To keep it simple...say i have two credit cards. One of them was opened 10 years ago and is still open. The other was opened for one month and CLOSED because I didn't like the interest rate offered. (One of those 9.99, 12.99, or 17.99 offers then gave the crappy APR after approved). There is no negative history on either. I just want to know will the average age of credit history (according to credit bureau) be 5 years or 10 years?? (10 years + 1 month) / 2 = approx 5 years or 10 years / 1 = 10 years I want to know if I am better off keeping a card with a bad apr to keep the avg age of credit from being dragged down so much?? If its the average of ALL accounts then the average will move up much slower than if its the average of ONLY OPEN accounts. To keep it simple...say i have two credit cards. One of them was opened 10 years ago and is still open. The other was opened for one month and CLOSED because I didn't like the interest rate offered. (One of those 9.99, 12.99, or 17.99 offers then gave the crappy APR after approved). There is no negative history on either. I just want to know will the average age of credit history (according to credit bureau) be 5 years or 10 years?? (10 years + 1 month) / 2 = approx 5 years or 10 years / 1 = 10 years I want to know if I am better off keeping a card with a bad apr to keep the avg age of credit from being dragged down so much?? If its the average of ALL accounts then the average will move up much slower than if its the average of ONLY OPEN accounts. IN RESPONSE TO THE PERSON THAT ANSWERED MY QUESTION SECOND I'm happy with the 10 year old card, no plans in closing it. The new card is the one with the bad rate.