I also found out that your credit is ran 2 times a month usually by different creditors. And reported at different times. And if you charge something right before they check your credit, it may look like you owe so much. Even if you were planning on paying it off in say 2 weeks. Also, I charged a lot at Christmas knowing I was paying it off by the end of January and it killed my credit Bc of debt to credit ratio. lesson learned!