Margin Funding interest is calculated to the second and uses the following calculation:
amount*(rate/100)*(seconds/86400)-fee.
Note: The fee rate for Funding offers 15%; for hidden offers, the fee is 18%. For details, please view our Fees page and our guide Margin Funding interest on Bitfinex.
As a funding provider, you will set your own funding rates when placing a funding offer in the Funding book.
If you have any questions, please contact Bitfinex Support for more information. We are happy to help!