Just completed a quick study of ACH money movements between liquid accounts at Alliant and Grow. Outcomes are mixed but wanted to report anyway, for whatever this might be worth:
Money was moving via ACH initiated at Alliant from Alliant checking to Grow Promo MM, also a very liquid account. Obviously the interest rate at Grow is a lot higher, hence the desire to move the funds, while maintaining liquidity.
Two such funds transfers, last month, took overnight to complete. Funds were credited at Grow one day after they were debited at and dispatched from Alliant.
But this month I experienced, on two occasions, SAME DAY crediting at Grow. The funds were debited at Alliant from checking, sent out via ACH, and credited at Grow, all on the very same day!
Q: So shin, you account for this . . . uh . . . how?
Sorry, I’m unable to account for or explain same day ACH. I’m unable to tell you why the funds moved same day at times and overnight at other times. I am merely your humble reporter, seeking higher returns on my liquid funds.
Q: Acknowledged. But shin, same day ACH is a GOOD thing. Right? You were happy, right?
I was happy in the above-reported instances, sure, because there was no loss of interest when the funds were credited at Grow on the same day they left Alliant. That was great!
But remain aware that same day ACH can cut both ways. When you initiate an ACH withdrawal instruction, expecting it to hit after the overnight, and it instead hits the same day . . well . . trouble could ensue.