Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Purpose of having good credit when you are well-off?
Your dad may have paid an "opportunity cost" for that outright purchase.  If the money he saved had been invested elsewhere, he may have made more money.  If he was that well off, then his interest rate should have been the lowest possible.  My own father is a multi-millionaire (not myself) and he could afford to have paid for his house outright.  He didn't though.  To do so would have meant cashing in on several investments.  I don't know his interest rate but let's say it was 2.5%.  If he invests that million dollars into something he expects to get a 7% return on in the same period, then he would make more money by borrowing the money.  Hence, he would be paying an opportunity cost. Assuming you need to work, some jobs will also do background or credit checks.  Credit cards can be used by well off people to actually make them money by offering rewards (compared to straight cash transactions).  The better your credit history, the better the cards/rewards you can get.  You can build that credit history better by having these loans and making timely payments.