Formula and limits
Formula and limits
Funding is calculated on position notional. Leverage does not change the rate on a given notional position, but it magnifies that cash flow relative to initial margin.
notional = margin × leverage; cash flow per settlement = notional × period rate × side. With a positive rate, long is negative and short is positive; a negative rate reverses it.
annualized cash flow on notional = period rate × side × 24 ÷ interval hours × 365; the initial-margin rate also multiplies by leverage. A positive result means funding received for that side; a negative result means funding paid. Both assume the current rate and cadence stay constant, without compounding. They are not borrowing interest.
Enter the settlements the position is expected to cross. OKX cadence can change dynamically. We checked the official API documentation in September 2026.