Dear Liz: You recently answered someone whose credit scores dropped more than 30 points after they paid off a mortgage. You mentioned that the big drop was probably because the mortgage was the person’s only installment loan. Credit scores like to see active use of both types of credit, installment loans and credit cards. Because this person’s scores were so high, they almost certainly were still actively using credit cards. But you should remind people that if they stop using credit, eventually they won’t have any credit scores at all.
Answer: Consider them reminded. There’s no need to carry balances; just using credit cards regularly is enough.
A few other readers wrote in suggesting the letter writer get a personal loan as a way of increasing their scores. Although personal loans can be a great help to people building credit, there’s really no point in increasing scores once they’re above about 760 on a 300-to-850 scale. Higher scores only get you bragging rights, and it would be a little silly to pay a lender unnecessary interest to get those.