Not necessarily the case. For my Discover card, a close reading of the cardmember agreement indicates that for each day, the daily interest rate is applied to the previous balance and any new transactions and fees that are posted (as of the date specified for the transaction)
before credits and payments are applied. This is computed at the close of the statement cycle. Since a credit can only be applied when a transaction posts, this means you would be chaged interest on the cash advance and associated fee from the day you took it out to the day it posts, inclusive. —
bwDraco 5 mins ago