Originally Posted by
philemer
Does anyone have something from FICO that they can link to? I see I lot of different figures flying around.

Now I'm upset at myself. Just spent an hour trying to find the source I had originally quoted that said 2%. All I can find is me saying I read it and quoted it in the past. So I'm going to stop saying it, since I can't support it.
However, here is a source from FICO that says the right number is above 0% and below 10%:
http://articles.marketwatch.com/2011...-rod-griffin/2
“The ideal place to be is under a 10% utilization rate but over 0%,” FICO’s Paperno said. “There needs to be some kind of recent activity” to activate a score.
Also, if you run FICO's own score analysis yourself on myfico.com, it reports that "FICO High Achievers" - scores 760+ - average a 7% utilization.