Gotcha. I wanted to make sure you weren't referring to a collection agency. Congrats, BTW! I had Regional too as a lender; they were great. After your last payment clears, they will mail you a PIF letter saying your loan has been satisfied. Shortly after that, they'll mail your title.
Installment utilization plays very little into FICO scoring. In fact, it's practically non-existant. I had a $20k loan with them and when the balance hit $5k, I PIF just to get it off my hands (at 19.9%, I wish I did that sooner). The part that will play into scoring is your mix of credit. Once a loan reports $0, the mix from that loan goes away. However, because you have one other installment loan (mortgage), I would predict that there would be no change in FICO score at all. If you want to guage the change, you'd want to pull your FICO reports immediately before and after it updates. They like to report beginning on the first of each month. In my case, my EQ went up 7 points and TU went down 5 points, but I had no other installment loans reporting outside of that.
