Do banks include weekends & holidays when calculating daily interest?
If it hasn’t been credited to the account, then probably not. Banks are really good at maximizing their profits. For example, some banks go so far as to “encourage overdrafts by posting charges almost immediately while delaying the posting of deposits, and by processing large withdrawals and checks before smaller ones, leading to multiple [overdraft] fees.” But you’ll have to check “the fine print” or ask your bank to know for sure. There are probably as many ways to count days and calculate interest as there are banks.