I understand that its IDEAL to be within 10%. But right now My Utilization for that Single Credit card, is 59%..  I know individual UTIL % and overall UTIL% impacts your score... So since my damage is already done exceeding the 50% individual credit UTIL, thus the score of 736. how far can i exceed above 59% but below 90%, without impacting my Score...not sure if this is an individual CC UTIL or Overall UTIL thing. Because, i want to to pay my taxes u sing that card, without using my cash reserve that i'm saving for showing the mortgage underwriter.