Well, if your AAoA is exactly 6 years, your new AAoA would be 5.65 years. But if your AAoA is actually 6y 11m, which would display as six years, your new AAoA would be 6.5 years. So you'd need to work it out to find the exact AAoA.
How to figure AAoA:
Figure how old in months every account on your report is, whether open or closed. So if an account was opened in January 2005, and now it's April 2009, it would be 51 months old (4y 3m.) Add up all the ages of accounts and divide the figure by twelve. That's your AAoA in months. Subtract the closest lower multiple of 12 from this figure (that is the years portion of the AAoA), and the remaining figure is the months portion. So if your AAoA is 76 months, that would be 76 - 72 = 4; 6 years, 4 months. Or you can just do the whole thing on the calculator and come out with a fraction of a year, like the 5.65 above, which would be about five years, six and a half months.
As for when the ding goes away, that varies by your credit profile and score. Is this your only negative? If so, you're probably over 750 or 760 on your TU, and this is the only thing left to fuss at you about. If it's one of several negatives, and listed last, it might stop showing up as your scores get better.
Age isn't really a negative so much as it's a comment on a simple fact of life. Just remain restrained in getting new credit, and keep an eye on older closed accounts, which will eventually drop off and drop your AAoA (and presumably your longest history) again.
* Credit is a wonderful servant, but a terrible master. * Who's the boss --you or your credit?
FICO's: EQ 781 - TU 793 - EX 779 (from PSECU) - Done credit hunting; having fun with credit gardening. - EQ 590 on 5/14/2007
