The Real Cost of Funding Rates: What Three Days on a Perpetual Actually Costs
Using public funding-rate history to show how holding cost is calculated, when the funding rate is income, and why it can't be seen in the fee table.
The Real Cost of Funding Rates: What Three Days on a Perpetual Actually Costs
Bottom line first: The funding rate is a periodic transfer between holders of a perpetual contract, settled every 8 hours. It isn't a trading fee, so it doesn't appear in the fee table; but for anyone holding a position it's a real cost in hard cash — and it can also be income. Holding 3 days = 9 settlements, and in high-rate periods that's enough to eat the profit of one or two trades.
Measured average funding rates (snapshot date 2026-10-12, BTC perpetuals)
| Exchange | Average funding rate (per 8h) | Meaning |
|---|---|---|
| Binance | +0.000086% | Extremely close to zero, almost negligible |
| Gate | +0.000100% | Very low |
| Bybit | +0.001499% | Relatively the highest; the main reason Bybit's annual cost is pushed up |
| OKX | -0.000196% | Negative → in this period holding long is paid, holding short pays |
(Data from each exchange's public funding-rate history API, most recent 6 periods. Direction note: a positive rate usually means longs pay and shorts receive.)
How to work out your own holding cost
Holding cost ≈ position notional × funding rate per 8h × (holding days × 3)
Example: a long with 10,000 USDT notional, at Bybit's average (0.001499%/8h), held for 3 days:
10,000 × 0.00001499 × 9 ≈ 1.35 USDT
That looks small, but change it to 100,000 USDT notional held for 30 days:
100,000 × 0.00001499 × 90 ≈ 135 USDT
It never shows up in any fee comparison table, but it does leave your account balance.
Three easy traps
- Funding rates can be negative: then going long is actually receiving money. So judging "which exchange is cheaper to hold on" can't rest on a single moment — look at the long-run average and your direction.
- Rates swing hard: in extreme markets the funding rate can multiply by tens of times, and anyone holding long must factor this into expected cost.
- Settlement cycles can differ between exchanges: most are 8 hours, but some coins/exchanges differ — before opening a large, long-held position, go by the current parameters on that exchange's contract page.
Next steps
- The total cost calculator already includes funding fees: enter your holding days and see its impact on annual cost directly
- For the full picture of each exchange's fees: five-exchange annual cost comparison
Data source and fetch time: Binance /fapi/v1/fundingRate, OKX /api/v5/public/funding-rate-history, Gate /api/v4/futures/usdt/funding_rate, Bybit /v5/market/funding/history (all public APIs, fetched 2026-10-12T13:47:06Z, averaging each one's most recent 6 periods). Snapshot date 2026-10-12.
Disclaimer: Historical rates don't represent the future; this site is not investment advice and promises no returns.