Binance’s margin account interest rate is calculated on an hourly basis.
NOTE: If funds are borrowed for less than 1 hour, the interest rate will still be calculated as for assets borrowed for 1 hour.
If the daily interest rate is 0.02%, the hourly interest rate is calculated as 0.02%/24.
The calculation formula: I (interest) = P (borrowed money) * R (daily interest 0.02%/24) * T (in hours)
If user A borrows 1000 USDT at 13:20 PM, and repays at 14:15 PM, the interest rate is calculated as 1000 *（0.02%/24）* 2 = 0.01666667 USDT.
Margin account interest rates may be adjusted from time to time. Please refer to the following link for the latest interest rates, borrow limits and other details regarding Margin trading: