It's because the earliest an ACH payment can draft is after 2 business days. So, if you were to schedule an additional payment on, say, a Monday, the earliest that payment can be drafted is Wednesday. On Friday, Saturday, and Sunday, the earliest the payment will draft is on Tuesday. The only exceptions are holidays. Holiday payment schedules are different, and we'll send you an email ahead of time letting you know what the schedule will be. And as another option, you can now easily schedule a same business day debit card payment!