, manual accounting is hopeless.
How This Shows Up in Your Trading Journal
This is the gap that matters. Exchange order history and hand-built spreadsheets show the entry, the exit, and the difference. They do not weave in the fifteen funding charges that hit between open and close. So your journal lies in the optimistic direction: it inflates winners and hides break-evens.
Tradermake.money is funding-aware from the ground up. It auto-imports every fill and every funding payment from your 10 supported exchanges, then reports true net PnL — gross result minus trading fees minus every funding charge across the position's life. The AI coach flags when funding, not your thesis, is what turned a trade red. You finally see which of your "winners" were quietly paid back to the shorts.