It depends on if the accounts have been updating every month or have been dormant. If they have been updating as charge offs, and factoring into your utilization, then you might not see a dip. If they have been dormant for a while, and you pay them, they will update to show either 0 balance or paid settled for less. You might see a temporary drop here. But once they are reporting 0, and stop updating every month, your scores can begin to get better. A charge off will still hurt you for the full 7 years. As I've found out here, charge offs and 90 day lates, are right under bankruptcy. So they suppress your score the entire 7 years.
Goal Scores: 700 across all three
If the original credior sold it to a CA. There should be a $0 balance reporting. Paying a CA off slowly wont do a thing to your score. If your paying the OC and they do show a balance. As you pay down the debt. It will update as if it was still open and reflect the newest balance until its paid. Once it hits $0 balance. Theremay be a small bump in your score depending on other factors that make up your file. So the question is. Is there a balance showing on the charge off? If not. There wont be any gains paying off a CA.
