In my experience it has been $1K load safe-to-debit per 24 hours as well. The odd thing is, the safe load does not seem to count against the debit load, but a debit load counts against the safe load. In other words, no problem loading the safe and then immediately loading your debit card, and repeating every 24 hours. However, if you load the safe and then wait to load the debit card, you will need to wait 24 hours from the debit load before you can load the safe again.