I think your LO gave you incorrect info. I'm in the same boat as you so I'm monitoring my scores obsessively and researching this exact topic. From what I've read and experienced myself, the CC companies report different information at different times during the month depending on what it is. For example, if you went to one of your CC online accounts and updated your phone number or some kind of personal info, that would more than likely trigger an update to the CRA's right away (I say more than likely because it doesn't always happen but should). If you pay your balance in full during any time of the cycle, that would also likely warrant an immediate CRA update. If you just pay the minimum amount due or an amount less than the total balance, most likely the CC company will report a few days after the close of the statement. Every CC is different as far as the start date and end date of statement cycles. My BofA cycle ends on the 25th, my WF ends on the 22nd and Cap1 ends the 29th. I have heard some folks will 'trigger' a premature update by going into their CC account profiles online and updating their personal information, ie., adding a new phone number or change of address (obviously this would be true and accurate info, not false info).
Do you subscribe to myfico scorewatch? What I've learned from that is that you only get updated FICO 8 scores, not FICO 4 or other FICO scoring models. So at the time you subscribe, all FICO models other than FICO 8 will remain what they are that day until you purchase NEW reports for each CRA. My recommendation would be to pull new reports when you see a change in your scores that would indicate those zero balances have been reflected.
As far as the LO's info that they all report on the same day of the month, that just isn't the case. I hope you see the change you're looking for in order to start the mortgage process! I know it's a stressful, yet exciting, game of wait and see!
